Influence of Properties of Bi2(Zn1/3Nb2/3)2O7 Ceramics Doped with Na-Ni

doi:10.3724/SP.J.1077.2010.00825

Abstract

Abstract:

Bi₂(Zn_1/3Nb_2/3)₂O₇ based ceramics were prepared by a traditional solid phase reaction method. The effects of substitution Na⁺ for Bi³⁺ and Ni²⁺ for Nb³⁺ on the sintering and dielectric properties of Bi₂(Zn_1/3Nb_2/3)₂O₇ based ceramics were investigated. The sintering temperature of the substituted samples dropped to 870℃ from 960℃. At -30℃-+130℃, the dielectric relaxation peak with a broad temperature region is obviously observed and two relaxation peaks appear when the substitution of Ni²⁺ reaches 0.2. Then, with the increasing of substitution, the temperature of the permittivity maximum shifts to higher temperature and the activation energy involved in the relaxation processes increases and the distance between two relaxation peaks become longer. Defect dipole and distortion of crystal lattice theories are used to explain the dielectric relaxation of Na-Ni doped Bi₂(Zn_1/3Nb_2/3)₂O₇ ceramics.

Key words: Bi₂(Zn_1/3Nb_2/3)₂O₇ based ceramic, dielectric relaxation, ion substitution, distortion of crystal lattice, defect dipole

CLC Number:

TB303

LI Zai-Ying, DING Shi-Hua, SONG Tian-Xiu. Influence of Properties of Bi₂(Zn_1/3Nb_2/3)₂O₇ Ceramics Doped with Na-Ni[J]. Journal of Inorganic Materials, 2010, 25(8): 825-828.

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Influence of Properties of Bi₂(Zn_1/3Nb_2/3)₂O₇ Ceramics Doped with Na-Ni

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