SILICON NITRIDE POROUS BODY AND METHOD OF MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To provide a method of manufacturing a porous silicon nitride ceramic having high porosity and high strength. SOLUTION: In the method of manufacturing the silicon nitride porous body having high porosity and high strength, the silicon nitride porous body having 40-75% porosity...

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Hauptverfasser:	YO KENHO, OJI TATSUKI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE LIME, MAGNESIA METALLURGY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRACTORIES SEPARATION SLAG TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of manufacturing a porous silicon nitride ceramic having high porosity and high strength. SOLUTION: In the method of manufacturing the silicon nitride porous body having high porosity and high strength, the silicon nitride porous body having 40-75% porosity and 20-40 MPa strength is manufactured by molding mixed powder prepared by incorporating 1-10 wt.% silicon nitride seed crystal in mixed powder of silicon dioxide powder with carbon powder, heating the molding at a prescribed temperature rising rate in a nitrogen atmosphere or an inert gas atmosphere containing nitrogen to pre-heat the molding and heating further at a prescribed temperature rising rate to sinter the molding. The silicon nitride porous body manufactured by the method and having 60-75% porosity and 20-40 MPa strength and a structural member comprising the porous body are provided. COPYRIGHT: (C)2005,JPO&NCIPI