Dense Chromium Sesquioxide

Author

P. D. Ownby, Missouri University of Science and TechnologyFollow

Abstract

A sintered, fine grained, polycrystalline, essentially fully dense, essentially single phase Cr₂O₃ body is prepared by sintering Chromium Sesquioxide (Cr₂O₃) at essentially the equilibrium oxygen partial pressure (P_O2) for the formation of CrO ₃ from its elements at the sintering temperature. To achieve optimum theoretical density a second metal oxide dopant such as MgO, capable of controlling the grain size, is added. In addition, Cr₂O₃ bodies are rendered more stable, and thus have a longer life, by maintaining over the body an atmosphere which is essentially equilibrium Po, for the formation of Cr₂O₃, from its elements at that temperature.

Recommended Citation

P. D. Ownby, "Dense Chromium Sesquioxide," U.S. Patents, Oct 1977.

Department(s)

Materials Science and Engineering

Patent Application Number

US05/359,661

Patent Number

US4054627A

Document Type

Patent

Document Version

Final Version

File Type

text

Language(s)

English

Publication Date

18 Oct 1977