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

ABSTRACT: 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.

SUBMITTER: Cardoso JPV 

PROVIDER: S-EPMC9570801 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Annealing-Dependent Morphotropic Phase Boundary in the BiMg<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>3</sub>-BiZn<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>3</sub> Perovskite System.

Cardoso João Pedro V JPV   Shvartsman Vladimir V VV   Pushkarev Anatoli V AV   Radyush Yuriy V YV   Olekhnovich Nikolai M NM   Khalyavin Dmitry D DD   Čižmár Erik E   Feher Alexander A   Salak Andrei N AN  

Materials (Basel, Switzerland) 20221009 19

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  ...[more]

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