- Time:Aug 17, 2023
The thermal conductivity of a refractory material refers to its ability to conduct heat, which measures the efficiency of the material for heat transfer. The higher the thermal conductivity, the better the material conducts heat, meaning heat can be transferred through the material faster.
The thermal conductivity of refractory materials is usually affected by the following factors:
1. Types of materials: Different types of refractory materials have different thermal conductivity. Generally speaking, the thermal conductivity of oxide refractory materials (such as alumina and magnesia) is relatively low, while the thermal conductivity of non-oxide refractory materials such as silicon carbide and silicon carbide materials is relatively high.
2. Temperature: Temperature has a significant effect on the thermal conductivity of refractory materials. In general, as the temperature increases, the thermal conductivity of refractory materials will also increase. However, some refractory materials may undergo phase change or structural change at high temperature, resulting in changes in thermal conductivity.
3. Structure and porosity: The structure and porosity of the refractory also affects thermal conductivity. A denser structure and lower porosity generally results in higher thermal conductivity, since heat is able to transfer more quickly through the material.
4. Moisture content: For some refractory materials, the moisture content will also affect the thermal conductivity. The presence of moisture can increase the thermal conductivity of the material, and the evaporation process can cause additional heat transfer.
To know the thermal conductivity value of a specific refractory material, it is necessary to refer to the relevant technical specification sheet or consult with the refractory material manufacturer. Different types of refractory materials as well as different manufacturing processes may result in different thermal conductivity ranges.
