冲击波加载下PZT95／5铁电陶瓷的电阻率研究

Resistivity of PZT 95/5 ferroelectric ceramic under shock wave compression

利用炸药爆炸产生的平面冲击波,研究了垂直模式冲击波加载下PbZr0.95Ti0.05O3(PZT95/5)铁电陶瓷冲击波压缩区域的电阻率变化.在建立的模型中考虑了冲击波压缩区域的有限电阻率,计算结果表明:在压力约2.0GPa,负载短路的条件下,PZT95/5铁电陶瓷冲击波压缩区域的电阻率从初始107—1011Ωcm迅速降到最小值约40Ωcm,然后基本保持在120—140Ωcm之间.

Resistivity of the shocked PbZr0.95 Ti0.05 O3 （ PZT 95/5 ） ferroelectric ceramic has been determined under shock wave compression. A physical model has been developed which takes into account the finite resistivity of ferroelectric ceramic compressed by shock wave propagating in a direction perpendicular to the remanent polarization vector. The results reveal that under the pressure of about 2.0 GPa under short circuit, the resistivity of the shocked PZT 95/5 ceramic drops very quickly from 10^7-10^11Ωcm to a minimum of 40Ωcm and then rises to values between 120 and 140Ωcm until the end of the shock depoling.