LiF-coated doped and undoped yttrium oxide

Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter

Reexamination Certificate

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Details

C428S404000, C428S405000, C428S406000, C428S407000, C501S094000

Reexamination Certificate

active

07449238

ABSTRACT:
An embodiment of the invention includes a particle. The particle includes a first yttria core; and a fluoride salt coating on the first yttria core. The coating is sufficiently continuous to prevent a large number of sites where a second yttria core may come into contact with the first yttria core. Optionally, the particle has been heated in an oxidizing atmosphere to a temperature in the range of about 400° C. to about 750° C. Optionally, the particle is substantially free of at least one of carbon-containing species and water. Optionally, the fluoride salt is lithium fluoride. Optionally, the fluoride salt is aluminum fluoride.

REFERENCES:
patent: 4134777 (1979-01-01), Borom
patent: 4837187 (1989-06-01), Frank et al.
patent: 5401309 (1995-03-01), Chopin et al.
patent: 5409871 (1995-04-01), Dodds et al.
patent: 5580837 (1996-12-01), Dodds et al.
patent: 6080485 (2000-06-01), Wataya
patent: 7211325 (2007-05-01), Villalobos et al.

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