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Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/453

Title: Effect of Porosity on Electrical Properties of Undoped and Lanthanum Doped BaTi0.6Zr0.4O3
Authors: Dash, M S
Bera, J
Ghosh, S
Issue Date: 2007
Publisher: IEEE
Citation: International Conference on Solid Dielectrics, Winchester, UK, July 8-13, 2007
Abstract: In porous media, the porosity introduces inhomogeneity in the bulk, which alters the mechanisms of leakage and breakdown exhibited by the dense analog. The presence of pores in solid dielectrics significantly degrades the electrical characteristics and breakdown strength of the material. Lanthanum doped BaTi0.6Zr0.4O3 composition in Ba1-xLaxTi0.6[1- 5x/12]Zr0.4O3 were prepared by modified chemical route. (COOH)2.2H2O, Ba(NO3)2, ZrOCl2.8H2O and La2O3 are used to precipitate barium oxalate hydrate, lanthanum oxalate hydrate and zirconium oxyhydroxide from its water solution onto the surface of suspended TiO2 particles. The lanthanum doped BaTi0.6Zr0.4O3 composition was found to be cubic by XRD analysis. A gradual shift of 2 angles to the higher angle with increasing lanthanum percentage in the BTZ reveals the contraction of perovskite lattice. The frequency dependence of dielectric permittivity and loss tan  of the ceramics has been investigated. It is found that die...
Description: Copyright for this article belongs to IEEE
URI: http://hdl.handle.net/2080/453
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