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Electric properties of single‐crystal PMN‐31% PT/epoxy 1–3 piezoelectric composites
Author(s) -
Wang Haixia,
Xu Haiqing,
He Tianhou,
Zhao Xiangyong,
Luo Haosu,
Yin Zhiwen
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.200521044
Subject(s) - piezoelectricity , materials science , dielectric , composite material , volume fraction , epoxy , electromechanical coupling coefficient , fabrication , piezoelectric coefficient , pmut , coupling (piping) , vibration , acoustics , optoelectronics , medicine , alternative medicine , pathology , physics
PMN‐31% PT/expoxy 1–3 piezoelectric composites with a different volume fraction of PMN‐31% PT single crystals from 0.4 to 0.7 have been studied as regards fabrication and electric properties. The 〈001〉 oriented piezoelectric composites exhibit functional properties of low dielectric constant, high electromechanical coupling coefficient (0.80), and low acoustic impendence compared to the 〈110〉 oriented ones. The vibration characteristics of the piezoelectric composites strongly depend on the rod geometry and the volume fraction. The results obtained indicate that these piezoelectric composites with better global properties are promising candidates for biomedical imaging and underwater transducer applications. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)