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The Cubic Field in the System CaO‐ZrO 2
Author(s) -
GARVIE RONALD C.
Publication year - 1968
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.1151-2916.1968.tb13320.x
Subject(s) - lattice (music) , lattice constant , materials science , phase (matter) , mineralogy , reagent , oxide , analytical chemistry (journal) , crystallography , chemistry , optics , metallurgy , physics , diffraction , organic chemistry , acoustics
The range of existence of the cubic phase in the system CaO‐ZrO 2 was determined at temperatures from 1300° to 1700°C, using the lattice parameter method. This technique could not be used at higher temperatures because of anomalous changes in the lattice parameter. The possibility of the existence of a compound, CaZr 4 O 9 , occurring at 20 mole % CaO, was inferred from X‐ray data. The (hypothesized) compound appeared to undergo a phase transformation at about 1650°C. The cubic field was widened when CaCO 2 was substituted for CaO as a reagent, probably because of the formation of an intermediate active oxide. This widening of the field may shed light on some of the discrepancies in the literature.