Thermal conductivity of tulenkestävät tiilet (thermal conductivity)

The thermal conductivity (thermal conductivity) of refractory bricks, that is, its ability to transfer heat, is usually expressed in terms of thermal conductivity. Thermal conductivity refers to the amount of heat passed by a unit area in a unit time and a unit temperature gradient in the process of energy transfer. The thermal conductivity of different materials is often very different. At room temperature, the thermal conductivity of various refractory bricks can range from a few percent to several tens (w/(m·℃)), and the difference between the highest value and the lowest value is nearly a thousand times. As the temperature increases, the thermal conductivity difference of various refractory bricks tends to decrease, but the difference is still very large. For example, at 1000℃, the thermal conductivity of lightweight silica is only about 0.35W/(m·℃); recrystallized silicon carbide products are about 17.5W/(m·℃); graphite can be as high as 35W/(m·℃) .