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Dielectric and Piezoelectric Properties in the System: (1− x )[(Na 0.5 K 0.5 NbO 3 ) 0.93 –(LiTaO 3 ) 0.07 ]– x [BiScO 3 ]
Author(s) -
Skidmore Thomas A.,
Comyn Timothy P.,
Milne Steven J.
Publication year - 2010
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.1551-2916.2009.03470.x
Subject(s) - materials science , dielectric , tetragonal crystal system , piezoelectricity , grain size , solid solution , natural bond orbital , mineralogy , analytical chemistry (journal) , diffraction , dielectric loss , crystallography , crystal structure , composite material , chemistry , optics , metallurgy , physics , optoelectronics , density functional theory , computational chemistry , chromatography
Solid solution formation in the system (1− x ) [(Na 0.5 K 0.5 NbO3) 0.93 –(LiTaO 3 ) 0.07 ]− x [BiScO 3 ] has been investigated for compositions, 0≤ x ≤0.05. The tetragonal c/a ratio decreases with increasing BiScO 3 content, with a discontinuity at x =0.02, X‐ray diffraction patterns appear pseudo‐cubic for x >0.02. There is a 10‐fold reduction in grain size between x =0.015 and x =0.02: dielectric peaks become suppressed and broadened at this point. Piezoelectric d 33 charge coefficients decrease across the compositional range. Results are discussed in terms of chemical inhomogeneity and grain‐size effects.