Fe-Doped Barium Lanthanum Titanate as a Competitor to Other Lead-Free Piezoelectric Ceramics

Beata Wodecka-Duś; Lucjan Kozielski; Jolanta Makowska; Mateusz Bara; Małgorzata Adamczyk-Habrajska

doi:10.3390/ma15031089

Fe-Doped Barium Lanthanum Titanate as a Competitor to Other Lead-Free Piezoelectric Ceramics

Materials (Basel). 2022 Jan 30;15(3):1089. doi: 10.3390/ma15031089.

Authors

Beata Wodecka-Duś¹, Lucjan Kozielski¹, Jolanta Makowska¹, Mateusz Bara¹, Małgorzata Adamczyk-Habrajska¹

Affiliation

¹ Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 41-500 Chorzów, Poland.

Abstract

Multiferroic solid solutions of Ba_1-xLa_xTi_1-x/4O₃ and iron (BLFT) were synthesized using the conventional mixed oxide method. The dependence of the piezoelectric coefficients on Fe content in BLFT ceramics was determined by the quasi-static and resonance method. The results indicate that 0.3 mol% addition of Fe³⁺ ions to the ceramic structure increased the value of the piezoelectric parameter d₃₃ to the maximum of 159 pC/N. This puts BLFT ceramics among other good-quality and lead-free piezoelectric ceramics. A major enhancement of dielectric properties related to the manipulation of Fe content in the barium lanthanum titanate (BLT) ceramics system is reported as well.

Keywords: BLT; lead-free multiferroic solid solution; piezoelectric coefficients.

Grants and funding

Research Excellence Initiative program of the University of Silesia in Katowice