Ceramic materials containing keatite

Details Ceramic materials containing keatite Ceramic materials containing keatite

1975-08-13

1977-03-08

Garvin, Patrick P.

Compositions: coating or plastic

Coating or plastic compositions

Marking

65 31, C03C 322, C03C 1500

Patent

active

040110915

ABSTRACT:
Disclosed are low expansion, chemically resistant, ceramic articles containing keatite as the principal crystalline phase. The articles are prepared from compositions in the Li.sub.2 O.Al.sub.2 O.sub.3.SiO.sub.2 field. In preparing this ceramic article, a glass having the desired composition is formed into the appropriate shape by molding the molten glass, compaction and sintering of glass particles or by other conventional glass and ceramic forming processes. The article thus formed is then crystallized to keatite solid solution by an appropriate heat treatment followed by acid leaching in a strong but diluted aqueous acid to produce a ceramic material having the hydroxy aluminosilicate crystalline structure. The hydroxy aluminosilicate ceramic article is then thermally dehydrated to produce a ceramic article containing keatite as a crystalline phase together with mullite with or without the presence of other phases such as amorphous or glassy SiO.sub.2, quartz and nucleants.

REFERENCES:
patent: 3834981 (1974-09-01), Grossman et al.
patent: 3841950 (1974-10-01), Planchock et al.
Keat, P., "A New Crystalline Silica", Science vol. 120, pp. 328-330 (1954).

Affiliated with

Also associated with

Rating

Ceramic materials containing keatite does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ceramic materials containing keatite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ceramic materials containing keatite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1404413