Porous permeable body and method for its preparation

Porous flow-through moulding consists of an exchangeable sealed honeycomb body made of silicon carbide.The moulding has a wall thickness of 1.25 +/- 0.5 mm, a porosity of 55-60 %, an average pore diameter of 25-70 microns, and 20-100 nPm. Also claimed is a production of the moulding, in which a powd...

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Bibliographische Detailangaben
Hauptverfasser:	MAIER, HORST R, SCHAEFER, WOLFGANG, BEST, WALTER, SCHUMACHER, UWE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARTIFICIAL STONE BLASTING CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS 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 LIGHTING LIME, MAGNESIA MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG STEAM ENGINES TRANSPORTING TREATMENT OF NATURAL STONE WEAPONS
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Beschreibung
Zusammenfassung:	Porous flow-through moulding consists of an exchangeable sealed honeycomb body made of silicon carbide.The moulding has a wall thickness of 1.25 +/- 0.5 mm, a porosity of 55-60 %, an average pore diameter of 25-70 microns, and 20-100 nPm. Also claimed is a production of the moulding, in which a powder made of silicon or silicon and small amounts of silicon carbide and carbon is moulded with a coked organic binder to a green body, especially extruded, which is then calcined in an inert atmosphere. The moulding produced is heated in the presence of nitrogen or inert gas containing nitrogen to such a temperature to react the free silicon with the carbon to silicon carbide. Recrystallisation calcining is carried out at above 2000 degrees C.