Some barium titanate based dielectrics

Varaprasad, A. M. ; Chakrabarty, D. K. ; Biswas, A. B. (1981) Some barium titanate based dielectrics Bulletin of Materials Science, 3 (1). pp. 1-8. ISSN 0250-4707

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Some new potential dielectric materials have been made through the cross-substitution of Ba2+ by a 1:1 molar combinations of tri-(La3+) and mono-valent (Li+, Na+, K+) ions at the Ba2+ site in BaTiO3. Chemical analysis shows that compositions in the potassium series are about 6·1% deficient in their K2O content and exhibit interesting dielectric relaxations. The cross-substitution has lowered theT c down to room temperature. The disorder in the larger 'A' cation sublattice of the three systems has been established by infra-red and x-ray data. This leads to microscopic compositional variations, which in turn can account for the diffuseness of the dielectric anomalies observed in the barium titanate-rich compositions (0≤x≤0·3).

Item Type:Article
Source:Copyright of this article belongs to Indian Academy of Sciences.
Keywords:Dielectrics; Ceramics; Phase Transformation; Barium Titanate
ID Code:81147
Deposited On:04 Feb 2012 07:48
Last Modified:18 May 2016 22:49

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