PRODUCTION OF FINE PLATE PARTICLE OF ALUMINA

Title:

PRODUCTION OF FINE PLATE PARTICLE OF ALUMINA

Document Type and Number:

Japanese Patent JPH0517132

Kind Code:

A

Abstract:

PURPOSE: To efficiently obtain fine plate particles of alumina having uniform particle diameter of submicron order by adjusting the particle diameter of aluminum hydroxide, etc., and subjecting the aluminum hydroxide to hydrothermal treatment under specific condition in water or an aqueous solution of an alkali.

CONSTITUTION: The starting raw material consisting of aluminum hydroxide or hydrated alumina is crushed and adjusted to the particle size of submicron order. The starting raw material having adjusted particle size is filled in an autoclave together with water or an aqueous solution of an alkali (sodium hydroxide or sodium carbonate) and subjected to hydrothermal treatment at ≥350°C under a pressure of ≤200atm. The fine plate particles of alumina produced by this process can be used as a pigment for paint or in the field of the forming of ceramics.

Inventors:

SHIBAZAKI YASUO
ODA KIICHI
FUKUDA YUSHI

Application Number:

JP19366891A

Publication Date:

January 26, 1993

Filing Date:

July 09, 1991

Export Citation:

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Assignee:

AGENCY IND SCIENCE TECHN
YOSHIDA KOGYO KK

International Classes:

C01F7/44; C09C1/40; C09D7/12; (IPC1-7): C01F7/44

Attorney, Agent or Firm:

Director, Nagoya Institute of Industrial Technology, Institute of Industrial Technology
Hidetake Komatsu (2 outside)

Next Patent: SOLUTION OF CALCIUM CARBONATED COLLOID AND ITS PRODUCTION AND USE