NEEDLE-SHAPED CERAMIC BODY, NEEDLE-SHAPED CERAMIC CATALYST BODY AND METHOD FOR PRODUCING SAME

Disclosed is a needle-shaped ceramic body which comprises a cordierite porous body that is stable at high temperatures and has a large specific surface area as a base material. Specifically disclosed is a needle-shaped ceramic body which comprises, as a base material, a cordierite porous body having...

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Bibliographische Detailangaben
Hauptverfasser:	OHJI, TATSUKI, KONDOH, NAOKI, KITA, HIDEKI, UENO, SHUNKICHI, DANIEL, DONI, JAYASEELAN, SUZAWA, TAKUMI, KOIKE, KAZUHIKO, NAKANISHI, TOMOHIKO, KANZAKI, SYUZO
Format:	Patent
Sprache:	eng ; fre ; jpn
Schlagworte:	ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS COMPOUNDS THEREOF CONCRETE ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING INORGANIC CHEMISTRY LIGHTING LIME, MAGNESIA MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	Disclosed is a needle-shaped ceramic body which comprises a cordierite porous body that is stable at high temperatures and has a large specific surface area as a base material. Specifically disclosed is a needle-shaped ceramic body which comprises, as a base material, a cordierite porous body having a large specific surface area which is stable at high temperatures and is composed of a porous structure having a certain porosity wherein a needle-shaped cordierite crystal phase is formed. Also disclosed are a needle-shaped ceramic catalyst body and a method for producing the same. By using a porous cordierite composed of needle crystals as a catalyst-supporting honeycomb structure, decrease in the specific surface area caused by sintering can be suppressed. Since a honeycomb structure can be directly produced from a cordierite sintered body by itself, there can be obtained a low-cost product by omitting a step for coating the inside of the honeycomb structure. L'invention porte sur un corps céramique en forme d'aiguille comprenant un corps poreux de cordiérite qui est stable à hautes températures et qui a une surface spécifique importante comme matériau de base. L'invention porte notamment sur un corps céramique en forme d'aiguille qui comprend, comme matériau de base, un corps poreux de cordiérite ayant une surface spécifique importante qui est stable à hautes températures et qui est composé d'une structure poreuse ayant une certaine porosité dans laquelle est formée une phase cristalline de cordiérite en forme d'aiguille. L'invention porte également sur un corps catalyseur céramique et sur son procédé de fabrication. En utilisant une cordiérite poreuse composée de cristaux en forme d'aiguilles telle qu'une structure en nid d'abeille supportant un catalyseur, il est possible de supprimer la diminution de la surface spécifique due au frittage. Du fait qu'une structure en nid d'abeille peut être produite directement à partir d'un corps fritté de cordiérite, il est possible d'obtenir un produit peu coûteux en omettant l'étape d'enrobage interne de la structure en nid d'abeille.