Silicon nitride is a common additive in the metallurgical field. It is mostly a white powdery substance. There are actually many forms of silicon nitride, such as silicon nitride blocks, silicon nitride wafers, silicon nitride powder, etc.
Silicon nitride has good high temperature resistance and high wear resistance. It is also an indispensable component of silicon nitride ceramics. There are many types of silicon nitride products, and different products also use different production processes.
Silicon nitride products can be divided into reaction sintered products, hot pressed products, atmospheric pressure sintered products, isostatic pressing sintered products and reaction resintered products according to the process.
Among them, reaction sintering is a commonly used method for producing silicon nitride refractory products. The reaction sintering method produces silicon nitride products by molding finely ground silicon powder by machine pressing or isostatic pressing. After the green body is dried, it is heated to 1350~1400°C in nitrogen and is nitrided simultaneously during the sintering process. have to.
Using this production method, the raw material conditions, firing process and atmosphere conditions have a great impact on the performance of the products. Atmospheric pressure sintered silicon nitride is a product made by mixing synthetic silicon nitride powder and sintering aids evenly, then shaping, drying, and sintering at 1700 to 1800°C in a normal pressure nitrogen atmosphere.
In summary, the production process of silicon nitride products is shared with you. In addition to understanding these, you should also store silicon nitride products. Although silicon nitride has better performance, some silicon nitride products It is in powder form. During transportation and storage, the storage environment must be kept clean and hygienic to avoid contamination due to silicon nitride. Our silicon nitride manufacturers offer a wide range of products to make your choice a good one.
