Thermal conductivity and the isotope effect in Li 2O

H. Lu, S.T. Murphy, M.J.D. Rushton, D.C. Parfitt, R.W. Grimes

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)


    The thermal conductivity of condensed matter can be reduced through the introduction of isotopic disorder as the different isotopes act as mass defects that scatter phonons responsible for the transfer of heat energy. Here we investigate, using classical molecular dynamic simulations, the magnitude of this effect in the ceramic oxide Li 2O, which will be artificially enriched with 6Li to improve tritium breeding potential in a future fusion reactor. The results show that while the isotope effect will be important at lower temperatures it has little influence at the expected operating temperatures of the breeder blanket.
    Original languageEnglish
    Pages (from-to)1834-1838
    Number of pages5
    JournalFusion Engineering and Design
    Issue number11
    Publication statusPublished - 2012

    Bibliographical note

    Cited By :4

    Export Date: 10 July 2018


    Correspondence Address: Murphy, S.T.; Department of Materials, Imperial College London, London, SW7 2AZ, United Kingdom; email:


    • Breeder blanket
    • Fusion
    • Molecular dynamics
    • Phonon
    • Breeder blankets
    • Ceramic oxides
    • Classical molecular dynamics
    • Condensed matter
    • Heat energy
    • Isotope effect
    • Isotopic disorder
    • Mass defect
    • Operating temperature
    • Tritium breeding
    • Breeder reactors
    • Breeding blankets
    • Carrier mobility
    • Computer simulation
    • Fusion reactions
    • Fusion reactors
    • Isotopes
    • Phonons
    • Thermal conductivity


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