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Simultaneous aluminium-26 and oxygen-18 transport in an alumosilicate glass

Simultaneous aluminium-26 and oxygen-18 transport in an alumosilicate glass,10.1016/j.jnoncrysol.2010.05.065,Journal of Non-crystalline Solids,M. Lepk

Simultaneous aluminium-26 and oxygen-18 transport in an alumosilicate glass  
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Simultaneous 26Al and 18O tracer diffusion experiments were performed in an alumosilicate glass (60mol% SiO2, 10mol% CaO, 10mol% Na2O, and 20mol% Al2O3). For the determination of the Al diffusion a novel technique was used, insofar as the isotope 26Al (half-life 7.4×105years) was not used as a radioactive but as a quasi-stable tracer. Combined with a SIMS measurement the tracer concentration profiles could be obtained. At 800°C DAl=2.7×10-21m2/s and DO=3.4×10−19m2/s resulted. This observed difference in mobility is presumably related to the dissimilar roles the constituents Al and O play in the glass structure.
Journal: Journal of Non-crystalline Solids - J NON-CRYST SOLIDS , vol. 356, no. 31, pp. 1604-1606, 2010
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