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Phase diagram and enhanced piezoelectricity in the strontium titanate doped potassium–sodium niobate solid solution
Author(s) -
Wang Ruiping,
Xie RongJun,
Hanada Kotaro,
Matsusaki Kunio,
Bando Hiroshi,
Itoh Mitsuru
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200510014
Subject(s) - phase boundary , materials science , piezoelectricity , phase diagram , dielectric , orthorhombic crystal system , potassium niobate , solid solution , tetragonal crystal system , ceramic , doping , analytical chemistry (journal) , phase (matter) , titanate , strontium , ferroelectricity , mineralogy , chemistry , composite material , crystal structure , crystallography , optoelectronics , organic chemistry , metallurgy
The dielectric and the piezoelectric properties of the (1– x )(Na 0.5 K 0.5 )NbO 3 – x SrTiO 3 ceramics, densified by the Spark‐Plasma‐Sintering method, have been studied. A phase diagram was established from the temperature dependence of the dielectric constant. A tetragonal–orthorhombic morpho‐tropic phase boundary (MPB) was found at x ∼ 0.05. Around the MPB, piezoelectric properties were greatly improved. The origin for the enhanced piezoelectricity has been proposed. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)