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Effect of Preparation Methods and Condition of Precursors on the Phase Composition of Yttria‐Stabilized Zirconia Powders
Author(s) -
Gongyi Guo,
Yuli Chen
Publication year - 1992
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.1151-2916.1992.tb05576.x
Subject(s) - monoclinic crystal system , cubic zirconia , yttria stabilized zirconia , raman spectroscopy , materials science , phase (matter) , chemical engineering , amorphous solid , inorganic chemistry , mineralogy , crystallography , chemistry , crystal structure , ceramic , organic chemistry , metallurgy , physics , optics , engineering
An yttria‐stabilized zirconia powder, free of monoclinic phase, may be prepared by an oxalate method in an ethanol solution at strong acidity. This study demonstrates that the control of pH in the preparation of precursors has a significant effect on the ability of precursors to crystallize and hence plays an important role in determining the formation and fraction of various crystalline phases in the resulting yttria‐stabilized zirconia powder. With the increase of pH, a precursor with a certain crystalline form may be transformed into an amorphous precursor, and a monoclinic phase appers in the phase composition of the resulting powder. The results of XRD analysis and Raman spectroscopy are discussed.