Effects of uniaxial prestress on the ferroelectric hysteretic response of soft PZT

• Published in: Journal of the European Ceramic Society Vol. 25; no. 4; pp. 425 - 432
• Main Authors: Zhou, Dayu, Kamlah, Marc, Munz, Dietrich
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-04-2005; Elsevier
• Subjects: Applied sciences; Building materials. Ceramics. Glasses; Ceramic industries; Chemical industry and chemicals; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Dielectric and piezoelectric properties; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Domain switching; Electrotechnical and electronic ceramics; Exact sciences and technology; Niobates, titanates, tantalates, pzt ceramics, etc; Physics; Piezoceramics; Polarization; Preload stress; PZT; Strain; Technical ceramics; Polarization; Domain switching; Dielectric and piezoelectric properties; Preload stress; PZT; Piezoceramics; Strain; Electrical properties; Prestress; Lead titanates; Dielectric properties; Piezoelectric properties; Experimental study; Fabrication property relation; Switching; Oxide ceramics; Piezoelectric ceramics; Lead zirconates; Compressive stress; Lead Titanates Zirconates; Hysteresis; Electroceramics
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/j.jeurceramsoc.2004.01.016

This paper deals with the influence of preload stress on the ferroelectric hysteretic behavior of piezoelectric ceramics. The polarization and strain versus electric field hysteresis loops were measured for soft lead zirconate titanate (PZT) piezoceramic material under various uniaxial compressive stress preloads of up to −400
MPa. The investigation revealed that the superimposed compression load reduced the remnant polarization, decreased the coercive field, and also had a significant impact on the dielectric and piezoelectric properties. With increasing mechanical load, dielectric hysteresis and butterfly hysteresis became less and less pronounced, as the compressive stress prevented full alignment of the domains and induced mechanical depolarization. The slopes of the polarization and strain curves at zero electric field were measured to evaluate the dependence of permittivity and piezoelectric coefficients on the prestress. The experimental results were interpreted in terms of the non-180° domain switching process under combined electromechanical loading.