Improved dielectric properties in pyrochlore type oxides: Ca3Sm3−xBixTi7Nb2O26.5 (x = 1.0, 2.0 or 3.0) by Bi substitution

Prabhakar Rao, P; Ravindran Nair, K; Divya, P; Peter Koshy; Vaidyan, V K

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dc.contributor.author	Prabhakar Rao, P
dc.contributor.author	Ravindran Nair, K
dc.contributor.author	Divya, P
dc.contributor.author	Peter Koshy
dc.contributor.author	Vaidyan, V K
dc.date.accessioned	2015-01-08T09:08:27Z
dc.date.available	2015-01-08T09:08:27Z
dc.date.issued	2005
dc.identifier.citation	Journal of Materials Science - Materials in Electronics 16(10):663-666;Oct 2005	en_US
dc.identifier.issn	0957-4522
dc.identifier.uri	http://ir.niist.res.in:8080/jspui/handle/123456789/1741
dc.description.abstract	Improved dielectric properties are observed in pyrochlore type oxides, Ca3Sm3-x BixTi7Nb2O26.5 (x = 1.0, 2.0 or 3.0) by Bi substitution. The dielectric constant increased with increasing Bi concentration. The dielectric constant obtained for Ca3Bi3Ti7Nb2O26.5 is 110, whereas, without Bi (Ca3Sm3Ti7Nb2O26.5) it is 62 at 100 kHz. The Powder X-ray diffraction analysis reveals that cubic pyrochlore type phase is formed for all the compositions. The experimental results further show that the formation of Bi substituted compounds is complete at a lower temperature than the compounds without Bi. Microstructure studies reveal that the grains formed are acicular when Bi is present in large amounts compared to cuboid grains in samples having no Bi.	en_US
dc.language.iso	en	en_US
dc.publisher	Springer	en_US
dc.subject	Ferroelectric ceramics	en_US
dc.subject	Pyrochlore type oxides	en_US
dc.title	Improved dielectric properties in pyrochlore type oxides: Ca3Sm3−xBixTi7Nb2O26.5 (x = 1.0, 2.0 or 3.0) by Bi substitution	en_US
dc.type	Article	en_US