Zinc oxide resistor disc and manufacturing method thereof

A zinc oxide resistor, zinc oxide technology, applied in the direction of varistor, varistor core, etc., can solve the problem of difficulty in ensuring high gradient and high current characteristics of zinc oxide resistor, insufficient zinc oxide grain growth, Affecting the performance of zinc oxide resistors and other issues, to achieve the effect of optimizing the sintering temperature curve, inhibiting excessive grain growth, and reducing dopant volatilization

Active Publication Date: 2015-12-02
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the sintering temperature is too low or the sintering time is too short, it will lead to insufficient growth of zinc oxide grains; A large number of impurities volatilize, which also affects the performance of zinc oxide resistors
The current sintering method is difficult to control, and it is difficult to ensure that the produced zinc oxide resistors have high gradient and high flow characteristics

Method used

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  • Zinc oxide resistor disc and manufacturing method thereof
  • Zinc oxide resistor disc and manufacturing method thereof

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Embodiment 1

[0034] A zinc oxide resistance sheet of the present invention is formed by sintering the following mole fractions of raw materials: zinc oxide: 90%, cobalt oxide: 1.1%, chromium oxide: 1.3%, silicon oxide: 1.2%, bismuth oxide: 1.4%, Nickel oxide: 0.8 mol, manganese oxide: 0.8%, antimony oxide: 1.4%, yttrium oxide 0.8% and zirconium oxide 1.2%.

[0035] A preparation method of the above-mentioned zinc oxide resistance sheet of the present embodiment, comprising the following steps:

[0036] (1) Ingredients: Weigh the following raw materials according to mole percentage: zinc oxide: 90%, cobalt oxide: 1.1%, chromium oxide: 1.3%, silicon oxide: 1.2%, bismuth oxide: 1.4%, nickel oxide: 0.8mol, oxide Manganese: 0.8%, Antimony Oxide: 1.4%, Yttrium Oxide 0.8%, and Zirconia 1.2%. A large scale balance and a precision balance are used for weighing to accurately control the proportion of each mixed material.

[0037] (2) Wet milling and granulation: add the additives described in step...

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Abstract

The invention discloses a zinc oxide resistor disc and a manufacturing method thereof. The zinc oxide resistor disc comprises, by the molar fraction, 95.5% to 99% of zinc oxide base materials, 0.5% to 1.9% of yttrium oxide and 0.5% to 2.6% of zirconium oxide in a sintered mode. The manufacturing method includes the following steps: 1, material dosing; 2, wet grinding pelleting; 3, hydraulic disc forming; 4, segmented sintering. The zinc oxide resistor disc has the advantages of being high in electric potential gradient and large in current flowing capacity; compared with a zinc oxide resistor disc manufactured with a conventional method, the zinc oxide resistor disc manufactured with the manufacturing method has the advantages that the electric potential gradient is increased by near 1 / 4, and the current flowing capacity is improved by 1 / 3.

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 with high potential gradient and large flow capacity and a preparation method thereof. Background technique [0002] The rapid development of UHV has put forward higher and higher requirements for the miniaturization and large capacity of power equipment. Zinc oxide varistors are the core components of zinc oxide arresters, but the current potential gradient and flow capacity of zinc oxide resistors are relatively low. Using zinc oxide varistors with high potential gradient and large flow capacity to assemble metal oxide arresters in UHV transmission systems can reduce their weight, height, and volume, and further improve the safety and reliability of arresters and even the entire power system. sex. [0003] The potential gradient and flow capacity of zinc oxide resistors are determined by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622H01C7/112
Inventor 方针吴伟陆佳政赵纯李波张红先
Owner STATE GRID CORP OF CHINA
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