Papers by Keyword: PZT 95/5 Ferroelectric Ceramic

Abstract: The effect of WO₃ additions on the sintering ability and electrical properties of Pb(Zr_0.95Ti_0.05)O₃ ferroelectric ceramics (PZT 95/5) was investigated. Pure and W-doped PZT 95/5 ceramics were prepared by the usual ceramic technique from raw oxides. The bulk density, microstructure, electrical properties of ceramics as a function of WO₃ content were characterized. The results showed that the WO₃ addition was benefit for the sintering densification of PZT, and the ceramics with 2.0 mol% WO₃ addition exhibited the maximum value for the density (7.8 g/cm³) at a sintering temperature of 1250 °C. Moreover, piezoelectric constant (d₃₃), relative dielectric constant (ε_r), dielectric loss (tanδ) and ferroelectric hysteresis loop of PZT 95/5 ceramics at the sintering temperature of 1250 °C all altered regularly with the change of WO₃ doping level, whose optimum values were all obtained by doping 2.0 mol% WO₃. The best values obtained for these parameters were: d₃₃ = 65 pC/N, ε_r = 314, tanδ = 0.028, P_r = 24.80 µC/cm² and E_c = 1890 V/mm, respectively. These results show that tungsten doped Pb(Zr_0.95Ti_0.05)O₃ ferroelectric ceramics can be hopefully used for the pulsed power devices.

Abstract: In the frame of shock-induced depoling, PZT 95/5 ferroelectric ceramics with niobium doped has been assembled for the pulsed power supply, and the electrical current output has been investigated under the action of shock wave in a "normal mode". The electrical response of LRC load especially for the small resistance (R) and small inductance (L) load was studied. Plane-shock-wave tests were conducted, and the PZT 95/5 ceramics stacked in parallel were devised to generate high-power electrical pulse. An output current of 7 kA has been obtained, and the corresponding rise time of the front edge is under 500 ns. Theoretical calculations were conducted and a good agreement with the experiment presented.