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Composite insulating material and preparation method of composite insulating material

A composite insulation and mixed powder technology, applied in organic insulators, plastic/resin/wax insulators, etc., can solve the problems of high water absorption, insufficient modulus and strength, and harsh technological conditions of nylon 1010 insulators, and achieve low surface The effect of secondary electron emission coefficient, low cost and simple process

Inactive Publication Date: 2011-08-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of amide polar groups, nylon 1010 insulators have high water absorption, poor dielectric stability, and insufficient modulus and strength.
In some applications that require special-shaped nylon insulators, resin casting and solidification methods are generally used to prepare nylon as the continuous phase insulators. Provide a temperature higher than 200°C under high temperature conditions, the process technical conditions are relatively harsh, and the process is relatively cumbersome and the cost is high

Method used

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  • Composite insulating material and preparation method of composite insulating material
  • Composite insulating material and preparation method of composite insulating material
  • Composite insulating material and preparation method of composite insulating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Nylon 1010 powder, nano-titanium oxide powder, and fluorphlogopite powder were dehydrated and dried at 110°C for 5 hours, respectively, and then mixed according to the mass percentage of 66%: 25.5%: 8.5%, and a certain amount of anhydrous Ethanol and alumina ceramic balls (about 4mm in diameter) were put into a ball mill for wet ball milling for 24 hours. After the ball milling, the mixed system was put into a vacuum oven at 80°C for 10 -1 Pa vacuum degree, 6 hours, solvent ethanol is completely volatilized, obtains the mixed powder of nylon 1010-nanometer titanium dioxide-fluorine phlogopite that mixes well.

[0033] Put the mixed powder into an electric heating mold, and press it into an insulator with a certain shape with a powder tablet press. When the powder is pressed into tablets, the heating temperature is controlled at 240°C, and the pressure is 3Mpa. When pressing each time, the pressure is maintained and cooled to 190°C, and then the pressure is released to z...

Embodiment 2

[0036] The preparation process was the same as in Example 1, except that the mass percent ratio of nylon 1010 powder, nano-titanium dioxide, and fluorphlogopite powder was 66.5%:30%:3.5%, and the pressure was 5Mpa when the powder was pressed into tablets.

[0037] The flashover voltage of the pressed sample is higher than that of the comparison sample pressed from pure nylon 1010 powder. The data are shown in Table 1.

Embodiment 3

[0039] The preparation process was the same as in Example 1, except that the mass percent ratio of nylon 1010 powder, nano-titanium dioxide, and fluorphlogopite powder was 72.5%: 20%: 7.5%, and the pressure when the powder was pressed into tablets was 4Mpa.

[0040] The flashover voltage of the pressed sample is higher than that of the comparison sample pressed from pure nylon 1010 powder. The data are shown in Table 1.

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PUM

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Abstract

The invention provides a composite insulating material. Nylon is used as a matrix. Nano titanium dioxide and fluorophlogopite are used as doped phases. The content of nylon is in the range of 60 to 90 weight percent. The content of nano titanium dioxide is not more than 30 weight percent. The content of fluorophlogopite is not more than 10 weight percent. Preferably, the content of nylon is in the range of 65 to 80 weight percent, the content of nano titanium dioxide is in the range of 10 to 30 weight percent, and the content of fluorophlogopite is in the range of 3 to 10 weight percent. The composite insulating material has high vacuum flashover voltage, low surface secondary electron yield, low permittivity and excellent weather resistance. The invention also provides a preparation method of the composite insulating material.

Description

technical field [0001] The invention relates to a composite insulation material, in particular to a nylon insulator composite material with good vacuum insulation performance. The present invention also relates to the preparation process of the above-mentioned composite material. Background technique [0002] Surface flashover phenomenon is an important problem in vacuum electrical equipment. Insulation flashover makes the withstand voltage capacity of insulating materials in vacuum much lower than the vacuum gap at the same distance. The bottleneck of the highest voltage that the device can withstand. With the increasingly prominent role of high-power pulse technology in the national economy and national defense construction, many large-scale cutting-edge equipment such as narrow-pulse high-power microwave sources, high-current particle beam accelerators, emerging high-power pulse lasers, etc., in order to reduce the size and weight of equipment At the same time, to ensur...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/06C08K3/22C08K3/34H01B3/30
Inventor 白亚奎凌云汉白新德
Owner TSINGHUA UNIV
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