Remarkable hydrostatic piezoelectric response of novel 2–0–2 composites

ABSTRACT

This is the first study of the significant influence of the 0–3 ceramic / polymer layer on the hydrostatic piezoelectric parameters of novel 2–0–2 relaxor-ferroelectric single crystal / ferroelectric ceramic / polymer composites. Examples of the performance of two 2–0–2 composites based on domain-engineered single crystals are analysed by taking into account the elastic anisotropy of the 0–3 ceramic/polymer layers with changes in the volume fraction of ceramic inclusions and their aspect ratio. The unique feature of the hydrostatic properties of the studied 2–0–2 composites consists in their large values of piezoelectric coefficients $d*_h$ ≈ 1 nC/N and $e*_h$ ≈ 20 C/m², squared figure of merit $d*_h$$g*_h$∼ 10⁻¹⁰ Pa⁻¹, and electromechanical coupling factor $k*_h$ ≈ 0.7.

KEYWORDS:

• Piezo-composite based on relaxor-ferroelectric
• hydrostatic piezoelectric coefficient
• elastic properties
• aspect ratio

Acknowledgments

The authors would like to thank Prof. Dr. A. A. Nesterov, Prof. Dr. V. P. Sakhnenko, and Prof. Dr. I. A. Parinov (Southern Federal University, Russia), and Prof. Dr. S.-H. Chang (National Kaohsiung Marine University, Taiwan, ROC) for their interest in the research problem. The results on the research work No. 1597 have been represented within the framework of the base part of the state task No. 2014/174 in the scientific activity area at the Southern Federal University (Russia). Prof. Dr. C. R. Bowen acknowledges funding from the European Research Council under the European Union's Seventh Framework Programme (FP/2007–2013) / ERC Grant Agreement no.320963 on Novel Energy Materials, Engineering Science and Integrated Systems (NEMESIS).