Thermal conductivity (also known as thermal conductivity) refers to the heat transferred through the unit area of the material along the heat flow direction under the unit temperature gradient in unit time.
The thermal conductivity of refractories can be measured according to the national standard GB / t5990-2006 test method for thermal conductivity of refractories (hot wire method) or the ferrous metallurgy standard Yb / t4130-2005 test method for thermal conductivity of refractories (water flow plate method).
The thermal conductivity of refractories is one of the most important thermophysical properties of refractories. It is not only an indispensable and important data in the design of high-temperature thermal equipment, but also a very important consideration in the selection of refractories.
The more complex the chemical composition of refractory is, the more obvious the decrease of thermal conductivity is; Materials with complex crystal structure have low thermal conductivity; Within a certain temperature, the larger the porosity,
The lower the thermal conductivity.
