ChemInform Abstract: Preparation, Sintering, and Ferroelectric Properties of Layer-Structured Strontium Bismuth Titanium Oxide Ceramics.
Abstract
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ChemInform Abstract
SrBi4Ti4O15 ceramics are prepared by solid state reaction of SrCO3, Bi2O3, and TiO2. The formation of SrBi4Ti4O15 starts at 700 °C and the pure layered structure is completely formed at 900 °C. The samples are characterized by powder XRD and SEM. The obtained powder is found to be hardly sintered at low temperature. Raising the sintering temperature higher than 1100 °C leads to partial decomposition. In order to suppress the decomposition reaction, a process of covering SrBi4Ti4O15 compacts on the sintered ceramics is developed. This process results in highly densified SrBi4Ti4O15 ceramics having the pure layer-structured phase. These samples exhibit good ferroelectric properties with high remanent polarization and low coercive field.
