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Formation of the Perovskite Phase Pb3NiNb2O9

Pb3NiSNb2O9 was synthesized via various methods in order to investigate the mechanisms of perovskite formation. Two relatively simple routes to precursors that give single‐phase perovskite after calcination at 900°C are described: a modified columbite‐method and a synthesis from a freezedried complex salt solution. The results show that the formation of perovskite Pb3NiNb2O9 does not start below 900 °C and that the pyrochlore formation beginning at lower temperatures has be hindered by a thermal shock calcination.