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

A varistor and edge technology, which is applied in the field of slurry preparation for electronic components, can solve problems such as body damage during soaking time, edge breakdown, and difficult diffusion of the green body, and achieve low preparation costs, solve edge breakdown, and process simple effect

Active Publication Date: 2015-05-06
GUANGXI NEW FUTURE INFORMATION IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 Product safety accidents such as burning
In order to solve the above problems, many solutions have been proposed, such as a safety surge protector valve material and its preparation method, the patent number is 201410325058.3, which uses an aqueous solution of yttrium nitrate to diffuse around the green body, but this method diffuses The amount of liquid and the penetration depth are difficult to grasp, and it is difficult to spread the green body with solid density, and it is easy to cause damage to the green body if the soaking time is too long. Therefore, the above technical scheme can be improved to effectively solve the edge of power frequency breakdown problem

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of varistor edge coating slurry is carried out according to the following steps:

[0021] 1. First, accurately weigh 3.0572 grams of ZnO and 32.8428 grams of Sb with a purity of ≥99% 2 o 3 , 37.7361 g Y 2 o 3 , 26.2478 grams Bi 2 o 3 , 0.1161 g H 3 BO 3 Put it into a ball mill jar, add 400 grams of zirconium balls and 200 grams of deionized water, and mix it with a planetary ball mill for 4 hours at a speed of 100 rpm, then quickly dry it in an oven at 140°C until it is completely dried;

[0022] 2. Crush the dried powder in step 1, put it into an alumina crucible, then put the crucible into a muffle furnace, pre-fire it at 850°C, keep it warm for 1 hour, and raise the temperature at 5°C / min, then Furnace cooling;

[0023] 3. Grind the pre-fired powder in step 2, put it into an agate ball mill jar, add 400 grams of zirconium balls and 250 ml of ethanol, mix it with a planetary ball mill for 4 hours at a speed of 100 rpm, and then bake it in ...

Embodiment 2

[0031] A preparation method of varistor edge coating slurry is carried out according to the following steps:

[0032] 1. First, accurately weigh 5.6352 grams of ZnO and 29.8845 grams of Sb with a purity of ≥99% 2 o 3 , 35.6896 g Y 2 o 3 , 28.5443 g Bi 2 o 3 , 0.2464 g H 3 BO 3 Put it into a ball mill jar, add 400 grams of zirconium balls and 200 grams of deionized water, and mix it with a planetary ball mill for 4 hours at a speed of 100 rpm, then quickly dry it in an oven at 120°C until it is completely dried;

[0033] 2. Grind the powder dried in step 1, put it into an alumina crucible, then put the crucible into a muffle furnace, pre-fire it at 950°C, keep it warm for 1 hour, and increase the temperature by 10°C / min. Furnace cooling;

[0034] 3. Grind the pre-fired powder in step 2, put it into an agate ball mill jar, add 400 grams of zirconium balls and 250 ml of ethanol, mix it in a planetary ball mill for 8 hours at a speed of 150 rpm, and then bake it in an oven...

Embodiment 3

[0042] A preparation method of varistor edge coating slurry is carried out according to the following steps:

[0043] 1. First, accurately weigh 8.7245 grams of ZnO and 29.5542 grams of Sb with a purity of ≥99% 2 o 3 , 35.9195 g Y 2 o 3 , 25.4562 g Bi 2 o 3 , 0.3456 g H 3 BO 3 Put it into a ball mill jar, add 400 grams of zirconium balls and 200 grams of deionized water, and mix it with a planetary ball mill for 4 hours at a speed of 100 rpm, then quickly dry it in an oven at 140°C until it is completely dry;

[0044] 2. Crush the dried powder in step 1, put it into an alumina crucible, then put the crucible into a muffle furnace, pre-fire it at 850°C, keep it warm for 1 hour, and raise the temperature at 5°C / min, then Furnace cooling;

[0045] 3. Grind the pre-fired powder in step 2, put it into an agate ball mill jar, add 400 grams of zirconium balls and 250 ml of ethanol, mix it with a planetary ball mill for 8 hours at a speed of 100 rpm, and then bake it in an ove...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/112C04B41/85
Inventor 刘丹廖文华李丙咸莫积海褚冬进钟璇
Owner GUANGXI NEW FUTURE INFORMATION IND
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