Critical particle size and phase transformation in zirconia; Transmission electron microscopy and X-ray diffraction Studies

Journal Article · Wed Oct 31 23:00:00 EST 1990 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb06492.x· OSTI ID:5162152

Srinivason, R; Davis, B H ^[1]; Rice, L ^[2]

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1. Center for Applied Energy Research, Lexington, KY (US)
2. Dept. of Materials Science and Engineering, Univ. of Kentucky, Lexington, KY (US)

A study was undertaken to examine the crystallite size effect on the low-temperature transformation of tetragonal zirconia. Zirconia was prepared by precipitation from a solution of zirconium tetrachloride by adding ammonium hydroxide to produce a pH of 2.95. Portions of the sample, after drying, were calcined at 500{degrees}C for various time intervals. Phase transformation was followed by X-ray diffraction; the data show that the tetragonal phase was initially formed and it was transformed to the monoclinic phase at longer periods of calcination. It was observed by TEM particle size and XRD crystallite size that the transformation does not appear to be due to a critical particle size effect.

• OSTI ID: 5162152
• Journal Information: Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 73:11; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHASE TRANSFORMATIONS
SCATTERING
SIZE
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES