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【资源】antiferroelectric ceramic capacitor 已有1人参与
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antiferroelectric ceramic capacitor Dielectric properties and energy storage capability of antiferroelectric [/quote]Beihai Ma,a) Do-Kyun Kwon,b) Manoj Narayanan, and U. (Balu) Balachandran Energy Systems Division, Argonne National Laboratory, Argonne, Illinois 60439Antiferroelectric (AFE) Pb0.92La0.08Zr0.95Ti0.05O3 (PLZT) films were grown on nickel foils with lanthanum nickel oxide buffer by chemical solution deposition. We observed field-induced AFE-to-ferroelectric (FE) phase transition. The electric field for the AFEto- FE phase transition (EAF 270 kV/cm) and that for the reverse phase transition (EFA 230 kV/cm) were measured at room temperature on samples with PLZT filmsantiferroelectric ceramic capacitor of 1-mm thickness. Relative permittivity of 560 and dielectric loss of <0.05 were measured near zero DC bias field. Hysteresis loop analysis showed that energy densities of 53 and 37 J/cm3 can be stored and recovered from the film-on-foil capacitors at 25 and 150 C, respectively. Highly accelerated life tests were conducted. The projected mean time to failure is >5000 h when the capacitors are operated at room temperature with an applied field of 300 kV/cm.antiferroelectric ceramic capacitor |
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2楼2010-05-13 21:11:35