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A preparation method for the surface coating of rigid ceramic heat-insulating tiles

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

Active Publication Date: 2016-11-23
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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  • A preparation method for the surface coating of rigid ceramic heat-insulating tiles
  • A preparation method for the surface coating of rigid ceramic heat-insulating tiles
  • A preparation method for the surface coating of rigid ceramic heat-insulating tiles

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specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, a method for preparing a surface coating of a rigid ceramic heat-insulating tile is specifically carried out in accordance with the following steps:

[0023] 1. Borosilicate glass powder and molten SiO 2 Mix the powder evenly to obtain the raw material powder 1, in parts by mass of borosilicate glass powder in the raw material powder 1, 40-60 parts, molten SiO 2 Powder is 40-60 parts;

[0024] Borosilicate glass powder, molten SiO 2 Powder, MoSi 2 Powder and SiB 4 Mix the powder evenly to obtain the raw material powder 2, the borosilicate glass powder in the raw material powder 2 is 30 to 40 parts by mass, and the molten SiO 2 Powder is 30-40 parts, MoSi 2 Powder is 10-20 parts, SiB 4 Powder is 10 to 20 parts;

[0025] Borosilicate glass powder, molten SiO 2 Powder, MoSi 2 Powder, SiB 4 Powder and ZrB 2 Mix the powder evenly to obtain the raw material powder 3, the borosilicate glass powder in the raw material powder 3 is 20 ...

specific Embodiment approach 2

[0032] Embodiment 2: This embodiment differs from Embodiment 1 in that in Step 1, 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 in the first embodiment.

specific Embodiment approach 3

[0033] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the average particle size of borosilicate glass powder in step 1 is 2-10 μm; the molten SiO 2 SiO in powder 2 The mass content is greater than 98%, and the average particle size is 2-10 μm; MoSi 2 The average particle size of the powder is 1-4μm; SiB 4 The average particle size of powder is 10~50μm; ZrB 2 The average particle diameter of the powder is 20-50 μm. Others are the same as in 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-insulating tile. Background technique [0002] Near-space hypersonic vehicles need to fly for thousands of seconds in an aerobic and high-temperature environment. Compared with high-speed vehicles that pass through the near-space region (only tens of seconds), their service time in an oxidative and high-temperature environment is particularly long (two Magnitude). Part of the damping work done by the atmosphere to the aircraft is finally expressed as aerodynamic heating to the surface of the aircraft, resulting in a sharp increase in the 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 flight speed of the...

Claims

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Application Information

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Patent Type & Authority Patents(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