Microstructure study of Bi{sub}4Ti{sub}3O{sub}12- SrBi{sub}4Ti{sub}4O{sub}15 and Bi{sub}3.25La{sub}0.75Ti{sub}3O{sub}12- SrBi{sub}4Ti{sub}4O{sub}15 ceramics

摘要

TEM study is preformed on mixed-layer type Bismuth compounds: Bi{sub}4Ti{sub}3O{sub}12-SrBi{sub}4Ti{sub}4O{sub}15 (BT-SBTi) and Bi{sub}3.25La{sub}0.75Ti{sub}3O{sub}12-SrBi{sub}4Ti{sub}4O{sub}15 (BLT-SBTi) ceramics. Meeting the prediction of space group theory, APBs and 90° domain wail are observed by bright- and dark-field imaging in both materials, Besides, other planer defects are found and confirmed to be stacking faults.