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Method for preparing field emission display cathode and ZnO nanowire cathode

A nanowire and display technology, applied in nanotechnology, nanotechnology, cold cathode manufacturing, etc., to achieve high efficiency, strong field emission capability, and good operability

Inactive Publication Date: 2006-12-27
XIAN TECHNOLOGICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Suitable for making large-size flat-panel displays

Method used

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  • Method for preparing field emission display cathode and ZnO nanowire cathode
  • Method for preparing field emission display cathode and ZnO nanowire cathode
  • Method for preparing field emission display cathode and ZnO nanowire cathode

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Adopt the novel method for preparing field emission display negative electrode of the present invention to prepare the field emission display negative electrode of ZnO nanowire:

[0051] Step 1: Put 2 grams of zinc powder with a purity of 99.995% on Al 2 o 3 on the ceramic boat, and then put the ceramic boat and zinc powder into the corundum tube together;

[0052] Step 2: Close the corundum tube and then evacuate it. When the vacuum in the corundum tube reaches 1Pa, flow Ar gas into the tube at a flow rate of 70 Sccm;

[0053] Step 3: When the pressure in the corundum tube reaches 0.5MPa, start heating the corundum tube, and raise the temperature to 800°C at a rate of 50°C / min;

[0054] The fourth step: turn off the Ar gas, pass air into the corundum tube, turn off the power supply and vacuum pump after 1 hour of heat preservation, and prepare large-scale ZnO nanowires without any catalyst; see Figure 13 .

[0055] The fifth step: according to the mass ratio, ZnO ...

Embodiment 2

[0061] The first step: put 3 grams of a certain amount of zinc powder (purity: 99.995%) on Al 2 o 3 on the ceramic boat, and then put the ceramic boat and zinc powder into the corundum tube together;

[0062] Step 2: Close the corundum tube and then evacuate it. When the vacuum in the corundum tube reaches 1Pa, flow Ar gas into the tube at a flow rate of 70 Sccm;

[0063] Step 3: When the pressure in the corundum tube reaches 0.5MPa, start heating the corundum tube, and raise the temperature to 800°C at a rate of 50°C / min;

[0064] Step 4: Turn off the Ar gas, pass air into the corundum tube, turn off the power supply and vacuum pump after 1 hour of heat preservation, and prepare ZnO nanowires with a large aspect ratio;

[0065] The fifth step: according to the mass ratio, the ratio of ZnO nanowires: carboxymethyl cellulose is 4:5, weigh the prepared ZnO nanowires, disperse them in hot water with ultrasonic waves for 15 minutes, and after the dispersion is uniform, then weig...

Embodiment 3

[0071] The first step: put 3 grams of zinc powder (99.995%) on Al 2 o 3 on the ceramic boat, and then put the ceramic boat and zinc powder into the corundum tube together;

[0072] Step 2: Close the corundum tube and then evacuate it. When the vacuum in the corundum tube reaches 1Pa, flow Ar gas into the tube at a flow rate of 70 Sccm;

[0073] Step 3: When the pressure in the corundum tube reaches 0.5MPa, start heating the corundum tube, and raise the temperature to 800°C at a rate of 50°C / min;

[0074] Step 4: Turn off the Ar gas, pass air into the corundum tube, turn off the power supply and vacuum pump after 1 hour of heat preservation, and prepare ZnO nanowires with a large aspect ratio;

[0075] The fifth step: according to the mass ratio, the ratio of ZnO nanowires: carboxymethyl cellulose is 3:5, weigh the prepared ZnO nanowires, disperse them in hot water with ultrasonic waves for 15 minutes, and after the dispersion is uniform, then weigh the prepared ZnO nanowires...

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Abstract

The provided key technique for large-scale ZnO nano line preparation comprises: aerating gas while heating as 50Deg / min to prepare much radial-pattern needle-shape ZnO nano line without catalyst; selecting the nano line and CMC as pulping agent by mass ratio as 1:5~4:5 to prepare the slurry, and controlling the decomposition temperature of the agent and ZnO nano line in 500-800 Deg. This invention is low cost, efficient and environmental friendly, and has wide application.

Description

technical field [0001] The invention relates to the field of optoelectronic materials, and mainly relates to a preparation method of a cathode of a field emission display, that is, a new process for preparing a cathode of a field emission display (FED) with a new material and a cathode of a field emission display prepared by ZnO nanowires, specifically a method for preparing a field emission display (FED) cathode. New approach to emissive display cathodes and ZnO nanowire cathodes. Background technique [0002] Due to the excellent structural properties of carbon nanotubes (CNTs), they are very suitable as cold cathode materials for field emission flat panel displays (FEDs). Remarkable results have been achieved, such as Sun Yat-sen University, Southeast University, Xi'an Jiaotong University, etc. At present, under the trend of accelerating the development of flat-panel displays to large sizes, cost advantage is undoubtedly an important decisive factor for occupying the mar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/02H01J1/304B82B3/00C01G9/02
Inventor 范新会于灵敏张克良严文
Owner XIAN TECHNOLOGICAL UNIV
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