Effect of sol-gel synthesis on the structural and photoluminescence properties of magnetoplumbite-type strontium ferrite

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Title: Effect of sol-gel synthesis on the structural and photoluminescence properties of magnetoplumbite-type strontium ferrite
Author(s): Teh, Geok Bee; Wong, Yat Choy; Wang, James; Tan, Seng Gee; Samini, Balakrishnan
Abstract: Magnetoplumbite-type (M-type) strontium ferrite particles with two stoichiometric ratios (SrFexO19; x = 9.2 and 11.6) have been synthesized via the sol-gel technique employing ethylene glycol as the gel precursor. The prepared samples were characterized using x-ray diffractometry (XRD), thermogravimetric analysis (TGA), photoluminescence (PL) spectrophotometry, field emission scanning electron microscopy (FESEM), energy dispersive x-ray spectrometry (EDS) and superconductivity quantum interference device magnetometry (SQUID). X-ray powder diffraction patterns showed that the samples were single-phase with the space group of P63/mmc and cell parameter values of a = 5.88 Ǻ and c = 23.03 – 23.04 Ǻ. EDS results confirmed the composition being mainly of M-type SrFe12O19. The photoluminescence property of strontium ferrite was examined at excitation wavelength of 260 - 290 nm and significant PL emission peaks centered at 334 nm were detected. Both as-prepared strontium ferrites exhibited significant oxygen vacancies which were detectable via TGA where the sample with the Sr/Fe ratio of 1:11.6 exhibited the highest oxygen vacancies in its structure.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences
Source: Materials Science Forum: proceedings of the 7th Pacific Rim International Conference on Advanced Materials and Processing (PRICM-7), Cairns, Queensland, Australia, 02-06 August 2010 / Jian-Feng Nie and Allan Morton (eds.), Vol. 654-656 (2010), pp. 1134-1137
Publication year: 2010
FOR Code(s): 0912 Materials Engineering; 1007 Nanotechnology
Keyword(s): Hexagonal ferrite; Magnetoplumbite-type; Photoluminescence; Sol gel; Strontium ferrite
Publisher: Trans Tech Publications
ISSN: 0255-5476
ISBN: 9780878492558, 0878492550
Publisher URL: http://dx.doi.org/10.4028/www.scientific.net/MSF.654-656.1134
Peer reviewed