Transient grating experiment on CCl₄-filled porous glasses

Andrea Taschin (1) , Riccardo Cucini (1) , Carolina Ziparo (1) , Paolo Bartolini (1) , Renato Torre (1)

1 UniFI - Università degli Studi di Firenze = University of Florence = Université de Florence

We performed heterodyne detected transient grating experiments on porous glasses, characterized by different pore sizes, filled with liquid carbon tetrachloride. The measured signal shows an articulated profile characterized by different dynamic phenomena. In the faster time scale (t<0.1 μsec.) the acoustic processes take places. In the slower time scale (t>0.1 μsec.) unexpected relaxation/thermal diffusion phenomena shows up. In order to measure and address these dynamic evidences, we studied the effect of sample preparation on the experimental signal. Furthermore, we measured the sound velocity and attenuation as a function of sample treatment and temperature. The reported data shows clearly how the unremoved water contained into the pores can play a relevant role in the measure of physical parameters of liquid filled-glass systems.

Mots clés: Physical Sciences

Andrea Taschin, Riccardo Cucini, Carolina Ziparo, Paolo Bartolini, Renato Torre. Transient grating experiment on CCl₄-filled porous glasses. Philosophical Magazine, 2007, 87 (3-5), pp.715-722. ⟨10.1080/14786430600910756⟩. ⟨hal-00513745⟩