Alumina ceramics is a kind of ceramic products made with alumina as the main raw material, which has been widely used in many fields of the national economy due to its excellent performance. However, with the increase in application demand, higher requirements are also put forward for the precision machining process of alumina ceramics.
The precision machining process of alumina ceramics is mainly achieved by powder preparation, which has high molding rate, fast work efficiency and high product success rate.
First of all, the alumina powder entering the factory is prepared into powder materials through different molding processes according to different product requirements. The particle size of this powder is required to be less than 1 m. For the manufacture of high-purity alumina ceramic products, in addition to the requirement that the purity of alumina reach 99In addition to 99%, it is also necessary to carry out ultra-fine grinding of the powder and ensure that the particle size distribution of the powder is uniform. Then, extrusion or injection molding is used to introduce binders and plasticizers for preparation. During the preparation process, it is necessary to pay attention to the ratio requirements of binder and plasticizer.
In general, thermoplastics or resins with a weight ratio of 10-30% are used as binders. The organic binder should be homogeneously mixed with the alumina powder at a temperature of 150-200 degrees Celsius to facilitate the molding operation. If the hot pressing process is used, the powder raw material does not need to be added with a binder. For the semi-automatic or fully automatic dry pressing molding method, the powder needs to be treated by spray granulation method to make the finished alumina ceramic product appear spherical, so as to improve the fluidity of the powder and facilitate the automatic filling of the mold wall in the molding process of the powder material. In addition, in order to reduce the friction between the powder and the mold wall, it is also necessary to add 1 2% lubricant, such as stearic acid, and binder PVA.
To sum up, the above is the precision machining process of alumina ceramics. At present, there are not many precision machining manufacturers of alumina ceramics, including Junjie ceramics.