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Indirect Determination of the Piezospectroscopic Coefficients of Ceria‐Stabilized Tetragonal Zirconia Polycrystals
Author(s) -
Tomaszewski Henryk,
Strzeszewski Jan,
Adamowicz Lech,
Sergo Valter
Publication year - 2002
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.1151-2916.2002.tb00543.x
Subject(s) - materials science , tetragonal crystal system , ceramic , raman spectroscopy , pellets , cubic zirconia , stress (linguistics) , grain size , composite material , mineralogy , phase (matter) , optics , chemistry , linguistics , physics , philosophy , organic chemistry
A method is proposed for the indirect determination of the stress dependence (expressed as piezospectroscopic (PS) coefficients) of spectroscopic bands of ceramic materials/phases. This method is based on the intimate mixture (intimate at the microstructural, grain‐size level) of two phases/materials when the stress in one is independently known; it is used to determine the PS coefficients of the most intense Raman bands in ceria‐stabilized tetragonal zirconia polycrystals (Ce‐TZP). Different amounts of Ce‐TZP were mixed with alumina and the composite pellets sintered; subsequently, the stress in alumina was determined through the PS coefficient of its R2 luminescence band and the stress in Ce‐TZP derived from the static equilibrium condition. The frequency shifts of each Raman band of Ce‐TZP have been plotted against the stress and the slopes provide the PS coefficients. The method has the advantage of not requiring any type of loading device (i.e., diamond anvil‐cell, bending jig). Finally, the limits are also discussed, the most important one being the requirement of immiscibility of the two materials/phases.