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Recent advances in the study of phase separation in sodium-borosilicate glasses

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Abstract:

Phase separating property, which is a nature of multi-component glass, has been one of the important topics in glass science and technology. Among all the compositions of glass showing phase separating tendency, sodium-borosilicate has attracted greatest interest. Despite the number of studies, understanding on the mechanism for the phase separation from the level of nm scale still remains unsatisfactory. Recently, high resolution solid-state NMR and Raman spectroscopy are shedding new light on the distribution of each ions in borate and silicate phases as well as original structural units in nm level. First half part of this talk, a review on recent results on this topic will be given.
The latter half of this talk, new emerging applications of phase-separating glass will be presented. In this talk, I would like to focus on applications of porous glass produced through the spinodal phase separation of sodium borosilicate glass. A few examples (membrane for fuel cells, heavy metal extraction from glass, a new host for phosphors) developed by the researchers in our institute will be presented. In particular, our recent result on new transparent phosphors will be presented in detail.

Speaker

Dr. Tomoko Akai

Group Leader, Advanced Glass Group,

Institute of Innovative Sustainable Chemistry

National Institute of Advanced Industrial Science and Technology (AIST),

Japan.

 

Time:         July 6, 2006

Address: Room607 in No.2 Building

 
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