Voltage-sensitive resistor edge coating slurry material and preparation method thereof

Abstract

The invention discloses a voltage-sensitive resistor edge coating slurry material and a preparation method thereof. The slurry material mainly comprises the following components in percentage by mass: 55%-65% of composite powder, 10%-20% of glass powder and 23%-28% of an organic carrier, wherein the composite powder is ultrafine composite powder prepared by fully and uniformly mixing the following raw materials in percentage by mass: 3%-10% of ZnO, 25%-35% of Sb2O3, 32%-43% of Y2O3, 20%-34% of Bi2O3 and 0.1%-0.5% of H3BO3, pre-sintering at 850 DEG C-1000 DEG C, fully crushing and sieving; and the glass powder comprises the following raw materials in percentage by mass: 15%-25% of ZnO, 50%-70% of Bi2O3, 2%-5% of B2O3, 5%-10% of SiO2, 0.5%-2% of K2CO3 and 5%-10% of ZrO2. The edge and circumferential circular wall of a green body of disintegrated voltage-sensitive resistor ceramic are mainly coated with slurry and the phenomenon that the lower edge is broken down due to power frequency over-voltage can be effectively solved.

Description

technical field

[0001] The invention relates to a varistor edge coating slurry material and a preparation method thereof, belonging to the field of electronic component slurry preparation. Background technique

[0002] Zinc oxide varistors are widely used in overvoltage protection of power systems, electronic circuits, and microelectronic circuits due to their high nonlinear characteristics, high energy absorption capacity, and low power consumption. Since it was developed and commercialized by Panasonic Corporation of Japan in 1968, through more than 40 years of development, the technical level and quality of the products have been greatly improved. However, as a safety protection device, some products often have edge breakdown phenomenon under the condition of power frequency overvoltage for a long time, so that the short circuit information of the varistor cannot be transmitted to the thermal tripping device in the form of heat in time, which leads to The product has saf...

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