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Statement of the coating of ceramic material forming an oxidation catalyst, in particular for the combustion engines, and parts coated
Statement of the coating of ceramic material forming an oxidation catalyst, in particular for the combustion engines, and parts coated
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机译:形成氧化催化剂的陶瓷材料涂层(特别是用于内燃机的涂层)和涂层部件的声明
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摘要
The internal walls, valves and head surfaces of pistons in internal combustion engines are coated with a ceramic catalytic crystalline coating formed by flame spraying a particulate mixture of 30 to substantially 100% (by weight) cerium oxide, 0,01-20% each of neodymium and praesodymium oxides and as optional ingredients one or more of aluminium, lanthanum, scandium, yttrium, thorium, niobium, tantalum and vanadium oxides. Aluminium may be added to the mixture to increase thermal conductivity of the coating; chromium or tungsten carbides may be added to resist abrasion. In practice the compositions may contain also phosphate, sulphate, lime, magnesia, silica and iron oxide as minor ingredients.
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