Ba/Sr doped electrostrictive compositions for actuator design

Zhiqiang Zhuang, Lijun Jan, S. B. Kang, B. Gallois, Z. Yang, H. Du

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish
Pages (from-to)77-82
Number of pages6
JournalMaterials Research Society Symposium Proceedings
Volume360
StatePublished - 1995
EventProceedings of the 1994 MRS Fall Meeting - Boston, MA, USA
Duration: 28 Nov 199430 Nov 1994

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