Preparation method and application of voltage-sensitive ceramic material

A technology of varistor ceramics and powder materials, which is applied to varistors, varistor cores, etc., can solve the problems of low nonlinear coefficient and high varistor voltage, simplify the manufacturing process, reduce varistor voltage, and reduce Effect of E1mA

Active Publication Date: 2015-08-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent still has the disadvantages of high varistor voltage and low nonlinear coefficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Described in this embodiment (Ge, Nb 2 o 5 , Y 2 o 3 ) co-doped TiO 2 The preparation method of pressure-sensitive ceramics, concrete steps are as follows:

[0023] (1) Ge powder (with a particle size of 45 μm), Nb 2 o 5 (particle size 45μm) powder and Y 2 o 3 (particle size 45 μm) powder was added to the TiO 2 (with a particle size of 45 μm) mixed uniformly with the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material is 0.90%, Nb 2 o 5 The mass percentage of Y is 0.66%, Y 2 o 3 The mass percentage is 0.56%, and the rest is TiO 2 ;

[0024] (2) Ball mill the mixed powder prepared in step (1) (add water and alcohol to ball mill and mix for 6 hours), dry, pass through a 300-mesh standard sieve, and then granulate (granulation process: press the dried powder and polyvinyl alcohol aqueous solution The mass ratio is 10:1. Add polyvinyl alcohol aqueous solution to the powder and grind for 15 minutes. After passing through a ...

Embodiment 2

[0029] Described in this embodiment (Ge, Nb 2 o 5 , Y 2 o 3 ) co-doped TiO 2 The preparation method of pressure-sensitive ceramics, concrete steps are as follows:

[0030] (1) Ge powder (particle size: 30μm), Nb 2 o 5 (30μm particle size) powder and Y 2 o 3 (particle size 30 μm) powder was added to the TiO 2 (with a particle size of 30 μm) mixed uniformly with powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material was 1.8%, Nb 2 o 5 The mass percentage is 1.0%, Y 2 o 3 The mass percentage is 0.56%, and the rest is TiO 2 ;

[0031] (2) Ball mill the mixed powder prepared in step (1) (add water and alcohol to ball mill and mix for 8 hours), dry, pass through a 320-mesh standard sieve, and then granulate (granulation process: press the dried powder and polyvinyl alcohol aqueous solution The mass ratio is 8:1, adding polyvinyl alcohol aqueous solution to the powder and grinding for 20 minutes, passing through a 42-mesh standard siev...

Embodiment 3

[0036] Described in this embodiment (Ge, Nb 2 o 5 , Y 2 o 3 ) co-doped TiO 2 The preparation method of pressure-sensitive ceramics, concrete steps are as follows:

[0037] (1) Ge powder (particle size is 20μm), Nb 2 o 5 (particle size 20μm) powder and Y 2 o 3 (particle size 20 μm) powder was added to the TiO 2 (with a particle size of 20 μm) mixed uniformly with the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material was 2.68, Nb 2 o 5 The mass percentage is 1.6%, Y 2 o 3 The mass percentage is 1.39%, and the rest is TiO 2 ;

[0038] (2) Ball mill the mixed powder prepared in step (1) (add water and alcohol to ball mill and mix for 12 hours), dry, pass through a 350-mesh standard sieve, and then granulate (granulation process: press the dried powder and polyvinyl alcohol aqueous solution The mass ratio is 5:1, adding polyvinyl alcohol aqueous solution to the powder and grinding for 30 minutes. After passing through a 40-mesh ...

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Abstract

The invention relates to a preparation method and application of a voltage-sensitive ceramic material and belongs to the technical fields of electrical apparatus elements and material manufacture of the electrical apparatus elements. The preparation method comprises the steps of firstly adding Ge, Nb2O5 and Y2O3 into TiO2 to obtain a mixed material, then conducting wet grinding, drying, screening and pelleting on the mixed material, continuing to perform screening after pelleting, producing powder into small round pieces, conducting heating and glue discharging on the small round pieces, preheating, sintering and cooling the small round pieces to be at room temperature to obtain (Ge, Nb2O5 and Y2O3) co-doped TiO2 voltage-sensitive ceramic, conducting voltage-sensitive ceramic surface processing, electrode adding, silver electrode firing and package to obtain a (Ge, Nb2O5 and Y2O3) co-doped TiO2 voltage-sensitive resistor. The performance of the TiO2 voltage-sensitive resistor is improved.

Description

technical field [0001] The invention relates to a preparation method and application of a pressure-sensitive ceramic material, and belongs to the technical field of electrical components and material manufacturing thereof. Background technique [0002] TiO 2 The varistor was first researched and developed abroad in the 1980s. TiO 2 The varistor has the advantages of low varistor voltage and strong surge resistance, and the process is simple. It does not need to be reduced and fired at high temperature, saves heat treatment, and can be fired in the atmosphere at one time, which greatly reduces the cost. It is a kind of Very promising functional resistance element. [0003] The relatively mature varistors made at home and abroad are mainly ZnO and SrTiO 3 For these two types, their manufacturing process is more complicated, especially in SrTiO 3 Atmosphere control, complex sintering curve of ZnO, etc. Not only the process is complicated, the cost is relatively high, but ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/626H01C7/115
Inventor 甘国友康昆勇严继康易建红杜景红张家敏刘意春鲍瑞谈松林赵文超荣雪全王志敏
Owner KUNMING UNIV OF SCI & TECH
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