Features of the Piezoelectric Effect in a Novel PZT-Type Ceramic/Clay Composite

• Published in: Ferroelectrics. Letters section Vol. 41; no. 4-6; pp. 82 - 88
• Main Authors: Filippov, S. E., Vorontsov, A. A., Topolov, V. Yu, Brill, O. E., Bisegna, P., Panich, A. E.
• Format: Journal Article
• Language: English
• Published: Philadelphia Taylor & Francis 02.11.2014; Taylor & Francis Ltd
• Subjects: Anisotropy; Ceramics; Clay; Clay (material); Effects; ferroelectric ceramic; Ferroelectric materials; Ferroelectrics; Formations; Mathematical models; piezoelectric anisotropy; piezoelectric coefficients; Piezoelectric composite; Piezoelectricity; Porosity; Thin films
• ISSN: 0731-5171; 1563-5228
• DOI: 10.1080/07315171.2014.950101

Piezoelectric properties, their anisotropy and sound velocity are first studied in the composite based on ferroelectric ZTS-19 ceramic of the PZT type, and the second component of the composite is piezo-passive clay. The composite as a whole is characterised by a specific porosity and elements of various connectivity patterns. The important role of microgeometric factors in the formation of piezoelectric coefficients d* 3j (j = 1 and 3) and their anisotropy ζ d3j = d* 33 /d* 31 is discussed in terms of connectivity patterns at the volume fraction of clay 0.01 ≤ m cl ≤ 0.35. The role of the clay component and clay-containing thin layers in the formation of the piezoelectric activity and sensitivity is interpreted within the framework of models of the two- and three-component composites based on poled ferroelectric ceramics. Results of modelling are compared to experimental data on the studied composite.