Why Alumina Ceramics Change Color After Prolonged Use?

 

Most ceramic products are basically white, and the same is true of alumina ceramics. But I don’t know why, after a long period of use, these ceramic products change from white castings to light yellow.

Is it alumina ceramic discoloration?

 

Of course not. The reason why white al2o3 ceramics will gradually turn light yellow is twofold. On the one hand, after sunlight exposure, its internal composition changes, and this change is irreversible. Consequently, the color will also change.

On the other hand, it may be that the alumina ceramic has deliquescence, resulting in hydrated alumina. In fact, not only ceramic products have this characteristic, but also other materials. Therefore, we can only overcome the phenomenon of al2o3 ceramic discoloration by minimizing the influence of external factors.

In addition to clarifying the reasons behind its discoloration, it is also necessary to master some basic principles. This helps ensure that using it to make shaft cores allows the products produced to meet the requirements and be used normally.

Considering the special material, it is necessary to be more cautious when designing the alumina ceramic shaft core. This helps reduce unnecessary damage. The main contents involved include the type, size, and position of the installation parts; the fixing method of the parts; the nature, direction, size, and distribution of the load; and types and sizes of al2O3 ceramic bearings. Also consider blank, manufacturing and assembly process, installation, transportation of alumina ceramic shaft, the deformation of the shaft, and a series of other factors.

In a word, it must be designed according to the specific requirements of the alumina ceramic shaft. However, on the premise of saving materials and reducing weight, try to use the cross-sectional shape of the same strength external dimension or large cross-sectional coefficient. Moreover, adopt a variety of structural measures to reduce stress concentration and improve strength. This further ensures the quality and performance of the product.