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22-12-2016 | Original Paper | Issue 7/2017

Journal of Materials Science 7/2017

Interaction of Na, K, and Fe with porous cordierite at elevated temperatures

Journal:
Journal of Materials Science > Issue 7/2017
Authors:
Kun Yang, John T. Fox, Robert Hunsicker
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Electronic supplementary material

The online version of this article (doi:10.​1007/​s10853-016-0665-2) contains supplementary material, which is available to authorized users.

Abstract

The effects of Na, K, and Fe with porous cordierite were investigated at elevated temperatures. Samples of unused diesel particulate filter cordierite substrates were doped with sodium, potassium, and iron. The doped samples were heated in a thermal gravimetric analyzer to 300, 500, 900, and 1100 °C. The resulting interactions were analyzed with scanning electron microscopy, wavelength-dispersive X-ray spectroscopy (WDS), and X-ray diffraction. The alkalis and iron induced corrosion and degradation to the cordierite substrate at temperatures lower than pristine cordierite substrate samples. The corrosion and degradation pathway followed the porous structure as observed with WDS.

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