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Zinc oxide piezoresistor medium with high electric potential gradient and high nonlinear coefficient and preparation method thereof

A varistor, high nonlinear technology, applied in varistor cores, varistors, etc., can solve the problems of weak pulse shock tolerance and small nonlinear coefficient, and achieve pulse shock tolerance Effect of strong, high potential gradients, high nonlinear coefficients

Inactive Publication Date: 2017-11-07
汕头市瑞升电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, zinc oxide varistor dielectric materials have high potential gradients, but most of them have small nonlinear coefficients, or weak pulse shock tolerance, and it is difficult to meet the lightning protection and overvoltage protection requirements of power electronic circuits. need

Method used

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  • Zinc oxide piezoresistor medium with high electric potential gradient and high nonlinear coefficient and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] First, MnNb was synthesized by a solid-phase method 2 o 6 , MnSiO 3 .

[0027] MnNb 2 o 6 The following process is used to prepare: equip MnCO with a molar ratio of 1:1 3 and Nb 2 o 5 , then for MnCO 3 and Nb 2 o 5 Grind and mix well; then MnCO 3 and Nb 2 o 5 The mixed material was put into an alumina crucible and kept at 1180°C for 120 minutes to obtain MnNb 2 o 6 . Obtained MnNb 2 o 6 After cooling, grind and pass through a 200-mesh sieve for later use.

[0028] MnSiO 3 The following process is used to prepare: equip MnCO with a molar ratio of 1:1 3 and SiO 2 , then for MnCO 3 and SiO 2 Grind and mix well; then MnCO 3 and SiO 2 The mixed material was put into an alumina crucible and kept at 1220°C for 120 minutes to obtain MnSiO 3 . The obtained MnSiO 3 After cooling, grind and pass through a 200-mesh sieve for later use.

[0029] Then, prepare a zinc oxide varistor medium with high potential gradient and high nonlinear coefficient according ...

Embodiment 2

[0043] First, MnNb was synthesized by a solid-phase method 2 o 6 , MnSiO 3 .

[0044] MnNb 2 o 6 The following process is used to prepare: equip MnCO with a molar ratio of 1:1 3 and Nb 2 o 5 , then for MnCO 3 and Nb 2 o 5 Grind and mix well; then MnCO 3 and Nb 2 o 5 The mixed material was put into an alumina crucible and kept at 1150°C for 120 minutes to obtain MnNb 2 o 6 . Obtained MnNb 2 o 6 After cooling, grind and pass through a 200-mesh sieve for later use.

[0045] MnSiO 3 The following process is used to prepare: equip MnCO with a molar ratio of 1:1 3 and SiO 2 , then for MnCO 3 and SiO 2 Grind and mix well; then MnCO 3 and SiO 2 The mixed material was put into an alumina crucible and kept at 1250°C for 120 minutes to obtain MnSiO 3 . The obtained MnSiO 3 After cooling, grind and pass through a 200-mesh sieve for later use.

[0046] Then, the zinc oxide varistor medium with high potential gradient and high nonlinear coefficient is prepared ac...

Embodiment 3

[0060] First, MnNb was synthesized by a solid-phase method 2 o 6 , MnSiO 3 .

[0061] MnNb 2 o 6 The following process is used to prepare: equip MnCO with a molar ratio of 1:1 3 and Nb 2 o 5 , then for MnCO 3 and Nb 2 o 5 Grind and mix well; then MnCO 3 and Nb 2 o 5 The mixed material was put into an alumina crucible and kept at 1200°C for 120 minutes to obtain MnNb 2 o 6 . Obtained MnNb 2 o 6 After cooling, grind and pass through a 200-mesh sieve for later use.

[0062] MnSiO 3 The following process is used to prepare: equip MnCO with a molar ratio of 1:1 3 and SiO 2 , then for MnCO 3 and SiO 2 Grind and mix well; then MnCO 3 and SiO 2 The mixed material was put into an alumina crucible and kept at 1200°C for 120 minutes to obtain MnSiO 3 . The obtained MnSiO 3 After cooling, grind and pass through a 200-mesh sieve for later use.

[0063] Then, prepare a zinc oxide varistor medium with high potential gradient and high nonlinear coefficient accordin...

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Abstract

The invention provides a zinc oxide piezoresistor medium with high electric potential gradient and high nonlinear coefficient. The zinc oxide piezoresistor medium is prepared from the following components in parts by mol: 100 parts of ZnO, 0.03 to 1.5 parts of Sb2O3, 0.03 to 1.5 parts of Co2O3, 0.03 to 1.5 parts of Bi2O3, 0.03 to 1.5 parts of Ni2O3, 0.03 to 1.5 parts of Cr2O3, 0.03 to 1.5 parts of MnNb2O6, 0.03 to 0.8 part of Al2O3, 0.03 to 0.8 part of zinc borate, 0.03 to 0.8 part of LiNO3 and 0.03 to 0.8 part of MnSiO3. The invention further provides a preparation method of the zinc oxide piezoresistor medium with the high electric potential gradient and the high nonlinear coefficient. The zinc oxide piezoresistor medium provided by the invention has the advantages of high electric potential gradient, high nonlinear coefficient and strong pulse impact endurance capability.

Description

technical field [0001] The invention relates to a dielectric material of a piezoresistor, in particular to a zinc oxide piezoresistor medium with high potential gradient and high nonlinear coefficient and a preparation method thereof. Background technique [0002] Zinc oxide varistor materials can be used to manufacture high-energy zinc oxide varistors, which can be used to manufacture lightning arresters or varistors, which are used in power electronic circuits to absorb abnormal overvoltages to protect circuits system. In power electronic circuits, abnormal overvoltages are often caused by lightning strike loads. Zinc oxide varistor dielectric materials have been widely used in power electronic circuits to absorb or suppress abnormal overvoltages to protect power electronic circuits from damage. [0003] However, the potential gradient (varistor voltage per unit thickness) of the zinc oxide varistor dielectric material that has been applied is usually lower than 250V / mm. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/626H01C7/112
CPCC04B35/453C04B35/6261C04B2235/3203C04B2235/3217C04B2235/3241C04B2235/3255C04B2235/3262C04B2235/3275C04B2235/3279C04B2235/3294C04B2235/3298C04B2235/3409C04B2235/3427H01C7/112
Inventor 陈映义牛继恩王新苗李云峰姜学文
Owner 汕头市瑞升电子有限公司
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