CN214622429U - Glass melt high-temperature conductivity measuring device - Google Patents
Glass melt high-temperature conductivity measuring device Download PDFInfo
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- CN214622429U CN214622429U CN202120673287.XU CN202120673287U CN214622429U CN 214622429 U CN214622429 U CN 214622429U CN 202120673287 U CN202120673287 U CN 202120673287U CN 214622429 U CN214622429 U CN 214622429U
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- 239000000156 glass melt Substances 0.000 title claims abstract description 98
- 210000004907 gland Anatomy 0.000 claims abstract description 69
- 239000011521 glass Substances 0.000 claims abstract description 49
- 239000006060 molten glass Substances 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 17
- 238000005259 measurement Methods 0.000 claims description 13
- 229910052697 platinum Inorganic materials 0.000 claims description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 6
- 239000010431 corundum Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 230000003028 elevating effect Effects 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 5
- 239000000523 sample Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 18
- 238000003825 pressing Methods 0.000 description 18
- 239000007788 liquid Substances 0.000 description 12
- 239000010453 quartz Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 238000001514 detection method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
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- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000005518 electrochemistry Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
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- 241001391944 Commicarpus scandens Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001413 alkali metal ion Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
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- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model discloses a glass fuse-element high temperature conductivity measuring device, include: the high-temperature furnace is provided with a furnace temperature control system, a high-temperature resistant and insulating crucible is placed in the high-temperature furnace, a groove for placing a glass sample to be measured is formed in the bottom of the inner side of the crucible, and the volume of a molten glass melt is larger than the volume of the groove; two opposite sides in the groove are respectively connected with an electrode plate, and the two electrode plates are electrically connected with the electrochemical workstation; a high-temperature-resistant and insulating gland is arranged above the groove, a lifting device is arranged above the gland, the gland is extruded or loosened through the lifting device, the attachment or separation of the gland and the groove is realized, and the sealed electric conduction pool formed by the groove, the electrode plate and the gland is ensured to be filled with glass melt. The utility model discloses a measuring device has the degree of accuracy height, stability strong, and can realize advantages such as different types of glass fuse-element conductivity test under different temperatures.
Description
Technical Field
The utility model belongs to the technical field of the glass production test, concretely relates to glass fuse-element high temperature conductivity measuring device, the device are fit for the rapid survey of different viscosity glass fuse-element conductivities.
Background
Generally, glass is a good insulator at normal temperature, and exhibits a low specific resistance in a high-temperature state because the mobility of alkali metal ions contained therein is greatly improved as compared with that at normal temperature. However, there is no international standard method for measuring the conductivity of high-temperature molten glass.
In the existing high-temperature molten glass conductivity testing device, an observation window is arranged on a high-temperature furnace, scale marks are marked on the wall of a transparent quartz crucible, two sides in the transparent quartz crucible are respectively connected with an electrode, and the two electrodes are both connected with an electrochemical workstation. In the working process, the height of the molten glass liquid in the transparent quartz crucible at different temperatures is observed through the transparent observation window on the front surface of the high-temperature furnace, the accurate height of the molten glass liquid can be known by observing the position of the glass liquid level on the scale mark, and the temperature of the furnace body, namely the resistance value of the glass to be measured under various temperature conditions, is recorded through the computer. And calculating the conductivity of the glass to be measured under each temperature condition by using the formula sigma L/RA. Sigma is the conductivity of the glass to be measured, R is the glass resistance of the glass to be measured by the electrochemical workstation at different temperatures, L is the distance between two electrode plates, A is the relative area between the two electrode plates, wherein A ═ h × b, h is the height of the molten glass liquid in the transparent quartz crucible, and b is the longitudinal width of the transparent quartz crucible.
The defects of the prior art mainly comprise: (1) the cross-sectional area of the glass melt is obtained through an observation window on the high-temperature furnace and scales marked on the transparent quartz crucible, the reading has larger subjectivity and certain error, and the viscosity of glass made of different materials and the viscosity of the glass melt at different temperatures are different, so that the flowability of the glass melt in the transparent quartz crucible is different, and the accurate reading is difficult finally; (2) part of glass melt is opaque and generally has other colors (such as glass melt containing metal ions such as iron, copper and the like), and the liquid level position of the glass melt is difficult to accurately judge due to the fact that the glass melt is easy to splash at high temperature, so that accurate reading cannot be carried out; (3) the service temperature of a common transparent quartz crucible is generally not more than 1100 ℃, even a high-purity quartz crucible is cracked due to crystal transformation or turned into white due to crystallization behavior at high temperature, so that reading cannot be carried out, and when the service temperature exceeds 1450 ℃, the quartz crucible is relatively brittle and is easy to break; (4) for the high-temperature conductivity measurement technology of glass melt, the test temperature is generally not lower than 1200 ℃, and if a special transparent crucible is adopted, the price is generally higher, so that the test cost is increased.
In addition, common methods for measuring the conductivity of molten glass include a method of directly measuring the resistance with a potential probe and a method of indirectly measuring the resistance with a vessel coefficient. The former has high accuracy, but needs a special disposable test container groove, and has high cost. The latter can indirectly obtain the conductivity of the glass melt at high temperature through the relation between the container coefficient and the melt conductivity. However, in the currently adopted measuring method, the reappearance precision of the liquid level of the glass melt and the position of the electrode is generally not high due to the influence of the viscosity and the capillary action of the glass melt, so that the accuracy of the measuring result is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the data measurement to the relative area between two electrode slices that exist among the prior art is inaccurate, leads to that the accuracy of molten glass conductivity measurement result is low, reproducibility is poor to and measuring device's the poor shortcoming of commonality, provide a compact structure, the principle is simple, the degree of accuracy is high, stability is strong, and can realize the glass fuse-element high temperature conductivity measuring device of the conductivity test of different kinds of glass fuse-element under different temperatures.
In order to solve the technical problem, the utility model discloses a following technical scheme:
a glass melt high temperature conductivity measurement device comprising: the high-temperature furnace is provided with a furnace temperature control system, a high-temperature resistant and insulating crucible is placed in the high-temperature furnace, a groove for placing a glass sample to be measured is formed in the bottom of the inner side of the crucible, and the volume of a molten glass melt is larger than that of the groove; two opposite sides inside the groove are respectively connected with an electrode plate, and the two electrode plates are electrically connected with the electrochemical workstation; the high-temperature-resistant and insulating gland is arranged above the groove, the lifting device is arranged above the gland, the gland is extruded or loosened through the lifting device, and the gland is attached to or separated from the groove, so that the sealed conducting cell formed by the groove, the electrode plate and the gland is full of glass melt.
As a further improvement, the lifting device comprises a screw rod, a connecting rod and a high-temperature-resistant and insulating pressure rod, one end of the pressure rod is fixedly connected with the connecting rod, the other end of the pressure rod passes through the top of the high-temperature furnace and is arranged above the gland, the connecting rod is connected with the screw rod, and the screw rod is connected with the servo motor.
As a further improvement, the lifting device further comprises a supporting rod, the supporting rod is arranged in the same direction as the screw rod, and the connecting rod moves up and down along the supporting rod under the driving of the screw rod.
As a further improvement of the utility model, the crucible, the gland and the pressure rod are all made of corundum or zirconia.
As a further improvement of the utility model, the cross section of the gland is circular, and the cross section of the groove is square; the diameter of the gland is smaller than that of the crucible and larger than the diagonal length of the cross section of the groove.
As a further improvement, the electrode plate is embedded on the inner side wall of the groove, and the surface area of the electrode plate is equal to the inner side wall area of the groove.
As a further improvement of the utility model, every the electrode slice all connects through the wire electrochemical workstation.
As a further improvement of the utility model, the electrode plate is a platinum electrode plate, and the wire is a platinum wire.
As a general technical concept, the utility model also provides a glass melt high temperature conductivity measuring method, including following steps:
1) processing a glass sample to be detected into a required size so as to ensure that the volume of the molten glass sample to be detected is larger than that of the groove;
2) placing the processed glass sample to be detected in a groove at the bottom of the inner side of the crucible, respectively embedding an electrode plate at two opposite sides in the groove, connecting the two electrode plates with a lead, and placing a gland on the glass sample to be detected;
3) the crucible is placed in a high-temperature furnace, the adjusting pressure rod is positioned above the gland, and the servo motor is used for adjusting the pressure rod to descend and contact the upper surface of the gland;
4) connecting a lead with an electrochemical workstation, setting a heating program of a high-temperature furnace through a furnace temperature control system, and heating a glass sample to be measured;
5) after reaching the preset temperature, continuously preserving the heat to ensure that the glass sample to be detected is completely melted and fills the groove of the crucible; the servo motor is used for adjusting the pressure rod to descend and applying pressure to the gland so that the gland is tightly attached to the groove; detecting the resistance value of the glass melt through an electrochemical workstation;
6) adjusting the pressure rod to rise through a servo motor, removing the pressure on the gland and enabling the pressure rod to contact the upper surface of the gland; continuously adjusting the temperature in the high-temperature furnace, and repeating the step 4) and the step 5) to obtain the resistance values of the glass melt at different temperatures;
7) and substituting the resistance values of the detected glass melt at different temperatures into the following formula, and calculating to obtain the electric conductivity of the glass melt at different temperatures:
in the formula, sigma is the conductivity of the glass melt to be measured, R is the resistance of the glass melt to be measured, L is the distance between two electrode plates, and A is the surface area of the electrode plates.
As a further improvement of the utility model, in the step 5), the heat preservation time is more than or equal to 30 min.
Compared with the prior art, the utility model has the advantages of:
1. the utility model discloses a glass fuse-element high temperature conductivity measuring device is through the inside recess that is used for placing the glass sample that awaits measuring that sets up of crucible to inlay the electrode slice on two inside walls that the recess is relative, the electrode slice passes through the wire and is connected with the electrochemistry workstation, can survey out the resistance value of glass fuse-element under corresponding temperature fast, and then try out the conductivity of glass fuse-element, have the advantage that the principle is simple, maneuverability is strong. Meanwhile, a gland is arranged above the groove, and a closed conductance pool is formed by the groove, the electrode plate and the gland together, so that the glass melt forms a stable conductance pool at high temperature. The glass melt is influenced by temperature and thermal expansion coefficient, is gradually changed from solid to liquid at high temperature, gradually expands in volume, is tightly attached to the groove by the control of the servo motor, discharges redundant glass melt outside the groove, and still stores overflowing glass melt in the crucible, so that the liquid level of the conductivity cell is effectively controlled, and internal components of the high-temperature furnace cannot be damaged due to overflow of the glass melt. Meanwhile, due to the isolation effect of the gland, the length and the cross section area of the glass melt contained in the groove are fixed, and the glass melt and the electrode plate form a closed conductance cell, so that the length and the cross section area of the conductance cell are effectively ensured to be stable all the time, the influence of the viscosity of the glass melt on a test result can be eliminated, and the measurement error is greatly reduced, so that the conductivity of different types of glass melts at different temperatures can be accurately measured, and the method has the advantages of high precision, strong stability, wide application range and the like, and can conveniently and accurately measure the conductivity of the glass melts within the range from the softening point of the glass to 1600 ℃.
2. The utility model discloses a glass fuse-element high temperature conductivity measurement method, put into the recess behind the little sample through making the glass sample that awaits measuring required size, and ensure that the volume of glass fuse-element is greater than the volume of recess, extrude the recess with unnecessary glass fuse-element through the gland, ensure that the glass fuse-element forms stable conductance pond under high temperature, and the recess has played good positioning action, the shape of conductance pond has been ensured, distance between the two electrodes keeps invariable, therefore, the conductivity of glass fuse-element surveyed is only relevant with the glass fuse-element conductivity that obtains of measurement, the liquid level data of artifical reading conductance pond and the detection error that causes have been avoided completely, measuring result's accurate nature has effectively been ensured, and the detection demand of different kinds of glass fuse-elements has been satisfied well. Furthermore, the glass melt overflowing due to thermal expansion at high temperature is stored in the crucible, so that the conductivity of the same glass melt at different temperatures can be continuously measured, the reliability of the detection result is improved, and the detection cost is effectively saved.
Drawings
Fig. 1 is a schematic view of the structural principle of the glass melt high-temperature conductivity measuring device of the present invention.
Illustration of the drawings:
1. a high temperature furnace; 2. a crucible; 21. a groove; 3. a wire; 4. an electrode sheet; 5. a gland; 6. a pressure lever; 7. a support bar; 8. an electrochemical workstation; 9. a screw; 10. a connecting rod.
Detailed Description
The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.
Examples
As shown in FIG. 1, the device for measuring the high temperature conductivity of the glass melt of the present invention comprises: the high-temperature furnace 1 with the furnace temperature control system is characterized in that a high-temperature-resistant and insulating crucible 2 is placed in the high-temperature furnace 1, a groove 21 for placing a glass sample to be measured is formed in the bottom of the inner side of the crucible 2, and the volume of a molten glass melt is larger than that of the groove 21. The glass sample to be measured can be heated by adjusting the heating rate of the high-temperature furnace 1 and the temperature of the hearth, and a glass melt at a corresponding temperature is obtained. Two opposite sides inside the groove 21 are respectively connected with one electrode plate 4, and the two electrode plates 4 are electrically connected with the electrochemical workstation 8. A high-temperature-resistant and insulating gland 5 is arranged above the groove 21, a lifting device is arranged above the gland 5, and the gland 5 is squeezed or loosened through the lifting device to realize the attachment or the loosening of the gland 5 and the groove 21 so as to ensure that a closed conductance pool formed by the groove 21, the electrode plate 4 and the gland 5 is filled with glass melt. It can be understood that the size of the conductivity cell can be designed according to actual requirements, and in the measuring process, the excessive glass melt is extruded out of the groove 21 through the gland 5, so as to ensure that the conductivity cell is filled with the glass melt all the time, and a stable conductivity system is formed.
In this embodiment, the electrode sheet 4 is embedded on the inner side wall of the groove 21, and the surface area of the electrode sheet 4 is equal to the area of the inner side wall of the groove 21. The existence of the groove 21 plays a good positioning role, and ensures that the shape of the conductance cell and the distance between the two electrode plates 4 are kept constant, namely L, A in the formula of conductivity sigma L/RA is not easy to be interfered by the outside and changed, therefore, the conductivity of the measured glass melt is only related to the resistance value R of the measured glass melt, and the accuracy of the test result is greatly improved.
In this embodiment, each electrode plate 4 is connected to the electrochemical workstation 8 through the lead 3, and the resistance value of the glass melt at the corresponding temperature is detected through the electrochemical workstation 8, so that the conductivity of the glass melt at the corresponding temperature can be calculated. Further, in order to improve the detection accuracy, the electrode plate 4 is a platinum electrode plate, the lead 3 is a platinum lead, and the diameter of the platinum lead may be preferably 0.3mm to 1.0 mm.
In this embodiment, through set up the recess 21 that is used for placing the glass sample that awaits measuring specially in crucible 1 inside to set up electrode slice 4 on two inside walls that recess 21 is relative, electrode slice 4 is through being connected with the electrochemistry workstation electricity, can survey out the resistance value of glass melt under corresponding temperature fast, and then try out the conductivity of glass melt, have the advantage that the principle is simple, maneuverability is strong. Meanwhile, a gland 5 is arranged above the groove 21, and the groove 21, the electrode plate 4 and the gland 5 jointly form a closed conductance cell, so that the glass melt forms a stable conductance cell at high temperature. The glass melt is influenced by temperature and thermal expansion coefficient, gradually changes from solid state to liquid state at high temperature, gradually expands in volume, tightly adheres to the groove 21 by the control gland 5 of the lifting device, discharges redundant glass melt outside the groove 21, and the overflowed glass melt is still stored in the crucible 2, so that the liquid level of the electric conductivity cell is effectively controlled, and the internal components of the high-temperature furnace 1 cannot be damaged due to the overflow of the glass melt. Meanwhile, due to the isolation effect of the gland 5, the length and the cross section area of the glass melt contained in the groove 21 are fixed, and the glass melt and the electrode plate 4 form a closed conductance cell, so that the length and the cross section area of the conductance cell are effectively ensured to be stable all the time, the influence of the viscosity of the glass melt on a test result can be eliminated, and the measurement error is greatly reduced, so that the conductivity of different types of glass melts at different temperatures can be accurately measured.
In this embodiment, the lifting device includes a screw 9, a connecting rod 10 and a high temperature resistant and insulating pressure rod 6, one end of the pressure rod 6 is fixedly connected with the connecting rod 10, the other end of the pressure rod 6 passes through the top of the high temperature furnace 1 and is disposed above the gland 5, the connecting rod 10 is connected with the screw 9, and the screw 9 is connected with a servo motor (not shown in the figure) with a pressure sensor. Further, elevating gear still includes bracing piece 7, and the direction that sets up of bracing piece 7 is the same with the direction that sets up of screw rod 9, and under the drive of screw rod 9, connecting rod 10 reciprocates along bracing piece 7. Through the cooperation of bracing piece 7 and screw rod 9, improved the stability that depression bar 6 reciprocated, just also improved the contact stability between gland 5 and the recess 21, improved whole measuring device's stability in use.
In this embodiment, the crucible 2, the pressing cover 5 and the pressing rod 6 are all made of corundum. The corundum has good insulating property and high temperature resistance, small thermal expansion coefficient, and the conductance cell formed at high temperature does not deform, thereby achieving the effects of easily obtained raw materials and high cost performance. In addition, the crucible 2, the gland 5 and the pressure rod 6 used in the embodiment can also be made of high-temperature resistant and insulating materials such as zirconia, so that the measurement of the conductivity of the glass melt at higher temperature can be realized, and the application range of the measuring device in the embodiment is widened.
In this embodiment, the cross section of the gland 5 is circular, and the cross section of the groove 21 is square; the diameter of the gland 5 is smaller than the diameter of the crucible 2 and larger than the diagonal length of the cross section of the groove 21. The groove 21 is arranged in a square structure, which is beneficial to the installation and fixation of the electrode plates 4 and ensures that the distance between the two electrode plates 4 is kept constant. The cross-sectional area of the gland 5 is greater than the cross-sectional area of the groove 21 to ensure that excess glass melt is forced out of the groove 21 and ensure the operational stability of the conductivity cell. It can be understood that in the present embodiment, the gland 5 is in an unstressed state during the temperature rise of the glass melt in the groove 21, and the glass melt in the process overflows the groove 21 due to volume expansion, so that the gland 5 is deflected. After reaching the preset temperature and starting the heat preservation process and before measuring the conductivity, the gland 5 is stressed to press the groove 21. Therefore, in the present invention, the diameter of the gland 5 is large enough to completely cover the upper surface of the groove 21 even if the gland 5 is not located at the center of the groove 21.
Meanwhile, the utility model also provides a glass fuse-element high temperature conductivity measuring method, including following step:
selecting a crucible 2 with the inner diameter of 45mm, the outer diameter of 55mm and the height of 60mm (the upper part of the crucible is 30mm hollowed), wherein the groove 21 is positioned at the center of the crucible 2 and has the size of 25 × 20 × 15mm (length × width × height); the diameter of the gland 5 is 40mm, and the thickness is 4 mm; the size of the platinum electrode plate is 20 × 15 × 0.3mm, and the diameter of the platinum lead wire is 0.5 mm. As can be seen from the above parameters, in the present example, L/A is 83.3m-1。
1) According to the density of the glass prepared (2.63 g/cm)-3) And groove 21 size (25 x 20 x 15mm), 25g of glass samples were weighed, wherein the individual sample particle size was not 5mm in size.
2) The processed glass sample to be detected is placed in a groove 21 at the bottom of the inner side of a crucible 2, two opposite sides of the inner part of the groove 21 are respectively embedded with an electrode plate 4, the two electrode plates 4 are both connected with a lead 3, and a gland 5 is placed on the glass sample to be detected. The gland 5 is positioned right above the groove 21, so that the gland 5 can completely cover the groove 21 after the glass sample to be detected is melted. In the measuring process, a closed conductivity cell is formed by the groove 21, the electrode plate 4 and the gland 5, so that the glass melt forms a stable conductivity cell at high temperature.
3) The crucible 2 is placed in the high temperature furnace 1, the adjusting pressure rod 6 is positioned above the gland 5, and the adjusting pressure rod 6 descends and contacts the upper surface of the gland 5 through a servo motor (not shown in the figure). It will be appreciated that in order to improve the accuracy of the measurement, the pressing rod 6 should be located at the center of the pressing cover 5 as much as possible, and the pressing rod 6 is only pressed against the pressing cover 5, and the pressing cover 5 is not in close contact with the groove 21, so that the glass melt expands and overflows the groove 21 during the temperature rise. Meanwhile, the gland 5 can be positioned through the pressure rod 6, and the gland 5 is prevented from being pushed to the top in the process of heating and expanding of the glass melt, so that the stability of the conductivity cell is further influenced. In the testing process, the pressing effect of the pressing cover 5 on the groove 21 is realized through the pressure applied to the pressing cover 5 by the pressing rod 6, the pressing rod 6 is controlled by a servo motor with a pressure sensor, and whether the pressing cover 5 is tightly attached to the groove 21 or not can be effectively judged through the pressure applied to the pressing rod 6.
4) The lead 3 is connected with the electrochemical workstation 8, the heating program of the high-temperature furnace 1 is set through a furnace temperature control system, and the glass sample to be measured is heated at the speed of 5 ℃/min. It can be understood that in this embodiment, the temperature increase rate in the measurement process does not need to be particularly required, and the temperature increase rule of the high-temperature furnace 1 is satisfied.
5) Continuing to preserve heat for 30min after the temperature reaches 1200 ℃ so as to ensure that the glass sample to be detected is completely melted and fills the groove 21 of the crucible 2; the pressing rod 6 is adjusted to descend through the servo motor, pressure is applied to the pressing cover 5, the pressing cover 5 is enabled to be tightly attached to the groove 21, and redundant glass melt is extruded out of the groove 21, so that a stable conductance pool formed by the glass melt in the groove 21 is ensured; the resistance value of the glass melt detected by the electrochemical workstation 8 was 378.64 Ω. It can be understood that in order to improve the accuracy of the measurement result and ensure that the test of the conductivity of the glass melt is performed at the specified temperature, the temperature of the high-temperature furnace 1 is maintained for no less than 30 minutes after reaching the preset temperature, and then the test of the conductivity of the glass melt is performed to more accurately reflect the resistivity of the glass melt at the temperature.
6) The servo motor is used for adjusting the pressure rod 6 to ascend, removing the pressure on the gland 5 and enabling the pressure rod 6 to contact the upper surface of the gland 5, and it can be understood that the gland 5 is not in close contact with the groove 21 at the moment, so that the glass melt continues to expand and overflows the groove 21 in the process of raising the temperature again; continuing to adjust the temperature in the high temperature furnace 1, repeating the step 4) and the step 5), the resistance values of the glass melt at 1300 ℃ and 1400 ℃ are 100.36 Ω and 12.49 Ω, respectively.
7) And substituting the resistance values of the detected glass melt at different temperatures into the following formula, and calculating to obtain the electric conductivity of the glass melt at different temperatures:
in the formula, σ is the conductivity of the glass melt to be measured, R is the resistance value of the glass melt to be measured, L is the distance between the two electrode plates 4, i.e. the length of the conductance cell, and a is the surface area of the electrode plates 4, i.e. the area of the conductance cell. In the present example, the electrical conductivity σ of the glass melt was 0.22s/m at a temperature of 1200 ℃; when the temperature is 1300 ℃, the electrical conductivity sigma of the glass melt is 0.83 s/m; the glass melt conductivity σ was 6.67s/m at a temperature of 1400 ℃. It can be understood that the conductivity of the glass melt changes along with the rise of the temperature, and the conductivity of the glass melt can be calculated by a formula by measuring the resistance value of the glass melt; the embodiment can test the conductivity of different types of glass melts at different temperatures, the length and the area of the conductivity cell are not easily changed due to the influence of other factors, and the test result has high precision and good reproducibility.
In the embodiment, a glass sample to be measured is made into a small sample with a required size and then is placed in the groove 21, the volume of the glass melt is ensured to be larger than the volume of the groove 21, redundant glass melt is extruded out of the groove 21 through the gland 5, a stable conductance cell is formed by the glass melt at high temperature, the groove 21 plays a good positioning role, the shape of the conductance cell and the distance between two electrodes are ensured to be kept constant, therefore, the conductivity of the measured glass melt is only related to the conductivity of the measured glass melt, the detection error caused by manually reading the liquid level data of the conductance cell is completely avoided, the accuracy of the measurement result is effectively ensured, and the detection requirements of different types of glass melts are well met. Furthermore, the glass melt overflowing due to thermal expansion at high temperature is stored in the crucible 2, so that the conductivity of the same glass melt at different temperatures can be continuously measured, the reliability of the detection result is improved, and the detection cost is effectively saved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make numerous changes and modifications to the disclosed embodiments, or modify equivalent embodiments, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. A glass melt high temperature conductivity measurement device, comprising: the high-temperature furnace comprises a high-temperature furnace (1) with a furnace temperature control system, wherein a high-temperature-resistant and insulating crucible (2) is arranged in the high-temperature furnace (1), a groove (21) for placing a glass sample to be measured is formed in the bottom of the inner side of the crucible (2), and the volume of a molten glass melt is larger than that of the groove (21); two opposite sides inside the groove (21) are respectively connected with an electrode plate (4), and the two electrode plates (4) are electrically connected with the electrochemical workstation (8); recess (21) top is equipped with high temperature resistant and insulating gland (5), gland (5) top is equipped with elevating gear, extrudees or unclamps gland (5) through elevating gear, realizes laminating or the separation of gland (5) and recess (21) to be full of the glass fuse-element in the sealed conductance pond of guaranteeing that recess (21), electrode slice (4) and gland (5) constitute jointly.
2. The device for measuring the high-temperature conductivity of the glass melt according to claim 1, wherein the lifting device comprises a screw (9), a connecting rod (10) and a high-temperature-resistant and insulating pressure rod (6), one end of the pressure rod (6) is fixedly connected with the connecting rod (10), the other end of the pressure rod (6) penetrates through the top of the high-temperature furnace (1) and is arranged above the gland (5), the connecting rod (10) is connected with the screw (9), and the screw (9) is connected with a servo motor.
3. The device for measuring the high-temperature conductivity of the glass melt according to claim 2, wherein the lifting device further comprises a support rod (7), the support rod (7) is arranged in the same direction as the screw (9), and the connecting rod (10) is driven by the screw (9) to move up and down along the support rod (7).
4. The device for measuring the high-temperature conductivity of the glass melt according to claim 2, wherein the crucible (2), the gland (5) and the pressure rod (6) are all made of corundum or zirconia.
5. The glass melt high-temperature conductivity measuring device according to claim 2, wherein the cross section of the gland (5) is circular, and the cross section of the groove (21) is square; the diameter of the gland (5) is smaller than that of the crucible (2) and larger than the diagonal length of the cross section of the groove (21).
6. The device for measuring the high-temperature conductivity of the glass melt according to any one of claims 1 to 5, wherein the electrode sheet (4) is embedded on the inner side wall of the groove (21), and the surface area of the electrode sheet (4) is equal to the area of the inner side wall of the groove (21).
7. The glass melt high-temperature conductivity measuring device according to claim 6, wherein each electrode sheet (4) is connected to the electrochemical workstation (8) through a lead (3).
8. The device for measuring the high-temperature conductivity of the glass melt according to claim 7, wherein the electrode sheet (4) is a platinum electrode sheet, and the lead (3) is a platinum lead.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112946028A (en) * | 2021-03-31 | 2021-06-11 | 中国人民解放军63653部队 | Device and method for measuring high-temperature conductivity of glass melt |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946028A (en) * | 2021-03-31 | 2021-06-11 | 中国人民解放军63653部队 | Device and method for measuring high-temperature conductivity of glass melt |
| CN112946028B (en) * | 2021-03-31 | 2024-12-03 | 中国人民解放军63653部队 | A device and method for measuring high temperature conductivity of molten glass |
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