What is the preparation of ceramic nozzle?

The common raw materials of ceramic nozzle materials include oxides, carbides, borides, nitrides and additives. It is made by powder metallurgy process (mainly hot pressing sintering) after mixing various raw material powders and additives. Its process includes: raw material treatment - mixed material ball milling - drying and screening - sintering forming - processing and testing.

First, the treatment of raw materials. Ceramic nozzle is made by powder metallurgy process after mixing various powders and additives. The characteristics of raw materials determine or affect the preparation process and performance of subsequent ceramic nozzle materials to a certain extent. The basic requirements for raw material powder are as follows: 1. Refinement. 2. Highly purified. 3. Morphology and morphology of powder.

Ball milling of powder: the mixed raw materials configured according to a certain proportion must be strengthened by ball milling because the particle size is too large. The purpose of ball milling is to further refine the mixed powder, which is conducive to improving the compactness of the material and reducing the sintering temperature. The transverse crack in the unloading process is mainly due to the transformation of the original compressive stress field into tensile stress field. The formation of transverse crack is the main reason for the surface fragmentation of materials and the erosion of brittle materials. Drying of powder: the liquid medium after wet grinding or wet mixing shall be dried and removed. The drying of slurry is generally carried out in the vacuum drying system to ensure the complete drying of raw materials.