BLACK LOW THERMAL EXPANSION CERAMIC AND MEMBER FOR ALIGNER

BLACK LOW THERMAL EXPANSION CERAMIC AND MEMBER FOR ALIGNER

PROBLEM TO BE SOLVED: To provide a ceramic having a low thermal expansion property, rigidity, and wear resistance, having low resistance, and having black color. SOLUTION: The ceramic contains (a) at least one kind selected from a group comprising cordierite, spodumene, and eucryptite, (b) carbon, a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YOSHITOMI YASUKI, ARAHORI TADAHISA
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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Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide a ceramic having a low thermal expansion property, rigidity, and wear resistance, having low resistance, and having black color. SOLUTION: The ceramic contains (a) at least one kind selected from a group comprising cordierite, spodumene, and eucryptite, (b) carbon, and (c) at least one kind selected from a group which consists of a carbide, a nitride, a boride, and a silicide of a group 4a element, a group 5a element, and a group 6a element and consists of a silicon carbide, a boron carbide, and a silicon nitride. The contents of the components (a), (b), and (c) are 57-99.89 vol.%, 0.01-3.0 vol.%, and 0.1-4.0 vol.% respectively. The ceramic has the porosity of