Abstract

A technique is described that allows for the permanent removal of the wall porosity from monolithic catalyst support ceramic samples in order to have a better characterized porous medium. Specific acoustic impedance measurements for a rigid-backed ceramic sample have confirmed the effects of wall porosity on sound propagation in square-tube, capillary-type porous ceramics previously observed by Arnott and co-workers [J. Acoust. Soc. Am. 90, 3299–3306 (1991)].

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