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Phase Transformation Kinetics in the System Bismuth Oxide‐Zirconia
Author(s) -
Takamori Takeshi,
Shafer Merrill W.
Publication year - 1990
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.1151-2916.1990.tb05227.x
Subject(s) - solidus , monoclinic crystal system , materials science , phase (matter) , cubic zirconia , bismuth , differential thermal analysis , metastability , tetragonal crystal system , solubility , analytical chemistry (journal) , kinetics , oxide , mineralogy , crystallography , diffraction , chemistry , metallurgy , crystal structure , ceramic , chromatography , optics , physics , organic chemistry , alloy , quantum mechanics
The effect of ZrO 2 addition on the phase transformation of Bi 2 O 3 was studied with powder X‐ray diffraction and differential thermal analysis. Samples containing higher than a few mole percent ZrO 2 were obtained as the metastable β phase (tetragonal) at room temperature when they were cooled at 20°C/min from 800°C where the δ phase (fcc) is stable. When the same samples were cooled at the same rate from 1000°C, which is above the solidus, they formed the stable α phase (monoclinic) at room temperature. Evidence for the relatively higher solubility of ZrO 2 in the α phase is discussed to explain this observation.