Manufacturing method for medium-voltage high-energy zinc oxide resistor disc

A technology of zinc oxide resistance sheet and manufacturing method, which is applied in the direction of resistance manufacturing, varistor, varistor core, etc., can solve the problems of high flow, unable to meet medium voltage, low residual voltage ratio, etc., and achieve reduction The effect of residual pressure ratio, reduction of product thickness and improvement of product performance

Inactive Publication Date: 2012-10-10
扬州发运电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, neither of these two systems can meet the requirements of medium pressure, high flow and low residual pressure ratio

Method used

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  • Manufacturing method for medium-voltage high-energy zinc oxide resistor disc

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Embodiment 1

[0019] A method for manufacturing a medium-voltage high-energy zinc oxide resistor, comprising the following steps:

[0020] (1) Raw material ratio: in molar percentage, additives: 0.5% antimony trioxide, 0.1% titanium dioxide, 0.5% bismuth trioxide, 0.8% cobalt trioxide, 0.6% manganese carbonate, 0.001% silver nitrate, 0.3% tin dioxide, 0.002% strontium carbonate, 0.001% boric acid, and the balance is mainly zinc oxide;

[0021] (2) Ball milling: Weigh the additives according to the ratio of step (1) and add them to the ball mill, add pure water according to the ratio of additives: pure water = 1:1, and stir the ball mill for 3 hours;

[0022] (3) Mixing of additives and zinc oxide and spray granulation: add ball-milled additives, zinc oxide, binder, and aluminum nitrate into the dispersion mill, and ball mill for 2 hours. The weight ratio of binder to zinc oxide is 1:100 , the weight ratio of aluminum nitrate to additives is 1:300; the temperature of the slurry is controlle...

Embodiment 2

[0029] A method for manufacturing a medium-voltage high-energy zinc oxide resistor, comprising the following steps:

[0030] (1) Raw material ratio: in molar percentage, additives: 1.0% antimony trioxide, 0.4% titanium dioxide, 0.8% bismuth trioxide, 1.5% cobalt trioxide, 1.0% manganese carbonate, 0.002% silver nitrate, di 0.5% tin oxide, 0.004% strontium carbonate, 0.003% boric acid, and the balance is mainly zinc oxide;

[0031] (2) Ball milling: Weigh the additives according to the ratio of step (1) and add them to the ball mill, add pure water according to the ratio of additives: pure water = 1:1, and stir the ball mill for 5 hours;

[0032] (3) Mixing of additives and zinc oxide and spray granulation: add ball-milled additives, zinc oxide, binder, and aluminum nitrate into the dispersion mill, and ball mill for 2 hours. The weight ratio of binder to zinc oxide is 1:100 , the weight ratio of aluminum nitrate to additives is 1:300; the slurry temperature is controlled at 6...

Embodiment 3

[0039] A method for manufacturing a medium-voltage high-energy zinc oxide resistor, comprising the following steps:

[0040] (1) Raw material ratio: by mole percentage, additives: 1.2% antimony trioxide, 0.6% titanium dioxide, 1.3% bismuth trioxide, 2.1% cobalt trioxide, 1.3% manganese carbonate, 0.003% silver nitrate, 0.6% tin dioxide, 0.005% strontium carbonate, 0.006% boric acid, and the balance is mainly zinc oxide;

[0041] (2) Ball milling: Weigh the additives according to the ratio of step (1) and add them to the ball mill, add pure water according to the ratio of additives: pure water = 1:1, and stir the ball mill for 5 hours;

[0042] (3) Mixing of additives and zinc oxide and spray granulation: add ball-milled additives, zinc oxide, binder, and aluminum nitrate into the dispersion mill, and ball mill for 4 hours. The weight ratio of binder to zinc oxide is 1:100 , the weight ratio of aluminum nitrate to additives is 1:300; the temperature of the slurry is controlled...

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Abstract

Disclosed is a manufacturing method for a medium-voltage high-energy zinc oxide resistor disc. The manufacturing method includes: adding, by mole percentage, 0.5-1.2% of antimonous oxide, 0.1-0.6% of titanium dioxide, 0.5-1.3% of bismuth oxide, 0.8-2.1% of cobaltic oxide, 0.6-1.3% of manganese carbonate, 0.001-0.003% of silver carbonate, 0.3-0.6% of stannic oxide, 0.002-0.005% of strontium carbonate, 0.001-0.006% of boric acid and balance of zinc oxide serving as the major ingredient, ball-milling, mixing, spraying for granulation, water-containing, forming and sintering. The medium-voltage resistor manufactured by the method is lowered in residual voltage ratio and improved in through-flow performance, and the gradient reaches to 100-120V / mm, 10Ka residual voltage ratio can be controlled within 1.85-1.90 when a phi 60 resistor disc is taken as an example.

Description

technical field [0001] The invention relates to a method for manufacturing a medium-voltage high-energy zinc oxide resistor, belonging to the technical field of resistor sheet preparation. Background technique [0002] From the perspective of formula system, zinc oxide resistors are mainly divided into ZnO-Bi 2 o 3 -Sb 2 o 3 system and ZnO-Bi 2 o 3 -TiO 2 Tie. In ZnO-Bi 2 o 3 -Sb 2 o 3 In the system, Sb-2O-3 forms a spinel phase Zn-7Sb-2O-(12) in the ZnO matrix during sintering, which is pinned between ZnO crystals and inhibits the growth of ZnO grains. Therefore, an appropriate amount of Sb-2O-3 doping is beneficial to the sintering and densification of ZnO composite ceramics. It is characterized by small grain size (6-18μm), high gradient (200-300V / mm), low residual voltage ratio, but weak flow capacity. ZnO-Bi 2 o 3 -TiO 2 The characteristics of the series resistor are large average grain size (30-60μm), low gradient (30-70V / mm), high flow energy, but limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C17/30H01C7/112C04B35/622C04B35/453
Inventor 李发运
Owner 扬州发运电气有限公司
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