Lined ceramic products are widely used in chemical, energy, metallurgical and other fields due to their excellent high temperature resistance, corrosion resistance and wear resistance. The production process is complex and delicate, involving multiple key links to ensure the high quality and stability of the final product. This article will introduce the main production process of lined ceramic products in detail.
Raw material preparation and mixing
The production of lined ceramic products starts with the selection and proportioning of raw materials. The main raw materials include high-purity alumina, zirconium oxide, silicon carbide and other ceramic powders, which have high hardness, high temperature resistance and chemical stability. The raw materials must be strictly screened to ensure that the purity and particle size meet the requirements. Subsequently, the different raw materials are mixed in a specific proportion, and an appropriate amount of binder (such as organic adhesive or inorganic bonding material) is added to improve the strength and stability after molding. The mixing process usually uses high-speed stirring equipment to ensure that the raw materials are evenly distributed.
Molding process
The mixed ceramic powder needs to be made into the desired shape through a molding process. Common molding methods include dry pressing, isostatic pressing and slip casting. Dry pressing is suitable for products with simple shapes, which are pressed and formed under high pressure through a mold; isostatic pressing is suitable for complex structures, which uses high-pressure liquid to evenly apply pressure to improve the density and strength of the product; slip injection molding is mostly used for large or special-shaped parts, and the ceramic slurry is injected into the mold, and the green body is formed after the water evaporates.
Sintering and heat treatment
The formed green body needs to be sintered at high temperature to combine the ceramic particles into a dense structure. The sintering temperature is usually between 1600℃ and 1800℃, depending on the type of ceramic material. During the sintering process, the green body shrinks and forms a high-strength and high-hardness ceramic body. Some products also need heat treatment, such as annealing or surface strengthening, to further improve performance.
Surface treatment and testing
After sintering, ceramic products need to be surface treated, such as polishing, coating or inlaying metal parts, to meet specific application requirements. Finally, the product needs to undergo strict quality testing, including dimensional measurement, hardness testing, corrosion resistance evaluation, etc., to ensure compliance with industry standards.
The production process of lined ceramic products embodies the combination of material science and engineering technology. Its high quality and high performance make it an indispensable key component in the industrial field.
