Percolation, depinning, and avalanches in capillary condensation of gases in disordered porous solids

Physics – Condensed Matter – Disordered Systems and Neural Networks

Scientific paper

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4 pages, 5 figures

Scientific paper

10.1209/epl/i2003-00407-y

We propose a comprehensive theoretical description of hysteresis in capillary condensation of gases in mesoporous disordered materials. Applying mean-field density functional theory to a coarse-grained lattice-gas model, we show that the morphology of the hysteresis loops is influenced by out-of-equilibrium transitions that are different on filling and on draining. In particular, desorption may be associated to a depinning process and be percolation-like without explicit pore-blocking effects.

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