Raw material formulation of high-gradient non-linear resistance card and manufacturing method thereof

A technology of non-linear resistors and manufacturing methods, applied in the direction of resistor manufacturing, resistors, varistors, etc., can solve the problems that cannot fully meet the requirements of ultra-high voltage transmission and distribution arrester equipment, and achieve space volume reduction, reduce environmental pollution, The effect of saving raw materials

Inactive Publication Date: 2010-04-28
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The research on high-gradient resistors is to increase the potential gradient from the traditional potential gradient of 200V / mm. The potential gradient of existing high-gradient resistors can reach 300V / mm, which can partially meet the needs of miniaturized arresters, but still cannot fully meet the needs of ultra-high-gradient resistors. The need for UHV power transmission and distribution arrester equipment

Method used

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  • Raw material formulation of high-gradient non-linear resistance card and manufacturing method thereof
  • Raw material formulation of high-gradient non-linear resistance card and manufacturing method thereof
  • Raw material formulation of high-gradient non-linear resistance card and manufacturing method thereof

Examples

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Embodiment 1

[0017] The present embodiment adopts the raw material formula of the high-gradient non-linear resistor sheet, and its molar percentage composition is: wherein Bi 2 o 3 : 0.5-1.5%, Co 2 o 3 : 0.7-1.2%, MnCO 3 : 0.4-0.9%, Sb 2 o 3 : 0.7-1.5%, Cr 2 o 3 : 0.2-0.8%, SiO 2 : 0.5-1.1%, Y 2 o 3 0.3-1.2% additives; the balance is mainly ZnO.

[0018] In this embodiment, the manufacturing method is carried out according to the raw material formula of the above-mentioned high-gradient non-linear resistance sheet, which specifically includes the following steps:

[0019] First, weigh the components of the additive and the main material ZnO, then mix the components of the additive through ball milling, heat and dry them, put them into a ceramic sagger, calcine at 800°C for 1 hour, cool naturally, and pulverize to form fine additive powder ;

[0020] Secondly, add additive powder, main material ZnO, organic binder-polyvinyl alcohol (PVA), polyacrylate ammonium dispersant, water...

Embodiment 2

[0029] The present embodiment adopts the raw material formula of the high-gradient non-linear resistor sheet, and its molar percentage composition is: wherein Bi 2 o 3 : 0.5-1.5%, Co 2 o 3 : 0.7-1.2%, MnCO 3 : 0.4-0.9%, Sb 2 o 3 : O.7-1.5%, Cr 2 o 3 : 0.2-0.8%, SiO 2 : 0.5-1.1%, Y 3 o 3 0.3-1.2% additives; the balance is mainly ZnO.

[0030] In this embodiment, the manufacturing method is carried out according to the raw material formula of the above-mentioned high-gradient non-linear resistance sheet, which specifically includes the following steps:

[0031] First, weigh the components of the additive and the main material ZnO, then mix the components of the additive through ball milling, heat and dry them, put them into a ceramic sagger, calcine at 800°C for 1 hour, cool naturally, and pulverize to form fine additive powder ;

[0032] Secondly, in the mixing tank, add additive powder, main material ZnO, organic binder, dispersant, water and Al(NO 3 ) 3 9H 2 O...

Embodiment 3

[0041] The present embodiment adopts the raw material formula of the high-gradient non-linear resistor sheet, and its molar percentage composition is: wherein Bi 2 o 3 : 1.0%, Co 2 o 3 : 1.0%, MnCO 3 : 0.6%, Sb 2 o 3 : 1.0%, Cr 2 o 3 : 0.5%, SiO 2 : 1.0%, Y 2 o 3 1.0%, the balance is mainly ZnO. In the manufacturing process of the resistor chip, the green body is a cylinder with a diameter of 36 mm to 126 mm and a height of 27 mm; after removing the organic binder and dispersant, it is sintered at 1100 ° C or 1200 ° C for 4 hours to obtain a resistor chip sintered body, and others The steps are the same as those in Examples 1 and 2, and the non-linear characteristics of the manufactured resistor sheet are measured, and the measurement results are shown in Table 3 and Table 4.

[0042] table 3:

[0043] serial number

[0044] Table 4:

[0045] serial number

[0046] serial number

[0047] It can be seen from Table 3 and Table 4 that t...

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Abstract

The invention relates to the manufacturing field of non-linear metal oxide lightning arresters and discloses a raw material formulation of high-gradient non-linear resistance card and a manufacturing method thereof suitable for small-sized metal oxide lightning arrester of extra-high voltage power equipment. The raw material formulation of high-gradient non-linear resistance card comprises the following components according to mol percentages: additives comprising 0.5-1.5 mol% of Bi2O3, 0.7-1.2 mol% of Co2O3, 0.4-0.9 mol% of MnCO3, 0.7-1.5 mol% of Sb2O3, 0.2-0.8 mol% of Cr2O3, 0.5-1.1 mol% of SiO2, 0.3-1.2 mol% of Y2O3, and the remained ZnO as the main material. The manufacturing method thereof comprises the following steps: preparing additive; ball milling; sintering; mixing ZnO and additive; mixing dispersant; spraying and granulating; forming; sintering; polishing card; thermally processing; spraying aluminum; forming the organic insulated layer.

Description

technical field [0001] The invention relates to the field of manufacturing nonlinear metal oxide arresters, in particular to a raw material formula and a manufacturing method of a high-gradient nonlinear resistance sheet, which are suitable for miniaturized metal oxide arresters for ultra-ultra-high voltage power equipment. Background technique [0002] With the development of power technology, the voltage level of substations is getting higher and higher, and the expansion of the site is subject to more and more restrictions. It is necessary to miniaturize electrical equipment, and arresters are one of them. In order to reduce the size of the arrester, it is necessary to reduce the volume and weight of the resistive core of the arrester, and increasing the potential gradient of the resistive sheet is an effective technical means to solve this problem. [0003] The research on high-gradient resistors is to increase the potential gradient from the traditional potential gradie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/622H01C7/112H01C17/30
Inventor 王玉平马军
Owner CHINA XD ELECTRIC CO LTD
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