Plastic and nonmetallic article shaping or treating: processes – Outside of mold sintering or vitrifying of shaped inorganic... – Producing metal oxide containing product
Patent
1998-11-05
2000-07-25
Derrington, James
Plastic and nonmetallic article shaping or treating: processes
Outside of mold sintering or vitrifying of shaped inorganic...
Producing metal oxide containing product
264646, 264648, 501102, 501103, 501104, 501105, 501117, 501118, 501121, 501123, 501126, 501127, 501128, 501132, 501154, C04B 3332, C04B 3565
Patent
active
060933666
ABSTRACT:
The present invention provides a ceramic sintered body excellent in oxidation resistance under high temperatures and markedly superior to the conventional ceramic sintered body in the mechanical strength over a wide temperature range of between room temperature and 1,500.degree. C. The ceramic sintered body of the present invention comprises at least one ceramic crystal grain selected from the group consisting essentially of a monosilicate represented by the general formula RE.sub.2 SiO.sub.5, where RE denotes a IIIa group element including yttrium, and a disilicate represented by the general formula RE.sub.2 Si.sub.2 O.sub.7, where RE denotes a IIIa group element including yttrium, and at least one additional element selected from the group consisting of Al, Cr, Hf, Nb, Zr, Ti, V, Ta, Ca and Mg which is segregated in the boundaries of the ceramic crystal grains in an amount of 0.1 to 15% by weight of the sintered body in terms of the oxide thereof.
REFERENCES:
patent: 2741822 (1956-04-01), Udy
patent: 5928979 (1999-07-01), Inuzuka et al.
Suxing Wu, et al. "Reaction Bonding and Mechanical Properties of Mullite/Silicon Carbide Composites", J. Am. Ceram. Soc., vol. 77 No. 11, Nov. 1994, pp. 2898-2904.
Fukasawa Takayuki
Goto Yasuhiro
Kato Masahiro
Mizutani Toshiaki
Derrington James
Kabushiki Kaisha Toshiba
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