Synthesis and microstructure of partly-oriented bismuth layer structure ferroelectrics ceramics SrBi4Ti4O15

SrBi4Ti4O15 powder was synthesized by conventional solid state synthesis ( CS) and molten salt synthesis (MSS). MSS method can synthesize plate-like SrBi4Ti4O15 at lower temperature (900 degrees C) than CS method. Plate-like form becomes rnore distinct when the synthesis temperature increases. This would help cause the grain orientation of the ceramics after sintering. The sintered samples of MSS had grain orientation at (0, 0, 10) plane. The degree of (0, 0, 10) grain orientation F was 62.1%. Hot pressing made (0, 0, 10) grain orientation more distinct (F = 85.7%). The microstructures of the sintered samples were detected by SEM. Due to the grain orientation, the density of samples fabricated by MSS was lower than that of prepared by CS.