Structure, microstructure, and microwave dielectric properties of (Sr2-xCax)(MgTe)O-6 double perovskites

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Title:	Structure, microstructure, and microwave dielectric properties of (Sr2-xCax)(MgTe)O-6 double perovskites
Authors:	Ubic, R Letourneau, S Sherin Thomas Subodh, G Sebastian, M T
Keywords:	Temperature-coefficient Complex perovskites Tolerance factor Cation
Issue Date:	2010
Publisher:	American Chemical Society
Citation:	Chemistry of Materials 22(16):4572-4578;24 Aug 2010
Abstract:	Sr2-xCaxMgTeO6 (0 <= x <= 2) ceramics were prepared by the solid-state ceramic route. Structure and microstructure of the compounds were investigated using XRD, TEM, and SEM methods. The system undergoes a transition from pseudocubic tetragonal 14/m symmetry for x = 0 (Sr2MgTeO6) to pseudotetragonal monoclinic P2(1)/n symmetry for x > 0. The dielectric properties of the ceramics were studied by the resonance method. The temperature coefficient of resonant frequency is negative throughout the series; permittivities were in the range 13.2-14.3, and quality factors varied from 27 500 to 81 000 (5-6 GHz).
URI:	http://ir.niist.res.in:8080/jspui/handle/123456789/1206
ISSN:	0897-4756
Appears in Collections:	2010

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