Chemistry of inorganic compounds – Nitrogen or compound thereof – Oxygen containing
Reexamination Certificate
2005-10-18
2005-10-18
Langel, Wayne A. (Department: 1754)
Chemistry of inorganic compounds
Nitrogen or compound thereof
Oxygen containing
Reexamination Certificate
active
06955798
ABSTRACT:
A method of preparing substantially homogeneous aluminum oxynitride powder and other nitrogen-containing powders is provided. Particularly with respect to the AlON powder, the method comprises the steps of milling a mixture of aluminum and aluminum oxide in a nitrogen-containing atmosphere until a milled powder composed of aluminum-nitrogen solid solution and aluminum oxide forms. The next step is heating the milled powder in the presence of an inert gas and keeping it at sufficient temperature for a sufficient heating time to form the substantially homogenous aluminum oxynitride powder. This method is extended to the preparation of other powders by employing appropriate starting materials. The resultant powders are also claimed as part of the instant invention.
REFERENCES:
patent: 4241000 (1980-12-01), McCauley
patent: 4481300 (1984-11-01), Hartnett
patent: 4686070 (1987-08-01), Maguire
patent: 4720362 (1988-01-01), Gentilman
patent: 4806330 (1989-02-01), Melling et al.
patent: 4866012 (1989-09-01), Silverman
patent: 5075265 (1991-12-01), Narula
patent: 5466310 (1995-11-01), Ninham
patent: 0590378 (1994-04-01), None
patent: 58-135112 (1983-08-01), None
patent: 60-200827 (1985-10-01), None
patent: 1-192726 (1989-08-01), None
Calko, “Low temperature synthesis of AL-ALN composites from a nanostructure made by controlled magneto-ball milling of AL in ammonia”, Journal of Applied Physics, 75 (10), May 15, 1994, pp 4953-4954, 1994 American Institute of Physics.
Yang, “Synthesis of titanium oxynitride by mechanical milling”, Journal of Materials Science 28 (1993), pp 5663-5667, 1993 Chapman & Hall.
Martin, “Synthesis and hot pressing of transparent aluminum oxynitride”, SPIE vol. 1112 Window and Dome Technologies and Materials (1989), pp 22-24.
Calka, “Direct Synthesis of AL-ALN composites by room temperature magneto ball milling: The effect of milling condition on formation of nanostructures”, NanoStructured Materials, vol 6, pp 409-412, 1995 Elsevier Science Ltd.
Yawei , “Carbothermal reduction synthesis of aluminium oxynitride spinel powders at low temperatures”, Journal of Materials Science Letters 16 (1997) pp 185-186, 1997 Chapman & Hall.
Yawei, “The formation and stability of gamma-aluminium oxynitride spinel in the carbothermal reduction and reaction sintering processes”, Journal of Materials Science 32 (1997) pp 979-982, 1997 Chapman & Hall.
McCauley, “Phase Relations and Reaction Sintering of Transparent Cubic Aluminum Oxynitride Spinel (ALON)”, Journal of The American Ceramic Society, vol. 62, No. 9-10 pp 476-479.
Cheng, “Microwave reactive sintering to fully transparent aluminum oxynitride (ALON) ceramics”, Journal of Materials Science Letters 20, 2001, pp 77-79, 2001 Kluwer Academic Publishers.
Tseng, “Carbothermal reduction and nitridation of aluminium hydroxide”, Journal of Materials Science 31 (1996) pp 3559-3565, 1996 Chapman & Hall.
Yawei, “The formation and stability of gama-aluminium oxynitride spinel in the carbothermal reduction and reaction sintering processes”, Journal of Materials Science 32 (1997) pp 979-982, 1997 Chapman & Hall.
Fukuyama, “New Synthetic Method of Forming Aluminum Oxynitride by Plasma Arc Melting”, Journal of the American Ceramic Society, 82 (6) pp 1381-87 (1999).
Cheng, “Microwave Synthesis of aluminum oxynitride (ALON)”, Journal of Materials Science Letters 18 (1999) pp 1989-1990, 1999 Kluwer Academic Publishers.
Langel Wayne A.
Nanomat, Inc.
Shannan Paul J.
LandOfFree
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