Compositions: ceramic – Ceramic compositions – Refractory
Patent
1996-03-13
2000-04-25
Marcantoni, Paul
Compositions: ceramic
Ceramic compositions
Refractory
501105, 501128, 252 62, 123 65PE, 123169E, 123169P, 123198E, C04B 3548
Patent
active
060544023
ABSTRACT:
An improvement in a thermally insulating component for an engine part, made by sintering from ceramic materials, comprises, the thermally insulating component having a composition, consisting of a mixture of zirconium oxide in the range of about 5% to about 25% by volume and mullite in the range of about 75% to about 95% by volume. Further, the mixture of zirconium oxide and mullite is obtained by chemically mixing the zirconium oxide and mullite in their molecular states, rather than mechanically mixing them. Another feature of this invention includes, forming said thermally insulating component by slip casting and pressureless sintering the mixture of zirconium oxide and mullite at a temperature no greater than 1700.degree. C. This improvement in a thermally insulating component for an engine part, made from a mullite-zirconia ceramic composite, embodying the present invention, is particularly useful in making flame decks for cylinder heads, and insulating coverings for pistons and exhaust ports.
REFERENCES:
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"Member for Grinder", Yamamoto et al., JP 04-135655, Chichibu Cement Co LTD. (Aug. 27, 1992).
"Production of Mullite-Zirconia Composite Ceramics", Shiga et al., JP 04-97942, Chichibu Cemet Co. LTD. (Jan. 21, 1992).
"Jig for High Temperature Burning", Goto et al. JP 03-215367, Kikusui Kagaku Kogyo KK (Dec. 11, 1991).
"Case for Calcining Fernte Core", Sakaguchi, JP 01-305853, Nippon Ferrite LTD. (Feb. 22, 1990).
"Production of Zirconia Reinforced Mullite Ceramics", Nakada et al. JP 01-20366, Nitachi Chem Co. LTD. (Nov. 17, 1989).
Haselkorn Michael H.
Hester Virgil R.
Long Michael C.
Caterpillar Inc.
Hart Frank L.
Khosla Pankaj M.
Marcantoni Paul
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