Under Shock Loading Of Pzt 95/5 Ceramics The Fe ¡ú The Afe Phase Transition Pressure Experimental Study

Shock-induced depoling of the ferroelectric ceramic PZT-95/5 is utilized in a number of pulsed power devices. In this paper, basing on a principle that two-wave can be detected when structure phase transition occurs, we measured the phase transformation pressure from the ferroelectric phase to the antiferroelectric phase of national PZT-95/5 ceramic under shock loading . Some plane-wave tests have been conducted on axially poled PZT-95/5 at stress levels ranging from 0.3 to 1.6GPa, by Quartz gauge and VISAR diagnostics. Finally, the two-wave structure of the phase transition from FE-AFE of PZT-95/5 was measured, and the range of the phase transition pressure has been obtained.According to the experiments and theoretical calculations, the conclusions are briefly summarized as follows:1 .Using explosive and quartz gauge, the two-wave structure of shocked PZT-95/5 have been determined. The results of these experiments indicate that the ferroelectric/antiferroelectric phase transition begins over 0.5GPa and ends at about 1.6GPa. This result is in agreement with that of others very well. 2.Using gas gun and velocity interferometric techniques,the the two-wave structure have also been determined. The results demonstrate a step change in terms of surface velocity from 25m/s to 50m/s.The pressure of this change is about 0.33~0.67GPa, and in a good agreement with that of explosive experiment.3.SEM microscopy provides the evidence of ferroelectric/antiferroelectric transition under shock loading. The microstructure of the l.OGPa shocked sample indicates that the material is in a mixed phase, and the concentration of the FE phase diminishing with increasing stress. The results of SEM consolidate the results obtained in dynamic shock studies.