Phase Diagram of Isobutyric Acid and Water in Dilute Silica Gel
- 30 September 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 77 (14) , 2969-2972
- https://doi.org/10.1103/physrevlett.77.2969
Abstract
Measurements of the isobutyric acid (IBA) concentration in a dilute silica gel, vs that in an IBA and water reservoir in equilibrium with the gel, show that first-order phase transitions occur at 15 and 19 °C, but not at 23 °C. The data show that the coexistence curve of this gel/mixture system is narrow, contained within that of the pure mixture, and lies below a broad region of apparent metastability. The existence of a metastable state above the critical temperature of the gel/mixture system is strikingly similar to the behavior observed for random-field magnets.Keywords
This publication has 20 references indexed in Scilit:
- Critical Behavior of a Fluid in a Disordered Porous Matrix: An Ornstein-Zernike ApproachPhysical Review Letters, 1995
- Correlated Random-Chemical-Potential Model for the Phase Transitions of Helium Mixtures in Porous MediaPhysical Review Letters, 1995
- Phase diagram ofHe mixture in aerogelPhysical Review Letters, 1993
- Phase separation, density fluctuation, and critical dynamics ofin aerogelPhysical Review Letters, 1993
- The random field Ising modelJournal of Magnetism and Magnetic Materials, 1991
- Ordering and phase transitions in random-field Ising systemsPhysical Review Letters, 1991
- Superfluid density from heat-pulse propagation near the λ line insystemsPhysical Review Letters, 1991
- Liquid-vapor critical point ofin aerogelPhysical Review Letters, 1990
- Disorder and the Superfluid Transition in LiquidPhysical Review Letters, 1988
- Critical Behavior in Gels Saturated with Binary Liquid MixturesPhysical Review Letters, 1984