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Preparation method for carbon fiber annular cathode

A ring-shaped cathode and carbon fiber technology, which is applied in the manufacture of cold cathodes, electrode systems, and discharge tubes/lamps, etc., can solve problems such as the difficulty in preparing carbon fiber ring-shaped cathodes, and achieve good electron emission effects and stable current-voltage waveforms , the effect of fast start-up time

Inactive Publication Date: 2013-04-24
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

The technology provided in the above documents is mainly suitable for the preparation of flat or columnar carbon fiber cathodes, and it is difficult to prepare carbon fiber annular cathodes

Method used

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  • Preparation method for carbon fiber annular cathode
  • Preparation method for carbon fiber annular cathode
  • Preparation method for carbon fiber annular cathode

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Embodiment

[0032] A kind of preparation method of the carbon fiber annular cathode that outer diameter is 39mm, comprises the following steps:

[0033] 1. Fabrication of carbon fiber sheet cathode material:

[0034] (1) Prepare a piece of T300 carbon fiber orthogonally woven cloth with a thickness of about 0.2mm, cut it into a rectangular carbon fiber cloth 1 of 122.5mm×12mm along the direction of warp and weft parallel to the carbon fiber orthogonally woven cloth, and then two pieces Copper foils with a thickness of 0.05mm are respectively cut into rectangular copper foils 2 of 122.5mm×10mm;

[0035] (2) Coat the surfaces of two rectangular copper foils 2 with epoxy resin adhesive, each copper foil 2 is only coated on one surface, and the rectangular carbon fiber cloth 1 and two copper foils 2 are combined to form a copper foil 2 / carbon fiber Three-layer composite sandwich structure of cloth 1 / copper foil 2, two pieces of copper foil 2 are located on the outside, sandwiching carbon fiber...

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Abstract

The invention discloses a preparation method for a carbon fiber annular cathode. The carbon fiber annular cathode is made through directly installing and clamping a fashioned carbon fiber annular cathode material on a cathode base and the fashioned carbon fiber annular cathode material is made through bending a carbon fiber sheet cathode material to an annular shape along the length direction. The carbon fiber sheet cathode material is of a three-layer composite sandwich-type structure, and the three-layer composite sandwich-type structure comprises two metal foil sheets on the outer sides and carbon fiber cloth clamped between the two metal foil sheets. By means of the preparation method for the carbon fiber annular cathode, the carbon fiber annular cathode is enabled to have strong designability, evenly distributed carbon fibers along the axial direction of an electron emission end guarantee the directionality and uniformity of emitted electrons. The preparation method for the carbon fiber annular cathode is simple in technique, low in cost, high in operability and capable of meeting emission requirements on property of different electrons.

Description

technical field [0001] The invention relates to a preparation method of a practical carbon fiber cathode, in particular to a preparation method of a carbon fiber annular cathode, which has important practical value in the fields of high-current pulsed electron beam technology and application, high-power microwave and the like. Background technique [0002] The generation of high-quality long-pulse high-current electron beams has always been one of the important goals in the field of high-current pulsed electron beam technology and application research, and is also one of the key technologies for the development of high-power microwave (HPM: High Power Microwave) sources. There are mainly three types of practical cathodes that generate high-current electron beams: flat, columnar, and annular. Flat and columnar cathodes have large emission areas, large emission currents, and low current densities; annular cathodes have small emission areas, small emission currents, and high cu...

Claims

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Application Information

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IPC IPC(8): H01J9/02
Inventor 万红李顺白书欣串俊兵周帆
Owner NAT UNIV OF DEFENSE TECH
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