Patra, Amitava and Kundu, Debtosh and Ganguli, Dibyendu (1997) A study of the structural evolution of the sol-gel derived Sm3+-doped silica glass. Materials Letters, 32 (1). pp. 43-47. ISSN 0167-577X

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Abstract

Sm3+-doped silica gels have been prepared by a sol-gel process using tetraethyl orthosilicate, H2O, HCl and Sm(NO3)(3) . 6H(2)O. The structural evolution and densification behaviour of the gels during thermal treatment have been monitored by physical property measurements, visible-MR, IR and fluorescence spectroscopy. The gels show a continuous densification and strengthening of the silica network with increasing heat-treatment temperatures (60-100 degrees C). The fluorescence intensity ratio of the (4)G(5/2) —> 6H(9/2) to (4)G(5/2) —> H-6(5/2) transition has been used to study the change of Sm3+ environment during gel-glass conversion. Samarium passes through three different environments at different heat-treatment temperatures during gel to glass conversion.

Item Type:	Article
Uncontrolled Keywords:	sol-gel; silica; samarium; fluorescence
Subjects:	Glass
Divisions:	Sol Gel
Depositing User:	Bidhan Chaudhuri
Date Deposited:	19 Jul 2012 07:19
Last Modified:	17 Sep 2015 06:57
URI:	http://cgcri.csircentral.net/id/eprint/1628

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