Molten salt synthesis of complex perovskite-related dielectric oxides

Thirumal, M. ; Jain, P. ; Ganguli, A. K. (2001) Molten salt synthesis of complex perovskite-related dielectric oxides Materials Chemistry and Physics, 70 (1). pp. 7-11. ISSN 0254-0584

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Perovskite related dielectric oxides of the formula Ba(Zn1/3Nb⅔)O3, Ba(Mg1/3Nb⅔)O3 and Ba(Zn1/3Ta⅔) O3 have been synthesized by the NaCl-KCl molten salt (flux) method at low temperatures of 900°C for 3 or 6 h. Sintering at 1000°C retained the cubic structure. Sintering at 1300°C generated minor amount (~10%) of Ba5Nb4O15 in addition to the main cubic phase for the niobium compounds. The tantalum compounds, on the other hand, decomposed to Ba0.5TaO3, retaining a minor amount of the original cubic phase. Scanning electron micrographs show large grain size (upto 10 μm) in some of the samples obtained by the molten salt method.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Molten Salt; Niobates; Tantalates; X-ray Diffraction (XRD); Scanning Electron Microscopy (SEM)
ID Code:61943
Deposited On:16 Sep 2011 03:46
Last Modified:16 Sep 2011 03:46

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