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Dielectric and Piezoelectric Properties of (1− x ) K 0.5 Bi 0.5 TiO 3 – x Ba ( Ti 0.8 Zr 0.2 ) O 3 Ceramics
Author(s) -
Zeb Aurang,
Milne Steven J.
Publication year - 2013
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/jace.12425
Subject(s) - materials science , piezoelectricity , dielectric , ferroelectricity , analytical chemistry (journal) , x ray crystallography , permittivity , piezoelectric coefficient , phase transition , ceramic , thermal expansion , phase (matter) , mineralogy , diffraction , crystallography , condensed matter physics , optics , composite material , chemistry , physics , optoelectronics , organic chemistry , chromatography
The properties of relaxor ceramics in the compositional series (1− x ) K 0.5 Bi 0.5 TiO 3 – x Ba ( Ti 0.8 Zr 0.2 ) O 3 have been investigated. Values of T m , the temperature of maximum relative permittivity, decreased from 380°C at x = 0.0 to below room temperature for x > 0.7. Compositions x = 0.1 and 0.2 were piezoelectric and ferroelectric. The maximum value of d 33 piezoelectric charge coefficient, 130 pC/N, and strain, 0.14%, occurred at x = 0.1. Piezoelectric properties of x = 0.1 were retained after thermal cycling from room temperature to 220°C, consistent with results from high‐temperature X‐ray diffraction indicating a transition to single‐phase cubic at ~300°C.
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