Temperature-pressure hysteresis of the acoustic parameters of the supercooled liquids

A. V. Rudin

doi:10.1117/12.222770

4 October 1995 Temperature-pressure hysteresis of the acoustic parameters of the supercooled liquids

A. V. Rudin

Proceedings Volume 2643, Acousto-Optics and Applications II; (1995) https://doi.org/10.1117/12.222770
Event: Acousto-Optics and Applications VI, 1995, Gdansk-Jurata, Poland

Abstract

The study of the pressure dependence of the velosity and coefficient absorption of ultrasonic waves at two complex polyethers and mineral oil is reviewed. Acoustical parameters were measured in the frequency range 3-27 MHz and interval of temperatures from 223 to 313 K and at pressure from 0, 1 to 150 MPa. It was found that pressure dependence of velosity is nonlinear and reduces at low temperature. The value increases with pressure and attains the maximum with cooling of liquids. The temperature of maximum attenuation of longitudinal waves increases with increasing pressure at a rate of dT/dP equals 0,0103-0,019 K/bar. By comparison temperature dependence acoustic parameters obtained for different regimes of isobar cooling with following throw off pressure in the glassy state effect have been discovered, which gets the name of temperature-pressure hysteresis.

Citation Download Citation

A. V. Rudin "Temperature-pressure hysteresis of the acoustic parameters of the supercooled liquids", Proc. SPIE 2643, Acousto-Optics and Applications II, (4 October 1995); https://doi.org/10.1117/12.222770

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