Crystal structure and microwave dielectric properties of LaLuO3 ceramics

dc.contributor.author	Jobin Varghese
dc.contributor.author	Tony Joseph
dc.contributor.author	Sebastian, M T
dc.contributor.author	Reeves-McLaren, N
dc.contributor.author	Feteira, A
dc.date.accessioned	2014-03-28T06:10:00Z
dc.date.available	2014-03-28T06:10:00Z
dc.date.issued	2010
dc.identifier.citation	Journal of the American Ceramic Society 93(10):2960-2963;Oct 2010	en_US
dc.identifier.issn	0002-7820
dc.identifier.uri	http://ir.niist.res.in:8080/jspui/handle/123456789/1242
dc.description.abstract	Dense LaLuO3 ceramics were prepared by the conventional solid-state reaction route. Their room-temperature (RT) crystal structure and microwave (MW) dielectric properties were investigated. Rietveld refinements performed on X-ray diffraction data show the RT crystal symmetry to be best described by the centrosymmetric orthorhombic Pnma space group [a=6.01888 (9) A, b=8.37489 (12) A, and c=5.81841 (8) A, Z=4]. This space group assignment was further corroborated by Raman spectroscopy analysis. At RT and MW frequencies, LaLuO3 ceramics sintered at 1525 degrees C/4 h exhibit a relative permittivity, epsilon(r)=22.4, a quality factor, Q(u) x f=14 400 GHz (at 5.14 GHz), and temperature coefficient of resonant frequency, tau(f)=-7.5 ppm/degrees C. epsilon(r) corrected for porosity was calculated as 23.9.	en_US
dc.language.iso	en	en_US
dc.publisher	Wiley	en_US
dc.subject	LaLuO 3 Ceramics	en_US
dc.title	Crystal structure and microwave dielectric properties of LaLuO3 ceramics	en_US
dc.type	Article	en_US