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

The annealing behavior of (1-x)BiMg0.5Ti0.5O3–xBiZn0.5Ti0.5O3 [(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.

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Date Issued:
09.10.2022
DOI:
10.3390/ma15196998
URN:
urn:nbn:de:hbz:465-20230323-091031-2
Language:
English
Type of Resource:
Text
Keywords:
lead-free; high-pressure synthesis; conversion polymorphism; X-ray diffraction; piezoresponse force microscopy
Collection:
E-Publications
Subject categories of the Deutsche Nationalbibliografie:
620 Engineering & allied operations
Hosting institution:
Faculty of Engineering, Bauwissenschaften, Bauingenieurwesen, Materialwissenschaft
funding:

The publication of this article was supported by the Publication Fund of the University of Duisburg-Essen.

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Version of Record / Verlagsversion
Info on primary publication:

Cardoso, J. P. V., Shvartsman, V. V., Pushkarev, A. V., Radyush, Y. V., Olekhnovich, N. M., Khalyavin, D. D., Čižmár, E., Feher, A., & Salak, A. N. (2022). Annealing-Dependent Morphotropic Phase Boundary in the BiMg0.5Ti0.5O3–BiZn0.5Ti0.5O3 Perovskite System. Materials, 15(19), 6998. https://doi.org/10.3390/ma15196998

Published: 9 October 2022

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