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Coaxial high-current ceramic vacuum insulator based on non-uniform surface corrugations

A ceramic vacuum and insulator technology, applied in the direction of insulators, electrical components, circuits, etc., can solve the problems of low yield, difficult surface grooves, and reduced mechanical strength of ceramics

Active Publication Date: 2020-01-03
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because ceramics are brittle materials, the surface groove is difficult, the yield is low, and the mechanical strength of ceramics is reduced. The traditional surface groove method is difficult to be directly applied to ceramic high-current vacuum insulators.

Method used

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  • Coaxial high-current ceramic vacuum insulator based on non-uniform surface corrugations
  • Coaxial high-current ceramic vacuum insulator based on non-uniform surface corrugations
  • Coaxial high-current ceramic vacuum insulator based on non-uniform surface corrugations

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Embodiment 1

[0030] The design scheme of embodiment 1 is as follows: the insulating plate 2 selects 95% alumina ceramics for use, and the effective length of the ceramics along the surface is L 17 cm, substrate thickness D is 1.5 cm, inner radius R 1 is 2 cm, the outer radius R 2 is 19 cm; the length of the first non-corrugated area 21 l 1 =0.6 cm, the length of the second non-ripple area 25 l 5 =0.8 cm; the non-uniform corrugations on the surface are sinusoidal corrugations, and the length of the first shallow corrugated area is 22 l 2 =2.8 cm, corrugation period T 1 =1.4 cm, height H 1 = 1.6 cm, number of cycles N 1 =2, the crest structure has 221 periods t 11 =0.6 cm, height h 11 =0.9 cm, the period length of the trough structure is 222 t 12 =0.8 cm, height h 12 =0.7 cm; the length of the deep corrugated area 23 l 3 =8 cm, corrugation period T 2 =2 cm, height H 2 =1.8 cm, number of cycles N 2 =4, the crest structure has 231 periods t 21 =0.9cm, height h ...

Embodiment 2

[0031] The design scheme of embodiment 2 is as follows: the insulating plate 2 selects 95% alumina ceramics for use, and the effective length of the ceramics along the surface L 17 cm, substrate thickness D is 1.5 cm, inner radius R 1 is 2 cm, the outer radius R 2 is 19 cm; the length of the first non-corrugated area 21 l 1 =1 cm, the length of the second non-corrugated area is 25 l 5 =1 cm; the non-uniform corrugations on the surface are sinusoidal corrugations, and the length of the first shallow corrugated area is 22 l 2 =3.6 cm, corrugation period T 1 =1.8 cm, height H 1 = 1.8 cm, number of cycles N 1 =2, the crest structure has 221 periods t 11 =0.8 cm, height h 11 =0.9 cm, the period length of the trough structure is 222 t 12 =1 cm, height h 12 =0.7 cm; the length of the deep corrugated area 23 l 3 =7.8 cm, corrugation period T 2 =2 cm, height H 2 =2.1 cm, number of cycles N 2 =3, the crest structure has 231 periods t 21 =1.2 cm, height h...

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Abstract

The invention discloses a coaxial type high-current ceramic vacuum insulator based on surface non-uniform ripple, which aims at providing a vacuum insulator capable of blocking electron movement alonga surface and secondary electron avalanche process, and improving the surface breakdown field strength of the coaxial type ceramic insulator. The invention is in the shape of a disc as a whole and isformed by coaxially nesting and connecting a cathode, an insulating plate and an anode; The insulating plate is alumina ceramic, and the surface of the insulating plate in the vacuum working environment of the high-current diode is a first non-corrugated region, a non-uniform corrugated region and a second non-corrugated region from the inside to the outside from the central hole. The non-uniformripple region is composed of a first shallow ripple region, a deep ripple region, and a second shallow ripple region. The invention can prevent the electrons from moving along the anode facing, can bind the electrons crossing the wave crest structure, can block the surface movement of the electrons and the secondary electron avalanche process, weakens the ionization process of the surface desorption gas, and improves the surface breakdown field strength of the coaxial ceramic insulator.

Description

technical field [0001] The invention belongs to the technical field of high-current accelerators and pulse power, and in particular relates to a coaxial high-current ceramic vacuum insulator based on non-uniform surface corrugations. Background technique [0002] In the fields of pulse power technology and high-current accelerators, high-current vacuum insulators are mainly used for high-voltage insulation and isolation of the working medium of the pulse driving source and the vacuum environment of the electron beam load. When a high-current vacuum insulator is working, it is usually connected upstream to a pulse-forming line and downstream to a load such as a high-current diode. It usually needs to withstand high-voltage pulses of hundreds of kV or even MV, and pass high currents of several kA to tens of kA. Vacuum insulators usually break down at an electric field strength much lower than that of itself and a vacuum gap of the same size. Alumina ceramic vacuum insulators ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B17/36H01B17/42
CPCH01B17/36H01B17/42
Inventor 孙晓亮荀涛李伟张军杨汉武钟辉煌王日品
Owner NAT UNIV OF DEFENSE TECH