The ternary perovskite system PbTiO3-Bi(Zn1/2Ti1/2)O3-Bi(Mg1/2Ti1/2)O3 was investigated in an attempt to capture the enhanced tetragonality of the PbTiO3-Bi(Zn1/2Ti1/2)O3 binary system at a morphotropic phase boundary (MPB) to improve piezoelectric performance. Results from the (1−x)[0.75 PbTiO3-0.25Bi(Zn1/2Ti1/2)O3]-(x)Bi(Mg1/2Ti1/2)O3 pseudo-binary solution indicate the formation of an MPB-type phase boundary with a high TC (585 °C at x = 0.55). Multiple dielectric transitions were observed in a region of the ternary diagram characterized by high occupancy of the A-site by Bi3+ (>40%) and the B-site by ferroelectrically active cations (>70%). Temperature-dependent diffraction studies revealed the persistence of a tetragonal structure in at least a subset of the crystal to the higher temperature dielectric transition.
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1 October 2011
Research Article|
October 11 2011
Multiple dielectric transitions in the PbTiO3-Bi(Zn1/2Ti1/2)O3-Bi(Mg1/2Ti1/2)O3 system
David M. Stein;
David M. Stein
1Department of Materials Science and Engineering,
University of Pennsylvania
, 3231 Walnut Street, Philadelphia, Pennsylvania 19104, USA
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Ilya Grinberg;
Ilya Grinberg
2Makineni Theoretical Laboratories, Department of Chemistry,
University of Pennsylvania
, Philadelphia, Pennsylvania 19104, USA
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Andrew M. Rappe;
Andrew M. Rappe
2Makineni Theoretical Laboratories, Department of Chemistry,
University of Pennsylvania
, Philadelphia, Pennsylvania 19104, USA
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Peter K. Davies
Peter K. Davies
a)
1Department of Materials Science and Engineering,
University of Pennsylvania
, 3231 Walnut Street, Philadelphia, Pennsylvania 19104, USA
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected].
J. Appl. Phys. 110, 074110 (2011)
Article history
Received:
December 29 2010
Accepted:
August 28 2011
Citation
David M. Stein, Ilya Grinberg, Andrew M. Rappe, Peter K. Davies; Multiple dielectric transitions in the PbTiO3-Bi(Zn1/2Ti1/2)O3-Bi(Mg1/2Ti1/2)O3 system. J. Appl. Phys. 1 October 2011; 110 (7): 074110. https://doi.org/10.1063/1.3646559
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