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Growing method and application of semi-metallic titanium dioxide nanotube array film

A technology of nanotube array and titanium dioxide, which is applied in the field of field emission cathode materials, can solve the problems of not meeting the modulation requirements, low emission current density, and affecting normal work, etc., and achieves good field emission stability, excellent field emission performance, and is convenient for industrial production Effect

Inactive Publication Date: 2011-08-24
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, studies have shown that many of the above-mentioned materials have obvious disadvantages: or the work function is large, requiring a high driving voltage; or the chemical activity is high, resulting in the deterioration of the emitter; It is difficult to dissipate heat under current, which affects normal operation, etc., which limits the application of these materials in field emission display devices

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  • Growing method and application of semi-metallic titanium dioxide nanotube array film
  • Growing method and application of semi-metallic titanium dioxide nanotube array film
  • Growing method and application of semi-metallic titanium dioxide nanotube array film

Examples

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Effect test

Embodiment 1

[0037]Clean industrially pure titanium sheets (purity 99.9%) in acetone, absolute ethanol and deionized water in sequence; take concentrated hydrofluoric acid with a concentration of ≥40% and hydrofluoric acid with a concentration of 36% at a volume ratio of 1:4. Concentrated hydrochloric acid is mixed to form a polishing solution, and the cleaned pure titanium sheet is put into the polishing solution for chemical polishing for 180s; a constant voltage direct current anodic oxidation method is used to grow a titanium dioxide nanotube array film on the polished pure titanium sheet: graphite is used as the cathode , the pure titanium sheet is an anode, put it into an analytically pure ethylene glycol solution containing 0.2wt.% ammonium fluoride and 0.03wt.% hydrofluoric acid at room temperature to oxidize the pure titanium sheet, the gap between the cathode and the anode The distance was 3 cm, the oxidation voltage was 40 V, and the oxidation time was 60 min. During the oxidatio...

Embodiment 2

[0040] Clean industrially pure titanium sheets (purity 99.9%) in acetone, absolute ethanol and deionized water in sequence; according to the volume ratio of 1:6, take concentrated hydrofluoric acid with a concentration of ≥40% and a concentration of 38% respectively. Concentrated hydrochloric acid, mixed into a polishing solution; put the cleaned pure titanium sheet into the polishing solution and chemically polish it for 120s; use the constant voltage direct current anodic oxidation method to grow titanium dioxide nanotube array film on the polished titanium sheet: use graphite as the cathode , the titanium sheet is used as the anode, and the titanium sheet is oxidized in an analytically pure ethylene glycol solution containing 0.3wt.% ammonium fluoride and 0.05wt.% hydrofluoric acid at room temperature, and the distance between the cathode and the anode is 2cm , the oxidation voltage is 45V, and the oxidation time is 600min. During the oxidation process, stir with a magnetic ...

Embodiment 3

[0043] Clean industrially pure titanium sheets (purity 99.9%) in acetone, absolute ethanol and deionized water in sequence; take concentrated hydrofluoric acid with a concentration of ≥40% and a concentration of 36% respectively at a volume ratio of 1:8. Concentrated hydrochloric acid, mixed into a polishing solution; put the cleaned titanium sheet into the polishing solution for chemical polishing for 10s; use constant voltage direct current anodic oxidation method to grow titanium dioxide nanotube array film on the polished titanium sheet: use graphite as the cathode, The titanium sheet is an anode, and at room temperature, it is placed in an analytically pure ethylene glycol solution containing 0.25wt.% ammonium fluoride and 0.02wt.% hydrofluoric acid to oxidize the titanium sheet. The distance between the cathode and the anode is 5cm. The oxidation voltage is 60V, and the oxidation time is 120min. During the oxidation process, stir with a magnetic stirrer to ensure that the...

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Abstract

The invention discloses a growing method and application of a semi-metallic titanium dioxide nanotube array film. The growing method comprises the following steps of: firstly, cleaning a pure titanium sheet, and preparing a polishing solution; chemically polishing the cleaned pure titanium sheet in the polishing solution; putting graphite and the chemically polished pure titanium sheet into an electrolyte at room temperature for oxidizing the pure titanium sheet; putting the oxidized pure titanium sheet into a glycol solution for soaking, and then, putting the pure titanium sheet into a high-temperature resistant reactor; insulating at a certain vacuum degree and temperature under the condition of introducing mixed gas; and then, naturally cooling to the room temperature under the argon atmosphere to obtain the semi-metallic titanium dioxide nanotube array film. The array film is directly used as a field electron emission cold cathode. The growing method disclosed by the invention is convenient for industrialized production, can be used for preparing the semi-metallic titanium dioxide nanotube array film with excellent performance, cheap price and practical values, and has a better application value in the aspect of field electron emission display materials.

Description

technical field [0001] The invention belongs to the technical field of field emission cathode materials, and relates to a method for growing a semimetal titanium dioxide nanotube array film directly used for field emission; the invention also relates to an application of the semimetal titanium dioxide nanotube array film. Background technique [0002] A field emission display is a vacuum microelectronic device, which not only has the high image quality of a cathode ray tube, the thinness of a liquid crystal display, but also has the advantages of a large area of ​​a plasma display, making it have the potential to compete with other display devices . In recent years, field emission displays have attracted a lot of attention. However, in order for field emission displays to be widely used, field emission cathode materials with excellent performance are one of the most important technical supports. [0003] The research on field electron emission cold cathode materials focuse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C30B29/16C30B29/62C30B30/02
Inventor 王成伟王林青陈建彪
Owner NORTHWEST NORMAL UNIVERSITY
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