ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Cordierite honeycomb with hexagonal shaped open channels was formed by extrusion formingtechnique using specially designed mould for the raw oxide mixture of talc, kaolin, alumina andaluminum hydroxide. The honeycomb showed extremely thin wall thickness of 0.15 mm and lowcoefficient of thermal expansion (CTE) for the high number of cells per square inch (cpsi) approaching to600. The extruded honeycomb was sintered at various conditions and characterized by XRF, TGA-DTA,XRD, TMA and SEM techniques. The indialite crystalline showing the coefficient of thermal expansionof 1.9 × 10-6/°C was formed while sintering at 1,450°C for 5 h. The influence of Fe2O3 additive andheating condition on the CTE of cordierite was analyzed in details. This particular cordierite honeycombwith high numbers of hexagonal shaped open cells showed a distinct advantage of saving the amount ofprecious metal catalyst materials to be coated on the substrate in comparison with the honeycomb withrectangular cells while improving the degree of catalyst efficiency when applying the substrate ofautomotive catalytic converter
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1035.pdf
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