Effects of poling over the orthorhombic-tetragonal phase transition temperature in compositionally homogeneous (K, Na)NbO(3)-based ceramics
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Autor:
Morozov, MI; Kungl, H; Hoffmann, MJ
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Quelle:
APPLIED PHYSICS LETTERS, 2011, Band 98, Heft 13
Abstract
Li-, Ta-, and Mn- modified (K, Na)NbO(3) ceramics with various
compositional homogeneity have been prepared by conventional and
precursor methods. The homogeneous ceramic has demonstrated a sharper
peak in temperature dependent piezoelectric response. The dielectric and
piezoelectric properties of the homogeneous ceramics have been
characterized at the experimental subcoercive electric fields near the
temperature of the orthorhombic-tetragonal phase transition with respect
to poling in both phases. Poling in the tetragonal phase is shown to
enhance the low-signal dielectric and piezoelectric properties in the
orthorhombic phase. (C) 2011 American Institute of Physics.