Le processus de production de céramique fine d’alumine
The finishing process ofAlumine Céramique fineis to first prepare the alumina powder entering the factory into powder materials by different molding processes according to different product requirements. The particle size of this powder is required to be less than 1 μm. If highpurityAlumine Céramique fineparts or precision ceramic structural parts are manufactured, in addition to the alumina purity of 99.99%, the powder needs to be ultra-finely pulverized and used. The particle size distribution of the powder that has been ultra-finely pulverized is uniform. Then the ultra-finely pulverized powder is extruded or injection molded. During the preparation process, the powder needs to be introduced with a binder and a plasticizer. It should be noted that the binder and the plasticizer have a certain ratio. Require.
En général, il s’agit d’un thermoplastique ou d’une résine avec un rapport pondéral de 10 à 30%. Le liant organique doit être mélangé uniformément avec la poudre d’alumine à une température de 150-200 degrés Celsius pour faciliter l’opération de moulage. Si le processus de pressage à chaud est utilisé, la matière première en poudre n’a pas besoin d’être ajoutée avec un liant.
If the semi-automatic or fully automatic dry pressing method is used, there are special technological requirements for the powder, which requires spray granulation to process the powder. The finished product ofAlumine Céramique fines is made into a spherical shape, which is also beneficial to improve the fluidity of the powder and facilitate the automatic filling of the mold wall during the molding process of the powder material. In addition, in order to reduce the friction between the powder and the die wall, it is also necessary to add 1-2% lubricants, such as stearic acid, and the binder PVA.
The strengthening process ofAlumine Céramique finesis a further improvement on this basis, not only from the production process of the product, but also has obvious effects on the improvement of the success rate of the product