Combustion synthesis and properties of fine-particle fluorescent aluminous oxides

Kingsley, JJ and Manickam, N and Patil, KC (1990) Combustion synthesis and properties of fine-particle fluorescent aluminous oxides. In: Bulletin of Materials Science, 13 (3). pp. 179-189.

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Abstract

Fine-particle fluorescent Al oxide materials like $Cr3^{+-}$doped $\alpha-Al_2O_3$ (ruby), $MgAl_2O_4 LaAlO_3, Y_3A_{l5}O_{12},$ and $Ce3^{+-}$doped $Y_3A_{l5}O_{12}$, $LaMgAl_{11}O_{19}, CaAl_{12}O_{19}$, and CeMg$Al_{11}O_{19}$ were prepd. by the combustion of the corresponding metal nitrate-Al nitrate-urea/carbohydrazide mixts. at 500° in <5 min. Formation of these $Cr3^{+-}$ and $Ce3^{+-}$doped Al oxides was confirmed by their characteristic x-ray diffraction, color, UV-visible and fluorescence spectra, and decay-time measurements. Ruby $(Cr^{3+-}\alpha-Al_2O_3)$ powder showed characteristic excitation bands at 406 and 548 nm and emission band at 695 nm with the decay time of 3.6 ms.

Item Type:	Journal Article
Publication:	Bulletin of Materials Science
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright of this article belongs to Indian Academy of Sciences
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	30 Jan 2008
Last Modified:	19 Sep 2010 04:41
URI:	http://eprints.iisc.ac.in/id/eprint/12627

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