Study of microstructure and electromechanical properties of ceramic-matrix piezocomposites PZT/α-Al2O3.

The electromechanical properties and microstructural features of ceramic-matrix piezocomposites PZT/α-Al2O3 with different volume fractions of microcrystalline α-Al2O3 filler were studied. The concentration dependences of the complex elastic and electromechanical parameters of piezoelectric elements on α-Al2O3 microcrystals concentration were measured. It was found that, along with the influence of the non-piezoelectric phase α-Al2O3, the microporosity of the piezoceramic matrix appearing during sintering plays a decisive role in the formation of the electro-physical properties of ceramic-matrix piezocomposites PZT/α-Al2O3. [ABSTRACT FROM AUTHOR]