Elastic, dielectric, and piezoelectric properties of ceramic lead zirconate titanate/α-Al2O3 composites

Elastic properties and frequency characteristics of a piezo-active 3–0-type corundum-containing composite

“…A piezoelectric performance of the 3-β FC/polymer composites studied in work [2] suggests that these materials can be competitive because of their hydrostatic piezoelectric parameters, piezoelectric sensitivity and anisotropy. In recent decades, various inorganic components such as clay, sand, and cement components have been used [6][7][8][9][10] to improve some effective parameters of the FC-based composites. Examples of the effective piezoelectric and dielectric properties of a ceramic composite that comprises α-Al 2 O 3 (corundum) and the PKR-1 FC based on Pb(Zr, Ti)O 3 are shown in experimental work [10].…”

“…In recent decades, various inorganic components such as clay, sand, and cement components have been used [6][7][8][9][10] to improve some effective parameters of the FC-based composites. Examples of the effective piezoelectric and dielectric properties of a ceramic composite that comprises α-Al 2 O 3 (corundum) and the PKR-1 FC based on Pb(Zr, Ti)O 3 are shown in experimental work [10]. Among the studied effective parameters, we mention piezoelectric coefficients d * 3 j , dielectric permittivity ε *σ 33 of the stress-free sample, and sound velocities at longitudinal and thickness oscillation modes, and these parameters are represented as functions of the volume fraction of α-Al 2 O 3 in the range from 0 to 0.6 [10].…”

“…Examples of the effective piezoelectric and dielectric properties of a ceramic composite that comprises α-Al 2 O 3 (corundum) and the PKR-1 FC based on Pb(Zr, Ti)O 3 are shown in experimental work [10]. Among the studied effective parameters, we mention piezoelectric coefficients d * 3 j , dielectric permittivity ε *σ 33 of the stress-free sample, and sound velocities at longitudinal and thickness oscillation modes, and these parameters are represented as functions of the volume fraction of α-Al 2 O 3 in the range from 0 to 0.6 [10]. Micrographs of the composite from work [10] are related to the volume fractions of α-Al 2 O 3 0.10, 0.18, 0.33, 0.46, and 0.57.…”

“…Among the studied effective parameters, we mention piezoelectric coefficients d * 3 j , dielectric permittivity ε *σ 33 of the stress-free sample, and sound velocities at longitudinal and thickness oscillation modes, and these parameters are represented as functions of the volume fraction of α-Al 2 O 3 in the range from 0 to 0.6 [10]. Micrographs of the composite from work [10] are related to the volume fractions of α-Al 2 O 3 0.10, 0.18, 0.33, 0.46, and 0.57. Of an independent interest is a nonmonotonic volume-fraction dependence of the piezoelectric coefficient d * 33 for volume fractions of α-Al 2 O 3 under 0.20; however, the experimental d * 33 curve in this volume-fraction range is based on three points only and clearly more data in this area is necessary [10].…”

“…Micrographs of the composite from work [10] are related to the volume fractions of α-Al 2 O 3 0.10, 0.18, 0.33, 0.46, and 0.57. Of an independent interest is a nonmonotonic volume-fraction dependence of the piezoelectric coefficient d * 33 for volume fractions of α-Al 2 O 3 under 0.20; however, the experimental d * 33 curve in this volume-fraction range is based on three points only and clearly more data in this area is necessary [10]. In general, the piezoelectric properties, electromechanical coupling, and related parameters of the PZT-type FC/α-Al 2 O 3 composite were also not considered [10] in detail for small volume fractions of α-Al 2 O 3 .…”