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Temperature dependence of piezoelectric properties of high-T[sub C] Bi(Mg[sub 1/2]Ti[sub 1/2])O[sub 3]–PbTiO[sub 3]

Chen, Jun and Tan, Xiaoli and Jo, Wook and Rödel, Jürgen (2009):
Temperature dependence of piezoelectric properties of high-T[sub C] Bi(Mg[sub 1/2]Ti[sub 1/2])O[sub 3]–PbTiO[sub 3].
In: Journal of Applied Physics, pp. 034109-1-034109-7, 106, (3), ISSN 00218979, [Online-Edition: http://dx.doi.org/10.1063/1.3191666],
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Abstract

The temperature dependence of both polarization and electric-field induced strain was investigated for (1−x)Bi(Mg1/2Ti1/2)O3–xPbTiO3 (x = 0.36, 0.37, and 0.38), with the morphotropic phase boundary located at x = 0.37. Remanent polarization (Pr) and maximum polarization (Pmax) of all compositions are enhanced with increasing temperature up to 175 °C, which is rationalized as improved domain switching due to reduced tetragonality (c/a). The hysteresis during unipolar electric cycling tends to decrease with increase in the fraction of tetragonal phase. Temperature dependent x-ray diffraction demonstrates that switched non-180° domains are stable against thermal depoling above 200 °C, which indicates that the currently investigated materials are suitable for high temperature applications. This promising high-TC piezoelectric is further discussed with reference to oxygen octahedron of the tilted R3c and untilted R3m space groups and the tolerance factor (t).

Item Type: Article
Erschienen: 2009
Creators: Chen, Jun and Tan, Xiaoli and Jo, Wook and Rödel, Jürgen
Title: Temperature dependence of piezoelectric properties of high-T[sub C] Bi(Mg[sub 1/2]Ti[sub 1/2])O[sub 3]–PbTiO[sub 3]
Language: English
Abstract:

The temperature dependence of both polarization and electric-field induced strain was investigated for (1−x)Bi(Mg1/2Ti1/2)O3–xPbTiO3 (x = 0.36, 0.37, and 0.38), with the morphotropic phase boundary located at x = 0.37. Remanent polarization (Pr) and maximum polarization (Pmax) of all compositions are enhanced with increasing temperature up to 175 °C, which is rationalized as improved domain switching due to reduced tetragonality (c/a). The hysteresis during unipolar electric cycling tends to decrease with increase in the fraction of tetragonal phase. Temperature dependent x-ray diffraction demonstrates that switched non-180° domains are stable against thermal depoling above 200 °C, which indicates that the currently investigated materials are suitable for high temperature applications. This promising high-TC piezoelectric is further discussed with reference to oxygen octahedron of the tilted R3c and untilted R3m space groups and the tolerance factor (t).

Journal or Publication Title: Journal of Applied Physics
Volume: 106
Number: 3
Uncontrolled Keywords: bismuth compounds, dielectric hysteresis, dielectric polarisation, electric domains, ferroelectric switching, ferroelectric transitions, lead compounds, piezoelectric materials, space groups, X-ray diffraction
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 15 Jun 2011 08:15
Official URL: http://dx.doi.org/10.1063/1.3191666
Identification Number: doi:10.1063/1.3191666
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