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Method for preparing ceramic coating layer

A ceramic coating and ceramic technology, which is applied in chemical instruments and methods, catalyst activation/preparation, pressure inorganic powder coating, etc., can solve the problems of large thermal influence of structural changes on the substrate, and achieve the effect of superior structure and performance.

Inactive Publication Date: 2005-05-25
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the existing thermal spraying ceramic coating technology has the defects of undesired structural changes and large thermal influence on the substrate

Method used

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  • Method for preparing ceramic coating layer
  • Method for preparing ceramic coating layer
  • Method for preparing ceramic coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: see figure 1 , figure 1 It is a photo of the appearance of the titanium oxide block powder involved in the implementation of the present invention. The powder is a bulk titanium oxide powder produced by a smelting and crushing method, which has a polygonal shape and a rutile crystal structure.

Embodiment 2

[0028] Example 2: see figure 2 . figure 2 A photograph of the morphology of the titanium oxide agglomerated powder doped with iron oxide involved in the implementation of the present invention. The powder is composed of anatase TiO with a diameter of 0.2 μm 2 Micronized and added with 10% Fe 3 o 4 The particles are composite powders produced by spray granulation method, the powder is spherical, and the mechanically doped Fe in it is confirmed by DAX analysis 3 o 4 The particles are evenly distributed in the powder.

Embodiment 3

[0029] Embodiment 3: see image 3 . image 3 X-ray diffraction pattern of titanium oxide photocatalytic coating prepared by using titanium oxide bulk powder. Using the powder described in Example 1, according to the idea of ​​the present invention, a titanium oxide ceramic photocatalytic coating is prepared on a stainless steel substrate, and the crystal structure of the coating is rutile, which is consistent with the original powder, that is to say, the process will The crystal structure of the powder is almost completely transferred into the coating. The photocatalytic degradation of phenol in water and acetaldehyde in gas by using the coating shows that the coating has good photocatalytic performance.

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Abstract

The invention discloses a method for preparing a ceramic coating, which relates to the fields of chemical industry, environment and material processing. Ceramic powder is used as a raw material to prepare a ceramic coating, especially a titanium oxide photocatalytic coating, by means of a cold spraying method. If titanium oxide bulk powder or titanium oxide agglomerated powder is used as raw material, the titanium dioxide coating is deposited on the substrate by cold spraying. TiO prepared according to the present invention 2 The coating can be formed at a temperature of less than 600°C, and the structure and properties of the original powder can be better transplanted into the coating, especially in the preparation of nanostructured coatings and high-performance photocatalytic coatings. outstanding superiority. The method has the advantages of simple process, low production cost, good controllability and little influence on the matrix. The implementation of the present invention can prepare ceramic coatings with more superior structure and performance, especially can prepare high-performance nanostructure coatings, especially photocatalytic titanium oxide coatings.

Description

1. Technical field [0001] The invention relates to a preparation method of a coating in the fields of chemical industry, environment and material processing, in particular to a preparation method of a ceramic coating. 2. Background technology [0002] Spraying ceramic coating technology is a flexible, efficient, and low-cost ceramic coating preparation method, which is widely used in aerospace, electric power, machinery, petroleum, chemical and other fields. [0003] The existing spraying ceramic coating technology adopts thermal spraying methods, including plasma spraying, flame powder spraying or flame rod spraying, subsonic flame spraying, supersonic flame spraying, supersonic plasma spraying, and detonation spraying. In these spraying methods, the material undergoes a process of melting, depositing on the surface of the substrate, cooling and solidifying, and inevitable crystal structure transformation occurs. For some materials, these crystal structure transformations a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J37/02C23C24/04
Inventor 李长久杨冠军
Owner XI AN JIAOTONG UNIV
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