There are many uses of silicon nitride ceramics , making porcelain mouth is one of them. In fact, the porcelain tip is also called the ceramic rivet, just like a capillary. The porcelain tip is used as a welding needle of the bonding machine, which is suitable for welding diodes, triodes, thyristors, LEDs, surface acoustic waves, IC chips and other circuits. Using ceramics as the chopper has high hardness, high specific gravity, fine crystal grains, high surface finish and high dimensional accuracy of the product.

The purpose of the ceramic nozzle is to divert the shielding gas, and the size of the ceramic nozzle is closely related to the shape of the appearance of the weld. The size of the porcelain mouth depends on the width of the weld pool and the width of the molten pool. The larger the width of the molten pool, the larger the protection range required, so the larger the porcelain mouth is required. The metal arc welding wire is fed through the wire wheel, the contact tip conducts electricity, an arc is generated between the base material and the welding wire, the welding wire and the base material are melted, and the arc and molten metal are protected by an inert gas argon for welding. In welding, the larger the nozzle type, the better the corresponding shielding gas, and the higher the welding forming factor. At the same time, the original color of welding can be guaranteed.

Silicon nitride is very strong, especially hot-pressed silicon nitride, which is one of the hardest substances in the world. It is extremely resistant to high temperatures, and its strength can be maintained at a high temperature of 1200°C without falling. It will not melt into a melt after being heated, and it will not decompose until 1900°C, so it can work for a long time. Moreover, silicon nitride has amazing chemical corrosion resistance, can resist almost all inorganic acids and caustic soda solutions below 30%, and can also resist the corrosion of many organic acids; it is also a high-performance electrical insulating material. Therefore, the porcelain mouth made of silicon nitride ceramics has all the excellent properties of silicon nitride. Compared with ceramic porcelain mouths made of other materials , these excellent properties are its advantages.