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USEC Inc. Message Board

  • lewis_whokeyser lewis_whokeyser Feb 9, 2013 8:34 AM Flag

    Note to muffdad

    Thanks for the clarification. I meant Silicon 28.

    Silicon exists in nature as three stable, non-radioactive, isotopes: Si-28 (92 per cent), Si-29 (five per cent) and Si-30 (three per cent). By purification at the sub-atomic level, it is possible to remove essentially all of the Si-29 and Si-30 leaving isotopically pure Si-28, which has a more perfect crystal structure.

    This more perfect crystal structure exhibits reduced phonon-phonon and phonon-electron interactions which increases certain transport properties, such as thermal conductivity. It has been demonstrated in the laboratory that isotopically pure Si-28 has 60 per cent better room temperature thermal conductivity than natural silicon with its three isotopes.

    Improvements in other physical and electrical properties are also theoretically possible. ®

 
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