Journal
APPLIED PHYSICS LETTERS
Volume 77, Issue 8, Pages 1155-1157Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1289803
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A grain-size-dependent reduction in the room-temperature thermal conductivity of nanocrystalline yttria-stabilized zirconia is reported for the first time. Films were grown by metal-organic chemical vapor deposition with controlled grain sizes from 10 to 100 nm. For grain sizes smaller than approximately 30 nm, a substantial reduction in thermal conductivity was observed, reaching a value of less than one-third the bulk value at the smallest grain sizes measured. The observed behavior is consistent with expectations based on an estimation of the phonon mean-free path in zirconia. (C) 2000 American Institute of Physics. [S0003-6951(00)05034-8].
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