Composite ceramic mold and method for thermal bending forming of 3D glass

Abstract

The invention is suitable for the technical field of ceramic materials and provides a composite ceramic mold and a method for thermal bending forming of 3D glass. The method comprises the following steps: mixing the raw materials: 55-75 parts of zirconium silicate, 20-30 parts of boric oxide, 5-10 parts of silicon carbide, 4-10 parts of aluminum silicate, 1-3 parts of magnesium oxide, 1-3 parts oflanthanum oxide, 2-5 parts of titanium oxide, 2-5 parts of zinc oxide, 3-7 parts of calcium sulfate whisker, 10-20 parts of nano carbon black, and 10-20 parts of graphite, mixing proportionally, adding the materials into an ethanol solution and a phenolic resin, intensely stirring and mixing evenly to obtain a mixed slurry with certain viscosity; drying and sieving: drying the mixed slurry for 2.5-3 hours in a drying oven of 90-110 DEG C, sieving to obtain a composite powder body; prepressing and forming: putting the composite powder body in a graphite mold, prepressing at 8-12 MPa in a moldpressing former and forming; sintering at the high temperature: sintering the preformed graphite mold at the high temperature in a vacuum hot-pressing furnace, wherein the highest sintering temperature is 1550-1950 DEG C, the pressure is 25-45 MPa, the heat preservation time is 35-55 minutes, and the defects of poor oxidation resistance and poor wear resistance of the graphite mold are overcome.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials, and in particular relates to a composite ceramic mold and method for 3D glass hot-bending forming. Background technique [0002] 3D glass, with its advantages of thinness, transparency and cleanness, anti-fingerprint, anti-glare, hardness, scratch resistance, and good weather resistance, can not only improve the appearance of terminal electronic products, but also bring a very good user experience, especially With the approach of the 5G era, the application of the back cover is becoming more and more a trend. Compared with the previous 2D and 2.5D glass, the most prominent feature is that the traditional manufacturing process adds glass hot bending process. [0003] At present, there are two main heating methods for glass bending machines: electric heating and induction heating. The electric heating process uses a metal heating tube to heat the superalloy, and then heats the mold thro...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method for manufacturing a composite ceramic mold for 3D glass hot-bending forming, aiming at solving the problem in the prior art that the service life of the hot-bending forming mold is relatively low, which greatly increases the manufacturing cost of glass

Images