Microwave dielectric properties of Co2La4Ti3Si4O22 ceramics

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Title:	Microwave dielectric properties of Co2La4Ti3Si4O22 ceramics
Authors:	Chameswary, J Sherin Thomas Sebastian, M T
Keywords:	Complex permittivity Forsterite ceramics Perrierite
Issue Date:	2010
Publisher:	Wiley
Citation:	Journal of the American Ceramic Society 93(7):1863-1865;Jul 2010
Abstract:	Co2La4Ti3Si4O22 ceramic was synthesized by the conventional solid-state ceramic route. The structure and microstructure of the sintered ceramics were characterized by X-ray diffraction (XRD) and scanning electron microscopic techniques. XRD study showed the presence of SiO2 as a secondary phase. Attempts were made to obtain phase-pure material by preparing nonstoichiometric Co2La4Ti3Si(4-x)O(22-delta) (where x=0.02, 0.05, 0.1, 0.25, and 0.5) ceramics. The secondary phase of SiO2 could be effectively suppressed for x=0.1 with good microwave dielectric properties. The Co2La4Ti3Si3.9O(22-delta) has epsilon(r)=17.4, Q(u) x f=48 700 GHz, and tau(f)=-155 ppm/degrees C
URI:	http://ir.niist.res.in:8080/jspui/handle/123456789/1129
ISSN:	0002-7820
Appears in Collections:	2010

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