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Carbon nanotube electron emitter and preparation method thereof

A technology of carbon nanotubes and electron emission, which is applied in the manufacture of electrode systems, manufacture of discharge tubes/lamps, circuits, etc., can solve the problems of not being able to use large areas and limited functions, and achieve good product performance, appropriate arrangement density, and ratio high effect

Inactive Publication Date: 2009-12-02
IRICO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above methods have limited effects and cannot fundamentally solve the problem of CNT orientation.
and cannot be used on a large scale

Method used

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  • Carbon nanotube electron emitter and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] see figure 1 , a carbon nanotube electron emitter preparation method, the method according to the following steps:

[0019] (1) Prepare carbon nanotube slurry: prepare carbon nanotube slurry with carbon nanotube powder, organic solvent, metal filler and low glass powder with catalyst metal particles attached to one end; the quality of carbon nanotube in the carbon nanotube slurry The fraction is 8%, the mass fraction of metal filler is 5%, the mass fraction of low glass powder is 5%, and the balance is organic solvent; the CNT powder is preliminarily dispersed in the alcohol solution for 4 minutes and then filtered with a 400-mesh sieve. Air-dry the filtrate at room temperature to obtain a preliminary dispersed CNT powder; add isopropanol to the preliminary dispersed carbon nanotubes for ball milling for 0.5h, then add organic solvents, metal fillers and low glass powder in proportion and stir to obtain a preliminary mixture; The preliminary mixture was stirred in a wa...

Embodiment 2

[0030] see figure 1 , a carbon nanotube electron emitter preparation method, the method according to the following steps:

[0031] (1) Prepare carbon nanotube slurry: prepare carbon nanotube slurry with carbon nanotube powder, organic solvent, metal filler and low glass powder with catalyst metal particles attached to one end; the quality of carbon nanotube in the carbon nanotube slurry The fraction is 20%, the mass fraction of metal filler is 12%, the mass fraction of low glass powder is 12%, and the balance is organic solvent; the CNT powder is preliminarily dispersed in the alcohol solution for 6 minutes and then filtered with a 400-mesh screen. Air-dry the filtrate at room temperature to obtain a preliminary dispersed CNT powder; add isopropanol to the preliminary dispersed carbon nanotubes for ball milling for 0.5h, then add organic solvents, metal fillers and low glass powder in proportion and stir to obtain a preliminary mixture; The preliminary mixture was stirred in ...

Embodiment 3

[0042] see figure 1 , a carbon nanotube electron emitter preparation method, the method according to the following steps:

[0043] (1) Prepare carbon nanotube slurry: prepare carbon nanotube slurry with carbon nanotube powder, organic solvent, metal filler and low glass powder with catalyst metal particles attached to one end; the quality of carbon nanotube in the carbon nanotube slurry The fraction is 15%, the mass fraction of metal filler is 8%, the mass fraction of low glass powder is 7%, and the balance is organic solvent; the CNT powder is preliminarily dispersed in the alcohol solution for 5 minutes and then filtered with a 400-mesh sieve. Air-dry the filtrate at room temperature to obtain a preliminary dispersed CNT powder; add isopropanol to the preliminary dispersed carbon nanotubes for ball milling for 0.5h, then add organic solvents, metal fillers and low glass powder in proportion and stir to obtain a preliminary mixture; The preliminary mixture was stirred in a w...

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Abstract

The invention discloses a carbon nanotube electron emitter and a preparation method thereof. The carbon nanotube electron emitter is prepared on a glass substrate by orienting technology. The preparation method is carried out according to the following steps: (1) preparing carbon nanotube paste; (2) printing the carbon nanotube paste; and (3) carrying out oriented treatment on the carbon nanotube to prepare the carbon nanotube electron emitter. The invention provides a method for preparing paste more applicable to carbon nanotube orientation and the unique orienting technology, fundamentally solves the problem that a screen painted carbon nanotube is hardly vertical to the substrate, and can be used in large scale. Compared with a carbon nanotube electron emitter prepared by the prior art, the carbon nanotube electron emitter prepared by the method for preparing the carbon nanotube electron emitter has the advantages of orderly arrangement of emitters, proper arrangement density, high ratio of the emitters vertical to the substrate and good product performance.

Description

Technical field: [0001] The invention relates to a method for manufacturing a field emission electron emitter, in particular to a method for manufacturing a carbon nanotube (CNT) electron emitter Background technique: [0002] Carbon nanotubes are one-dimensional nanomaterials discovered in the early 1990s. They have high tensile strength and high thermal stability, and can exhibit metal or semiconductor properties. They are widely used in fields such as force, heat, and optoelectronics. Especially because carbon nanotubes as a field emission electron source have the characteristics of high emission current density, high stability, and long service life, they are favored by researchers in the field of flat panel display devices. [0003] At present, CNTs are used as cathode emission materials for field emission display devices, which are basically divided into two categories: one is to directly grow CNTs on the substrate electrode by CVD method as an emitter, and the other i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/02C03C17/22
Inventor 李军
Owner IRICO
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