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研究了ＰＺＴ－５铁电陶瓷的细观结构及其轴向压缩和四点弯曲试验条件下的力学性能和断口形貌。观察分析表明此铁电材料当自发极化和自发应变时产生的内应力均由晶间和晶内微裂纹释放，自发极化和自发应变初始边界条件可满足，故轴向压缩和四点弯拉伸的破坏只与畴变时引起的新增微裂纹和初始微裂纹的扩展有关。
The microstructure of PZT-5 ferroelectric ceramics and the mechanical properties and fracture morphology under axial compression and four-point bending test were studied. The observation and analysis show that the intrinsic stress generated by spontaneous polarization and spontaneous strain of the ferroelectric material are both released by intergranular and intracrystalline micro-cracks. The initial boundary conditions of spontaneous polarization and spontaneous strain can be satisfied. Therefore, axial compression and four-point bending Tensile damage is only related to the increase of new microcracks and initial microcracks caused by domain change.