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Zinc oxide varistor and preparation method thereof

A varistor and zinc oxide technology, applied in varistors, varistor cores, resistance manufacturing, etc., to achieve the effects of energy saving, potential gradient improvement, and good fluidity

Inactive Publication Date: 2017-01-04
陆川县华鑫电子厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flow capacity of the varistor is larger, but smaller than that of the gas discharge tube

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A zinc oxide varistor sheet, the raw materials are composed according to the following ratios:

[0032]68 parts of zinc oxide, 2 parts of bismuth trioxide, 0.4 part of tricobalt tetroxide, 0.3 part of dicobalt trioxide, 3 parts of tin dioxide, 0.2 part of manganese dioxide, 0.05 part of nickel trioxide, 3 parts of silicon dioxide, boron oxide 0.2 parts, 0.003 parts of aluminum nitrate, 0.006 parts of glass powder, 0.02 parts of rare earths, 0.02 parts of praseodymium oxides, 0.3 parts of dichromium trioxide, 0.5 parts of boric acid, and 0.8 parts of silver nitrate.

[0033] The preparation method of a kind of zinc oxide varistor sheet, comprises the steps:

[0034] (1) After mixing bismuth trioxide, tricobalt tetroxide, cobalt trioxide, tin dioxide, manganese dioxide, nickel trioxide, silicon dioxide, boron oxide, glass powder, rare earth and praseodymium oxide, add high-speed Isobaric stirring ball mill, and adding high-purity water in the same weight ratio, and ball ...

Embodiment 2

[0044] A zinc oxide varistor sheet, the raw materials are composed according to the following ratios:

[0045] 92 parts of zinc oxide, 18 parts of bismuth trioxide, 19 parts of tricobalt tetroxide, 11 parts of dicobalt trioxide, 24 parts of tin dioxide, 11 parts of manganese dioxide, 5.4 parts of nickel trioxide, 16 parts of silicon dioxide, boron oxide 6.9 parts, 0.06 parts of aluminum nitrate, 0.07 parts of glass powder, 0.4 parts of rare earth, 0.4 parts of praseodymium oxide, 10 parts of chromium trioxide, 4 parts of boric acid, and 3.5 parts of silver nitrate.

[0046] The preparation method of a kind of zinc oxide varistor sheet, comprises the steps:

[0047] (1) After mixing bismuth trioxide, tricobalt tetroxide, cobalt trioxide, tin dioxide, manganese dioxide, nickel trioxide, silicon dioxide, boron oxide, glass powder, rare earth and praseodymium oxide, add high-speed Isobaric stirring ball mill, and adding high-purity water in the same weight ratio, ball milling for...

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PUM

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Abstract

The invention provides a zinc oxide varistor which comprises the following raw materials: 68-92 parts of zinc oxide, 2-18 parts of bismuth trioxide, 0.4-19 parts of cobaltosic oxide, 0.3-11 parts of cobalt sesquioxide, 3-24 parts of stannic oxide, 0.2-11 parts of manganese dioxide, 0.05-5.4 parts of oxyde de nickel, 3-16 parts of silicon dioxide, 0.2-6.9 parts of boron oxide, 0.003 to 0.06 part of aluminium nitrate, 0.006 to 0.07 part of glass dust, 0.02 to 0.4 part of rare earth, 0.02-0.4 part of praseodymium system oxide, 0.3-10 parts of chromium sesquioxide, 0.5-4 parts of boric acid and 0.8-3.5 parts of silver nitrate. The invention also provides a preparation method of the zinc oxide varistor. Compared with the prior art, the preparation method provided by the invention has the advantage that procedures of pulp drying, calcining inside a kiln and grinding for an auxiliary additive are omitted; the pulp of the auxiliary additive is directly mixed with zinc oxide to form a raw material under high-speed stirring, procedures are reduced, energy is saved, moreover, secondary pollution caused by the auxiliary additive can be avoided.

Description

technical field [0001] The invention relates to the field of resistors, in particular to a zinc oxide varistor sheet and a preparation method thereof. Background technique [0002] Resistors are generally directly referred to as resistances in daily life. It is a current-limiting element. After the resistor is connected to the circuit, the resistance value of the resistor is fixed. Generally, there are two pins, which can limit the current through the branch it is connected to. A resistor whose resistance value cannot be changed is called a fixed resistor. Those with variable resistance are called potentiometers or variable resistors. An ideal resistor is linear, that is, the instantaneous current through the resistor is proportional to the instantaneous applied voltage. Variable resistors for voltage division. On the exposed resistor body, one or two movable metal contacts are pressed tightly. The position of the contacts determines the resistance between either end of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/112H01C17/00
CPCH01C7/112H01C17/00
Inventor 邱广茂
Owner 陆川县华鑫电子厂