As an important part of the field of industrial wear-resistant ceramic, its high temperature resistance has been one of the focus of attention. Especially in some working conditions with large temperature change or high ambient temperature, choosing the correct type of wear-resistant ceramics and the correct installation method is of great significance for safe production and energy saving and high efficiency. So what are the main factors affecting the high temperature resistance of wear-resistant ceramics?
1、The material purity of wear-resistant ceramics: we often say that wear-resistant ceramics mostly refers to alumina wear-resistant ceramics, and the purity of alumina has a direct impact on the high temperature resistance of wear-resistant ceramics. Alumina wear-resistant ceramics are sintering in a high temperature environment of 1700℃, and their high temperature resistance is excellent. But in practical application, if the alumina purity is not high, ceramic will contain other elements, the material because of the performance is different, in high temperature or sudden cold heat will show different thermal expansion cold contraction performance, the temperature change gentle or small range, this situation is not obvious, but when the temperature changes dramatically or meet hundreds or even thousands of degrees of high temperature, this change will affect a lot, need to choose higher purity of ceramics,
2、Installation method: the installation method of wear-resistant ceramics also has a direct impact on the high temperature resistance of ceramics. For example, the use of ordinary ceramic adhesive paste ceramics, it can withstand the high temperature range of about 150℃, the special ceramic adhesive of Jingcheng special porcelain can raise the temperature to 350℃, but once beyond the temperature resistance range of the adhesive, the viscosity of the adhesive will decline sharply, easy to cause the ceramic fall off. Compared with the paste method, the stud welding method and the dovetail slot installed ceramic can withstand the high temperature of 750℃. Our newly developed integral formed wear-resistant ceramic pipes can greatly weaken the limitation of the installation method on the temperature resistance ability of ceramics
3、Composite materials with ceramics: ceramics are often used together with other materials, such as metal, rubber, etc. In this case, we should consider the temperature resistance of composite materials when judging the high temperature resistance of wear-resistant ceramics. For example, ceramic rubber composite material is not suitable for use in high temperature working conditions.
To sum up, there are three main factors affecting the high temperature resistance of wear-resistant ceramics, namely, the material purity of the ceramics itself, the ceramic installation method and the ceramic composite material. These factors need to be considered comprehensively when choosing wear-resistant ceramics.
