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Self-cleaning glass and preparation method thereof

A self-cleaning and glass technology, applied in the field of self-cleaning glass and its preparation, can solve the problems of poor bonding force of glass substrates, small specific surface area, affecting the durability of the film layer, etc., and achieve high light transmittance and high light transmittance. Effect

Active Publication Date: 2014-12-24
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, although the light transmittance of the self-cleaning glass prepared by the above method can reach 65% to 90%, the thickness of the coating is mostly between 5 and 200nm, and the optimal value is 10 to 40nm. As we all know, too low a thickness Not only does it affect the durability of the film, but more importantly, it reduces the photocatalytic performance of the film. Secondly, these films are all made of TiO 2 Exist in granular form with small specific surface area
To increase the specific surface area, it is necessary to form loose nano-TiO 2 Coating structure, resulting in poor adhesion to glass substrates
Furthermore, improving the photocatalytic performance of the glass by increasing the thickness will reduce the light transmittance of the glass. Therefore, in the self-cleaning glass prepared by the prior art, the photocatalytic ability and light transmission are a pair of contradictions. It is difficult to improve the photocatalytic performance

Method used

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  • Self-cleaning glass and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1～12

[0053] Step (1): Using glass (float glass, with a light transmittance of 90%) as the substrate, a titanium film was prepared on the glass substrate by the medium-frequency pulse magnetron sputtering method, and the titanium target was installed on the medium-frequency pulse cathode with a frequency of 75KHz~125KHz, the duty cycle is 2.5μs~4μs, and the intermediate frequency bias voltage of -10V~-40V is applied. The glass substrate is installed on the workbench, and the temperature of the workbench is 200°C-400°C, that is, the deposition temperature is 200°C-400°C. Introduce argon gas, adjust the chamber pressure (that is, the deposition pressure) to 0.1Pa~0.5Pa, sputter the titanium target, and the power density of the titanium target is 4.0w / cm 2 ~5.5w / cm 2 , the thickness of the deposited titanium film is 1.5 μm;

[0054] Step (2): Perform anodic oxidation on the glass substrate after depositing the titanium film in step (1), use the glass substrate after depositing the ti...

Embodiment 7

[0057] Example 7 The X-ray diffraction (XRD) spectrum of a titanium film deposited by magnetron sputtering on a glass substrate is as follows: figure 2 As shown, it can be seen that the titanium film grows along the (002) crystal plane, look up the PDF card (Ti44-1294JCPDS) for phase analysis, and it is a close-packed hexagonal structure. Example 7 A cross-sectional scanning electron microscope (SEM) photo of a titanium film deposited by magnetron sputtering on a glass substrate is shown in image 3 As shown, it can be seen that the cross-sectional structure of the titanium film is dense. Depend on figure 2 and image 3 It can be seen that the titanium film grows along the (002) crystal plane, and the film structure is dense. Table 3 shows the structures and physical properties of the titanium films deposited by magnetron sputtering on glass substrates in Examples 1-12. It can be seen from Table 3 that the crystal structure of the prepared titanium film mainly grows alon...

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Abstract

The invention discloses a self-cleaning glass, including a glass substrate and a titanium dioxide layer arranged on the glass substrate. The titanium dioxide layer comprises titanium dioxide nanotubes vertical to the glass substrate, wherein the titanium dioxide nanotubes have length of 500-3500 nm, wall thickness of 10-35 nm, and aperture of 10-80nm, the distance between the centers of the two adjacent titanium dioxide nanotubes is 60-130nm, and the titanium dioxide nanotubes have sn anatase crystal structure. The self-cleaning glass provided by the invention has excellent light transmittance, photocatalytic performance and self-cleaning performance, can be widely used in industries with light transmission requirements to play the roles of light transmission, dust resistance and fog resistance, and has good application prospects. The invention also discloses a preparation method of the self-cleaning glass, and the method combines the magnetron sputtering method, anodic oxidation and annealing process. The method of the invention is easy to implement, strong in operability, and easy for mass production.

Description

technical field [0001] The invention relates to the field of self-cleaning glass and its preparation, in particular to a self-cleaning glass with high light transmittance and high photocatalysis used in windows and mirrors of buildings, lamps, automobiles and the like and a preparation method thereof. Background technique [0002] As a photocatalyst, titanium dioxide film can play a catalytic role. First of all, it can decompose organic matter. When titanium dioxide is irradiated by ultraviolet rays, electrons on titanium atoms are excited by light to form electron holes, while water and oxygen in the air will be decomposed into O 2- and OH - , has a strong oxidizing ability, decomposes organic matter into carbon dioxide and water, and can also degrade some inorganic compounds. In addition, the titanium dioxide film has super-hydrophilicity. After the titanium dioxide film is excited by ultraviolet light, the titanium in its structure reacts with the moisture in the air to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/27
Inventor 黄峰李朋李艳玲郭军
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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