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Determination of the Oxygen Self‐Diffusion Coefficients in Y 2 O 3 ‐Containing Tetragonal Zirconia Polycrystals by Raman Spectrometric Monitoring of the 16 O‐ 18 O Exchange Reaction
Author(s) -
Kim ByungKook,
Park SoonJa,
Hamaguchi Hiroo
Publication year - 1993
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.1151-2916.1993.tb08345.x
Subject(s) - raman spectroscopy , analytical chemistry (journal) , tetragonal crystal system , diffusion , oxygen , chemistry , cubic zirconia , spectroscopy , materials science , crystallography , crystal structure , ceramic , thermodynamics , physics , organic chemistry , chromatography , quantum mechanics , optics
A new method of determining the oxygen self‐diffusion coefficients (D) in oxides has been developed. The method is based on Raman spectroscopy combined with the 16 O– 18 O exchange technique. By using the time dependent 18 O2 concentration measured in a quasi in situ manner by Raman spectroscopy, the oxygen self‐diffusion coefficients are calculated. The calculation takes into account the influence of the surface exchange reaction and the limited gas volume. The result obtained in 2.8 mo1% Y 2 O 3 ‐containing tetragonal zirconia polycrystals is D = 1.55 ( +0.07 ‐0.07 ) x 10 ‐2 exp[(‐120.0 0.4) (kJ/mol) / RT ] cm 2 /sec. It was demonstrated that Raman spectroscopy is useful tool for determining the oxygen self‐diffusion coefficients in oxides.