J. Phys. IV France 02 (1992) C1-759-C1-762
CARACTÉRISATION ACOUSTIQUE ET MÉCANIQUE DES AÉROGELS DE SILICEA.C. ARMAND and D. GUYOMAR
Direction des Services Acoustiques, THOMSON SINTRA ASM, BP. 138, F-06561 Valbonne, France
An acoustical and mechanical study on SiO2 aerogels was investigated. In our paper we present the measurements of the bulk modulus for different pressures (from Patm to 100 bar) and of the transmitted and reflected coefficients of samples for frequencies lower than 15 kHz. These experiments confirm the relation between the Young modulus and the mass density, and show that the bulk modulus is linear with pressure.
© EDP Sciences 1992