Shock wave compression of poled Pb_(0.99)[(Zr_(0.90)Sn_(0.10))_(0.96)Ti_(0.04)]_(0.98)Nb_(0.02)O_3 ceramics:Depoling currents in axial and normal modes  

作　　者：JIANG DongDong DU JinMei GU Yan FENG YuJun 

机构地区：[1]National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,China Academy of Engineering Physics,Mianyang 621900,China [2]Electronic Materials Research Laboratory,Xi'an Jiaotong University,Xi'an 710049,China [3]International Center for Dielectric Research,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Chinese Science Bulletin》2012年第20期2554-2561,共8页

基　　金：supported by the Science and Technology Foundation of China Academy of Engineering Physics(2010A0201005);the National Natural Science Foundation of China(10875095and50632030)

摘　　要：We used a 100-mm diameter gas gun to investigate the output currents due to the sudden depolarization of poled Pb 0.99 [(Zr 0.90 Sn 0.10) 0.96 Ti 0.04 ] 0.98 Nb 0.02 O 3 ceramics under shock wave compression.We conducted shock wave experiments for the normal/axial mode with the polarization vector perpendicular/antiparallel to the shock vector.The shock pressure was in the range of 0.23 to 4.50 GPa.We measured the depoling currents under short-circuit,high-impedance,and breakdown conditions.Under the short-circuit condition,the dependence of the released charge on the shock pressure demonstrates the evolution of the ferroelectric-to-antiferroelectric phase transition.The onset pressure of the phase transition is between 0.23 and 0.61 GPa,and phase transition occurs completely above 1.22 GPa.The increasing load resistance decreases the released charge and increases the released energy.The results indicate that Pb[(ZrSn)Ti]NbOceramic is a good candidate for a pulsed power generator.We used a 100-mm diameter gas gun to investigate the output currents due to the sudden depolarization of poled Pb 0.99 [（Zr 0.90 Sn 0.10） 0.96 Ti 0.04 ] 0.98 Nb 0.02 O 3 ceramics under shock wave compression.We conducted shock wave experiments for the normal/axial mode with the polarization vector perpendicular/antiparallel to the shock vector.The shock pressure was in the range of 0.23 to 4.50 GPa.We measured the depoling currents under short-circuit,high-impedance,and breakdown conditions.Under the short-circuit condition,the dependence of the released charge on the shock pressure demonstrates the evolution of the ferroelectric-to-antiferroelectric phase transition.The onset pressure of the phase transition is between 0.23 and 0.61 GPa,and phase transition occurs completely above 1.22 GPa.The increasing load resistance decreases the released charge and increases the released energy.The results indicate that Pb[（ZrSn）Ti]NbOceramic is a good candidate for a pulsed power generator.

关 键 词：冲击波压缩 输出电流 极化波 轴向 陶瓷 正常模 铁电相变 矢量模式 

分 类 号：O521.2[理学—高压高温物理]