Ref HAL: hal-00175445_v1
PMID 28192342
DOI: 10.1088/0953-8984/19/41/416110
WoS: 000249987300033
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1 Citation
Résumé:

Brillouin scattering experiments have been performed from 5 to 1600 K in vycor, a porous silica glass. The acoustic velocity and attenuation at hypersonic frequencies are compared to those of bulk silica and others porous silica samples. The experimental evidence for the influence of porosity on the scattering by acoustic waves is compared to calculations. The correlation between internal friction and thermal conductivity at low temperature is discussed.