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Zinc oxide varistor and preparation method thereof

A piezoresistor and zinc oxide technology, which is applied in the field of resistors, can solve the problems of unreasonable raw material formula and proportion and cannot meet the needs of use, and achieve reasonable formula and proportion, simple production method and operability strong effect

Inactive Publication Date: 2014-03-26
JIANGSU SHIXING ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw material formula and ratio of the varistors in the prior art are unreasonable and cannot meet the increasing demand for use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, a kind of zinc oxide varistor, it is made of the raw material of following weight ratio:

[0015] Zinc oxide 95; Bismuth trioxide 3.8;

[0016] Cobalt trioxide 1.0; Antimony trioxide 3.2;

[0017] Manganese carbonate 0.5; Chromium trioxide 0.4;

[0018] Silicon dioxide 0.01; NiO3 0.05;

[0019] Tin dioxide 0.005; Calcium carbonate 0.1.

Embodiment 2

[0020] Embodiment 2, a kind of zinc oxide varistor, it is made of the raw material of following weight ratio:

[0021] Zinc oxide 105; Bismuth trioxide 4.8;

[0022] Cobalt trioxide 1.5; Antimony trioxide 4.2;

[0023] Manganese carbonate 1.2; Chromium trioxide 0.8;

[0024] Silicon dioxide 0.035; Nickel trioxide 0.12;

[0025] Tin dioxide 0.02; Calcium carbonate 0.4.

Embodiment 3

[0026] Embodiment 3, a kind of production technology of zinc oxide varistor as described in embodiment 1, its steps are as follows: each raw material that weighs in proportion is mixed, after mixing, put into sand mill and grind for 1 hour ; and add an appropriate amount of water, PVA solution, dispersant and defoamer to the mixture during grinding; after grinding, use a spray dryer to granulate, and the granules pass through a 30-mesh sieve to obtain granules with a moisture content of 0.6%. ; Then use the press and film to press the pellets into a density of 3.2g / m 3 Then the green sheet is degummed at 660°C for 15 hours; then it is put into a firing furnace and fired at 1000°C for 20 hours; finally, it is cleaned, silver-fired, inserted, welded and encapsulated. Finished product after curing.

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Abstract

The invention discloses a zinc oxide varistor. The zinc oxide varistor is made from the following raw materials in parts by weight: 95-105 parts of zinc oxide, 3.8-4.8 parts of bismuth trioxide, 1.0-1.5 parts of cobalt sesquioxide, 3.2-4.2 parts of antimonous oxide, 0.5-1.2 parts of manganese carbonate, 0.4-0.8 part of chromium sesquioxide, 0.01-0.035 part of silica, 0.05-0.12 part of nickel sesquioxide, 0.05-0.02 part of stannic oxide and 0.1-0.4 part of calcium carbonate. The invention also relates to a preparation method of the zinc oxide varistor. The zinc oxide varistor disclosed by the invention is reasonable in formula and proportioning, simple in production method and strong in operability. The main index parameters of the zinc oxide varistor disclosed by the invention are excellent, and the maximal control voltage, residual voltage ratio, flow capacity, leakage current, voltage temperature coefficient, current temperature coefficient, nonlinear voltage coefficient, insulation resistance, static capacitance and the like of the zinc oxide varistor hold an advantage in the similar products.

Description

technical field [0001] The invention relates to a resistor, in particular to a zinc oxide piezoresistor, and the invention also relates to a preparation method of the resistor. Background technique [0002] Chip varistor is a kind of varistor, which is an electric shock protection device made of zinc oxide non-linear resistance element as the core. The zinc oxide non-linear resistance element is a compound semiconductor element made of zinc oxide as the main material, adding a variety of other trace elements, and made by ceramic technology. Its fundamental characteristic is the nonlinearity of the current-voltage relationship. When the voltage applied across it is lower than a certain valve voltage, that is, "varistor voltage", its resistance value is extremely large, which is in the megohm level; and when the voltage applied across it exceeds the varistor voltage, the resistance value With the increase of voltage, it drops rapidly, and it can be as small as ohm level and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622
Inventor 许萍朱木典王春明
Owner JIANGSU SHIXING ELECTRONICS TECH
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