Investigation of La3 doping effect on piezoelectric coefficients of BLT ceramics
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Date
2017
Journal Title
Journal ISSN
Volume Title
Publisher
Walter de Gruyter GmbH
Abstract
Effects of La3+ admixture in barium lanthanum titanate (BLT) ceramics system with colossal permittivity on performance of
prospective piezoelectric cold plasma application were studied. Usage of cold atmospheric pressure plasma appears promising in
terms of industrial and healthcare applications. Performed investigation provide consistent evaluation of doping lanthanum amount
on piezoelectric coefficients values with simultaneous capability of charge accumulation for effective plasma generation. Modification of ferroelectric materials with heterovalent ions, however with the lower radii than the original atoms, significantly affects
their domain mobility and consequently electromechanical properties. To determine the piezoelectric coefficients, the resonanceantiresonance method was implemented, and values of piezoelectric and dielectric parameters were recorded. Finally the results
indicated that addition of 0.4 mol.% of La3+ ions to the ceramic structure maximally increased the values of piezoelectric coefficient
to d33 = 20 pC/N and to huge dielectric constant to ε33T
= 29277.
Description
Subject(s)
BLT, piezoelectric coefficients, lead-free piezoelectric ceramics
Citation
ISSN
2300-1909