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Title: Investigation of La3+ doping effect on piezoelectric coefficients of BLT ceramics
Authors: Wodecka-Duś, Beata
Kozielski, Lucjan
Erhart, Jiri
Pawełczyk, Marian
Radoszewska, Daria
Adamczyk, Małgorzata
Bochenek, Dariusz
Keywords: BLT; Lead-free piezoelectric ceramics; Piezoelectric coefficients
Issue Date: 2017
Citation: Archives of Metallurgy and Materials, Vol. 62, Iss. 2 (2017), p. 691-696
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 resonance-antiresonance 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 ϵ33 T = 29277.
DOI: 10.1515/amm-2017-0103
ISSN: 1733-3490
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