Indexed on: 01 May '06Published on: 01 May '06Published in: Inorganic Materials
We have developed liquid-phase and solid-state processes for the preparation of tetragonal lead tungstate powder with the stoichiometric PbO: WO3 ratio. Solid-state synthesis has been shown to have a number of significant advantages over the liquid-phase process. In addition, a procedure has been developed for processing PbWO4 crystal growth waste through PbWO4 decomposition in nitric acid, which ensures the preparation of extrapure-grade WO3 and PbO. The WO3 and PbO thus obtained have been used in solid-state synthesis of PbWO4, from which high-quality crystals have been grown.