Microwave dielectric properties of alkaline earth orthosilicates M2SiO4 (M=Ba, Sr, Ca)

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Title:	Microwave dielectric properties of alkaline earth orthosilicates M2SiO4 (M=Ba, Sr, Ca)
Authors:	Tony Joseph Sebastian, M T
Keywords:	Electronic materials X-ray techniques Microstructure Sintering
Issue Date:	2011
Publisher:	Elsevier
Citation:	Materials Letters 65(5):891-893;15 Mar 2011
Abstract:	Alkaline earth orthosilicates M2SiO4 (Sr, Ca) ceramics were prepared by solid state ceramic route and their microwave dielectric properties were investigated. M2SiO4 ceramics have epsilon(r) in the range 8.5-13. At microwave frequencies, the Q (u) x f obtained were 17,900 GHz, 19,100 GHz and 26,100 GHz for Ba2SiO4, Sr2SiO4 and Ca2SiO4 respectively. The T-f of Ba2SiO4 was - 17 ppm/degrees C, whereas Sr2SiO4 and Ca2SiO4 exhibited high values of T-f, - 205 ppm/degrees C and - 89 ppm/degrees C respectively. The coefficient of thermal expansion (alpha (1)) of the orthosilicates was also studied.
URI:	http://ir.niist.res.in:8080/jspui/handle/123456789/1082
ISSN:	0167-577X
Appears in Collections:	2011

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