Precision ceramic parts powder molding process: the complete production process from raw materials to finished products

Overview of powder forming process for precision ceramic parts

Precision ceramic parts powder forming process is a commonly used process for manufacturing precision ceramic parts. It uses precision ceramic parts powder as raw material and produces finished products through mold forming, drying and sintering processes. It has high process precision, low cost and flexible processing, and is suitable for manufacturing precision ceramic parts of various shapes, sizes and structures.
In the industrial production of ceramics, whether it is the classic hot isostatic pressing sintering or the new sintering technology, the mainstream ceramic forming process is based on dry or wet powder treatment. Among them, because of its low cost and simple process, dry pressing ceramic molding technology is suitable for the production of ceramic parts with relatively simple shape and relatively thin size, and its ceramic parts are widely used in automation, aerospace, nuclear energy and electronics fields.

Ceramic parts raw material selection

Precision ceramic parts powder mainly alumina, zirconia, yttrium oxide and so on. When selecting a raw material, it is necessary to consider its finished product performance, stability and availability. At the same time, it is also necessary to consider the characteristics and differences of different raw materials in the molding and sintering process to adjust the process parameters.

Ceramic parts powder preparation

Powder preparation is an important step in the production of precision ceramic parts. At present, the main preparation methods are mechanical ball milling, sol-gel method and chemical coprecipitation method. Among them, the mechanical ball milling method is one of the commonly used preparation methods. It grinds raw materials into micron-scale powder particles through shearing, rolling and impinging effects generated by mechanical energy. The quality of powder preparation has a greater impact on the quality of the finished product, which needs to be selected according to different application scenarios.

Ceramic parts forming process

The molding process is the process of transforming the powder into the desired shape. The main processes include pressing, extrusion and injection molding. Pressing is one of the most commonly used molding methods. By fixing the mold, the powder is filled in the mold, and then a certain pressure is applied to make the powder particles tightly bonded to form. The molding conditions and process parameters play a decisive role in the quality and performance of the finished product, and need to be adjusted according to the specific situation.

Ceramic parts powder sintering process

The sintering process is to heat the pressed precision ceramic parts to high temperature, so that it can undergo chemical reaction and obtain strong structural and mechanical properties. Parameters such as temperature, time and atmosphere need to be controlled in sintering process. Among them, temperature is one of the key factors, and different raw materials and molding processes require different sintering temperatures. At the same time, it is also necessary to consider the uniformity and stability of the sintering process to avoid the failure or quality reduction of the finished product due to the unreasonable sintering process.

In summary, the powder molding process of precision ceramic parts needs to consider the influence of multiple links, including raw material selection, powder preparation, molding process and sintering process. Only reasonable control and adjustment in each link can produce precision ceramic parts with high quality and good performance.