Microwave dielectric properties of La(6)Mg(4)A(2)W(2)O(24) [A = Ta and Nb] ceramics

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Title:	Microwave dielectric properties of La(6)Mg(4)A(2)W(2)O(24) [A = Ta and Nb] ceramics
Authors:	Rajamma, R Sebastian, M T
Keywords:	Homologous Series Resonators
Issue Date:	2007
Publisher:	Wiley
Citation:	Journal of the American Ceramic Society 90(8):2472-2475;Aug 2007
Abstract:	The microwave dielectric properties of two A-site-deficient perovskite-type ceramics in the La(6)Mg(4)A(2)W(2)O(24) [A = Ta and Nb] system were investigated. The compounds were synthesized by the solid-state ceramic route. The structure and microstructure were analyzed using X-ray diffraction and scanning electron microscopy techniques. The dielectric properties were measured in the microwave frequency range [4-6 GHz] by the resonance method. La6Mg4Ta2W2O24 had Q(u) x f=13600 GHz, epsilon(r) = 25.2, and tau(f) = -45 ppm/degrees C and La6Mg4Nb2W2O24 had Q(u) x f = 16 400 GHz, epsilon(r) = 25.8, and tau(f) = -56 ppm/degrees C
URI:	http://ir.niist.res.in:8080/jspui/handle/123456789/1837
ISSN:	0002-7820
Appears in Collections:	2007

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