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Ba3ZnTa2-xNbxO9 and Ba3MgT2-xNbxO9: synthesis, structural and dielectric studies

Thirumal, M and Murugan, Senthil G and Varma, KBR and Ganguli, AK (2000) Ba3ZnTa2-xNbxO9 and Ba3MgT2-xNbxO9: synthesis, structural and dielectric studies. In: Materials Research Bulletin, 35 (14-15). pp. 2423-2430.

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Official URL: http://dx.doi.org/10.1016/S0025-5408(00)00438-4

Abstract

Oxides of the families Ba3ZnTa2-xNbxO9 and Ba3MgTa2-xNbxO9 were obtained by the solid state reaction route at 1573 K and were found to crystallize in the disordered (cubic) perovskite structure. In Ba3ZnTa2-xNbXO9 and Ba3MgTa2-xNbxO9 the entire range (0 less than or equal to x less than or equal to 1) of solid solutions could be synthesized. The dielectric constant decreases with increase in frequency for all compositions in the range 40 Hz to 100 kHz (epsilon (r) varies from 16 to 22). The dielectric loss (D) shows a broad maximum for both Ba3ZnTa2-xNbxO9 and Ba3MgTa2-xNbxO9. The maxima is centered around 2 kHz in the former and near 10 kHz in the latter. (C) 2001 Elsevier Science Ltd. All sights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: A.Oxides;B.Chemical synthesis;C.X-ray diffraction;D. Dielectric properties
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 24 Aug 2010 05:00
Last Modified: 19 Sep 2010 06:14
URI: http://eprints.iisc.ernet.in/id/eprint/31406

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