Non-linear electrically conductive composite material and preparation method and application thereof, and lightning arrester

A composite material, non-linear technology, applied in resistors, non-adjustable metal resistors, overvoltage protection resistors, etc., to achieve the effect of solving uneven electric field distribution and alleviating deterioration problems

Active Publication Date: 2019-04-30
HUBEI UNIV OF TECH +1
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Problems solved by technology

[0004] In view of the above technical problems, the present invention provides a nonlinear conductance composite material and its preparation method and application as well as a lightning arrester, and obtains a nonlinear conductance composite material whose conductivity parameter changes adaptively with the strength of the space field, and alleviates the external insulation of the arrester. Material degradation due to uneven field strength

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  • Non-linear electrically conductive composite material and preparation method and application thereof, and lightning arrester
  • Non-linear electrically conductive composite material and preparation method and application thereof, and lightning arrester
  • Non-linear electrically conductive composite material and preparation method and application thereof, and lightning arrester

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Embodiment Construction

[0019] The present invention will be further described below in combination with specific embodiments.

[0020] Using zinc oxide varistor powder and liquid silicone rubber as raw materials, according to the mass fraction, that is, the zinc oxide varistor powder accounts for 50%-70% of the mass fraction of the entire compound, and the zinc oxide varistor powder is based on ZnO as the main body, with a certain trace amount of Ni 2 o 3 、 Bi 2 o 3 , MnCO 3 、Cr 2 o 3 , MnO2, Co 2 o 3 , Sb 2 o 3 . The steps of preparation are as follows:

[0021] 1) Sintering: The ZnO pressure-sensitive powder is placed in a muffle furnace for sintering at the temperature setting shown in Table 1.

[0022] Table 1 Temperature rise settings

[0023]

[0024] 2) Grinding and sieving: Use an agate grinder to grind the sintered ZnO pressure-sensitive powder, and then sieve it with a 200-mesh and 280-mesh sieve to obtain a ZnO pressure-sensitive powder with a uniform particle size of 75-5...

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Abstract

The invention relates to the technical field of insulating materials and in particular, relates to a non-linear electrically conductive composite material, and a preparation method and an applicationthereof, and a lightning arrester. Zinc oxide pressure-sensitive resistor powder is placed in a muffle furnace and sintered, ground and sieved, obtained zinc oxide pressure-sensitive resistor powder with uniform particle size of 75-55 microns is mixed with liquid silicone rubber according to the mass ratio, the mixture is evenly stirred and poured into a mould, and vacuumization is continuously performed in a vacuum drying box; and vulcanization is performed at the temperature of 150 DEG C for 20 min. By changing the characteristics of an insulating material itself, the insulating material becomes the non-linear electrically conductive composite material having the conductivity parameter adaptively varying with the space field intensity through treatment; the non-linear electrically conductive composite material is used for replacing silicone rubber jackets at the high-voltage terminal and the ground terminal of the lightning arrester; the electric field with extremely uneven distribution is intelligently adjusted and controlled by using the non-linear electrically conductive characteristics, a new additional structure does not need to be added, the problem of uneven distribution of an electric field in the outer space of the lightning arrester is solved, and the deterioration problem caused by uneven field intensity of the external insulating material of the lightning arresteris solved.

Description

technical field [0001] The invention relates to the technical field of insulating materials, in particular to a nonlinear conductance composite material, a preparation method and application thereof, and a lightning arrester. Background technique [0002] Insulation safety has always been the most important factor in high-voltage power transmission and transformation systems. It is extremely important to protect the safe and stable operation of various electrical equipment in high-voltage power transmission and transformation systems from operating overvoltage and atmospheric overvoltage, and composite gapless oxidation As a protective device for limiting overvoltage, zinc arrester has such a function, and it is widely used in today's power transmission and transformation systems, but its external silicone rubber insulation material has been subjected to uneven electric fields for a long time. Excessive electric field intensity leads to accelerated deterioration of the silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/32C08K3/22C08L83/04H01C1/02H01C7/12C04B111/90
CPCC04B26/32C04B2111/00844C04B2111/90C08K3/22C08K2003/2296H01C1/02H01C7/123C04B22/06C04B14/30C04B14/26C04B14/307C04B22/02C08L83/04
Inventor 刘凌云张吴欣柳建军王晓光王远付波
Owner HUBEI UNIV OF TECH
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