Applications of SN-260 and SN-240 for riser tube or stalk tube in molten aluminum
Sialon,silicon nitride,alumina and silicon carbide are known as engineering ceramics. Among them, silicon nitride has the highest thermal shock resistance. Thus, it makes handling andpreheating control easier.Low wet tability against molten aluminum makes material adhesion on tube less and it makes daily maintenance easier.Super ior cor rosion resistance does not al low e luted contamination into molten metal. This is a key factor to maintain purity of molten alloys.Silicon nitride is a dense material and maintains its high mechanical strength even at elevated temperatures. Compared to reaction bonded materials, it assures trouble free operation. In fact, practical accomplishment shows more than 1 year in use.