Compositions: ceramic – Ceramic compositions – Refractory
Patent
1997-06-18
2000-02-15
Group, Karl
Compositions: ceramic
Ceramic compositions
Refractory
501 972, 501 973, 501119, 501122, 501128, 428428, C04B 35596
Patent
active
060252901
ABSTRACT:
In the ceramics having a low heat conductivity, silicon nitride is contained as a main component, a composite oxide or a separate phase thereof and transition metal elements having 66 to 75 of atomic number are dispersed into a substrate, and a minute layer grown continuous to the substrate is formed on the surface of the substrate. The composite oxide is at least one of 3Al.sub.2 O.sub.3. 2SiO.sub.2, 2MgO.2Al.sub.2 O.sub.3.5SiO.sub.2, 2MgO.SiO.sub.2 and 4MgO.5Al.sub.2 O.sub.3.2SiO.sub.2. The adding quantity of the composite oxide and the separate phase thereof is 15 to 60 wt. % in terms of the composite oxide. The adding component of transition metal elements having 66 to 75 of atomic number is less 10 wt. % in terms of oxide of the transition metal elements.
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patent: 5023215 (1991-06-01), Cleveland
patent: 5120328 (1992-06-01), Pyzik
patent: 5234643 (1993-08-01), Matsumoto
patent: 5635431 (1997-06-01), Ikeda et al.
patent: 5637540 (1997-06-01), Li et al.
Group Karl
Isuzu Ceramics Research Institute Co. Ltd.
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