ALUMINA-BASED SINTERED COMPACT, MEMBER FOR TREATING DEVICE USING THE SAME, TREATING DEVICE, AND METHOD FOR TREATING SAMPLE

PROBLEM TO BE SOLVED: To provide an alumina-based sintered compact in which the difference between the values of tanδ at a surface layer part and an inner part is small. SOLUTION: The alumina-based sintered compact is characterized in that the alumina purity is ≥99-99.7 mass% and the maximum peak in...

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Hauptverfasser:	KAJIWARA ISATERU, INOUE SATOYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY LIME, MAGNESIA METALLURGY REFRACTORIES SEMICONDUCTOR DEVICES SLAG TREATMENT OF NATURAL STONE
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an alumina-based sintered compact in which the difference between the values of tanδ at a surface layer part and an inner part is small. SOLUTION: The alumina-based sintered compact is characterized in that the alumina purity is ≥99-99.7 mass% and the maximum peak intensity of α-alumina crystal phase, measured by X-ray diffraction method, is assigned to (104) plane in a surface layer part and to (113) plane in an inner part at a depth of ≥10 mm from the surface layer part. COPYRIGHT: (C)2007,JPO&INPIT