摘要
利用电子显微镜比较研究了SrBi_2Ta_2O_9(SBT),Bi_3TiTaO_9(BTT),Bi_4Ti_3O_12(BTO),Bi_3.25La_0.75Ti_4O_12(BLT),SrBi_4Ti_4O_15-Bi_4Ti_3O_12(SBTi-BT)和SrBi_4Ti_4O_15-Bi_3.25La_0.75Ti_3O_12(SBTi-BLT)各自的畴结构和形态,并讨论了可能的相关机制.研究结果发现:90°畴的形态和密度各不相同,均受材料本征的内应力影响;90°畴界密度较高的材料对应的疲劳性也较好.
The domain structures of SBT and BTT, BTO and BLT, SBTi-BT and SBTi-BLT were studied by transmission electron microscope. 90°domain walls and anti - phase boundaries are found. High density and curved 90°domain walls are observed in SBT, BLT and SBTi - BLT which had fatigue free properties. On the other hand, faceted and low density 90°domain walls are found in fatigue failure materials : BTT, BTO and SBTi - BT. The possible mechanism is discussed.
出处
《哈尔滨理工大学学报》
CAS
2002年第6期27-28,31,共3页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金资助(19904005
90207027)
