公开(公告)号：JP2001048638A

公开(公告)日：2001-02-20

申请号：JP21855999

申请日：1999-08-02

Applicant: AGENCY IND SCIENCE TECHN

Inventor： HOTTA YUJI ,  ODA KIICHI ,  SANO SABURO ,  TOMONO TAKUMI

IPC: C04B35/115 ,  C04B35/622

Abstract: PROBLEM TO BE SOLVED: To produce translucent alumina in slurry casting using a gypsum mold. SOLUTION: When a molding produced by the casting of an alumina slurry using a gypsum mold is sintered to produce an alumina sintered body, the molding is freed of impurities derived from the gypsum mold by acid treatment to enhance the translucency of the alumina sintered body. An alumina slurry is poured into a gypsum mold to form a molding, this molding is dried, calcined and immersed in an acid to remove contaminants from the molding contaminated with gypsum components in casting and drying, and then the molding is dried and sintered to obtain the objective translucent alumina.