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Thermistor medium material and preparation method thereof

A technology for thermistors and dielectric materials, applied in the direction of resistors, non-adjustable metal resistors, resistors with negative temperature coefficients, etc., can solve problems such as circuit failure, tin layer is easy to melt, thermistors fall off, etc. , to achieve the effects of small residual current, high withstand voltage and high reliability

Inactive Publication Date: 2017-01-04
ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the designed operating temperature range of the existing chip negative temperature coefficient thermistor is -40°C-125°C. more than 10%
Secondly, at this temperature, the tin layer of the terminal electrode of this existing negative temperature coefficient thermistor is easy to melt, causing the thermistor to fall off and lose its function in the circuit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention provides a thermistor dielectric material, which is prepared from the following raw materials in parts by weight: BaTiO3: 81 parts, Sb2O3: 10 parts, Co2O3: 5 parts, SrCO3: 1 part, MnO2: 2 parts, Cr2O3 : 2 parts, SnO2: 3 parts, SiO2: 2 parts, CeO2: 2 parts, ZrO2: 2 parts, Y2O3: 3 parts;

[0022] Its preparation method is:

[0023] (1) First take by weighing Sb2O3, Co2O3, SrCO3, MnO2, Cr2O3, SnO2, SiO2, CeO2, ZrO2, Y2O3 each component raw material according to weight part number, obtain mixed material A, add the pure material that weight is mixed material A 3 times water, and add an ammonium salt dispersant, the weight of the added ammonium salt dispersant is 0.8% of the mixed material A; then ball mill in a ball mill for 3h to obtain additive slurry;

[0024] (2) main component raw material BaTiO3 is added in the additive slurry, stirs to mix evenly, then add weight main component raw material BaTiO3 5% ceramic binder and polyvinyl alcohol solution, after ...

Embodiment 2

[0029] The invention provides a thermistor dielectric material, which is prepared from the following raw materials in parts by weight: BaTiO3: 84 parts, Sb2O3: 20 parts, Co2O3: 12 parts, SrCO3: 9 parts, MnO2: 6 parts, Cr2O3 : 8 parts, SnO2: 5 parts, SiO2: 10 parts, CeO2: 10 parts, ZrO2: 8 parts, Y2O3: 10 parts;

[0030] Its preparation method is:

[0031] (1) First take by weighing Sb2O3, Co2O3, SrCO3, MnO2, Cr2O3, SnO2, SiO2, CeO2, ZrO2, Y2O3 each component raw material according to weight part number, obtain mixed material A, add the pure material that weight is mixed material A 3 times water, and add an ammonium salt dispersant, the weight of the added ammonium salt dispersant is 0.9% of the mixed material A; then ball mill in a ball mill for 2 hours to obtain additive slurry;

[0032] (2) main component raw material BaTiO3 is added in the additive slurry, stirs to mix evenly, then add weight main component raw material BaTiO3 5% ceramic binder and polyvinyl alcohol soluti...

Embodiment 3

[0037] The invention provides a thermistor dielectric material, which is prepared from the following raw materials in parts by weight: BaTiO3: 82 parts, Sb2O3: 12 parts, Co2O3: 6 parts, SrCO3: 2 parts, MnO2: 4 parts, Cr2O3 : 3 parts, SnO2: 3 parts, SiO2: 3 parts, CeO2: 4 parts, ZrO2: 3 parts, Y2O3: 6 parts;

[0038] Its preparation method is:

[0039] (1) First take by weighing Sb2O3, Co2O3, SrCO3, MnO2, Cr2O3, SnO2, SiO2, CeO2, ZrO2, Y2O3 each component raw material according to weight part number, obtain mixed material A, add the pure material that weight is mixed material A 3 times water, and add an ammonium salt dispersant, the weight of the added ammonium salt dispersant is 0.8% of the mixed material A; then ball mill in a ball mill for 2h to obtain additive slurry;

[0040] (2) main component raw material BaTiO3 is added in the additive slurry, stirs to mix evenly, then add weight main component raw material BaTiO3 5% ceramic binder and polyvinyl alcohol solution, after...

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Abstract

The invention discloses thermistor medium material and a preparation method thereof. The thermistor medium material is prepared from the following raw materials in parts by weight: 80 to 85 parts of BaTiO3 (barium titanate), 10 to 20 parts of Sb2O3 (antimonous oxide), 5 to 12 parts of Co2O3 (cobalt sesquioxide), 1 to 9 parts of SrCO3 (strontium carbonate), 2 to 6 parts of MnO2 (manganese dioxide), 2 to 8 parts of Cr2O3 (chromium sesquioxide), 3 to 5 parts of SnO2 (stannic oxide), 2 to 10 parts of SiO2 (silicon dioxide), 2 to 10 parts of CeO2 (cerium dioxide), 2 to 8 parts of ZrO2 (zirconium oxide), and 3 to 10 parts of Y2O3 (yttrium oxide). The thermistor medium material has the advantages that the service life is prolonged, the cost is low, the preparation cost is simple, the material cost is greatly reduced, and the energy-saving and environment-friendly requirements are met.

Description

technical field [0001] The invention relates to the field of thermistors, in particular to a thermistor dielectric material and a preparation method thereof. Background technique [0002] In recent years, electronic components have been required to adapt to surface mounting, and NTC thermistors with negative temperature characteristics have also been developed into chips. The operating temperature range of the existing chip-type negative temperature coefficient thermistor is mainly between -40°C and 125°C, and the surface of the terminal electrode is plated with a tin layer so that it can be soldered in the circuit by reflow soldering during the process of soldering the circuit. With the development of technology, some negative temperature coefficient thermistors used in higher temperature occasions also have a chip demand. For example, the temperature control of the laser printer head needs a chip that can be used stably in the temperature range of 200°C-300°C. Negative te...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/622H01C7/04
CPCC04B35/4682C04B35/622C04B2235/3213C04B2235/3225C04B2235/3229C04B2235/3241C04B2235/3244C04B2235/3262C04B2235/3275C04B2235/3293C04B2235/3294C04B2235/3418H01C7/043
Inventor 汪洋陈启志危国慧刘萍萍
Owner ANHUI NINGGUO TIANCHENG ELECTRICAL APPLIANCES
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