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Carbonitride field emission cathode preparation method

A field emission cathode and titanium sheet technology, which is applied in cold cathode manufacturing, electrode system manufacturing, discharge tube/lamp manufacturing, etc., can solve the problems of limited growth area and complex growth process of carbon nitride nanotube film, and achieve key Good combination, excellent field emission characteristics, and good uniformity

Inactive Publication Date: 2013-07-31
NORTHWEST UNIV
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Problems solved by technology

Although the characteristics of field emission cathodes are excellent, the growth process of carbon nitride nanotube films is relatively complicated, and the growth area is limited, which is not conducive to the development of field emission cathodes in the direction of low-cost and large-area practical applications.

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  • Carbonitride field emission cathode preparation method

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Embodiment Construction

[0027] According to the technical solution of the present invention, the present embodiment provides a method for preparing a CNx field emission cathode, which specifically includes the following steps:

[0028] 1) Select a titanium sheet as the substrate, grind and polish one surface of the titanium sheet, place it in acetone for ultrasonic cleaning, then rinse with deionized water and dehydrate with ethanol;

[0029] 2) Select the graphite-like phase CNx particles prepared by the sol-gel method known in the art as the field emitter material, and grind the graphite-like phase CNx particles to the order of several microns;

[0030] 3) Preparation of CNx suspension: the solute is selected from graphite-like phase CNx particles after grinding; the solvent is selected from acetone; the adhesive is polyvinyl acetate, which is dissolved in acetone to prepare a 10% colloid solution; the solute, The solvent and the colloidal solution are mixed and stirred evenly to make a CNx suspens...

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Abstract

The invention discloses a carbonitride field emission cathode preparation method. A titanium sheet is selected as a substrate, by utilizing a suspending liquid standing settling method, a glue film containing CNx is formed on the substrate, and a Tic transition layer is bonded and generated between the substrate and CNx particles with an HFCVD heat treatment. The preparation method comprises the following steps: carrying out polishing processing on the substrate titanium sheet, by utilizing the suspending liquid standing settling method, forming the organic glue film containing CNx on the substrate, employing a vacuum heat treatment to decompose and volatilize the organic glue film, and forming bonding of the CNx particles and the substrate simultaneously. According to a CNx flat field emission cathode prepared in the invention, since the Tic transition layer is bonded and generated between the substrate and the CNx particles, electronic barrier at an interface is reduced, high density electron injection is realized, and adhesion of the CNx particles with the substrate is reinforced simultaneously. The carbonitride field emission cathode preparation method has the characteristics of simple process, low cost and easy popularization.

Description

technical field [0001] The invention belongs to the manufacture of field emission display cathodes in the technical field of electronic display, and in particular relates to a preparation method of carbon nitride field emission cathodes. Background technique [0002] Carbon nitride is a covalent compound similar to silicon nitride proposed by theoretical prediction, which has great polymerization energy and mechanical stability. Theoretical calculations show that carbon nitride is a typical wide-bandgap semiconductor material, which may have a small or negative electron affinity. Carbon nitride also has outstanding physical properties such as oxidation resistance, wear resistance, and corrosion resistance. High chemical stability, is an excellent field emission cathode material. [0003] In recent years, the fabrication of carbon nitride thin film cathodes has been extensively studied. Chinese patent (publication number: CN1401560) discloses a preparation method of arrayed...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D3/02H01J9/02
Inventor 翟春雪张志勇杨延宁赵武王雪文闫军锋
Owner NORTHWEST UNIV
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