Compositions: ceramic – Ceramic compositions – Yttrium – lanthanide – actinide – or transactinide containing
Patent
1987-02-02
1988-08-02
Dixon, Jr., William R.
Compositions: ceramic
Ceramic compositions
Yttrium, lanthanide, actinide, or transactinide containing
501126, 264 12, 264 56, 264 65, C04B 3550
Patent
active
047613904
ABSTRACT:
A transparent yttrium oxide ceramic is made by densifying a yttrium oxide powder without addition of dopants. The yttrium oxide powder is consolidated into a body of a predetermined shape and sintered to a density such that any remaining porosity is sealed from the surrounding atmosphere. The closed porosity body is then subjected to an elevated pressure and temperature to provide the body with substantially 100% of theoretical density. The resulting body has substantial transparency over the wavelength range of 0.6 .mu.m to 7 .mu.m.
REFERENCES:
patent: 3545987 (1970-12-01), Anderson
patent: 3640887 (1972-02-01), Anderson
patent: 3711585 (1973-01-01), Muta et al.
patent: 3764643 (1973-10-01), Muta et al.
patent: 3873657 (1975-03-01), Toda et al.
patent: 4098612 (1978-07-01), Rhodes et al.
patent: 4174973 (1979-11-01), Rhodes et al.
patent: 4571312 (1986-02-01), Greskovich et al.
W. D. Kingery, et al., "Grain, Growth, Sintering, and Vitrification," Introduction to Ceramics, John Wiley & Sons, NY (1960) pp. 448-469.
Andreeva, et al., "Structure and Optical Properties of Yttrium Oxide Films Prepared by Reaction Synthesis", Chemical Abstracts vol. 98 (1983), Abstr. No. 206711 q.
Rhodes et al., "Processing Studies for Optically Transparent La.sub.2 O.sub.3 -Doped Y.sub.2 O.sub.3 ", GTE Laboratories Inc., Jul. 31, 1986, Office of Naval Research Contract N00014-82-C-0452.
Chemical Abstracts 98:206711.
Gentilman Richard L.
Greenberg Michael
Hartnett Tom
Dixon Jr. William R.
Griffis Andrew B.
Maloney Denis G.
Raytheon Company
Sharkansky Richard M.
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