Ferroelectric Properties of Bi3.25Gd0.75Ti2.97V0.03O12

Abstract:

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Bi3.25Gd0.75Ti2.97V0.03O12 (BGTV)ceramic were prepared by solid state reaction. These samples had polycrystalline Bi-layered perovskite structure without preferred orientation, and consisted of well developed plate-like grains with random orientation. BGTV caused a large shift of the Curie temperature ( TC ) of Bi4Ti3O12 (BIT) from 675°C to 398°C. The remanent polarization and the coercive field of the BGTV were 30μC/cm2 and 52kV/cm at an electric field of 87kV/cm, respectively. Furthermore, the dielectric permittivity and dissipation factor were 300 and 0.003 at 1MHz, at 1V and at room temperature, respectively. These ferroelectric properties of BGTV are superior to V-doped Bi4Ti3O12 (~20μC/cm2 and 80kV/cm) and (Sr, Ta)-doped Bi4Ti3O12 (~12μC/cm2 and 71kV/cm) ceramics. In addition, the dense ceramics of BGTV could be obtained by sintering at temperatures 100─200°C lower than those of the SrBi2Ta2O9 system.

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Edited by:

Yiwang Bao, Danyu Jiang, Li Tian and Jianghong Gong

Pages:

214-217

DOI:

10.4028/www.scientific.net/KEM.492.214

Citation:

C. Q. Huang et al., "Ferroelectric Properties of Bi3.25Gd0.75Ti2.97V0.03O12", Key Engineering Materials, Vol. 492, pp. 214-217, 2012

Online since:

September 2011

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$35.00

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