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

S. E. Filippov, A. A. Vorontsov, V. Yu. Topolov, O. E. Brill, P. Bisegna & A. E. Panich
Ferroelectrics Letters Section Volume 41, Issue 4-6, 2014 pages 82-88
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 ζd3j = d*33/d*31 is discussed in terms of connectivity patterns at the volume fraction of clay 0.01 ≤ mcl ≤ 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.
Keywords: Piezoelectric composite, piezoelectric coefficients, piezoelectric anisotropy, ferroelectric ceramic, clay
Опубликовано 14.01.2015 19:38