Structure and dielectric properties of a new series of pyrochlores in the Ca-Sm-Ti-M-O (M = Nb and Ta) system

dc.contributor.author	Sameera, S
dc.contributor.author	Prabhakar Rao, P
dc.contributor.author	Chandran, M R
dc.date.accessioned	2013-11-21T11:40:22Z
dc.date.available	2013-11-21T11:40:22Z
dc.date.issued	2011
dc.identifier.citation	Journal of Materials Science - Materials In Electronics 22(11):1631-1636;Nov 2011	en_US
dc.identifier.issn	0957-4522
dc.identifier.uri	http://ir.niist.res.in:8080/jspui/handle/123456789/806
dc.description.abstract	The present work investigates the dielectric properties of pyrochlore type oxides, Ca-Sm-Ti-M-O (M = Nb and Ta) in the low frequency region (100 Hz-1 MHz) over the temperature range 30-100 A degrees C. The 1 MHz dielectric constants (K) of these oxides are in the range 23-108 and show low variation with frequency (1 kHz-1 MHz). The temperature coefficient of dielectric constant (TCK) over the temperature range varies from positive to negative values in the range 48 to -107 ppm/A degrees C. Rietveld analysis of the X-ray diffraction data establishes a cubic pyrochlore-type phase in the space group Fd3 m (no. 227).The grain morphology observation by scanning electron microscope shows well sintered grains.	en_US
dc.language.iso	en	en_US
dc.publisher	Springer	en_US
dc.subject	Ceramics	en_US
dc.subject	Low-temperature coefficient	en_US
dc.title	Structure and dielectric properties of a new series of pyrochlores in the Ca-Sm-Ti-M-O (M = Nb and Ta) system	en_US
dc.type	Article	en_US