Title:
PRODUCTION OF BETA-ALUMINA POWDER
Document Type and Number:
Japanese Patent JPH03174317
Kind Code:
A
Abstract:
PURPOSE: To improve disintegrability by spray-drying and granulating a slurry using water as a solvent and regulating the water content of the resulting granulated powder to a specified value.
CONSTITUTION: α-Al2O3 as an Al2O3 source, Na2CO3 as an Na2O source, MgO and Li2O as MgO and Li2O sources as additives are weighed by prescribed amts., mixed, pulverized, dried, calcined and pulverized. Water is added to the resulting powder to prepare a slurry and this slurry is spray-dried at 80-120°C with a spray drier and granulated to obtain granulated β-Al2O3 powder having 2.0-4.0wt.% water content. This granulated powder is molded by isostatic pressing and fired to give a β-Al2O3 sintered body.
Inventors:
UKAI NORIYUKI
Application Number:
JP31286289A
Publication Date:
July 29, 1991
Filing Date:
December 01, 1989
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
C01F7/028; C04B35/113; (IPC1-7): C01F7/02
Attorney, Agent or Firm:
Ippei Watanabe (1 person outside)