PLZT-Synthesis, sintering and ceramics microstructure

摘要

Producing of PLZT powders by original two-stage co-precipitation method from mixed solution of inorganic salts ZrOCl_2-8H_2O, TiCl_4, La(NO_3)_3-6H_2O, Pb(NO_3)_2, was carried out. The sequence of phases formed during PLZT synthesis has been studied by X-ray and DTA analysis. Ceramic samples were prepared by two-stage hot-pressing technology. Dielectric, ferroelectric and optical properties have been measured. Ceramic microstructures were studied by SEM with energy dispersive analytical capability (EDX). The fine-grained microstructure was quite uniform with the average grain size of 5-7 mu xm, without internal or grain boundary porosity. The optical transmittance of ceramic plates (thickness of 0.3 mm) measured at wavelength of 630 nm reached 67-69 percent.