Debnath, Radhaballabh (1998) Migration behaviour of Co(II) and Fe(III) ions in an alkali-borosilicate glass during thermal phase separation of the system. In: Materials Science and Engineering Serving Society, September 03-05, 1997 , Chiba, Japan .

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Abstract

Migration behaviour of incorporated Co(II) and ubiquitous impurity Fe(III) ions in an alkali-borosilicate glass of vycor type composition has been investigated both before and after the phase separation of the glass as well as in its vycorized silica glass by absorption and EPR studies. The results show that although almost all cobalt ions migrate to the separated alkali berate phase at the time of phase separation, only the interstitial ions in the case of iron can take part in similar migration. The ferric ions in the substitutional silicon sites however, remain unaffected. The absorption and the EPR results of Co(II) suggest that the migration of the ions from the alkali-borosilicate matrix to the alkali-borate phase does not bring about any significant change to its co-ordination structure which is typically a distorted tetrahedron both in the parent and the phase separated glass.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	3rd Okinaga Symposium on Materials Science and Engineering Serving Society, CHIBA, JAPAN, SEP 03-05, 1997 DOI: 10.1016/B978-044482793-7/50043-6; ISBN: 0-444-82793-5
Subjects:	Glass
Divisions:	Glass
Depositing User:	Bidhan Chaudhuri
Date Deposited:	12 Jul 2012 07:25
Last Modified:	12 Jul 2012 07:25
URI:	http://cgcri.csircentral.net/id/eprint/1561

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