Liquid high resistance layer for zinc oxide varistors

A technology of varistor and zinc oxide, which is applied in varistor cores, varistors, overvoltage protection resistors, etc., and can solve the problem of poor uniformity of the glaze layer, limitation of the flow capacity of the resistor sheet, and the production of high-resistance layers. Problems such as complicated process, to reduce the fluctuation of glaze layer thickness, solve the problem of side insulation, and improve the effect of square wave flow capacity
CN108503392BActive Publication Date: 2020-01-21TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2020-01-21

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Abstract

The invention provides a liquid high-resistance layer for a zinc oxide piezoresistor. A formula comprises Bi(NO3)3, Co(NO3)2, Mn(NO3)2 and CH3COOLi; a preparation method of the liquid high-resistancelayer comprises the following steps: mixing each raw material in the formula with a solvent; heating and dissolving. An application method of the liquid high-resistance layer coats a side face of a resistance piece with a formula solution. The liquid high-resistance layer of the zinc oxide piezoresistor has the beneficial effects that the formula of the high-resistance layer is adjusted and a technology is controlled, so that a body of the resistance piece is matched with the shrinkage rate of a glaze layer; the side face insulation problem of the resistance piece is solved; meanwhile, the square wave discharge capability of the resistance piece is improved. The original fluctuation of glaze layer thickness, caused by the fact that pre-firing shrinkage rates are different, is reduced; theresistance piece has no cracks and the technology is more stable.
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Description

technical field

[0001] The invention relates to the field of production of zinc oxide varistors, in particular to a liquid high-resistance layer for zinc oxide varistors and its configuration and use methods. Background technique

[0002] The existing manufacturing method of zinc oxide resistor is better applied because of its stable process and high product qualification rate, but it also has disadvantages. One is that the manufacturing process of the high-resistance layer is complicated, and the stability of the glaze slurry is poor; the second is that the uniformity of the glaze layer is poor, and the thickness of the glaze layer is greatly affected by the firing shrinkage; the third is that the pressure ratio of the resistance sheet is poor, and the flow capacity of the resistance sheet restricted.

[0003] With the continuous improvement of product technology level, the requirements for product performance are also getting higher and higher. The original pressure ratio...

Claims

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