ملخص: Various compositions of xPbZrO3---yPbTiO3---zPb(Fe1/5, Ni1/5, Sb3/5)O3 piezoelectric ceramics, having a Zr/Ti ratio between 45.1/49.9 and 51.1/43.9, were prepared using the usual ceramics technique, in the temperature range 850-1200 [deg]C. The electromechanical coupling factor (kp), piezoelectric constant (dij) and Young's modulus (Y) are measured as a function of the Zr/Ti ratio. The obtained results are discussed on the basis of the effects of varying the Zr/Ti ratio. The effects of sintering temperature on microstructure are studied by means of a scanning electron microscope (SEM). Grain growth is enhanced by increasing temperature. X-ray diffraction demonstrated the co-existence of both tetragonal and rhombohedral phases. The lattice parameter measurements showed that tetragonal and rhombohedral unit cells of the two phases depend on the sintering temperature.

لغة: إنجليزية