High gradient surface microstrip insulator and its preparation method

Abstract

The invention discloses a high-gradient surface micro-strip insulator and a preparation method thereof, which are applied to the field of high-voltage insulating, and mainly solve the problems that a preparation process is complicated, the insulator reliability is poor, the surface breakdown voltage resistance is low, and the requirements on vacuum insulating of a high-voltage device is difficult to meet in the prior art. Periodic microgroove arrays are engraved in the surface of an insulator body; metal micro-strips which grow in situ are arranged in the microgrooves. The preparation method comprises the following steps: [1] machining the insulator body according to designed insulator outline dimensions; [2] engraving the periodic microgroove arrays in the surface of the insulator body; [3] preparing PdC12 / PVP / ethyl alcohol or AgNO3 / PVP / ethanol adhesive solution, and naturally drying the engraved insulator body after the engraved insulator body is soaked or coated; [4] forming metal particles on the surfaces of the microgrooves by adopting a laser induced activating method; [5] growing the metal micro-strips in the microgrooves in situ by adopting a chemical plating method. The high-gradient surface micro-strip insulator and the preparation method thereof can be applied to the field of insulating of sophisticated equipment, such as a high-power microwave technology, a high-power laser and a dielectric-wall accelerator.

Description

technical field [0001] The invention relates to the technical field of high-voltage insulation, in particular to a high-gradient surface microstrip insulator and a preparation method thereof. Background technique [0002] Surface flashover has been a difficult problem in the electrical field since it was discovered in the 1950s and 1960s. At this stage, with the development of cutting-edge equipment such as high-power microwave technology, high-power lasers, and dielectric wall accelerators, the insulation ability of materials has been raised. With higher requirements, more and more attention has been paid to how to effectively solve the flashover problem along the surface. [0003] To solve this problem, people design high gradient insulators (high gradient insulator, HGI) according to the theory of secondary electron emission. The concept of HGI insulation structure was first proposed by Smith and Gray in the United States. Lawrence Livermore National Laboratory has carri...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems existing in the prior art, such as complex preparation process, poor reliability of insulators, low surface breakdown voltage resistance, and difficulty in meeting the vacuum insulation requirements of high-voltage devices, and provide a high-gradient surface microstrip insulator and the preparation method thereof, the preparation process of the method is simple, the produced insulator has stable quality and high surface breakdown resistance voltage, and can meet the requirements of high-voltage devices for vacuum insulation

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