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Ba/sr Doped Electrostrictive Compositions for Actuator Design

Published online by Cambridge University Press:  16 February 2011

Zhiqiang Zhuang ,
Lijun Jan ,
S.B. Kang ,
B. Gallois ,
Z. Yang  and
H. Du
Zhiqiang Zhuang
Affiliation:
South China University of Technology, Dept. of Inorganic Materials Science and Engineering, Guangzhou, China, 510641
Lijun Jan
Affiliation:
South China University of Technology, Dept. of Inorganic Materials Science and Engineering, Guangzhou, China, 510641
S.B. Kang
Affiliation:
Stevens Institute of Technology, Dept. of Materials Science and Engineering, Hoboken, NJ 07030
B. Gallois
Affiliation:
Stevens Institute of Technology, Dept. of Materials Science and Engineering, Hoboken, NJ 07030
Z. Yang
Affiliation:
South China University of Technology, Dept. of Inorganic Materials Science and Engineering, Guangzhou, China, 510641
H. Du
Affiliation:
Stevens Institute of Technology, Dept. of Materials Science and Engineering, Hoboken, NJ 07030
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Abstract

Solid solutions of lead zirconate titanate (PZT) and lead magnesium niobate (PMN) doped with barium/strontium were developed for use in miniature electrostrictive actuators. The microstructural features of the materials were determined by high-resolution transmission electron microscopy (HREM) and by x-ray diffractometry. The response and the strain hysteresis were measured by applying a sinusoidal or a rectangular voltage pulse. Pulses of variable amplitude and width were applied to the elements to study the switching behavior of 90° domain walls in the materials and to elucidate the initial zero-position “walk off” mechanism. The strain hysteresis or remanent strain of PZT decreased with increasing PMN concentration. A barium-doped PZT (Ba-PZT) composition containing 4 mole% of PMN exhibited ferroelectric relator behavior with a field-induced strain much larger than those of lead magnesium niobate (PMN) electrostrictive materials and a small remanent strain hysteresis.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994 , 77
Copyright
Copyright © Materials Research Society 1995

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