Domain orientations and piezoelectric properties in novel 2–2-type composites with two single-crystal components. (26th April 2019)

• Record Type: Journal Article
• Authors: Topolov, V. Yu.; Krivoruchko, A. V.; Bowen, C. R.; Panich, A. A.
• Is Part Of: Ferroelectrics. Volume 543(2019)
• Page Start: 115
• Page End: 129
• Publication Date: 2019-04-26
• Subjects: Piezo-active composite -- relaxor ferroelectric -- piezoelectric properties -- orientation effect -- hydrostatic parameters -- anisotropy factors; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2019.1592424
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: The present paper is concerned with the piezoelectric properties and related parameters of the 2–2-type parallel-connected composites wherein rotations of the main crystallographic axes in ferroelectric single crystal components are analyzed. The composite consists of layers of two types that are regularly arranged along the non-polar axis. The Type I layer is a single domain 0.63Pb(Mg1/3 Nb2/3 )O3 –0.37PbTiO3 single crystal (either tetragonal in Composite I or orthorhombic in Composite II). The Type II layer is a Li2 B4 O7 single crystal/polyethylene medium with 0–3 connectivity. The composite as a whole is characterized by 2–0–2 connectivity. The following parameters of the composite are studied by taking into account the polarization orientation effect in the Type I layer and the microgeometry of the composite in the Type II layer: piezoelectric coefficients d 3 j * and g 3 j *, their hydrostatic analogs d h * and g h * ; hydrostatic squared figure of merit d h * g h * ; piezoelectric anisotropy factors d 33 * / d 32 * and d 33 * / d 32 * . It is shown that large values of the studied piezoelectric coefficients, hydrostatic parameters and anisotropy factors make Composite II more preferable in comparison to Composite I for hydroacoustic, piezoelectric sensor and energy-harvesting applications.