Composite ceramic coating powder and its preparation method and application method

A technology of composite ceramics and coatings, applied in coating, metal material coating process and other directions, to achieve the effect of less agglomeration, stable crystal shape and small particle size

Inactive Publication Date: 2016-05-11
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. Ammonium aluminum carbonate (NH 4 AlO(OH)HCO 3 ) dehydrated at 500°C to generate γ-alumina, and then calcined at 1300°C for 8 hours to convert all γ-alumina into α-alumina with a purity of 99.99%. Add 150ppmMgO and 300ppmZrO to the obtained α-alumina 2 and 40ppmY 2 o 3 Stir evenly after mixing, where ppm means parts per million by mass, and the purity of the latter three items in the raw materials used is 99.9%. Then it is dried at 400°C, and the mixture powder is calcined at 800°C for 4 hours after ball milling and jet milling. During jet milling, the mixture has a rotational speed of 1500r / min in the grinding chamber. The prepared composite ceramic coating powder contains α-Al 2 o 3 99.95% or more, MgO 150ppm, ZrO 2 It is 300ppm, yttrium oxide is 40ppm, and the rest are impurities. The particle size is 0.3~0.5μm, and the median particle size is 0.45μm. The aforementioned content is the ratio of the mass of the component to the total mass on a dry basis. Th...

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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 paint powder, a preparation method and a use method thereof, and belongs to the technical field of paint in chemistry. 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 used in a wide range of applications. They are often used for surface coating of parts that need to work at high temperatures, especially for electrical appliances that work at high temperatures. The surface coating of parts plays the role of heat insulation and insulation. The layering technology of composite ceramic coatings, in addition to the traditional enamel technology, also has dry spraying, ion coating, etc., but they have...

Claims

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Application Information

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