Microstructure and electrical characterisations of K-modified PLZT

摘要

Potassium-modified PLZT [Pb_(0.92)(La_(1-z)K_(z))_(0.08)(Zr_(0.60)Ti_(0.40))_(0.98+0.04z)O_(3) (z=0.0, 0.1, 0.3, 0.5, 0.7)] ceramics were synthesised using sol-gel technique. Preliminary structural and microstructural parameters were determined using XRD, SEM and TEM techniques. Detailed studies of dielectric properties at 10 kHz in a wide temperature range suggest that the compounds have diffuse phase transition of second order. Studies of spontaneous polarisation, pyroelectric and piezoelectric properties yielded data for devices.