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PbZrO powders have been prepared by an alkoxide-based sol–gel route, starting from lead acetate, zirconium -butoxide, and -butanol as a solvent, and hydrolysed with different amounts of water in neutral and alkaline medium. The local environment of Zr and Pb atoms was pursued from the sol to the dried (150 °C) and heated (400 °C) powders, by extended x-ray absorption fine structure (EXAFS). The analysis of the sol revealed links between Pb and Zr, and even more links between Zr and Zr. The metal neighbourhoods in the dried powders are not influenced by the hydrolysis conditions. Pb-Zr correlations are gradually lost from the sol to the dried and heated powders, while the loss of Zr–Zr correlations is considerably lower.

Structural evolution from the sol to the PbZrO3 precursor powders prepared by an alkoxide-based sol–gel route