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Effects of Sm 2 O 3 and Gd 2 O 3 + Nd 2 O 3 on Electromechanical Properties of PbTiO 3 Ceramics
Author(s) -
Xue W. R.,
Schulze Walter A.,
Newnham Robert E.
Publication year - 1990
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.1151-2916.1990.tb09834.x
Subject(s) - ceramic , materials science , curie temperature , anisotropy , analytical chemistry (journal) , radius , range (aeronautics) , chemical composition , mineralogy , coupling (piping) , condensed matter physics , composite material , chemistry , thermodynamics , optics , physics , ferromagnetism , computer security , chromatography , computer science
The electromechanical properties of PbTiO 3 ceramics, modified by substitution of Sm or Gd + Nd (same average atomic radius as Sm) for Pb, were studied in the range of 6% to 14% substitution. The modified PbTiO 3 ceramics were stable, and the Curie temperature decreased linearly over this composition range. The 10% Sm composition had a large anisotropy in the coupling factor ratio, k t / k p , and a similar, but weaker, effect developed for 12% (1/2 Gd + 1/2 Nd). This indicates that other than average ion size may influence the electromechanical coupling factor ratio.