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Evaluating Porosity in Cordierite Diesel Particulate Filter Materials, Part 1 X-Ray Refraction

A. Kupsch, A. Lange, M.P. Hentschel, Y. Onel, T. Wolk, A. Staude, K. Ehrig, B. R. Müller, G. Bruno

Journal of Ceramic Science and Technology, Vol. 4, No. 4 (2013), pp. 169-176

DOI: 10.4416/JCST2013-00021

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Abstract

Bi-continuous porous ceramics for filtration applications possess a particularly complicated microstructure, with porosity and solid matter being intermingled. Mechanical, thermal, and filtration properties can only be precisely estimated if the morphology of both solid matter and porosity can be quantitatively determined. Using x-ray absorption and refraction, we quantitatively evaluate porosity and pore orientation in cordierite diesel particulate filter ceramics. Porosity values turn out to agree with mercury intrusion measurements, while pore orientation factors agree with published crystallographic texture data.

Keywords

Porous ceramics, pore orientation, x-ray refraction, synchrotron, interface.

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