In modern industrial production, silicon carbide is extensively used. pressureless sintered silicon carbide and reaction sintered silicon carbide are two primary methods of preparation. Both of these two methods have their own characteristics and and work well in certain situations. Let us summarize briefly the differences of t non-pressure sintered silicon carbide and reactive sintered silicon carbide.
Let’s start by talking about pressless sintered silicon carbide. The process of pressureless sintering involves mixing silicon carbide powder with other raw materials at high temperatures, and the combination is then densified by hot pressing or vacuum treatment. The product’s performance is relatively poor, despite the method’s low cost and high manufacturing efficiency. Therefore, pressureless sintered silicon carbide is mainly suitable for some applications that have low performance requirements but have low cost including ceramics, grinding wheels, abrasives.
Next, let’s take a look at reaction sintered silicon carbide. Reaction sintered silicon carbide is a method of achieving densification by mixing silicon carbide powder with other materials at high temperature and then heating them to cause a chemical reaction. This disadvantage is that it results in a high-performing product at a high cost of production. Therefore, reaction sintered silicon carbide is the best choice for some applications that require great performance but are not price-sensitive, such as electronic materials, high-temperature wear-resistant materials, and high-performance ceramics. .
Generally speaking, pressureless sintered silicon carbide and reaction sintered silicon carbide have their own advantages and are suitable for different application scenarios. Pressureless sintered silicon carbide is suitable for applications that have low performance requirements but are cost-sensitive; while reaction sintered silicon carbide is suitable for applications that have high performance requirements but are not cost-sensitive. Therefore, when choosing the preparation method of silicon carbide, it is necessary to decide according to the specific application needs.
