Machinable ceramic

A high-strength machinable ceramic capable of high-precision fine machining has a coefficient of thermal expansion close to that of silicon and preferably a uniform blackish color which facilitates image processing of machined parts. The ceramic comprises a main constituent and a sintering aid. The...

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Main Authors ARAHORI, TADAHISA, ETOH, SHUNICHI, MORI, KAZUMASA
Format Patent
LanguageEnglish
French
German
Published 30.03.2005
Edition7
Subjects
ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
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Abstract A high-strength machinable ceramic capable of high-precision fine machining has a coefficient of thermal expansion close to that of silicon and preferably a uniform blackish color which facilitates image processing of machined parts. The ceramic comprises a main constituent and a sintering aid. The main constituent comprises 30 - 59.95 mass % of boron nitride, 40 - 69.95 mass % of zirconia, optionally up to 20 mass % of silicon nitride and 0.05 - 2.5 mass % (calculated as an element) of at least one coloring additive, which is selected from C, Si, elements of Groups IIIA - IVB in the fourth period, elements of Groups IVA - VB in the fifth period, elements of Groups IVA - VIB in the sixth period of the long form periodic table, and compounds of these elements.
AbstractList A high-strength machinable ceramic capable of high-precision fine machining has a coefficient of thermal expansion close to that of silicon and preferably a uniform blackish color which facilitates image processing of machined parts. The ceramic comprises a main constituent and a sintering aid. The main constituent comprises 30 - 59.95 mass % of boron nitride, 40 - 69.95 mass % of zirconia, optionally up to 20 mass % of silicon nitride and 0.05 - 2.5 mass % (calculated as an element) of at least one coloring additive, which is selected from C, Si, elements of Groups IIIA - IVB in the fourth period, elements of Groups IVA - VB in the fifth period, elements of Groups IVA - VIB in the sixth period of the long form periodic table, and compounds of these elements.
Author MORI, KAZUMASA
ETOH, SHUNICHI
ARAHORI, TADAHISA
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DocumentTitleAlternate Céramique usinable mécaniquement
Maschinell verarbeitbare Keramik
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Snippet A high-strength machinable ceramic capable of high-precision fine machining has a coefficient of thermal expansion close to that of silicon and preferably a...
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SubjectTerms ARTIFICIAL STONE
CEMENTS
CERAMICS
CHEMISTRY
COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS
CONCRETE
LIME, MAGNESIA
METALLURGY
REFRACTORIES
SLAG
TREATMENT OF NATURAL STONE
Title Machinable ceramic
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