Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Patent
1996-09-30
1999-11-02
Marcantoni, Paul
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
501136, 501137, 423598, C04B 3546
Patent
active
059770040
ABSTRACT:
A particle of titanium compounds is in the form of a fine agglomerate comprising crystals of an alkaline-earth metal titanate represented by RTiO.sub.3 wherein R is an alkaline-earth metal and crystals of an alkali metal titanate represented by M.sub.2 Ti.sub.n O.sub.2n+1 wherein M is an alkali metal and n is an integer of 2 to 6, or these two kinds of crystals and crystals of titanium dioxide (TiO.sub.2), the two or three kinds of crystals being mingled together. A powder composed of such particles is produced by preparing a mixture from RO wherein R is an alkaline-earth metal or an alkaline-earth metal compound becoming RO when heated, M.sub.2 O wherein M is an alkali metal or an alkali metal compound becoming M.sub.2 O when heated, and TiO.sub.2 or a titanium compound becoming TiO.sub.2 when heated, in a ratio so that Z.gtoreq.X+mY wherein Z is the number of moles of TiO.sub.2, X is the number of moles of RO, Y is the number of moles of M.sub.2 O, Z, X and Y are each a positive number, and m is 6 when Z>X+mY or m is 2 to 6 when X=X+mY, and heat-treating the mixture at a temperature of 700 to 1300.degree. C. The powder is mixed with at least a binder resin, followed by molding to prepare a friction material.
REFERENCES:
patent: 4002592 (1977-01-01), Baskin
patent: 5383963 (1995-01-01), Kobayashi et al.
Chemical Abstracts, Abstract No. 83991a, vol. 97, No. 10, 1982, p. 792.
"Gmelins Handbuch der Anorganischen Chemie", Verlag Chemie, GMBH, Weinheim/Bergstrausse, System-Nummer 41, 1951, p. 432, Paragraph 1.
Database WPI, Section Ch, Week 8640, Derwent Publications Ltd., London, GB, Class E32, AN 86-262654, JP61-191-599A; August 26, 1986, (Abstract).
Database WPI, Section Ch, Week 8640, Derwent Publications Ltd., London, GB, Class E32, AN 86-262654, JP61-191-599A; Aug. 26, 1986, (Abstract).
Fujita Hironori
Higashi Kenji
Kubota Corporation
Marcantoni Paul
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