Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1994-09-07
2000-06-27
Bos, Steven
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C01F 702
Patent
active
060803800
ABSTRACT:
The present invention provides a process for producing fine flaky alumina particles which are suitable as a raw material for ceramics, a pigment for paint, etc., wherein aluminum hydroxide or alumina hydrate having a particle size regulated to the order of submicron is subjected to a hydrothermal treatment in water or an aqueous alkali solution at a temperature of 350.degree. C. or above and under a pressure of 200 kg/cm.sup.2 or below. The present invention further provides an alumina-based plastic material which is produced by kneading the aforesaid fine flaky particles with an organic water holding material and water. Methylcellulose, polyvinyl alcohol, carboxymethylcellulose, polyethylene glycol, etc. are preferably used as the organic water holding agent. The alumina-based plastic material has a high plasticity, so that there is no need of using a large amount of a binder. Thus a dense molded article having stable properties can be prepared.
REFERENCES:
patent: 2642337 (1953-06-01), Newsome
patent: 4193768 (1980-03-01), Ohishi et al.
patent: 4882133 (1989-11-01), Saegusa
patent: 5019367 (1991-05-01), Oguri et al.
Fukuda Takeshi
Oda Kiichi
Shibasaki Yasuo
Agency of Industrial Science and Technology, Ministry of Interna
Bos Steven
YKK Corporation
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