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Electromechanical Properties of Lead Titanate Zirconate Ceramics with Lead Partially Replaced by Calcium or Strontium
Author(s) -
KULCSAR FRANK
Publication year - 1959
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.1151-2916.1959.tb09141.x
Subject(s) - dielectric , ceramic , materials science , lead zirconate titanate , strontium , zirconate , mineralogy , lead titanate , calcium titanate , lead (geology) , strontium titanate , curie temperature , planar , titanate , phase boundary , ferroelectricity , composite material , condensed matter physics , chemistry , optoelectronics , geology , phase (matter) , physics , computer graphics (images) , organic chemistry , geomorphology , computer science , ferromagnetism
By partially substituting Sr for Pb in ceramic lead titanate zirconate compositions near the morpho‐tropic boundary, dielectric constants greater than 1300 can be obtained along with planar couplings of about 0.50. Calcium also raises the dielectric constant, but the planar coupling level is considerably lower than that obtained with Sr. Other effects noted with Sr are a lowering of the Curie temperature, a shift in the morphotropic boundary toward the rhombohedral side, and a decrease in the distortion from cubic symmetry. In addition, Sr was found to be effective as a fluxing agent.