SINTERED TRANSLUCENT SCANDIUM OXIDE AND PROCESS FOR MAKING THE SAME

PROBLEM TO BE SOLVED: To provide a sintered scandium oxide showing a good translucency within visible and infrared regions, using an industrially applicable method. SOLUTION: A molded product whose green density is >=58% of the theoretical density and Al content is 5-100 wt.ppm, is prepared using...

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Hauptverfasser:	YANAGIYA TAKAKIMI, YAGI HIDEKI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CEMENTS CERAMICS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DEVICES USING STIMULATED EMISSION ELECTRICITY LIME, MAGNESIA METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS REFRACTORIES SLAG THEIR RELEVANT APPARATUS TRANSPORTING TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a sintered scandium oxide showing a good translucency within visible and infrared regions, using an industrially applicable method. SOLUTION: A molded product whose green density is >=58% of the theoretical density and Al content is 5-100 wt.ppm, is prepared using a raw material powder of highly pure scandium oxide with a Si content of =99.9%. The molded product is burned at 1,400-1,800 deg.C under a vacuum, from which binders have been removed through heating. The process yields translucent ceramics showing a linear transmittance of >=77% at a wavelength of 500 nm-5 μm.