High Energy Storage Density and Temperature Stability of CeO2 Doped Bismuth Sodium Titanate-based Ceramics

In order to prepare high performance dielectric ceramics which can be used in the field of pulse power capacitors,a compact and uniform NBTST based lead-free relaxor ferroelectric ceramics were prepared by the traditional solid-state reaction method. The energy storage density of NBT-ST-1Ce ceramic sample at room temperature was 1. 07 J / cm3,and the energy storage efficiency was more than 80%. In addition,the energy storage efficiency of the ceramics showed a very good temperature stability which was around 95% in the temperature range of 25—150 ℃.Therefore,this kind of dielectric material has exhibited a very good potential in the field of pulse power capacitors applications.

Key words bismuth sodium titanate,dielectric energy storage,temperature stability,relaxor ferroelectric,cerium dioxide

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