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Title: Study on electrical properties of Ni-doped SrTiO3 ceramics using impedance spectroscopy
Authors: Rout, S K
Panigrahi, S
Bera, J
Keywords: Ni doped SrTiO3
impedance spectroscopy
grain boundary
Issue Date: Jun-2005
Publisher: Indian Academy of Sciences
Citation: Bulletin of Material Science, Vol 28, No 3, P 275-279
Abstract: The ceramics, SrTiO3 (ST) and 04, 08 atom% Ni doped SrTiO3, were prepared by solid state re-action route. The average grain size of undoped and doped samples was measured and found to be 12, 19 and 37 µm, respectively. The impedance measurements were conducted at 400–600°C to separate grain and grain boundary contributions. The grain and grain boundaries relaxation frequencies were shifted to higher fre-quency with temperature. Bulk resistance of doped and undoped ST ceramics was more or less the same. Single grain boundary resistance of doped sample was higher than that of undoped one, indicating that GB resis-tance increases with acceptor doping. Activation energies were calculated to confirm the same.
Description: Copyright for this article belongs to Indian Academy of Sciences
Appears in Collections:Journal Articles

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