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The piezo-active 3–0-type composite that contains the ferroelectric ceramic of the PZT type (main piezoelectric component) and corundum ceramic as a component with a large elastic stiffness is first studied within a range of small volume fractions [Formula: see text] of the corundum component. In the composite samples, almost equal volume fractions of corundum [Formula: see text] and air pores [Formula: see text]are detected at [Formula: see text], and this has no analogies among the studied 3–0-type composites. Results on the piezoelectric response, anisotropy of the piezoelectric coefficients [Formula: see text] and electromechanical coupling factors [Formula: see text]/[Formula: see text] are interpreted within the framework of models put forward, and agreement between the evaluated and experimental parameters at [Formula: see text] is observed. The studied composite can be suitable for transducer, ultrasonic and other applications.

A 3-0-type composite, that contains the PZT-type ferroelectric and corundum ceramics, is characterised as a piezoelectric material with relatively stable resonance frequencies for the planar and thickness modes of oscillation. The 3-0-type composite is manufactured by solid state sintering, the resulting composite microgeometry is studied by electronic microscopy, and parameters of the composite are measured by using the resonance-antiresonance method. It is observed that almost equal volume fractions of corundum m c and air pores m p are detected in the composite samples at 0.05 < m c < 0.18. The presence of both the corundum inclusions and air pores at an almost equal volume fraction influences the elastic properties and resonance frequencies. Experimental results on the elastic properties and frequency characteristics of the composite are interpreted in terms of a model that takes into account the electromechanical interaction between the 3-0 ferroelectric ceramic/corundum and 3-0 ferroelectric ceramic/pore regions. Effective electromechanical properties and related parameters of the composite are evaluated in terms of the effective field method and dilute approximation. The studied 3-0-type composite has potential to be applied as an active element of piezoelectric transducers, sensors, and other piezotechnical devices.

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