High-dielectric-constant silicon rubber and preparation method thereof

A technology with high dielectric constant and giant dielectric constant, which is applied in the field of high dielectric constant silicone rubber and its preparation, can solve the problems of large potential distribution drop, etc., to ease the concentration of electric field intensity, optimize electric field distribution, and reduce operation failures The effect of probability

Active Publication Date: 2012-06-20
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of high dielectric constant silicone rubber and its preparation method, to overcome the defect that the existing silicone rubber has a large drop in potential distribution at the high voltage end when it is used in a high voltage environment

Method used

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  • High-dielectric-constant silicon rubber and preparation method thereof
  • High-dielectric-constant silicon rubber and preparation method thereof
  • High-dielectric-constant silicon rubber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Take 4.4kg of methyl vinyl silicone rubber and 0.6kg of fumed silica as a reinforcing filler. Add in three times during the rubber mixing process. During the rubber mixing process, add ceramic powder CCTO in three equal parts for a total of 7.50kg. At the same time, add 100 mL of alkoxy crosslinking agent, 50 mL of vinyl liquid silicone rubber, and 50 mL of hydroxyl silicone oil. After mixing uniformly in an internal mixer at 60° C., vacuum kneading was carried out for 45 minutes to obtain a silicone rubber composite material. The dielectric properties of the vulcanized product (the vulcanizing agent is DCP, the added mass is 50g, the same as in the following examples) are tested, and the real dielectric constant at 50Hz is 7.06. figure 1 It can be seen that the silicon rubber material of this embodiment can optimize the distribution of the electric field and alleviate the concentration of the electric field intensity at the high-voltage part, as shown in the spectrum o...

Embodiment 2

[0043] Take 4.4kg of methyl vinyl silicone rubber, 0.6kg of fumed silica as a reinforcing filler, add in three times during the rubber mixing process, add ceramic powder CCTO in batches during the rubber mixing process, a total of 8.57kg, and 0.71kg of conductive carbon black, While adding the powder, add 100mL of alkoxy crosslinking agent, 50mL of vinyl liquid silicone rubber, and 50mL of hydroxyl silicone oil. After mixing uniformly in an internal mixer at 60° C., vacuum kneading was carried out for 45 minutes to obtain a silicone rubber composite material. The dielectric properties of the vulcanized product were tested, and the real dielectric constant at 50 Hz was 8.89. figure 2 In fact, the variation spectrum of permittivity with frequency.

Embodiment 3

[0045] Take 4.4kg of methyl vinyl silicone rubber, 0.6kg of fumed silica as a reinforcing filler, and add it in three times during the rubber mixing process. During the rubber mixing process, add ceramic powder CCTO in batches totaling 9.68kg, conductive carbon black 1.45kg, While adding the powder, add 150mL of alkoxy crosslinking agent, 50mL of vinyl liquid silicone rubber, and 50mL of hydroxyl silicone oil. After mixing uniformly in an internal mixer at 60° C., vacuum kneading was carried out for 45 minutes to obtain a silicone rubber composite material. The dielectric properties of the vulcanized product were tested, and the real dielectric constant at 50 Hz was 28.50. image 3 In fact, the variation spectrum of permittivity with frequency.

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Abstract

The invention belongs to the technical field of electrical insulating materials and particularly relates to a high-dielectric-constant silicon rubber and a preparation method thereof. The high-dielectric-constant silicon rubber is prepared from the following raw materials in part by weight: 17 to 50 parts of raw silicon rubber, 15 to 83 parts of a giant-dielectric-constant ceramic powder, 0 to 25 parts of conductive or semi-conductive powder, 0 to 15 parts of reinforcing filler, and 1 to 3 parts of ingredient. When used in a high-voltage environment, the high-dielectric-constant silicon rubber provided by the invention can optimize electric-field distribution, relieve electric field intensity concentration in a high-voltage part and reduce operation faults.

Description

technical field [0001] The invention belongs to the technical field of electrical insulation materials, in particular to a high dielectric constant silicone rubber and a preparation method thereof. Background technique [0002] Generally, it is customary to call straight-chain polysiloxane (silicone rubber raw rubber) as silicone rubber. Silicone rubber is based on Si-O alternating main chains and side groups as organic groups (such as methyl, ethyl, vinyl, phenyl, etc.) etc.) composed of linear semi-inorganic polymer materials, it has both the characteristics of organic polymers and inorganic polymers, so it has many unique properties, such as high and low temperature resistance, UV resistance, radiation resistance, weather resistance, Hydrophobic, non-combustible, electrical insulation, high air permeability, physiological inertia, etc. Therefore, silicone rubber has been widely used in aviation, aerospace, electrical and electronic, light industry, machinery, constructio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/07C08L83/08C08K13/02C08K13/06C08K3/24C08K3/22C08K3/14C08K3/08C08K3/36H01B3/46
Inventor 曹宏伟闫东卢明陈瑞
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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