Compositions: ceramic – Ceramic compositions – Refractory
Patent
1994-02-15
1995-05-02
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Refractory
501122, 501 96, 264 65, C04B 3558
Patent
active
054119243
ABSTRACT:
The invention provides a ceramic body and a method of manufacturing such a body. The body is characterized by its composition, which comprises 20-30 at. % of magnesium, 20-30 at. % of silicon, 40-60 at. % of nitrogen and maximally 15 at. % of oxygen. A preferred composition corresponds to the formula MgSiN.sub.2-x O.sub.x, where x is smaller than 0.5. The manufacture of the ceramic body in accordance with the invention is simpler and cheaper than that of aluminium nitride, and a number of properties of said ceramic material are better than those of the known aluminium oxide.
REFERENCES:
"Structure De MgSiN2 Et MgGeN2" Jean David et al, Bull. Soc. Fr. Mineral Cristallogr. 93 153-159 (1970), No month.
"Preparation of a New Ternary Lithium Silicon Nitride, LiSi2n3, and the High Pressure Synthesis of Magnesium Silicon Nitride NgSiN2" E. D. Whitney et al, Inorganic Chemistry, vol. 10, No. 5, 1971 pp. 1090-1092, no month.
Whitney et al "Chem Abstracts", vol. 75, 1971, 104581e no month.
Uchida et al "J. Am. Ceram. Soc. " 68(2), C-38-C-40 (1985) no month.
De With Gijsbertus
Groen Wilhelm A.
Kraan Marcellinus J.
Bell Mark L.
Bonner C.
Spain Norman N.
U.S. Philips Corporation
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