Annealing-Dependent Morphotropic Phase Boundary in the BiMg0.5Ti0.5O3-BiZn0.5Ti0.5O3 Perovskite System


The annealing behavior of (1-x)BiMg0.5Ti0.5O3-xBiZn(0.5)Ti(0.5)O(3) [(1-x)BMT-xBZT] perovskite solid solutions synthesized under high pressure was studied in situ via X-ray diffraction and piezoresponse force microscopy. The as prepared ceramics show a morphotropic phase boundary (MPB) between the non-polar orthorhombic and ferroelectric tetragonal states at 75 mol. % BZT. It is shown that annealing above 573 K results in irreversible changes in the phase diagram. Namely, for compositions with 0.2 < x < 0.6, the initial orthorhombic phase transforms into a ferroelectric rhombohedral phase. The new MPB between the rhombohedral and tetragonal phases lies at a lower BZT content of 60 mol. %. The phase diagram of the BMT-BZT annealed ceramics is formally analogous to that of the commercial piezoelectric material lead zirconate titanate. This makes the BMT-BZT system promising for the development of environmentally friendly piezoelectric ceramics.



subject category

Chemistry; Materials Science; Metallurgy & Metallurgical Engineering; Physics


Cardoso, JPV; Shvartsman, VV; Pushkarev, AV; Radyush, YV; Olekhnovich, NM; Khalyavin, DD; Cizmar, E; Feher, A; Salak, AN

our authors


This research was funded by the bilateral Slovakia-Belarus project Novel environmentfriendly materials for microelectronics based on complex bismuth-containing oxides with perovskite structure synthesized under high pressure through grants APVV-SK-BY-RD-19-0008 and T20SLKG-001, respectively. A.N.S. and V.V.S. acknowledge the support of the bilateral PortugalGermany (FCT-DAAD) project PZT-FREE (grants 2021.09702.CBM and 57610755, respectively). J.P.C. was funded by the FCT-Portuguese Foundation for Science and Technology for the PhD grant SFRH/BD/145281/2019. The research done in the University of Aveiro was supported by the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020, financed by national funds through the FCT/MEC (PIDDAC).

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