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The System CaO‐ThO 2 ‐ZrO 2
Author(s) -
ROEDER E. W. F.,
WILSON H. J. C.
Publication year - 1975
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1975.tb11434.x
Subject(s) - pyrochlore , metastability , fluorite , materials science , mineralogy , analytical chemistry (journal) , chemical composition , diffraction , crystallography , phase (matter) , chemistry , metallurgy , thermodynamics , optics , physics , organic chemistry , chromatography
The present investigation did not confirm the conclusion of Ruff et al. that certain compositions within the system CaO‐ThO 2 ‐ZrO 2 might solidify in the vitreous state. Although many ZrO 2 ‐rich samples were translucent after they were melted in an induction plasma torch, X‐ray diffraction indicated a crystalline structure of the fluorite type. When samples were annealed at 1400°C, the metastable phase decomposed, and translucency was lost. A section of the system at 1600°C is presented, together with a preliminary description of a pyrochlore‐type compound with the approximate composition 2CaO·2ThO 2 ·5ZrO 2 .