Abstract
Having pioneered mechanical activation on Pb-based relaxor ferroelectrics, we describe a unique order-disorder transformation phenomenon brought about by mechanical activation in Pb-based relaxor ferroelectrics of complex perovskite. B-site disorder in Pb(Sc1/2Ta1/2)O3 (PST) which is traditionally tailored by thermal annealing after sintering at elevated temperatures, can be triggered by mechanical activation. The B-site disorder in Pb(Sc1/2Ta1/2)O3 triggered by mechanical activation can well be retained in sintered Pb(Sc1/2Ta1/2)O3, leading to an unique ferroelectric transition behavior (e.g., from a normal ferroelectric to relaxor) and a shift in the Curie temperature.
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