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- W2085993362 abstract "A representative model of the diffusional process in an electrochemical system comprising two successive media has been developed analytically and proved experimentally. From the model a rapid (3–10 min) and simple method was obtained to determine simultaneously the porosity and tortuosity of non-conducting porous media. Likewise the determination of molecular diffusivities is presented, based on a standard experiment, and a satisfactory agreement between the measured values of molecular diffusivity, D0, and those given in the literature is obtained. On développe analytiquement et vérife expérimentalement un modèle représentant le processus diffusionel dans un système électrochimique au travers de deux milieux successifs. Ceci donne une méthode rapide (3 à 10 min) et simple pour déterminer simultanément la porosité et la tortuosité des milieux poreux non conducteurs d'électricité. Ainsi on détermine la diffusivité moléculaire, D0, à partir d'une expérience type, ayant obtenu une concordance satisfaisante entre les valeurs mesurées et celles données par la littérature. Man entwickelte und prüfte ein Modell für den Diffusionsprozess in einem elektrochemischen System, das aus zwei nacheinanderfolgenden Medien besteht. Aus dem besprochenen Modell entwickelte man eine rasche (3 bis 10 Min) und einfache Methode zur gleichzeitigen Bestimmung der Porosität und der Tortuosität der nichtleitenden porösen Medien. Die auf einem Standardversuch basierende Bestimmung der molekularen Diffusionskonstanten wird ebenfalls präsentiert. Die Uebereinstimmung der so gemessenen mit den in der Literatur zitierten Werten ist zufriedenstellend." @default.
- W2085993362 created "2016-06-24" @default.
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- W2085993362 date "1972-10-01" @default.
- W2085993362 modified "2023-10-18" @default.
- W2085993362 title "Rapid characterization of porous solids and measurement of molecular diffusivity: electrochemical method" @default.
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- W2085993362 doi "https://doi.org/10.1016/0013-4686(72)85060-6" @default.
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