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用透射电镜（ＴＥＭ）和选区电子衍射（ＳＡＥＤ）技术，研究了Ｓｍ 和Ｍｎ 改性钛酸铅压电陶瓷的电畴的结晶学特性。结果表明，改性ＰｂＴｉＯ３ 压电陶瓷中存在大量的电畴界面，畴界面为｛１０１｝，畴界两侧晶体的ｃ轴夹角取决于晶胞参数（ａ 和ｃ），约为８６．４°，而不是９０°。这种电畴的［１００］晶带选区电子衍射图特征为：［０１１］方向衍射斑点开裂，而［０１１－ ］上衍射斑点重合，不开裂，据此可识别９０°畴界和１８０°畴界
The crystallographic properties of the domains of Sm and Mn modified lead titanate piezoelectric ceramics were investigated by transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The results show that there are a large number of electrical domain interfaces in the modified PbTiO3 piezoelectric ceramics. The domain interface is {101}. The c-axis angle of the crystals on both sides depends on the unit cell parameters (a and c), which is about 86.4 ° instead of 90 °. The [100] zone selected area electron diffraction pattern of this domain is characterized by [011] diffraction spot demarcation and [011-] diffraction spot coincidence and no cracking, whereby a 90 ° boundary and a 180 ° domain can be identified Sector