Synthesis and electrical properties of mixed-layer Aurivillius phasesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Polycrystalline samples of the mixed-layer Aurivillius phases Bi10Ti3W3O30, Bi7Ti4NbO21, Bi7Ti4TaO21, SrBi6Ti3Nb2O21, BaBi6Ti3Nb2O21, SrBi8Ti7O27, and BaBi8Ti7O27 (ferroelectrics with high oxygen-ion conductivity) have been prepared by solid-state reactions, and their electrical properties have been studied. All of the compounds undergo a second-order ferroelectric phase transition at temperatures from 500 to 800 degrees C and have high electrical conductivity. Of particular interest is the compound Bi10Ti3W3O30, whose conductivity exceeds that of the other mixed-layer Aurivillius phases by more than one order of magnitude and reaches 5 x 10(-2) S/cm at 800 degrees C.