Homogenized alumina ceramic and preparation method thereof

A technology of alumina ceramics and alumina ceramic powder, which is applied in the field of homogenized alumina ceramics and its preparation, can solve the problems of inability to obtain homogenized alumina ceramics, etc., and achieves low cost, improved uniformity, and heat export. easy effect
CN110698186BActive Publication Date: 2022-08-09AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
Publication Date
2022-08-09

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Abstract

The invention provides a homogenized alumina ceramic and a preparation method thereof, which can solve the technical problem that the existing preparation method cannot obtain the homogenized alumina ceramic. Wherein, the preparation method of homogenized alumina ceramics includes: preparing mixed slurry: sequentially mixing silica sol, water-soluble macromolecular organic matter and alumina ceramic powder in a certain mass ratio to obtain a mixed slurry; preparing homogeneous oxidation Aluminum ceramics, comprising: injecting the mixed slurry into a mold and controlling the mold to rapidly suspend in a liquid nitrogen environment to solidify the mixed slurry to obtain a green body; demolding the green body and performing The homogeneous alumina ceramic is obtained after treatment.
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Description

technical field

[0001] The invention belongs to the technical field of functional ceramic preparation, in particular to a homogenized alumina ceramic and a preparation method thereof. Background technique

[0002] Alumina ceramics have the advantages of high mechanical strength, high resistivity, good electrical insulation, high melting point, good corrosion resistance, and excellent chemical stability. They are widely used in machinery, electronic power, chemical industry, medicine, construction and other high-tech fields. .

[0003] At present, the preparation methods of alumina ceramics include: isostatic pressing, dry pressing, extrusion, tape casting, grouting, gel injection molding, freeze forming, freeze gel forming, and the like. Among them, the commonly used methods are extrusion molding, grouting molding and freezing molding. The amount of solvent and binder in the extrusion molding slurry is relatively high, which makes the green body shrink greatly during drying...

Claims

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