Rigid ceramic thermal-insulation tile surface coating preparation method

A technology of surface coating and heat insulation tiles, which is applied in the field of preparation of surface coatings of ceramic heat insulation tiles, can solve the problems of oxidation resistance and low thermal radiation coefficient, rigid porous ceramic heat insulation tiles are easy to absorb water, etc.

Active Publication Date: 2015-08-26
芜湖市德明新材料科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention aims to solve the technical problems of rigid porous ceramic heat-insulating tiles that are easy to absorb water, have low oxidation resistance and low thermal radiation coefficient, and provide a method for preparing the surface coating of rigid ceramic heat-insulating tiles

Method used

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  • Rigid ceramic thermal-insulation tile surface coating preparation method
  • Rigid ceramic thermal-insulation tile surface coating preparation method
  • Rigid ceramic thermal-insulation tile surface coating preparation method

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specific Embodiment approach 1

[0022] Specific embodiment 1: This embodiment is a method for preparing a surface coating of a rigid ceramic insulation tile, which is specifically carried out according to the following steps:

[0023] 1. Combine borosilicate glass powder and molten SiO 2 Powders are uniformly mixed to obtain raw material powder 1, according to the mass parts of raw material powder 1, 40-60 parts of borosilicate glass powder and molten SiO 2 The powder is 40-60 parts;

[0024] Combine borosilicate glass powder and molten SiO 2 Powder, MoSi 2 Powder and SiB 4 The powders are mixed uniformly to obtain raw material powder 2. According to the mass parts of raw material powder 2, the borosilicate glass powder is 30-40 parts, and the molten SiO 2 Powder is 30-40 parts, MoSi 2 Powder is 10-20 parts, SiB 4 The powder is 10-20 parts;

[0025] Combine borosilicate glass powder and molten SiO 2 Powder, MoSi 2 Powder, SiB 4 Powder and ZrB 2 Powders are uniformly mixed to obtain raw material powder 3, according t...

specific Embodiment approach 2

[0032] Specific embodiment two: This embodiment is different from specific embodiment one in that in step one, the borosilicate glass powder is synthesized by melting silicon oxide and boron oxide at a high temperature of 1100°C, wherein the weight content of boron oxide is 10-20%. Others are the same as the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: this embodiment is different from specific embodiment one in that the average particle size of the borosilicate glass powder in step one is 2-10 μm; molten SiO 2 SiO in powder 2 The mass content is greater than 98%, and the average particle size is 2-10μm; MoSi 2 The average particle size of the powder is 1~4μm; SiB 4 The average particle size of the powder is 10~50μm; ZrB 2 The average particle size of the powder is 20-50μm. Others are the same as the first embodiment.

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Abstract

The invention relates to a rigid ceramic thermal-insulation tile surface coating preparation method, and relates to a ceramic thermal-insulation tile surface coating preparation method. The invention aims at solving technical problems of high water absorption, low oxidation resistance and low thermal radiation coefficient of rigid porous ceramic thermal-insulation tiles. The method comprises the steps of 1, raw material powder preparation; 2, mixed material preparation; 3, spray coating; and 4, sintering. With the method provided by the invention, the microstructure of the coating has a gradual gradient feature. The coating at a porous substrate side is porous, and the surface coating is smooth and compact. With the existence of the porous transition layer, a coating and substrate expansion mismatch characteristic can be coordinated. The method provided by the invention is used for preparing the rigid ceramic thermal-insulation tile surface coating.

Description

Technical field [0001] The invention relates to a method for preparing a surface coating of a ceramic heat insulation tile. Background technique [0002] Near-space hypersonic vehicles need to fly for thousands of seconds in aerobic and high-temperature environments. Compared with high-speed vehicles that travel through near-space regions (only tens of seconds), their service time in oxidizing and high-temperature environments is particularly long (two large ones). Magnitude). Part of the damping work of the atmosphere on the aircraft is ultimately manifested as aerodynamic heating transmitted to the surface of the aircraft, resulting in a sharp increase in surface temperature. Long-term aerodynamic heating makes the surface temperature of the head and flange parts exceed 2000°C. At the same time, in order to maintain a high lift-to-drag ratio and a good aerodynamic shape, the outer surface of these parts is not allowed to produce obvious ablation. In addition, as the flying sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/52C04B41/89
Inventor 钟业盛史丽萍李明伟赫晓东马晓亮王祥宇高岩
Owner 芜湖市德明新材料科技发展有限公司
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