The hard material of mechanical seal silicon nitride ceramic-

The hard material of mechanical seal silicon nitride ceramics
　2019-01-24　　
Silicon Nitride Ceramic, a hard material for mechanical seals:
Silicon nitride ceramics is also a new type of friction pair material with good performance. Its wear resistance is good, the friction coefficient is low, and it has excellent corrosion resistance, and the expansion coefficient is small, about (2.5-2.8)*/℃, and its thermal shock resistance is better than that of silver oxide ceramics. According to different manufacturing processes, silicon nitride ceramics are mainly divided into reaction sintering Si3N4, pressureless sintering Si3N4 and hot pressing sintering 3丨04. Table 5-10 lists the performance of reaction sintered Si3N4 and hot press sintered Si3N4. Sand mill mechanical seal
Table 5-10 Performance of reaction sintered Si3N4 and hot press sintered Si3N4

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