FIELD: chemistry. SUBSTANCE: this process includes such steps as subjecting aluminum hydroxide added with powdery aluminum alpha-oxide having particle size of mcm, maximum, and taken in amount of 10 to 30 percent by mass to plasticization with use of nitric acid to acid modulus of 0.07 to 0.12, molding plasticized stock into rings by extrusion molding method, drying and then calcining stock. EFFECT: more sophisticated technique. 1 tbl
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Authors
Dates
1995-05-27—Published
1992-10-01—Filed