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IJPAP Vol.44(01) [January 2006] >

Title: Electrical properties of La-modified strontium bismuth titanate
Authors: Raghavender, M
Kumar, G S
Prasad, G
Keywords: Dielectric properties
Strontium bismuth titanate
Perovskite materials
Issue Date: Jan-2006
Publisher: CSIR
IPC CodeH01G 7/06
Abstract: Bismuth ion in four layered strontium bismuth titanate (SBT), a compound of Aurivillius family, is partially replaced with La3+ in the place of Bi3+ to synthesize SrBi (4-x)LaxTi4O15, with x = 0.25, 0.50, 0.75. The ceramic powders were prepared using chemical route. The temperature dependence of the dielectric and impedance properties was studied over a wide frequency range. The dielectric properties showed interesting changes in the transition temperatures. These changes are correlated with the distortion that sets in the samples due to the incorporation of lanthanum. The octahedra and square pyramidal lattice distortion of the perovskite layers in ABO3 is calculated from lattice parameters. Dielectric transition temperatures are correlated with displacement of A-site ions with respect to octahedral center.
Page(s): 46-51
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.44(01) [January 2006]

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