The strength of refractory materials often changes significantly at high temperatures, which is closely related to the crystal phase within the material. When certain crystal phases or individual crystal phases in refractory materials melt or form a melt at high temperatures, their strength will drop sharply. This change is mainly due to the melting of the crystal phase, which causes obvious changes in the material structure, thereby weakening the material's load-bearing capacity.
In addition to the crystal phase, refractory materials may also contain a certain amount of glass phase, such as silica bricks, clay bricks and high alumina bricks. The matrix of these materials consists primarily of a glassy phase, and the strength of composite phase materials decreases with increasing temperature. But when the temperature further increases, the viscosity of the glass phase changes from brittle to strong, making the bond between the material particles stronger, thereby significantly improving the strength.
As the temperature continues to increase, the viscosity of the glass phase will drop sharply, eventually leading to a sharp drop in the melt viscosity of the product. This change directly affects the strength of the refractory material. Therefore, precise control of the temperature of the working environment becomes the key to ensuring material performance.
When the refractory material contains a certain amount of binder that changes with temperature, the strength of the product will inevitably fluctuate accordingly as the temperature increases. For example, in various types of blocks such as AZS blocks and corundum, the different characteristics of the binders will directly affect the service life and stability of the materials in high temperature environments. Therefore, selecting appropriate binder materials is crucial to improving the reliability of refractory materials.
In practical applications, such as steel furnace linings, boiler inner walls and other high-temperature working environments, the selection of refractory materials is particularly critical. In order to ensure that the material has excellent fire resistance and stable organizational structure at high temperatures, it is recommended to use composite phase materials, such as AZS blocks, fused corundum and other high-performance materials. At the same time, attention should be paid to the control of ambient temperature and the scientific selection of binding agents. Ensure continued stability and reliability of material performance.
By understanding the change patterns of refractory materials under different temperature conditions, we can more effectively predict and respond to the performance of materials in practical applications, thereby providing strong guarantee for industrial production.
In summary, the selection of refractory materials should comprehensively consider the temperature dependence of the crystal phase and glass phase as well as the characteristics of the binder so that it can perform optimally in high temperature environments.
