Influence of Phase Composition on the Piezoelectric Properties of PMN-PT Ceramic

Abstract

Abstract: The influence of chemical and phase composition on the piezoelectric properties of PMN-PT ceramics with
chemical compositions near the morphotropic phase boundary(MPB) sintered at different temperatures was investigated. It showed that a phase
conversion from rhombohedral to tetragonal phase took place when the sintering temperature of PMN-PT ceramic with a definite chemical composition increased.
Meanwhile, the piezoelectric properties of PMN-PT ceramics were significantly enhanced when the amount of rhombohedral phase approached to that of tetragonal
phase in ceramics. At the same time, it was discovered that the chemical composition corresponding to optimal piezoelectric properties varied with the
change of sintering temperature. Based on above results, the authors found that the piezoelectric properties of PMN-PT near the MPB are not only related
to the chemical composition but also significantly impacted by the phase composition in ceramics. With the change of sintering temperature, the MPB
of PMN-PT ceramic system shifts slightly.

Key words: chemical composition, phase composition, MPB, piezoelectric properties

CLC Number:

O742

ZHU Wei-Min,LI Cheng-En,GUO Chun-Ji,YAN Li-Hua. Influence of Phase Composition on the Piezoelectric Properties of PMN-PT Ceramic[J]. Journal of Inorganic Materials.

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Influence of Phase Composition on the Piezoelectric Properties of PMN-PT Ceramic

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