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Linear nano carbon tube composite-field emission source and method for preparing same and dedicated device therefor

A technology of carbon nanotubes and composite fields, which is applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., and can solve the problems of equipment investment cost and power consumption increase

Inactive Publication Date: 2006-12-13
北京北大新世纪科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using tube furnace CVD to prepare linear CNTs field emission sources with a larger length (eg > 10 cm) requires the use of tube furnaces with very long furnace tubes, which increases equipment investment costs and power consumption

Method used

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  • Linear nano carbon tube composite-field emission source and method for preparing same and dedicated device therefor
  • Linear nano carbon tube composite-field emission source and method for preparing same and dedicated device therefor

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0063] This embodiment is based on figure 1 The description of the dedicated device for preparing linear CNTs composite field emission source is shown. The device can be used to prepare linear CNTs composite field emission source and test the field emission characteristics and luminescence characteristics of linear CNTs composite field emission source. In order to clearly show the structure of the linear CNTs field emission source, in figure 1 In the middle, the catalyst film 17 and the carbon nanotube film 18 on the fiber braided rope 16 are respectively peeled downward or upward into a small section. figure 1 The device shown is composed of a reaction chamber, a self-powered circuit and a field emission test circuit.

[0064] The reaction chamber is composed of a cylindrical cavity 1, first and second upper covers 2 and 3, first and second lower covers 4 and 5, and a gas path system. The cylindrical cavity 1 is a domestic T-shaped fluorescent lamp glass tube, with a length of...

Embodiment 2

[0075] In the device of this embodiment, the cylindrical cavity 1 uses a domestic T-shaped fluorescent lamp glass tube, which has a diameter of 3 cm, a wall thickness of 1.2 mm, and a length of 30 cm. A 200m thick transparent conductive ITO film was coated on the inner wall of the glass tube by sol-gel extraction method, and a Nichia NP1045 white phosphor layer was deposited on the transparent conductive ITO film by electrophoresis, with a thickness of 20μm. The other parts of the device are the same as in Example 1.

[0076] The steps of making linear CNTs composite field emission source are as follows:

[0077] (1) Selection and treatment of fiber braided rope: select a Fe-Al-Cr alloy fiber braided rope (fiber diameter of 1μm) with a length of 30cm and a diameter of 0.5mm as the substrate material, and the Fe-Al- The Cr alloy fiber braided rope is sequentially placed in acetone and ethanol for ultrasonic cleaning, and then oxidized in the air at 1000°C for 12 hours to form a den...

Embodiment 3

[0085] In the device of this embodiment, the cylindrical cavity 1 uses a domestic T-shaped fluorescent lamp glass tube, which has a diameter of 4 cm, a wall thickness of 1.4 mm, and a length of 50 cm. A sol-gel extraction method is used to coat a 250nm thick transparent conductive ITO film on the inner wall of the glass tube. Electrophoresis is used to deposit a 30μm-thick phosphor layer on the transparent conductive ITO film. The phosphor is a German Osram-P22 type green phosphor. The other parts of the device are the same as in Example 1.

[0086] The following describes the steps of making a linear CNTs composite field emission source using this embodiment:

[0087](1) Selection of fiber braided rope and its treatment: choose Fe-Al-Cr alloy fiber braided rope with a length of 50cm and a diameter of 1.0mm (fiber diameter of 2μm) as the substrate material, and follow the method described in Example 2. Fe-Al-Cr alloy fiber braided rope is cleaned and oxidized.

[0088] (2) Catalys...

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Abstract

The invention discloses a linear nanometer carbon pipe composite field launching source and making method and specific device, which contains a conductive fiber weaving line substrate with single wall or multiple-wall nanometer carbon pipe film deposited on the substrate. The making method comprises the following steps: predisposing the surface of fiber weaving line; utilizing self-power pyrolytic CVD method grow single-wall or multiple-wall nanometer carbon pipe on the fiber weaving fiber. The length of composite field launching source is not limited, which produces linear pattern product. The device is fit for pipe-typed nanometer carbon pipe field launching luminous bulb, which can observe the field emitting condition.

Description

Technical field [0001] The invention relates to a carbon nanotubes (Carbon Nanotubes, hereinafter referred to as CNTs) composite field emission source, a preparation method and a growth device thereof, and in particular to a linear CNTs composite field emission source, a preparation method and a special device. Background technique [0002] CNTs can be regarded as quasi-one-dimensional nanomaterials formed by curling graphite sheets: CNTs formed by curling single-layer graphite sheets are called single-walled carbon nanotubes (SWNTs), which are composed of multiple layers of graphite. CNTs formed by coaxially crimping sheets are called Multi-Walled Carbon Nanotubes (hereinafter referred to as MWNTs). [0003] Because CNTs have excellent electrical conductivity (for metallic CNTs), extremely high mechanical strength and chemical stability, and very high form factor (ratio of length to radius), it becomes an ideal electron field emission material. Aroused widespread concern. [000...

Claims

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Application Information

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IPC IPC(8): H01J1/304H01J9/02C01B31/00B82B1/00B82B3/00
Inventor 冯孙齐
Owner 北京北大新世纪科技发展有限公司
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