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Composite ceramic coating powder, and preparation method and application method thereof

A technology of composite ceramics and manufacturing methods, applied in the direction of coating, metal material coating technology, etc., to achieve the effect of small particle size, less agglomeration, and stable crystal shape

Inactive Publication Date: 2012-10-24
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above problems, the technical problem to be solved by the present invention is to seek a composite ceramic coating powder with few restrictions on use, solve the technical problems of manufacturing this composite ceramic coating powder at the same time, and then provide a composite ceramic coating powder and its preparation method and Instructions

Method used

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Embodiment Construction

[0013] 1. The purity of 99.99% aluminum ammonium carbonate (NH 4 AlO(OH)HCO 3 ) Dehydrate at 500°C to produce γ-type alumina, and then calcinate at 1300°C for 8 hours to convert all γ-type alumina into α-type alumina with a purity of 99.99%. Then add 150ppm MgO, 300ppm ZrO to the obtained α-type alumina 2 And 40ppm Y 2 O 3 Stir uniformly after mixing, where ppm means parts per million by mass, and the purity of the last three items in the raw materials used is 99.9%. Then it is dried at 400°C, the mixture powder is pulverized by ball milling and air jet pulverization, and then calcined at 800°C for 4 hours. During air jet pulverization, the mixture has a rotating speed of 1500 r / min in the grinding chamber. The prepared composite ceramic coating powder contains α-Al 2 O 3 99.95% or more, MgO is 150ppm, ZrO 2 It is 300ppm, yttrium oxide is 40ppm, the rest are impurities, the particle size is 0.3~0.5μm, and the median particle size is 0.45μm. The aforementioned content is based o...

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PUM

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Abstract

The invention provides a composite ceramic coating powder, which comprises, calculated by dry basis, more than 99.7 wt% of alpha-Al2O3, 50-1000ppm of MgO, 100-1200 ppm of ZrO2, and 10-800 ppm of Y2O3; ppm represents mass parts per million; and median particle size of powder is 0.3-1 mum. The preparation method comprises steps of: first preparing alpha-Al2O3 from NH4AlO(OH)HCO3; mixing the prepared alpha-Al2O3 with MgO, ZrO2 and Y2O3 according to the product component requirements and crushing the mixture; then drying at 300-500 DEG C; and finally calcining at 800 DEG C for 4-5 h. An application method is as below: evenly stirring the powder and water in a ratio of 1:3 and spraying. Compared with a prior art, the invention provides a composite ceramic coating powder, so as to provide material basis for popularization and application of the composite ceramic.

Description

Technical field [0001] The invention relates to a composite ceramic coating powder, a preparation method and a use method thereof, and belongs to the technical field of chemical coatings. Background technique [0002] Composite ceramic coating powder refers to a mixture of metal oxides that can be used as a coating to form a composite ceramic coating on the surface of a workpiece. Composite ceramic coatings usually have properties such as insulation, heat insulation, and high temperature resistance. Therefore, composite ceramic coating powders are widely used. They are commonly used for surface coating of parts that need to work at high temperatures, especially for electrical appliances that work at high temperatures. The surface of the parts is coated to play a role in heat preservation and insulation. In addition to the traditional enamel technology, the layering technology of composite ceramic coatings includes dry spraying, ion coating, etc., but they have greater restrictio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/00
Inventor 李振华陈国庆
Owner ZHEJIANG OCEAN UNIV
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