Compositions: ceramic – Ceramic compositions – Refractory
Reexamination Certificate
2008-03-25
2008-03-25
Group, Karl E (Department: 1755)
Compositions: ceramic
Ceramic compositions
Refractory
C501S100000, C501S090000, C501S096100, C106S038280, C106S038900
Reexamination Certificate
active
10904191
ABSTRACT:
Ceramic composite material that has excellent mechanical properties within a range from room temperature to high temperature and high die release with respect to glass, resins, ceramics, and similar substances. The ceramic composite material is composed of a ceramic phase and a phase containing 2 to 98 wt. % carbon and/or boron nitride as the main component, and that has a mean particle size of 100 nm or less, wherein the thermal expansion coefficient is within a range of 2.0-9.0×10−6/° C. and the surface roughness after surface polishing is 0.05 μm or less. The sintered body of the material is obtained by sintering a mixture of powdered starting materials at a sintering temperature of 800-1500° C. and a sintering pressure of 200 MPa or higher.
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Ueno Tomoyuki
Yoshimura Masashi
Group Karl E
Judge James
Sumitomo Electric Industries Ltd.
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