低密度PZT-95/5陶瓷流体静压相变实验研究

PHASE TRANSFORMATION ON PZT-95/5 CERAMICS WITH LOW DENSITY UNDER HYDROSTATIC PRESSURE

采用常规的氧化物陶瓷生产工艺与多孔化技术相结合的方法 ,制作出不同密度的PZT 95 /5陶瓷样品 ,进行了流体静压相变实验。研究发现 ,陶瓷材料的铁电—反铁电相变与陶瓷中气孔的存在有密切的关系 ,运用气孔塌陷假设或者边缘剪切假设可以对此现象进行定性解释 ,研究结果与美国圣地亚实验室的相似研究结果一致。

The phase transformation of PZT-95/5 ceramics with low density under hydrostatic pressure were investigated experimentally.Experimental results show that ferroelectric to antiferroelectric phase transformation is closely related to pores in ceramics.Pore-collapse theory or Lateral-shear-stress hypothesis gives a qualitative illustration for the results.All the experimental results correspond to those given previously.