Electrical properties of a lead-free perovskite ceramic: (Na0.5Sb0.5)TiO3

Prasad, K and Lily, and Kumari, K and Chandra, P and Yadav, K L and Sen, S (2007) Electrical properties of a lead-free perovskite ceramic: (Na0.5Sb0.5)TiO3. Applied Physics A-Materials Science & Processing, 88 (2). pp. 377-383.

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Polycrystalline (Na0.5Sb0.5)TiO3 was prepared using a high-temperature solid-state reaction method. An XRD analysis indicated the formation of a single-phase monoclinic structure. Complex impedance studies revealed the presence of grain boundary effects from 300 degrees C onwards. Also, the dielectric relaxation in the system was found to be of a non-Debye type. The ac conductivity data were used to evaluate the density of states at the Fermi level, the minimum hopping length and activation energy of the compound. The dc electrical and thermal conductivities of grain and grain boundary have been assessed. The correlated barrier hopping model was found to successfully explain the mechanism of charge transport in (Na0.5Sb0.5)TiO3.

Item Type:Article
Official URL/DOI:DOI: 10.1007/s00339-007-3989-6
Uncontrolled Keywords:diffuse phase-transition; relaxor ferroelectric ceramics; dielectric-properties; ac conductivity; dependence; Na0.5Bi0.5Tio3; permittivity
Divisions:Material Science and Technology
ID Code:3419
Deposited On:18 Jul 2011 12:43
Last Modified:08 Feb 2012 12:06
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