Aqueous gel tape casting method for preparing DC (direct current) zinc oxide voltage-sensitive resistor disk

A varistor, water-based gel technology, applied in the direction of varistor, varistor core, overvoltage protection resistor, etc., can solve the problems of deterioration of production conditions, high production cost, environmental pollution, etc. The effect of reducing pollution, dense overall structure and uniform composition

Inactive Publication Date: 2012-11-28
JIANGSU JINLEIKAI PHOTOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional tape casting slurry contains a large amount of organic solvents as carriers, such as toluene, xylene, etc., which have certain toxicity, deteriorate the production conditions and cause environmental pollution, and the production cost is very high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) According to the mass percentage, the formula is composed of the following raw materials:

[0020] Main material ZnO: 92.4%, : 3.4%, Ni 2 o 3 :0.8%, :1.0%, WO 3 : 0.2%, Fe 2 o 3 : 0.4%, MnCO 3 : 0.7%, B 2 o 3 : 1.1%.

[0021] (2) According to the mass percentage of each raw material in the formula (1), weigh other raw material powders except bismuth oxide, use zirconia balls, polyethylene tanks, dispersant, and water, and wet grind them in a frequency conversion planetary ball mill for 8 hours. The dispersant is sodium tripolyphosphate, the rotational speed is set at 650rpm, the mass ratio of zirconia ball: raw material powder: water is 45:10:1, and the mass ratio of dispersant: raw material powder is 1:370;

[0022] (3) After step (2), add organic monomer: polyhydroxyethyl methacrylate; crosslinking agent: dimethylaminoethyl methacrylate, raw material powder: organic monomer: crosslinking agent The mass ratio is 230:8:1, continue to mix and grind for 45 mi...

Embodiment 2

[0030] (1) According to the mass percentage, the formula is composed of the following raw materials:

[0031] Main material ZnO: 92.3%, : 3.8%, Ni 2 o 3 :0.8%, :1.0%, WO 3 : 0.1%, Fe 2 o 3 : 0.4%, MnCO 3 : 0.5%, B 2 o 3 : 1.1%.

[0032] (2) According to the mass percentage of each raw material in the formula (1), weigh other raw material powders except nano-bismuth oxide, use zirconia balls, polyethylene tanks, dispersant, and water, and wet grind them in a frequency conversion planetary ball mill for 8 hours , the dispersant is sodium tripolyphosphate, the rotating speed is set to 650rpm, the mass ratio of zirconia ball: raw material powder: water is 45:10:1, and the mass ratio of dispersant: raw material powder is 1:370;

[0033] (3) After step (2), add organic monomer: polyhydroxyethyl methacrylate; crosslinking agent: dimethylaminoethyl methacrylate, raw material powder: organic monomer: crosslinking agent The mass ratio is 230:8:1, continue to mix and grind for 4...

Embodiment 3

[0041] (1) According to the mass percentage, the formula is composed of the following raw materials:

[0042] Main material ZnO: 91.8%, : 4.3%, Ni 2 o 3 :0.6%, :1.0%, WO 3 : 0.1%, Fe 2 o 3 : 0.4%, MnCO 3 : 0.7%, B 2 o 3 : 1.1%.

[0043] (2) According to the mass percentage of each raw material in the formula (1), weigh other raw material powders except bismuth oxide, use zirconia balls, polyethylene tanks, dispersant, and water, and wet grind them in a frequency conversion planetary ball mill for 8 hours. The dispersant is sodium tripolyphosphate, the rotational speed is set at 650rpm, the mass ratio of zirconia ball: raw material powder: water is 45:10:1, and the mass ratio of dispersant: raw material powder is 1:370;

[0044] (3) After step (2), add organic monomer: polyhydroxyethyl methacrylate; crosslinking agent: dimethylaminoethyl methacrylate, raw material powder: organic monomer: crosslinking agent The mass ratio is 230:8:1, continue to mix and grind for 45 mi...

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PUM

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Abstract

The invention relates to the technology of the manufacturing of voltage-sensitive resistor materials, in particular to a method for preparing a DC (direct current) zinc oxide voltage-sensitive resistor disk. The conventional tape casting molding slurry contains a great amount of organic solvents served as carriers such as toluene and xylene, has certain toxicity, worsens the production conditions, causes environmental pollution and has extremely high production cost. Combined with an aqueous gel tape casting process and a preparation technology of the voltage-sensitive ceramic resistor disk, the invention provides an aqueous gel tape casting method for preparing the DC zinc oxide voltage-sensitive resistor disk. The aqueous gel tape casting method comprises the following steps of: 1, preparing raw materials; 2, preparing ceramic green bodies by a gel tape casting method; 3, cutting the resistor disk in required shapes and size, and sintering at high temperature; and 4, coating bismuth slurry at both ends of the sintered resistor disk, and heating at certain temperature to make bismuth components uniformly infiltrate into the resistor disk so as to obtain the required DC zinc oxide voltage-sensitive resistor disk. The resistor disk is compact in integral structure and uniform in the components and has comprehensive electrical performance.

Description

technical field [0001] The invention relates to a piezoresistor material manufacturing technology, in particular to a method for preparing a direct-current zinc oxide piezoresistor sheet. Background technique [0002] Zinc oxide surge arrester is an essential component used to protect electrical equipment and transmission circuits. Its function is to absorb overvoltage energy in the circuit and limit the amplitude of overvoltage. It has good nonlinearity and excellent flow capacity. The zinc oxide resistor is the core component of the zinc oxide arrester, and its quality level directly affects the performance of the arrester. [0003] Tape casting is a method in which solvents, dispersants, binders, plasticizers and other components are added to the raw material powder to obtain a uniformly dispersed and stable slurry, which is formed on a tape casting machine. This method is widely used in the molding and preparation of ceramic materials. It has a series of advantages suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C17/30H01C7/112H01C7/12
Inventor 花银群钟庆东杨国平
Owner JIANGSU JINLEIKAI PHOTOELECTRIC TECH
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