Phase Diagram of Isobutyric Acid and Water in Dilute Silica Gel

Zhiming Zhuang, Arturo G. Casielles, and David S. Cannell
Phys. Rev. Lett. 77, 2969 – Published 30 September 1996
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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.

  • Received 18 June 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.2969

©1996 American Physical Society

Authors & Affiliations

Zhiming Zhuang, Arturo G. Casielles, and David S. Cannell

  • Department of Physics, University of California at Santa Barbara, Santa Barbara, California 93106

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Issue

Vol. 77, Iss. 14 — 30 September 1996

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