Lightning arrester zinc oxide varistor and preparation method thereof

A technology of zinc oxide resistors and lightning arresters, which is applied in the manufacture of resistors, resistors, varistors, etc., can solve the problems of reducing the flow capacity of resistors and affecting the uniformity of resistor components, and achieve uniform and stable internal structures. Strong ability to withstand high current impact and reduce particle size

Inactive Publication Date: 2018-06-12
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The potential gradient and flow capacity of the zinc oxide resistor are related to the grain size of the resistor, the number of grain boundary layers and the type of dopant. The more grains and grain boundaries per unit thickness, the higher the potential gradient. Therefore, the uniform refinement of the grain is the key to improving the potential gradient and flow capacity of the resistor. In order to prepare high-performance zinc oxide resistors, at present, many resistor recipes need to add silicon dioxide to increase their voltage gradient, but silicon dioxide It will also affect the uniformity of the resistor sheet components and reduce the flow capacity of the resistor sheet

Method used

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  • Lightning arrester zinc oxide varistor and preparation method thereof
  • Lightning arrester zinc oxide varistor and preparation method thereof
  • Lightning arrester zinc oxide varistor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A zinc oxide resistor sheet for a lightning arrester, the raw materials are composed of the following mass percentages: 90% zinc oxide, 0.5% calcium oxide, 4% bismuth trioxide, 4% antimony trioxide, 0.5% manganese carbonate, and 1% aluminum nitrate.

[0035] The preparation method of the zinc oxide resistance sheet for the lightning arrester comprises the following steps:

[0036] (1) Ingredients: Weigh the following raw materials: zinc oxide 9kg, calcium oxide 0.05kg, bismuth trioxide 0.4kg, antimony trioxide 0.4kg, manganese carbonate 0.05kg, aluminum nitrate 0.1kg;

[0037] (2) Grinding: Add the weighed raw materials into 20kg of distilled water and stir evenly, then put into a sand mill and grind for 1.5h;

[0038] (3) Granulation: add polyvinyl alcohol of 1kg mass fraction to the slurry after grinding, then put into the granulator and spray granulation;

[0039] (4) Containing water: add 0.25kg of distilled water to the granulated powder, and stir well;

[0040] ...

Embodiment 2

[0046] A zinc oxide resistance sheet for a lightning arrester, the raw materials are composed of the following mass percentages: 85% zinc oxide, 0.1% calcium oxide, 7% bismuth trioxide, 7% antimony trioxide, 0.4% manganese carbonate, and 0.5% aluminum nitrate.

[0047] The preparation method of the zinc oxide resistance sheet for the lightning arrester comprises the following steps:

[0048] (1) Ingredients: Weigh the following raw materials: zinc oxide 8.5kg, calcium oxide 0.01kg, bismuth trioxide 0.7kg, antimony trioxide 0.7kg, manganese carbonate 0.04kg, aluminum nitrate 0.05kg;

[0049] (2) Grinding: Add the weighed raw materials into 20kg of distilled water and stir evenly, then put into a sand mill and grind for 1.5h;

[0050] (3) Granulation: add polyvinyl alcohol of 1kg mass fraction to the slurry after grinding, then put into the granulator and spray granulation;

[0051] (4) Containing water: add 0.25kg of distilled water to the granulated powder, and stir well;

...

Embodiment 3

[0058] A zinc oxide resistance sheet for lightning arrester, the raw materials are composed according to the following mass percentages: 88% of zinc oxide, 0.3% of calcium oxide, 5% of bismuth trioxide, 5% of antimony trioxide, 0.7% of manganese carbonate, and 1% of aluminum nitrate.

[0059] The preparation method of the zinc oxide resistance sheet for the lightning arrester comprises the following steps:

[0060] (1) Ingredients: Weigh the following raw materials: zinc oxide 8.8kg, calcium oxide 0.03kg, bismuth trioxide 0.5kg, antimony trioxide 0.5kg, manganese carbonate 0.07kg, aluminum nitrate 0.1kg;

[0061] (2) Grinding: Add the weighed raw materials into 20kg of distilled water and stir evenly, then put into a sand mill and grind for 1.5h;

[0062] (3) Granulation: add polyvinyl alcohol of 1kg mass fraction to the slurry after grinding, then put into the granulator and spray granulation;

[0063] (4) Containing water: add 0.25kg of distilled water to the granulated powde...

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Abstract

The invention discloses a lightning arrester zinc oxide varistor and a preparation method thereof. The lightning arrester zinc oxide varistor is prepared by sintering the raw materials of 85-90% of zinc oxide, 0.1-0.5% of calcium oxide, 4-7% of bismuth trioxide, 4-7% of antimony trioxide, 0.1-1% of manganese carbonate and 0.1-1% of aluminum nitrate. According to the lightning arrester zinc oxide varistor, the added calcium oxide can be effectively wrapped outside zinc oxide grains during sintering to inhibit grain growth, reduce the size of the grains and further improve the voltage gradient and the flow capacity of the grains. The lightning arrester zinc oxide varistor is a system prepared from the zinc oxide, the calcium oxide, the bismuth trioxide, the antimony trioxide, the manganese carbonate and the aluminum nitrate, thereby being low in raw material cost; the prepared lightning arrester zinc oxide varistor is uniform and stable in internal structure high in large current impactresistance.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical sensitive ceramic materials, and in particular relates to a zinc oxide resistance sheet for a lightning arrester and a preparation method thereof. Background technique [0002] In recent years, with the development of power technology, the voltage level of substations is getting higher and higher. Due to the limitation of the site, etc., the electrical equipment must be miniaturized. The arrester is a main equipment for lightning protection in the power system, and zinc oxide The resistor sheet is the core component of the arrester. The zinc oxide resistor sheet is a functional composite ceramic material. Due to its excellent nonlinear resistance characteristics and large flow capacity, it plays an important role in limiting overvoltage in the zinc oxide arrester. The amplitude and the important role of absorbing overvoltage energy. Therefore, reducing the volume and weight of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/112H01C7/12H01C17/00H01C17/30
CPCH01C7/12H01C7/112H01C17/00H01C17/30
Inventor 陆佳政潘碧宸吴传平周特军梁平陈宝辉
Owner STATE GRID HUNAN ELECTRIC POWER
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