What factors affect the high temperature resistance of alumina ceramics

As an important material in the field of industrial wear protection, wear resistant ceramics have always attracted much attention for their excellent high temperature resistance. So, what are the key factors that affect the high temperature resistance of wear-resistant ceramics? The following are several aspects that we have analyzed in depth:

1. The criticality of material purity: The wear-resistant ceramics we usually refer to generally refer to alumina wear-resistant ceramics, and their high temperature resistance is closely related to the purity of alumina. Alumina wear-resistant ceramics are born in a sintering environment of up to 1700°C, and they themselves have excellent high temperature resistance. However, when the purity of alumina is insufficient, other elements will be doped into the ceramics, which will cause adverse effects due to differences in their thermal expansion and contraction properties under high temperature or rapid temperature changes. Therefore, when facing a high temperature environment, it is particularly important to choose high-purity wear-resistant ceramics.

2. Smart choice of installation method: The installation method of wear-resistant ceramics also has a decisive influence on its high temperature resistance. Although the pasting method of ordinary ceramic glue is simple, its high temperature resistance range is limited to about 150℃, and even for high temperature glue, its limit is only 350℃. Once beyond this range, the viscosity of the glue will drop significantly, resulting in a greatly increased risk of ceramic falling off. In contrast, the stud welding method and the dovetail slot installation method are more reliable. They can withstand high temperatures up to 750℃, providing a solid guarantee for the stable operation of wear-resistant ceramics in extreme environments.

3. Selection strategy of composite materials: In industrial applications, wear-resistant ceramics are often used in combination with other materials such as metals and rubber. In this case, we should not only pay attention to the high temperature resistance of the wear-resistant ceramics themselves, but also fully consider the temperature resistance of the composite materials. For example, ceramic rubber composite materials may perform poorly under high temperature conditions. Therefore, careful consideration should be made when selecting materials to ensure that the high temperature resistance of the composite materials can meet the needs of actual working conditions. more information in website :  www.chemshun.com   office@chemshun.com