Doped Pb(Zr,Sn,Ti)O-3 Slim-Loop Ferroelectric Ceramics For High-Power Pulse Capacitors Application

Slim-loop ferroelectric ceramics of Pb(ZrSn,Ti)O-3 were prepared by partial replacing Pb with Ba and La, and replacing Zr, Sn, and Ti with Nb. The saturation polarization (P,) and remnant polarization (P-r) were measured to be 20.66 mu C/cm(2) and 0.55 mu C/cm(2), respectively. A relative permittivity epsilon approximate to 2840 can be reached in these ferroelectric ceramics at room temperature and frequency of 1kHz. The discharge energy density (w) increases in a nearly linearity with the voltage. A discharge energy density of about 0.410J/cm(3) can be obtained at the electrical field of 6000 V/mm. Pulse charge-discharge measurements were conducted and the releasing charges Q retained 80% after 1000 cycles. These ferroelectric ceramics have potential for pulse power capacitor applications.