A method for pore size and porosity analysis of porous materials using electroacoustics and high frequency conductivity.

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Details zur Publikation

Autorinnen und Autoren: Dukhin A, Swasey S, Thommes M
Zeitschrift: Colloids and Surfaces A-Physicochemical and Engineering Aspects
Verlag: Elsevier B.V.
Jahr der Veröffentlichung: 2013
Band: 437
Seitenbereich: 127-132-132
ISSN: 0927-7757


Abstract

Electroacoustic measurement of the seismoelec. current generated by ultrasound in wetted porous materials yields information on pore size in certain situations. This occurs when elec. double layers inside the pore overlap or when the pore size is sufficiently large that for a given frequency the hydrodynamic flow cannot achieve a steady Poiseuille profile inside of the pores. Indeed, we show exptl. that magnitude and phase of the seismoelec. current become pore size dependent in such systems. Calcns. of pore size from such exptl. raw data requires information concerning the porosity of the material. We suggest using high frequency cond. measurement of the porous material to det. a "formation factor", which is the ratio of the wetted porous material cond. to the cond. of a equil. supernate. Porosity calcns. from the formation factor can be done by applying the Maxwell-Wagner theory. We provide exptl. verification that this theory can be applied for porous materials. [on SciFinder(R)]


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Zitierweisen

APA:
Dukhin, A., Swasey, S., & Thommes, M. (2013). A method for pore size and porosity analysis of porous materials using electroacoustics and high frequency conductivity. Colloids and Surfaces A-Physicochemical and Engineering Aspects, 437, 127-132-132. https://dx.doi.org/10.1016/j.colsurfa.2013.01.018

MLA:
Dukhin, A., S. Swasey, and Matthias Thommes. "A method for pore size and porosity analysis of porous materials using electroacoustics and high frequency conductivity." Colloids and Surfaces A-Physicochemical and Engineering Aspects 437 (2013): 127-132-132.

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