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Field emission cathode and preparation method thereof

A field emission cathode and nanosheet technology, applied in the field of field emission, can solve problems such as poor emission stability of the emission cathode, and achieve the effects of easy realization of process conditions, stable emission current, and simple process flow

Pending Publication Date: 2020-12-08
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the present invention provides a field emission cathode and a preparation method thereof to solve the problem of poor emission stability of the existing nanomaterial field emission cathode

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  • Field emission cathode and preparation method thereof
  • Field emission cathode and preparation method thereof
  • Field emission cathode and preparation method thereof

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Embodiment Construction

[0025] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in and described with reference to the drawings are merely exemplary, and the invention is not limited to these embodiments.

[0026] Here, it should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps that are closely related to the solution according to the present invention are shown in the drawings, while those related to the present invention are omitted. Other details are not relevant to the invention.

[0027] Embodiments of the present invention firstly provide a field emission cathode, such as figure 1 As shown, t...

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Abstract

The invention provides a field emission cathode. The field emission cathode comprises a conductive substrate and a Ti3C2 nanosheet thin film layer formed on the conductive substrate. The preparation method of the field emission cathode comprises the following steps: providing a conductive substrate; preparing a Ti3C2 nanosheet dispersion liquid; and coating the Ti3C2 nanosheet dispersion liquid onthe conductive substrate, and forming a Ti3C2 nanosheet thin film layer on the conductive substrate. According to the field emission cathode provided by the invention, the bombardment damage of cations can be better resisted, the integrity of the structure is maintained, more stable emission current is obtained, and the preparation method of the field emission cathode has the advantages of simpleprocess flow and easy realization of process conditions, and is beneficial to large-scale industrial application.

Description

technical field [0001] The invention belongs to the technical field of field emission, and in particular relates to a field emission cathode and a preparation method thereof. Background technique [0002] Vacuum electronic devices are widely used in communication, space technology, safety detection, medical imaging and other fields. The core component of a vacuum electronic device is the cathode, which is used to generate the electron beam required for the vacuum device to work. At present, the most widely used cathode is the metal hot cathode. However, the hot cathode has defects such as large volume, large heat radiation power consumption, long turn-on time, and material evaporation at high temperature, which limits the development of vacuum electronic devices in the direction of miniaturization and integration. . [0003] In recent years, field emission cold cathodes based on various one-dimensional / two-dimensional nanomaterials have received extensive attention and res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J1/304H01J9/02
CPCH01J1/304H01J1/3046H01J9/025
Inventor 洪序达梁栋郑海荣
Owner SHENZHEN INST OF ADVANCED TECH