Compositions: ceramic – Ceramic compositions – Refractory
Reexamination Certificate
2005-01-25
2005-01-25
Group, Karl (Department: 1755)
Compositions: ceramic
Ceramic compositions
Refractory
C501S097200, C501S097300, C502S200000, C264S628000, C264S647000, C264S659000
Reexamination Certificate
active
06846764
ABSTRACT:
A silicon nitride porous body which is obtained by nitriding a molded body having metallic silicon as a main component and by performing a high temperature heating treatment at a temperature higher than the nitriding temperature, and which has a porous structure with an average pore diameter of 3 μm or above, and contains at least one kind of element selected from the group consisting of the groups 2A, 3A, 3B inclusive of lanthanoid elements, and 4B. The silicon nitride porous body has a porous structure with a large average pore diameter, a test specimen cut out from the porous body exhibiting a high thermal conductivity and a small thermal expansion coefficient, and can be suitably used in a component for purifying gas and/or solution such as a ceramic filter.
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Translation of JP 2001293315, Oct. 23, 2001.
Inoue Katsuhiro
Kawasaki Shinji
Masuda Masaaki
Morimoto Kenji
Sakai Hiroaki
Group Karl
NGK Insulators Ltd.
Parkhurst & Wendel L.L.P.
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