Silicon Nitride Ceramics

A super-hard ceramic material of silicon nitride ceramics, its hardness is higher than that of alumina and zirconia, making it extremely difficult to process. At present, the processing of silicon nitride mainly adopts the grinding method, and the high-speed rotating diamond grinding rod is used to generate the grinding force, so as to achieve the grinding and shaping of the ceramic material. Due to the extremely high hardness, the feed and the amount of knife during processing are relatively small, and the processing efficiency is low. This is one of the reasons for the high cost of silicon nitride ceramic finishing. Junjie Ceramics has carried out a number of in-depth research experiments on this material, and summed up a set of effective processing methods, which has well improved some common problems in processing and made the processed products excellent in quality.

The strength of silicon nitride is very high. It is extremely resistant to high temperature. Its strength can be maintained to a high temperature of 1200°C without falling. It will not decompose until 1900°C. It is resistant to chemical corrosion and can withstand almost all inorganic acids and caustic soda below 30%. The solution can also be resistant to corrosion by many organic acids; silicon nitride ceramics is a high-temperature resistant engineering material with outstanding performance, which is mostly used in many high-temperature resistant fields. When it is heated to 1200°C in time, its strength will still not decrease, and it will not melt into a melt after being heated. It will decompose only when its temperature reaches 1900°C. Not only that, silicon nitride ceramics have excellent corrosion resistance. Inorganic acid solutions and caustic soda with a concentration of less than 30% can hardly be corroded. In addition, it can resist the corrosion of many organic acids; at the same time, it is a high-performance electrical Insulation Materials.

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