Ceramics, as a material with a long history, have long penetrated into our lives. Alumina ceramics, as a member of the ceramic family, are widely used in various fields because of their unique properties. So, how is alumina ceramics processed?Today, let Junjie's belt unveil this mystery.
1. Preparation of raw materials for alumina ceramics.
The main raw material of alumina ceramics is alumina powder, the higher the purity, the better the performance of the ceramic made. In addition, some fluxes and plasticizers need to be added to reduce the sintering temperature and improve the molding properties of the ceramics.
2. Molding of alumina ceramics.
There are two main forming methods for alumina ceramics: one is grouting molding, and the other is pressing molding.
1.Grouting molding: The alumina powder is mixed with flux and plasticizer to make a slurry, and then injected into the mold, and after the slurry is solidified, the mold is demolded to obtain a green billet.
2.Pressing molding: Mixing alumina powder with flux and plasticizer, putting it into a pressing molding machine, and pressing under high pressure to obtain green billet.
3. Sintering of alumina ceramics.
After the green billet has been dried, it can be sintered. Sintering is a key link in the processing process of alumina ceramics, which directly affects the performance of ceramics. During the sintering process, the temperature, atmosphere and holding time need to be strictly controlled.
1.Temperature: The sintering temperature is generally controlled at about 1700, too high or too low will affect the performance of ceramics.
2.Atmosphere: During the sintering process, a reducing atmosphere needs to be maintained to prevent the alumina ceramics from being oxidized.
3.Holding time: If the holding time is too long or too short, it will affect the sintering density and performance of ceramics.
Fourth, the post-processing of alumina ceramics.
After sintering, alumina ceramics also need to be post-processed, such as cutting, polishing, drilling, etc., to meet the needs of different uses.
5. Application of alumina ceramics.
Alumina ceramics are widely used in aerospace, military, electronics, chemical, medical and other fields due to their excellent properties such as high strength, high hardness, high wear resistance and high corrosion resistance.
The processing process of alumina ceramics, from raw material preparation to molding, sintering, and post-processing, requires excellence in every step. It is this ingenuity that makes alumina ceramics play an important role in all walks of life. Junjie Ceramics hopes that through this article, you can have a deeper understanding of the processing process of alumina ceramics.