Molding technology of Fused Silica Ceramic

The molding technology of Fused Silica Ceramic is generally used in the production of quartz ceramics at home and abroad. Generally, the grouting molding process is used, and there are also processes such as centrifugal casting molding, wax casting molding, isostatic pressing molding, and ramming molding. However, the products prepared by the above process generally have disadvantages such as uneven microstructure, difficulty in making products with complex shapes, long production cycles, high cost, and low efficiency. For example, the press-molded Fused Silica Ceramic body has shortcomings such as low strength, easy breakage and cracking, large deformation of the green body after firing, and low density, which makes it difficult to meet the needs of large-scale industrial production. At present, the more mature molding processes of Fused Silica Ceramic are the vibration pressure grouting process and gel injection molding process.

The following is a list of contents:

• Vibration pressure grouting process

• Gel injection molding process

Vibration pressure grouting process

The vibration pressure grouting process is improved based on the traditional grouting process. Compared with traditional slurry, Fused Silica Ceramic slurry has the characteristics of poor fluidity and strong tactile deformation, so it is difficult to remove air bubbles when molding large and thick products, which is easy to cause defects inside the product; in addition, long-term slurry absorption is also easy to cause particle segregation makes the green body density and structure non-uniform. The vibratory pressure grouting process is based on the traditional grouting process by introducing a vibrating device to accelerate the removal of air bubbles in the slurry by making the slurry vibrate. At the same time, the vibration of the slurry can also make the Fused Silica Ceramic particles rearrange, to achieve the effect of close packing, thereby significantly increasing the density of the green body. The vibration pressure grouting process introduces a pressure device at the same time as a vibration device to speed up the removal of water in the slurry and shorten the suction time, thereby solving the problem of particle segregation, reducing the defects existing in the body, and improving the efficiency. The density and uniformity of the green body. The key to vibratory pressure grouting technology is to prepare a slurry with good fluidity and suspension. Otherwise, during the vibration process, the Fused Silica Ceramic particles are prone to precipitation, resulting in the uneven structure of the green body. At present, vibratory pressure grouting molding technology is relatively mature.

Gel injection molding process

The gel injection molding process of Fused Silica Ceramic combines the traditional grouting process with the theory of organic chemistry. The organic monomers in the mold are polymerized to form a macromolecular network structure so that the slurry in the mold is rapidly solidified in situ to form a ceramic body with high mechanical strength. Compared with the injection molding process, the gel injection molding process has a short production cycle, uniform structure and density of the product, and high strength of the green body, so it can make Fused Silica Ceramic parts with complex shapes. Another great advantage of this process is that the equipment required is simple and the investment is low. Gel injection molding technology has been relatively mature. Fused Silica Ceramic missile radome, quartz ceramic crucible for solar polysilicon ingot, cover brick for glass furnace, bowl, leveling cylinder, gate brick, and other quartz ceramic products are all It was successfully produced using this molding technique. However, the acrylamide monomer used in gel injection molding technology is a neurotoxin, and research on non-toxic or low-toxic monomer raw materials is ongoing.

The above is the relevant content about the molding technology of Fused Silica Ceramic. If you are interested in Fused Silica Ceramic, you can contact us. Our website is https://www.yufengrefractory.com/. I look forward to your arrival very much and hope to cooperate with you.