CN109916953A - Method for determination of thermal conductivity of void-like thermal insulation materials under ultra-high temperature vacuum or inert atmosphere - Google Patents
Method for determination of thermal conductivity of void-like thermal insulation materials under ultra-high temperature vacuum or inert atmosphere Download PDFInfo
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- CN109916953A CN109916953A CN201910371006.2A CN201910371006A CN109916953A CN 109916953 A CN109916953 A CN 109916953A CN 201910371006 A CN201910371006 A CN 201910371006A CN 109916953 A CN109916953 A CN 109916953A
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Abstract
This application provides a kind of measuring methods of the thermal coefficient of gap shape heat-barrier material under superhigh temperature vacuum or inert atmosphere, in the furnace chamber of vacuum furnace, gap shape heat-barrier material, upper insulation cover and the lower insulation cover of oval tubular constitute sealed thermal insulating cylinder, and heater is located in sealed thermal insulating cylinder；When the temperature of thermal field is stablized in setting value, calculate rate of heat flow=transformer output power-(rate of heat flow+lower insulation cover rate of heat flow of upper insulation cover) of measured body, then further according to Fourier law and its stable state heat flow method, Extrapolation goes out thermal coefficient of the gap shape heat-barrier material under high-temperature vacuum or inert atmosphere；Thermal coefficient of the gap shape heat-barrier material in 500 DEG C~2500 DEG C when arbitrary temp can be measured, and furnace atmosphere can be controlled flexibly；The size controlled range of measured body is big: internal diameter is 200~550mm of diameter, and outer diameter is 300~650mm of diameter, and length is 1200mm (fixed length).
Description
Technical field
The present invention relates to heat-barrier material technical fields, and in particular under a kind of superhigh temperature vacuum or inert atmosphere gap shape every
The measuring method of the thermal coefficient of hot material.
Background technique
In recent years, along with the fast of the industries such as aerospace, semiconductor, solar energy, optical fiber, heat treatment, ceramics, sapphire
Exhibition is hailed, and the substantially growth of the industries such as the rubbish expedited the emergence of by environmental requirement or gas incinerator, heat-barrier material (or make
Heat preserving and insulating material) importance just further show.In order to make heat-barrier material at 1000 DEG C or more, even 2500 DEG C super
It perfect can also be used in high-temperature vacuum or inert atmosphere, thus the research of the heat-proof quality of heat-barrier material is also just become more to compel
It cuts.
Thermal coefficient (being separately referred to as pyroconductivity) is an important indicator for judging the heat-proof quality superiority and inferiority of heat-barrier material.
But under superhigh temperature vacuum or inert atmosphere, measurement thermal coefficient is very difficult thing.Most detections both at home and abroad at present
Mechanism can only test 1000 DEG C of thermal coefficients below.According to investigations, though there be the thermally conductive of 2000 DEG C of test or more in German Nai Chi company
The equipment of coefficient, but there are strict requirements for its size to test sample, can only test diameter 12.65mm × 3mm sample below,
It is basic not applicable if for gap shape heat-barrier material (such as carbon fiber, alumina silicate fibre etc.), so cannot also meet major part
High-end gap shape heat-barrier material, the especially survey of the thermal coefficient of carbon fiber heat insulation material prevailing on the market at present
Examination requires.
Therefore, a kind of measurement of the thermal coefficient of gap shape heat-barrier material under superhigh temperature vacuum or inert atmosphere how is developed
Method, and the measuring method may be implemented arbitrary temp within the scope of 500 DEG C~2500 DEG C and test, and the measuring method can test
The sample of big specification, is those skilled in the art's technical problem urgently to be solved.
Summary of the invention
The embodiment of the present invention is designed to provide gap shape heat-barrier material under a kind of superhigh temperature vacuum or inert atmosphere
The measuring method of thermal coefficient.
In order to solve the above technical problems, technical solution provided by the invention are as follows:
The measuring method of the thermal coefficient of gap shape heat-barrier material, the measurement under a kind of superhigh temperature vacuum or inert atmosphere
Method uses stable state heat flow method, and the shape of the gap shape heat-barrier material is the oval tubular of length direction open at both ends；
The measuring method includes the steps that next coming in order carry out:
1) prepare measurement device: being put into the furnace chamber of vacuum furnace using the gap shape heat-barrier material as measured body,
The upper open and lower open mouth at the length direction both ends of the gap shape heat-barrier material of oval tubular is respectively by upper insulation cover under
Insulation cover capping, gap shape heat-barrier material, upper insulation cover and the lower insulation cover of oval tubular constitute one and include the close of cavity
Close heat-preservation cylinder；
It is provided with the heater for fever in the sealed thermal insulating cylinder, the inner end of the heater and copper electrode is electrically connected
It connects, the copper electrode penetrates the furnace shell of insulation cover and vacuum furnace, and the outer end of the copper electrode is exposed at vacuum furnace
It is electrically connected except furnace shell with transformer；
Vacuum orifice is provided on the vacuum furnace, the vacuum orifice is connected to the air inlet of vacuum pump；
Inert gas entrance is provided on the vacuum furnace in the furnace chamber for changing the vacuum furnace
Atmosphere；
2) calculation formula:
In formula:
λ is thermal coefficient, and unit is W/ (mK)；
Φ is rate of heat flow=transformer output power-(rate of heat flow+lower insulation cover heat of upper insulation cover of measured body
Flow rate), unit W；
R1 is the inside radius of measured body, unit m；
R2 is the outer radius of measured body, unit m；
L is the length of measured body, unit m；
T1 is the hull-skin temperature of the heater under lower state, unit K；
T2 is the hull-skin temperature of the measured body under lower state, unit K；
3) heater is allowed to start to generate heat to heater energization, when the temperature of the thermal field in the furnace chamber in vacuum furnace is stablized
Indicate that thermal field is in lower state at this time in setting value, the output power P of transformer when state of statistical control, and according to upper heat preservation
The rate of heat flow of upper insulation cover when the known parameters of lid calculate stable state, and stable state is calculated according to the known parameters of lower insulation cover
When lower insulation cover rate of heat flow, while with temperature measuring device measure lower state under heater hull-skin temperature T1, and use
Temperature measuring device measures the hull-skin temperature T2 of the measured body under lower state, brings the formula in step 2) into, is computed to obtain excess of export
The thermal coefficient λ of gap shape heat-barrier material under high-temperature vacuum or inert atmosphere.
Preferably, in step 1), the upper insulation cover and lower insulation cover are Carbon fiber thermal insulation felt.
Preferably, in step 3), the hull-skin temperature T1 of the heater under lower state, stone are measured with infrared thermometer
The inner end of black pipe is inserted into the through-hole on the barrel of the gap shape heat-barrier material of oval tubular, and the outer end insertion of the graphite-pipe
In peep hole on the furnace shell of the vacuum furnace, observation window is provided in the peep hole to survey for infrared thermometer
Measure the hull-skin temperature T1 of the heater under lower state.
Preferably, in step 3), with the hull-skin temperature T2 of the measured body under iridium-rhodium alloy thermocouple measurement lower state,
The iridium-rhodium alloy thermocouple is passed through from the through-hole on the furnace shell of vacuum furnace, the interior termination of the iridium-rhodium alloy thermocouple
Touch the outer surface of the barrel of the gap shape heat-barrier material of oval tubular.
This application provides a kind of measurements of the thermal coefficient of gap shape heat-barrier material under superhigh temperature vacuum or inert atmosphere
Method, the measuring method are length using the stable state heat flow method for following Fourier law, the shape of the gap shape heat-barrier material
Spend the oval tubular of direction open at both ends；
In the furnace chamber of vacuum furnace, the upper of the length direction both ends of the gap shape heat-barrier material of oval tubular is opened
Mouthful covered respectively by upper insulation cover and lower insulation cover with lower open mouth, the gap shape heat-barrier material of oval tubular, upper insulation cover and
Lower insulation cover constitutes the sealed thermal insulating cylinder for including cavity, for being located in the sealed thermal insulating cylinder in the heater of fever；
Heater is allowed to start to generate heat to heater energization, when the temperature of the thermal field in the furnace chamber in vacuum furnace is stablized
Indicate that thermal field is in lower state at this time when setting value, the output power P of transformer when state of statistical control, and according to upper insulation cover
Upper insulation cover of known parameters when calculating stable state rate of heat flow, and when calculating stable state according to the known parameters of lower insulation cover
The rate of heat flow of lower insulation cover calculate the hot-fluid of tested gap shape heat-barrier material on this basis according to law of conservation of energy
Rate=transformer output power-(rate of heat flow+lower insulation cover rate of heat flow of upper insulation cover), it is then fixed further according to Fourier
Rule and its stable state heat flow method, the rate of heat flow of shape heat-barrier material in gap calculated as known quantity Extrapolation go out gap shape every
Thermal coefficient of the hot material under superhigh temperature vacuum or inert atmosphere；
The temperature of thermal field (low temperature, medium temperature, high temperature or superhigh temperature) in furnace chamber, change vacuum by changing vacuum furnace
Vacuum degree size in the furnace chamber of heating furnace, inert ambient environment (argon gas, nitrogen or the helium in the furnace chamber of change vacuum furnace
The atmosphere such as gas), thermal coefficient of the gap shape heat-barrier material under different temperatures, vacuum or inert atmosphere can be measured；
By verification experimental verification, the measuring method of thermal coefficient provided by the invention can measure gap shape heat-barrier material and exist
Thermal coefficient within the scope of 500 DEG C~2500 DEG C in the working environment of arbitrary temp, and furnace atmosphere can be controlled flexibly, or true
Sky or inert atmosphere；In addition, the size controlled range of measured body is big: internal diameter is diameter 200mm~diameter 550mm, and outer diameter is straight
Diameter 300mm~diameter 650mm, length is 1200mm (fixed length), since test size is bigger, sky of the present invention for puffy
Gap shape heat-barrier material is especially suitable.
Detailed description of the invention
Fig. 1 is that gap shape heat-barrier material is led under a kind of superhigh temperature vacuum that the embodiment of the present invention provides or inert atmosphere
The operation principle schematic diagram of the measuring method of hot coefficient；
Fig. 2 is the thermal coefficient of gap shape heat-barrier material under a kind of superhigh temperature vacuum provided by the present application or inert atmosphere
The experimental result data figure of the Precision Experiment in embodiment 1 in measuring method；
Fig. 3 is the thermal coefficient of gap shape heat-barrier material under a kind of superhigh temperature vacuum provided by the present application or inert atmosphere
The experimental result data figure of the degree of accuracy experiment in embodiment 2 in measuring method.
In figure: 1 copper electrode, 2 vacuum orifices, 3 furnace shells, insulation cover on 4,5 gap shape heat-barrier materials, 6 heaters, 7 graphite
Pipe, 8 observation windows, 9 iridium-rhodium alloy thermocouples, 10 lower insulation covers, 11 inert gas entrances.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " axial direction ", " radial direction ", " longitudinal direction ", " transverse direction ",
" length ", " width ", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outside", " clockwise ", " inverse
The orientation or positional relationship of the instructions such as hour hands ", "vertical", "horizontal", "inner", "outside" is orientation based on the figure or position
Relationship, the orientation or positional relationship in foregoing description are merely for convenience of description of the present invention and simplification of the description, rather than indicate or
It implies that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as
Limitation of the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower",
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is in the surface and oblique upper of second feature, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign includes fisrt feature in the underface and obliquely downward of second feature under the second feature " below ", " below " and " below ", or only
Only indicate that first feature horizontal height is less than second feature.
Referring to Fig.1-3, Fig. 1 be under a kind of superhigh temperature vacuum that the embodiment of the present invention provides or inert atmosphere gap shape every
The operation principle schematic diagram of the measuring method of the thermal coefficient of hot material；In Fig. 1: copper electrode 1, vacuum orifice 2, vacuum furnace
Furnace shell 3 (the water cooled double-layered furnace shell of inner clip waterway), upper insulation cover 4, the gap shape heat-barrier material 5 of tested oval tubular,
Heater 6, graphite-pipe 7, observation window 8, iridium-rhodium alloy thermocouple 9, lower insulation cover 10, inert gas entrance 11.
This application provides a kind of measurements of the thermal coefficient of gap shape heat-barrier material under superhigh temperature vacuum or inert atmosphere
Method, the measuring method use stable state heat flow method, and the shape of the gap shape heat-barrier material 5 is length direction open at both ends
Oval tubular；
The measuring method includes the steps that next coming in order carry out:
1) prepare measurement device: the gap shape heat-barrier material 5 be put into the furnace chamber of vacuum furnace as measured body,
The length direction both ends of the gap shape heat-barrier material 5 of oval tubular it is upper it is open with lower open mouth respectively by upper insulation cover 4 with
Lower insulation cover 10 covers, and gap shape heat-barrier material 5, upper insulation cover 4 and the lower insulation cover 10 of oval tubular constitute one and include
The sealed thermal insulating cylinder of cavity；
The heater 6 for fever, the inner end electricity of the heater 6 and copper electrode 1 are provided in the sealed thermal insulating cylinder
Connection, the copper electrode 1 penetrate the furnace shell 3 of insulation cover 4 Yu vacuum furnace, and the outer end of the copper electrode 1 is exposed at vacuum and adds
It is electrically connected except the furnace shell 3 of hot stove with transformer；
Vacuum orifice 2 is provided on the vacuum furnace, the vacuum orifice 2 is connected to the air inlet of vacuum pump；
Inert gas entrance 11 is provided on the vacuum furnace in the furnace chamber for changing the vacuum furnace
Atmosphere；
3) calculation formula:
In formula:
λ is thermal coefficient, and unit is W/ (mK)；
Φ is rate of heat flow=transformer output power-(rate of heat flow+lower insulation cover 10 of upper insulation cover 4 of measured body
Rate of heat flow), unit W；
R1 is the inside radius of measured body, unit m；
R2 is the outer radius of measured body, unit m；
L is the length of measured body, unit m；
T1 is the hull-skin temperature of the heater 6 under lower state, unit K；
T2 is the hull-skin temperature of the measured body under lower state, unit K；
3) heater 6 is allowed to start to generate heat to the energization of heater 6, when the temperature of the thermal field in the furnace chamber in vacuum furnace is steady
Indicate that thermal field is in lower state at this time when being scheduled on setting value, the output power P of transformer when state of statistical control, and according to upper guarantor
The rate of heat flow of upper insulation cover 4 when the known parameters of warm lid 4 calculate stable state, and calculated according to the known parameters of lower insulation cover 10
The rate of heat flow of lower insulation cover 10 when stable state out, at the same with temperature measuring device measure lower state under heater 6 outer surface temperature
T1 is spent, and measures the hull-skin temperature T2 of the measured body under lower state with temperature measuring device, the formula in step 2) is brought into, through counting
Calculate the thermal coefficient λ for obtaining gap shape heat-barrier material 5 under superhigh temperature vacuum or inert atmosphere.
In one embodiment of the application, it is further preferred that in step 1), the upper insulation cover 4 and lower insulation cover
10 be Carbon fiber thermal insulation felt.
In one embodiment of the application, it is further preferred that measuring stable state shape with infrared thermometer in step 3)
The barrel of the gap shape heat-barrier material 5 of oval tubular is inserted into the hull-skin temperature T1 of heater 6 under state, the inner end of graphite-pipe 7
On through-hole in, and the outer end of the graphite-pipe 7 is inserted into the peep hole on the furnace shell 3 of the vacuum furnace, the observation
Observation window 8 is provided in hole to measure the hull-skin temperature T1 of the heater 6 under lower state for infrared thermometer.
In one embodiment of the application, it is further preferred that being measured surely in step 3) with iridium-rhodium alloy thermocouple 9
The hull-skin temperature T2 of measured body under state state, the iridium-rhodium alloy thermocouple 9 is from the through-hole on the furnace shell 3 of vacuum furnace
In pass through, the outer surface of the barrel of the gap shape heat-barrier material 5 of the interior end in contact long cylinder shape of the iridium-rhodium alloy thermocouple 9.
In the application, the preferred high purity graphite straight-tube shape heater of heater 6, the graphite heater makes temperature of thermal field in furnace
Even under vacuum conditions highest also up to 2500 DEG C.
In the application, upper insulation cover 4 and the preferred Carbon fiber thermal insulation felt of lower insulation cover 10 can be in vacuum or inert atmosphere
Bear 3000 DEG C of superhigh temperature.In the application step 3), upper heat preservation when stable state is calculated according to the known parameters of upper insulation cover 4
The rate of heat flow of lid 4, and the rate of heat flow of the lower insulation cover 10 when calculating according to the known parameters of lower insulation cover 10 stable state, herein on
Insulation cover 4 and lower insulation cover 10 are the standard components in this measuring method, and upper insulation cover 4 and lower heat preservation have been known in measurement before starting
The Thermal Parameter of lid 10, thermal coefficient, thickness, length, diameter including upper insulation cover 4 and lower insulation cover 10 etc., upper guarantor
The known Thermal Parameter of warm lid 4 and lower insulation cover 10 is by general in the prior art measuring method and its measurement device
Measurement obtains, the shape of the two be mostly it is discoid, shape is fairly simple, compared with existing measuring method and its measurement device
Good measurement, therefore, i.e. the working principle of this measuring method can be understood as being led with insulation cover 4 with known to lower insulation cover 10
Hot coefficient goes to measure the unknown thermal coefficient of the gap shape heat-barrier material 5 of oval tubular, i.e., with insulation cover 4 and lower guarantor
Warm the two standard components of lid 10 remove the thermal coefficient of measurement gap shape heat-barrier material 5.
In the application, above-mentioned infrared thermometer, it is 500 DEG C~3500 DEG C that temperature, which can survey range, and temperature measurement accuracy is high,
The application be can satisfy to the needs of thermal field superhigh temperature and temperature measurement accuracy.Infrared thermometer is by issuing to measured body
Infrared ray electric magnetic wave analyzed, obtain the temperature of measured body, be a kind of contactless temp measuring method, have safety can
It leans on, the features such as corresponding time is fast, long service life, specifically used method is infrared thermometer to be aligned focus and fix,
The infrared ray electric magnetic wave of measured body can be transmitted to observation window 8 by graphite-pipe 7, and infrared thermometer can be surveyed by observation window 8
Determine the hull-skin temperature T1 of heater 6.
In the application, in step 3), the hull-skin temperature of the measured body under lower state is measured with iridium-rhodium alloy thermocouple 9
T2, thermocouple can measure the temperature of tested external surface, belong to contact type measurement, and what the present invention selected is iridium-rhodium alloy thermoelectricity
Even 9, it is current thermocouple most resistant to high temperature in the world, the maximum temperature of measurement is up to 2100 DEG C, and measuring accuracy is high, can grow
It uses long.
In the application, inert gas entrance 11 is provided on the vacuum furnace for changing the vacuum furnace
Furnace chamber in inert atmosphere；Vacuum orifice 2 and inert gas entrance 11 can change the atmosphere in furnace chamber, such as vacuum as needed
The atmosphere such as state or argon gas, nitrogen, helium, to meet test request, the wherein final vacuum in the furnace chamber of vacuum furnace
Up to 0.1Pa.
In the application, the transformer output current outside furnace gives the certain voltage of heater 6 by copper electrode 1 to copper electrode 1
And electric current, make 6 persistent fever of heater.After the temperature of thermal field in the furnace chamber of vacuum furnace reaches setting value, pass through adjusting
The variation of size of current, making the temperature in thermal field stablize the temperature in setting value, thermal field to stablize in setting value is to indicate at this time
Thermal field is in lower state.Under the premise of temperature of thermal field is constant, the thermal coefficient of stable state heat flow method test measured body can be used.
Upper insulation cover 4 and lower insulation cover 10 are due to using standard material, the known parameters that can be provided by manufacturer, calculated in advance
Rate of heat flow of the two in each temperature out.
For a further understanding of the present invention, below with reference to embodiment to a kind of superhigh temperature vacuum provided by the invention or inertia
The measuring method of the thermal coefficient of gap shape heat-barrier material is described in detail under atmosphere, and protection scope of the present invention is not by following
The limitation of embodiment.
Embodiment 1
Precision:
Take the 5 (length for length direction open at both ends of gap shape heat-barrier material with the fine base carbon fibre production of polypropylene
It is cylinder-shaped), it is detected using same test method by 4 repetitions, obtains Fig. 2, it is seen that deviation is smaller, this measuring method
Precision is higher.
Embodiment 2
Accuracy:
The gap shape heat-barrier material 5 (the oval tubular of length direction open at both ends) for buying external finished product, is mentioned by it
The known performance supplemental characteristic of confession, first extrapolates the theoretical value of its thermal coefficient, then according to by measuring method pair of the invention
Its material object is tested, and obtains Fig. 3, it is seen that two curves coincide substantially, it is seen that the accuracy of this measuring method is higher.
The method and apparatus of the not detailed description of the present invention are the prior art, are repeated no more.
Principle and implementation of the present invention are described for specific embodiment used herein, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for art personnel, these change
It is also fallen within the protection scope of the claims of the present invention into modification.
Claims (4)
1. the measuring method of the thermal coefficient of gap shape heat-barrier material, feature exist under a kind of superhigh temperature vacuum or inert atmosphere
In the measuring method uses stable state heat flow method, and the shape of the gap shape heat-barrier material is length direction open at both ends
Oval tubular；
The measuring method includes the steps that next coming in order carry out:
1) prepare measurement device: being put into the furnace chamber of vacuum furnace using the gap shape heat-barrier material as measured body, it is oval
The upper open and lower open mouth at the length direction both ends of the gap shape heat-barrier material of tubular is respectively by upper insulation cover and lower heat preservation
Lid capping, gap shape heat-barrier material, upper insulation cover and the lower insulation cover of oval tubular constitute the closed guarantor for including cavity
Warm cylinder；
The heater for fever is provided in the sealed thermal insulating cylinder, the heater is electrically connected with the inner end of copper electrode, institute
State the furnace shell that copper electrode penetrates insulation cover and vacuum furnace, the outer end of the copper electrode be exposed at vacuum furnace furnace shell it
It is electrically connected outside with transformer；
Vacuum orifice is provided on the vacuum furnace, the vacuum orifice is connected to the air inlet of vacuum pump；
Inert gas entrance is provided on the vacuum furnace with the atmosphere in the furnace chamber for changing the vacuum furnace；
2) calculation formula:
In formula:
λ is thermal coefficient, and unit is W/ (mK)；
Φ is rate of heat flow=transformer output power-(rate of heat flow+lower insulation cover hot-fluid of upper insulation cover of measured body
Rate), unit W；
R1 is the inside radius of measured body, unit m；
R2 is the outer radius of measured body, unit m；
L is the length of measured body, unit m；
T1 is the hull-skin temperature of the heater under lower state, unit K；
T2 is the hull-skin temperature of the measured body under lower state, unit K；
3) heater is allowed to start to generate heat to heater energization, when the temperature stabilization of the thermal field in the furnace chamber in vacuum furnace is being set
Indicate that thermal field is in lower state at this time when definite value, the output power P of transformer when state of statistical control, and according to upper insulation cover
The rate of heat flow of upper insulation cover when known parameters calculate stable state, and when calculating stable state according to the known parameters of lower insulation cover
The rate of heat flow of lower insulation cover, while the hull-skin temperature T1 of the heater under lower state is measured with temperature measuring device, and use thermometric
The hull-skin temperature T2 of measured body under apparatus measures lower state, brings the formula in step 2) into, is computed and obtains superhigh temperature
The thermal coefficient λ of gap shape heat-barrier material under vacuum or inert atmosphere.
2. measuring method according to claim 1, which is characterized in that in step 1), the upper insulation cover and lower insulation cover
It is Carbon fiber thermal insulation felt.
3. measuring method according to claim 1, which is characterized in that in step 3), measure stable state with infrared thermometer
The hull-skin temperature T1 of heater under state, the inner end of graphite-pipe are inserted on the barrel of gap shape heat-barrier material of oval tubular
Through-hole in, and the outer end of the graphite-pipe is inserted into the peep hole on the furnace shell of the vacuum furnace, in the peep hole
Observation window is provided with to measure the hull-skin temperature T1 of the heater under lower state for infrared thermometer.
4. measuring method according to claim 1, which is characterized in that steady with iridium-rhodium alloy thermocouple measurement in step 3)
The hull-skin temperature T2 of measured body under state state, the iridium-rhodium alloy thermocouple is from the through-hole on the furnace shell of vacuum furnace
It passes through, the outer surface of the barrel of the gap shape heat-barrier material of the interior end in contact long cylinder shape of the iridium-rhodium alloy thermocouple.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111595901A (en) * | 2020-06-10 | 2020-08-28 | 北京科技大学 | Device and method for measuring heat conductivity coefficient of refractory material |
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