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Preparation method of non-linear composite material having adaptive uniform electric field

A uniform electric field and composite material technology, which is applied in the field of nonlinear composite material preparation, can solve problems such as uneven voltage distribution of insulation equipment or components, and achieve good insulation properties, uniform electric field strength, and reduced electric field strength.

Active Publication Date: 2013-03-06
TSINGHUA UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to propose a method for preparing nonlinear composite materials with self-adaptive uniform electric field to solve the problem of uneven voltage distribution of insulation equipment or components in high-voltage power transmission and transformation systems in the prior art, and to suppress the local high voltage of the insulation medium. The effect of the electric field intensity to realize the effective control of the uniformity of the electric field distribution

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  • Preparation method of non-linear composite material having adaptive uniform electric field

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[0026] The preparation method of the nonlinear composite material with adaptive uniform electric field effect proposed by the present invention comprises the following steps:

[0027] (1) Preparation of zinc oxide powder with pressure sensitive properties:

[0028] (a) Weigh raw materials according to the following mole percentages:

[0029] Zinc oxide 96.05mol%,

[0030] Bismuth oxide 0.7mol%,

[0031] Manganese oxide 0.5mol%,

[0032] Cobalt oxide 1mol%,

[0033] Chromium oxide 0.5mol%,

[0034] Antimony oxide 1.0mol%,

[0035] Aluminum oxide 0.25 mol%.

[0036] On the basis of the raw material formula of ZnO varistor used for the traditional surge arrester valve plate, the raw material formula proposed in the present invention optimizes the content of various dopants, so that the prepared ZnO powder has better nonlinear dielectric properties. Electrical properties, more suitable as a filler for nonlinear silicone rubber-based insulating composite materials.

[0037]...

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Abstract

The invention relates to a preparation method of a non-linear composite material having adaptive uniform electric field, belonging to the technical field of electric materials. The method comprises the following steps: using zinc oxide, bismuth oxide, manganese oxide, cobalt oxide, chrome oxide, antimony oxide and alumina as raw materials, mixing after weighing in proportion, adding alcohol in the mixture, grinding with a grinding ball prepared by pure silicon oxide, and drying and crushing the grinded slurry; adding a vulcanizing agent in methyl vinyl silicone rubber, dissolving with tetrahydrofuran to obtain a mixed solution, mixing the mixed solution with zinc oxide pressure-sensitive powder to obtain a mixture, and carrying out hot forming on the mixture to obtain the non-linear composite material. The prepared non-linear composite material disclosed herein can effectively reduce electric field intensity when being applied in high voltage power transmission and transformation system insulation parts having strong nonuniform electric field, and can keep good insulation characteristic in low electric field intensity regions.

Description

technical field [0001] The invention relates to a preparation method of a nonlinear composite material with an adaptive uniform electric field effect, and belongs to the technical field of electrical materials. Background technique [0002] In high-voltage, ultra-high-voltage and even UHV AC-DC power transmission systems (referred to as high-voltage power transmission and transformation systems), insulation is one of the most critical core issues. The higher the system voltage level, the greater the importance and difficulty of insulation problems. more and more obvious. The insulation equipment or components in the high-voltage power transmission and transformation system often bear extremely uneven voltage distribution, such as the insulation part of the transmission cable terminal, the high-voltage end part of various insulators, etc., the electric field strength they withstand is far greater than It exceeds the average value of the overall electric field strength, and e...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/622
Inventor 胡军谢竟成何金良张波曾嵘余占清殷禹
Owner TSINGHUA UNIV
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