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Isothermal Phase Transitions in Ceramic Lead Zirconate
Author(s) -
WEIRAUCH DONALD F.,
TENNERY† VICTOR J.
Publication year - 1970
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.1151-2916.1970.tb12082.x
Subject(s) - antiferroelectricity , materials science , zirconate , ferroelectricity , dielectric , isothermal process , phase (matter) , phase transition , permittivity , ceramic , lead zirconate titanate , atmospheric temperature range , relative permittivity , ferroelectric ceramics , condensed matter physics , thermodynamics , composite material , chemistry , optoelectronics , titanate , physics , organic chemistry
Constant temperature permittivity measurements of ceramic lead zirconate near 230°C revealed that the paraelectric to ferroelectric, ferroelectric to antiferroelectric, and antiferroelectric to paraelectric phase transitions were isothermal transformations. On heating, the antiferroelectric phase transformed into a paraelectric phase. Cooling produced a transformation from the paraelectric into an intermediate ferroelectric phase which existed over a temperature range of about 5°C. On further cooling, the ferroelectric transformed into the antiferroelectric phase. Thermal expansion, relative permittivity, and dissipation factor data are reported.