Novel approach for fabrication of ceramic matrix piezocomposites

Abstract

A novel approach for fabrication of nano- and microporous piezoceramics as well as ceramic matrix piezocomposites (CMCs) were proposed. The technique is based on nanoparticles transport in ceramic matrixes using polymer nanogranules, coated or filled with a various chemicals, as a porosifiers with successive porous ceramics fabrication processes. Resulting CMCs are composed by super lattices of closed pores filled or coated by nanoparticles of metals, oxides, ferromagnetics etc. embedded in piezoceramic matrix. New family of nano- and microporous piezoceramics and CMCs are characterized by a unique spectrum of the electrophysical properties unachievable for standard PZT ceramic compositions and fabrication methods, including giant dielectric relaxation, giant piezoelectric and electrocaloric effects and the possibility of controllable changes of the main properties within a wide range.