CN110467455B - Preparation method of positive temperature coefficient thermistor for electric automobile - Google Patents
Preparation method of positive temperature coefficient thermistor for electric automobile Download PDFInfo
- Publication number
- CN110467455B CN110467455B CN201910770873.3A CN201910770873A CN110467455B CN 110467455 B CN110467455 B CN 110467455B CN 201910770873 A CN201910770873 A CN 201910770873A CN 110467455 B CN110467455 B CN 110467455B
- Authority
- CN
- China
- Prior art keywords
- parts
- raw materials
- thermistor
- added
- binder solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 11
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002113 barium titanate Inorganic materials 0.000 claims abstract description 6
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims abstract description 5
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Inorganic materials O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 claims abstract description 5
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000003854 Surface Print Methods 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000002019 doping agent Substances 0.000 claims abstract description 3
- 238000010304 firing Methods 0.000 claims abstract description 3
- 239000011521 glass Substances 0.000 claims abstract description 3
- 239000012535 impurity Substances 0.000 claims abstract description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 3
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000005245 sintering Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000000498 ball milling Methods 0.000 description 2
- WEUCVIBPSSMHJG-UHFFFAOYSA-N calcium titanate Chemical compound [O-2].[O-2].[O-2].[Ca+2].[Ti+4] WEUCVIBPSSMHJG-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010955 niobium Substances 0.000 description 2
- 229910003781 PbTiO3 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
- C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
- C04B35/465—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates
- C04B35/468—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on alkaline earth metal titanates based on barium titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
- C04B41/5116—Ag or Au
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/88—Metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/02—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient
- H01C7/022—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances
- H01C7/023—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having positive temperature coefficient mainly consisting of non-metallic substances containing oxides or oxidic compounds, e.g. ferrites
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
- C04B2235/3234—Titanates, not containing zirconia
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
- C04B2235/3234—Titanates, not containing zirconia
- C04B2235/3236—Alkaline earth titanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, or oxide-forming salts thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
- C04B2235/3267—MnO2
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/36—Glass starting materials for making ceramics, e.g. silica glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/444—Halide containing anions, e.g. bromide, iodate, chlorite
- C04B2235/445—Fluoride containing anions, e.g. fluosilicate
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Thermistors And Varistors (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a preparation method of a positive temperature coefficient thermistor for an electric automobile, which solves the problem that the reliability and safety of the existing resistor need to be improved. The technical scheme is that the raw materials in the following molar ratio: the material is prepared by using 61-82 parts of barium titanate, 16-35 parts of lead titanate and 2-4 parts of calcium titanate as main components, and also containing 0.15-0.3 part of niobium pentoxide as a semiconducting element, 0.03-0.05 part of modified dopant magnesium fluoride, 1.5-2.5 parts of silicon oxide as a glass component, 1.0-1.2 parts of titanium oxide and 0.05-0.07 part of manganese dioxide as an acceptor impurity through the following steps: the raw materials are sent into a ball mill, added with water and uniformly mixed, added with a binder solution and continuously and uniformly mixed, then granulated, tabletted, formed and sintered to obtain semiconductive ceramics, and then the surface printing and silver-infiltrated electrode firing are carried out to obtain the thermistor. The invention has simple process, high reliability and stability and strong capability of resisting severe environment.
Description
Technical Field
The invention relates to a preparation method of a thermistor, in particular to a preparation method of a positive temperature coefficient thermistor for an electric automobile.
Background
With the improvement of the worldwide awareness of energy conservation and emission reduction, the new energy electric automobile becomes one of the main directions of future automobile development, and with the coming of relevant policies of national new energy electric automobiles, the new energy electric automobile will be one of the main directions of future automobile development, and the PTC heater adopts a mode of heating after power is plugged, so that the PTC heater is the best selection device for heating in oil hybrid electric vehicles and pure electric vehicles and is also necessary equipment for defrosting the electric automobiles. At present, batteries are selected for electric automobiles, and the batteries are all used at higher direct current voltage, even reach the use requirement of direct current more than 700V. Meanwhile, in consideration of safety, the heating part is sealed in the Al tube, organic glue is also needed in the manufacturing process, and the heating thermistor chip is in a state of extreme high temperature and extremely low oxygen pressure when being electrified, so that the requirement on the reliability of the thermistor is extremely high. The safety of the thermistor chip produced at present in China is not satisfactory.
Disclosure of Invention
The invention aims to solve the technical problems and provides a preparation method of a positive temperature coefficient thermistor for an electric automobile, which has the advantages of simple process, high reliability and stability and strong severe environment resistance.
The preparation method adopts the following raw materials in parts by mole: the barium titanate powder is prepared by taking 61-82 parts of barium titanate, 16-35 parts of lead titanate and 2-4 parts of calcium titanate as main components (the total of the three is 100 parts), and also contains semiconducting elements such as 0.15-0.3 part of niobium pentoxide, 0.03-0.05 part of modified dopant magnesium fluoride, 1.5-2.5 parts of glass component silicon oxide, 1.0-1.2 parts of titanium oxide and 0.05-0.07 part of acceptor impurity manganese dioxide through the following steps: the raw materials are sent into a ball mill, added with water and uniformly mixed, added with a binder solution and continuously and uniformly mixed, then granulated, tabletted, formed and sintered to obtain semiconductive ceramics, and then the surface printing and silver-infiltrated electrode firing are carried out to obtain the thermistor.
The adhesive solution is a PVA adhesive solution with the concentration of 8%, and the addition amount of the PVA adhesive solution is 15% of the total weight of the raw materials. The sintering temperature is 1300-1330 ℃, and the sintering time is 20-40 min.
Aiming at the problems in the background art, the inventor carries out deep research on the material of the positive temperature coefficient thermistor, finds out the reason causing poor safety because the grain size is not uniform, and the product structure is not dense, so that the product is easy to be influenced by atmosphere and fails, therefore, the inventor adds MgF2 in the raw material for modification doping, replaces O element with F, and replaces Ba element with Mg in multiple positions, so that the manufactured thermistor has fine grains, stable products and strong capability of resisting severe environment; meanwhile, a small amount of Mg element is used as an acceptor to jointly stabilize a crystal boundary with donor Nb element in the mixture ratio, and crystal grain boundary oxygen is solidified more, so that the oxygen element is difficult to migrate, the voltage effect of the product is reduced, the product is ensured to be stable under high voltage and severe environment, and the PTC effect of the thermistor can be lost by too much and too little Nb element, so that the two elements are matched. However, excessive MgF2 is doped, and Mg may enter Ti positions to cause abnormal grain growth deterioration, so the addition amount of the MgF2 is strictly controlled to be 0.03-0.05 mol fraction.
The invention has simple process, low production cost, high reliability and stability and strong capability of resisting severe environment, and is particularly suitable for being stably used on an automobile heater.
Detailed Description
Example (b):
feeding barium titanate (BaTiO3), lead titanate (PbTiO3), calcium titanate (CaTiO3), niobium pentoxide (Nb2O5), magnesium fluoride (MgF2), silicon oxide (SiO2), titanium oxide (TiO2) and manganese dioxide (MnO2) into a ball mill, adding water, uniformly mixing, adding a binder solution (the addition amount of the PVA binder solution is 15% of the total weight of the raw materials), continuously mixing uniformly, wherein the ball milling conditions are as follows: material preparation: ball: water is 1:3:3, and the total ball milling time is 8 hours; and then granulating the mixture, tabletting and forming by a tabletting machine, sintering to obtain the semiconductive ceramic, wherein the sintering temperature is 1300-1330 ℃, the sintering time is 30min, and then carrying out surface printing and silver electrode sintering on the semiconductive ceramic to obtain the thermistor. The raw material ratios of examples 1 to 3 and comparative examples 1 to 3 according to this method are shown in table 1,
the chip size of the thermistor prepared in each example was 24X 15X 3.5mm, and each sample was tested as follows: putting 6 PTC chips on the electrode plate, coating silica gel, curing at 250 ℃, winding insulating yellow paper, penetrating into an Al tube, testing the withstand voltage in an air environment (the voltage is tested at 500V directly, after the pressure is maintained for 1h, the pressure is maintained for 1h every time the voltage is increased by 50V) and testing the withstand voltage in a vacuum environment (the testing conditions are the same as the air).
TABLE 1
Claims (3)
1. The preparation method of the positive temperature coefficient thermistor for the electric automobile is characterized by comprising the following raw materials in parts by mole: the material is prepared by using 61-82 parts of barium titanate, 16-35 parts of lead titanate and 2-4 parts of calcium titanate as main components, and also containing 0.15-0.3 part of niobium pentoxide as a semiconducting element, 0.03-0.05 part of modified dopant magnesium fluoride, 1.5-2.5 parts of silicon oxide as a glass component, 1.0-1.2 parts of titanium oxide and 0.05-0.07 part of manganese dioxide as an acceptor impurity through the following steps: the raw materials are sent into a ball mill, added with water and uniformly mixed, added with a binder solution and continuously and uniformly mixed, then granulated, tabletted, formed and sintered to obtain semiconductive ceramics, and then the surface printing and silver-infiltrated electrode firing are carried out to obtain the thermistor.
2. The method of claim 1, wherein the binder solution is a PVA binder solution with a concentration of 8%, and the amount of the PVA binder solution added is 15% of the total weight of the raw materials.
3. The method for preparing the positive temperature coefficient thermistor for the electric vehicle as claimed in claim 1 or 2, wherein the sintering temperature is 1300 to 1330 ℃, and the sintering time is 20 to 40 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770873.3A CN110467455B (en) | 2019-08-20 | 2019-08-20 | Preparation method of positive temperature coefficient thermistor for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770873.3A CN110467455B (en) | 2019-08-20 | 2019-08-20 | Preparation method of positive temperature coefficient thermistor for electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110467455A CN110467455A (en) | 2019-11-19 |
| CN110467455B true CN110467455B (en) | 2022-02-08 |
Family
ID=68513074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910770873.3A Active CN110467455B (en) | 2019-08-20 | 2019-08-20 | Preparation method of positive temperature coefficient thermistor for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110467455B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112802647B (en) * | 2021-01-13 | 2021-11-23 | 江苏新林芝电子科技股份有限公司 | Positive temperature coefficient ceramic thermistor element with strong reducing atmosphere resistance and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237949A (en) * | 1996-11-20 | 1999-12-08 | 株式会社村田制作所 | Barium titanate semiconductor ceramic composition |
| EP1518841A1 (en) * | 2003-09-24 | 2005-03-30 | Yageo Corporation | Ultralow firing temperature compensating ceramic composition for pure silver eletrode, sintering flux and laminated ceramic element obtained therefrom |
| CN101891464A (en) * | 2010-06-29 | 2010-11-24 | 章慧 | High temperature thermistor and manufacturing method thereof |
| CN102649641A (en) * | 2012-05-15 | 2012-08-29 | 丹东国通电子元件有限公司 | Ceramic positive temperature coefficient (PTC) thermistor of variable-frequency air conditioner starter and manufacturing method thereof |
| CN103839637A (en) * | 2014-03-13 | 2014-06-04 | 孝感华工高理电子有限公司 | Positive temperature coefficient thermistor for car heater and manufacturing method thereof |
| CN107056279A (en) * | 2017-03-23 | 2017-08-18 | 汕尾比亚迪实业有限公司 | Single donor doping positive temperature coefficient thermal sensitive ceramic and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI409829B (en) * | 2010-09-03 | 2013-09-21 | Sfi Electronics Technology Inc | Zno varistor utilized in high temperature |
| CN104372409B (en) * | 2013-08-14 | 2017-03-01 | 中国科学院上海硅酸盐研究所 | Ternary system relaxation base ferroelectric piezoelectric single crystal and its growing method |
| JP2017143090A (en) * | 2016-02-08 | 2017-08-17 | Tdk株式会社 | Semiconductor ceramic composition and ptc thermistor |
-
2019
- 2019-08-20 CN CN201910770873.3A patent/CN110467455B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1237949A (en) * | 1996-11-20 | 1999-12-08 | 株式会社村田制作所 | Barium titanate semiconductor ceramic composition |
| EP1518841A1 (en) * | 2003-09-24 | 2005-03-30 | Yageo Corporation | Ultralow firing temperature compensating ceramic composition for pure silver eletrode, sintering flux and laminated ceramic element obtained therefrom |
| CN101891464A (en) * | 2010-06-29 | 2010-11-24 | 章慧 | High temperature thermistor and manufacturing method thereof |
| CN102649641A (en) * | 2012-05-15 | 2012-08-29 | 丹东国通电子元件有限公司 | Ceramic positive temperature coefficient (PTC) thermistor of variable-frequency air conditioner starter and manufacturing method thereof |
| CN103839637A (en) * | 2014-03-13 | 2014-06-04 | 孝感华工高理电子有限公司 | Positive temperature coefficient thermistor for car heater and manufacturing method thereof |
| CN107056279A (en) * | 2017-03-23 | 2017-08-18 | 汕尾比亚迪实业有限公司 | Single donor doping positive temperature coefficient thermal sensitive ceramic and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110467455A (en) | 2019-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102020463B (en) | Zinc oxide piezoresistor material and preparing method thereof | |
| CN103936414B (en) | A kind of high-temperature stable X9R type medium material for multilayer ceramic capacitors and preparation method thereof | |
| EP0727791A2 (en) | Semiconducting ceramic composition having positive temperature coefficient of resistance and production process thereof | |
| CN111908914B (en) | A kind of grain boundary layer ceramic material, preparation method and application of grain boundary layer ceramic substrate | |
| CN108147813B (en) | Sodium bismuth titanate-based lead-free piezoelectric ceramic with high piezoelectric coefficient and preparation method thereof | |
| CN102093052A (en) | Barium titanate-based surface oxide layer ceramic capacitor dielectric material and preparation method thereof | |
| CN103482975B (en) | High-dielectric-constant X8R type MLCC medium material and preparing method thereof | |
| WO2007139061A1 (en) | Semiconductor ceramic, laminated semiconductor ceramic capacitor, method for fabricating semiconductor ceramic, and method for fabricating laminated semiconductor ceramic capacitor | |
| CN110436920B (en) | A kind of sodium bismuth titanate-sodium tantalate solid solution ceramic material and its preparation method and application | |
| CN104529447B (en) | Bismuth layered composite structure piezoceramic material and preparation method thereof | |
| CN110467455B (en) | Preparation method of positive temperature coefficient thermistor for electric automobile | |
| CN103408302B (en) | High permittivity and high temperature stability ceramic capacitor medium and its preparation method | |
| EP2256100A1 (en) | Process for producing semiconductor porcelain composition/electrode assembly | |
| CN111533554B (en) | High-voltage ceramic pulse capacitor, dielectric material and preparation method thereof | |
| CN105174943B (en) | A kind of dielectric energy storage ceramic and preparation method thereof | |
| CN114591079B (en) | High-voltage low-loss ceramic capacitor medium and preparation method thereof | |
| US6071842A (en) | Barium titanate-based semiconductor ceramic | |
| CN115340375B (en) | A wide temperature spectrum sodium bismuth titanate-barium titanate-based ferroelectric ceramic dielectric material and its preparation method and application | |
| EP0937692B1 (en) | Barium titanate-base semiconductor ceramic | |
| CN115368128A (en) | A kind of preparation method of ZnO varistor material | |
| CN105418066B (en) | A kind of difunctional titanium dioxide ceramic material of low electric potential gradient pressure-sensitive capacitance and preparation method thereof | |
| CN108409324A (en) | A kind of ceramic capacitor dielectric material | |
| JP2014205585A (en) | Semiconductor ceramic composition and method of producing the same | |
| US10483580B2 (en) | Solid state fuel cell and method for making the same | |
| JPH0971462A (en) | Dielectric porcelain composition |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 264403 Binhai Road North, Longhai Road East, Nanhai New District, Weihai City, Shandong Province Applicant after: WEIHAI KEBOLE AUTOMOTIVE ELECTRONICS CO.,LTD. Applicant after: Weihai kebole New Energy Technology Co.,Ltd. Address before: 264403 Binhai Road North, Longhai Road East, Nanhai New District, Weihai City, Shandong Province Applicant before: WEIHAI KEBOLE AUTOMOTIVE ELECTRONICS CO.,LTD. Applicant before: Weihai Leke New Materials Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Preparation method of positive temperature coefficient thermistor for electric vehicle Effective date of registration: 20221028 Granted publication date: 20220208 Pledgee: Weihai Branch of Shanghai Pudong Development Bank Co.,Ltd. Pledgor: WEIHAI KEBOLE AUTOMOTIVE ELECTRONICS CO.,LTD. Registration number: Y2022980019993 |