Compositions: ceramic – Ceramic compositions – Yttrium – lanthanide – actinide – or transactinide containing
Reexamination Certificate
2006-04-06
2008-09-23
Group, Karl E (Department: 1793)
Compositions: ceramic
Ceramic compositions
Yttrium, lanthanide, actinide, or transactinide containing
C501S153000
Reexamination Certificate
active
07427577
ABSTRACT:
A composition is provided that includes a plurality of calcined particles of terbium aluminum oxide having a mean particle domain size of between 30 and 600 nanometers. A translucent article having a surface includes polycrystalline terbium aluminum garnet having a mean grain size from 1 to 10 microns and light scattering inclusions of aluminum-rich oxide and/or terbium-rich oxide that are present at less than 2 surface area percent of the surface. A process for forming such an article involves sintering the above provided composition at a temperature between 1500° C. and 1700° C. to yield a sintered article. The article has improved translucency and even transparency as sintering is performed under vacuum at a temperature between 1610° C. and 1680° C. Hot isostatic pressing alone or in combination with article polishing also improves article translucency.
REFERENCES:
patent: 2239551 (1941-04-01), Dalton et al.
patent: 2272342 (1942-02-01), Hyde
patent: 2326059 (1943-08-01), Norberg
patent: 4026816 (1977-05-01), Ranby et al.
patent: 4631144 (1986-12-01), Beers et al.
patent: 5245689 (1993-09-01), Gualtieri
patent: 5358695 (1994-10-01), Helble et al.
patent: 5368834 (1994-11-01), Kulwicki et al.
patent: 5378665 (1995-01-01), Chen et al.
patent: 5614596 (1997-03-01), Laine et al.
patent: 5652021 (1997-07-01), Hunt et al.
patent: 5858465 (1999-01-01), Hunt et al.
patent: 5863604 (1999-01-01), Hunt et al.
patent: 5958361 (1999-09-01), Laine et al.
patent: 5958367 (1999-09-01), Ying et al.
patent: 6013318 (2000-01-01), Hunt et al.
patent: 6114188 (2000-09-01), Oliver et al.
patent: 6493139 (2002-12-01), Liu et al.
patent: 6580546 (2003-06-01), Liu et al.
patent: 6596195 (2003-07-01), Srivastava et al.
patent: 6630077 (2003-10-01), Shiang et al.
patent: 7169326 (2007-01-01), Wu et al.
patent: 2002/0195587 (2002-12-01), Srivastava et al.
patent: 2007/0187645 (2007-08-01), Lyons et al.
patent: 265192 (1949-11-01), None
patent: 4-118623 (1992-04-01), None
patent: 5-88126 (1993-04-01), None
patent: 9-2867 (1997-01-01), None
patent: WO 00/38282 (2000-06-01), None
patent: WO-2006013673 (2006-02-01), None
Preparation and characterization of Y3A15O12(YAG) nano-powder by co-precipitation method; J.Su et al; Jul. 15, 2004; Anhal Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefel 230031, PR China.
Luminescence properties of Tb3+:Y3A15O12nanocrystallites prepared by the sol-gel methods; D. Hrenlak et al; Dec. 12, 2003; Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul.
Growth of Tb3Ga5O12fiber and bulk crystals using micro-pulling-down apparatus; Valery I. Chani et al; Nov. 15, 1999; Institute for Materials Research, Tokohu University.
Crystallization and Phase Equilibria in the Tb2O3-Ga2O3System; Yu Udalov et al; Oct. 26, 2001: Grebenshchikov Institute of Silicate Chemistry.
Growth of terbium aluminum garnet (Tb3A15O12; TAG) single crystals by the hybrid laser floating zone machine; Mikio Geho et al; Jan. 19, 2004; Murata Manufacturing Co., Ltd., 26-10.
Compact Optical Isolator; F.J. Sansalone; Oct. 1971/vol. 10, No. 10/Applied Optics.
On the Crystallization of Terbium Aluminum Garnet; S. Granshow et al; Institut fur Kristallzuchtung; Berlin, Germany—1999 pp. 615-619.
Magneto-Optical Properties of Rare Earth (III) Aluminum Garnets C.B Rubinstein et al.; Bell Telephone Laboratories, Incorporated, Murray Hill, New Jersey; Apr. 20, 1964.
Ryan Rowley and Henry Chu, Ph.D., Processing variables of alumina slips and their effects on the density and grain size of the sintered sample, U.S. Department of Energy Journal of Undergraduate Research, pp. 71-74.
Darfus, Jason D., The Faraday Effect, May 1, 1997.
Rubinstein, C.B., et al., Magneto-Optical Properties of Rare Earth (III) Aluminum Garnets, Communications, pp. 3069-3070.
Sansalone, F.J., Compact Optical Isolator, Applied Optics, vol. 10, No. 10, pp. 2329-2331.
Geho, Mikio, et al., Growth of terblum aluminum garnet (Tb3A15O12; TAG) single crystals by the hybrid laser floating zone machine, Journal of Crystal Growth, 267 (2004) 188-193, pp. 188-193, Mar. 22, 2004.
Hinklin Tom
Nguyen Long
Rhodes William H.
Scerbak David
Sutorik Anthony C.
Gifford, Krass, Sprinkle et al.
Group Karl E
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