TY - GEN
T1 - Phonons in porous media at intermediate frequencies
AU - Page, J. H.
AU - Hildebrand, W. K.
AU - Beck, J.
AU - Holmes, R.
AU - Bobowski, J.
PY - 2004
Y1 - 2004
N2 - Using ultrasonic techniques, the phonon diffusion coefficient and density of states have been measured at intermediate frequencies in a porous solid network of sintered glass beads. A transition to a very strong scattering regime is observed, whereupon the diffusion coefficient becomes independent of frequency. Near crossover, the density of states is enhanced and exhibits a broad maximum. These data are in good overall agreement with a lattice-based percolation model, and give additional insight into the effects of strong scattering on phonon transport in disorderd media.
AB - Using ultrasonic techniques, the phonon diffusion coefficient and density of states have been measured at intermediate frequencies in a porous solid network of sintered glass beads. A transition to a very strong scattering regime is observed, whereupon the diffusion coefficient becomes independent of frequency. Near crossover, the density of states is enhanced and exhibits a broad maximum. These data are in good overall agreement with a lattice-based percolation model, and give additional insight into the effects of strong scattering on phonon transport in disorderd media.
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U2 - 10.1002/pssc.200405364
DO - 10.1002/pssc.200405364
M3 - Conference contribution
AN - SCOPUS:11044230278
VL - 1
SP - 2925
EP - 2928
BT - Physica Status Solidi C: Conferences
ER -