Cairo University

MTPR Journal

 

The influence of pH value on sol-gel preparation of PLZT polycrystalline powders


M. Afifi, M.M. Rashad, A.M. Eid, L. Abd El-Latif, S.F. Mansour
1Ultrasonic Laboratory, National Institute for Standards, Tersa Street, P.O. Box 136, El-Haram, Giza 12211, Egypt
2Central Metallurgical Research and Development Institute (CMRDI), P.O. Box 87, Helwan 11421, Cairo, Egypt

Vol./Issue: 14 , id: 115

The piezoelectric Lanthanum Lead zirconate titanate (PLZT) based ceramics with a composition of La0.6Pb0.94 (Zr0.52Ti0.48)O3 were studied using sol-gel auto-compulsion method. The specimens were fabricated and studied to understand the effect of ph7 adjustment on the microstructure, dielectric and the ultrasonic mechanical properties. The material was characterized for DSC/TGA and TEM studies. A polycrystalline single phase of PLZT with tetragonal structure was obtained, for the powder calcined at 600 for 3 h and 850 °C for 3 h. The electrical properties of the prepared ceramics were investigated as a function of the frequency using impedance analyzer. The remnant polarization (Pr) and coercive electric field (Ec) were calculated from the ferroelectric loop by Sawyer-Tower circuit.