- Time:Jun 09, 2023
(一)Density conductivity of alumina brick
The density and thermal conductivity of alumina brick are closely related, as the density of the brick affects its ability to conduct heat. Generally, higher-density alumina bricks have a lower thermal conductivity than lower-density bricks, due to their greater resistance to heat transfer.
The density of alumina brick can vary depending on several factors, such as the purity of the alumina, the manufacturing process used, and the size and shape of the bricks. Typical densities for alumina brick range from about 2.8 to 3.5 g/cm^3 (grams per cubic centimeter), although some specialty bricks may have different densities.
The thermal conductivity of alumina brick can also vary depending on these factors, as well as the temperature at which the brick is operating. Generally, high-purity dense alumina bricks have a lower thermal conductivity than lower-purity or less-dense bricks, with typical values ranging from about 1 to 4 W/m-K (watts per meter-kelvin) at room temperature.
Alumina brick is commonly used in high-temperature applications where low heat transfer is desirable, such as furnace linings, kiln linings, and thermal insulation. Its density and thermal conductivity properties make it well-suited for these applications, as it can help to reduce heat loss and improve energy efficiency.
(二)Thermal conductivity of alumina brick
The thermal conductivity of alumina bricks depends on several factors, such as the purity and density of the alumina, the manufacturing process used, and the operating temperature. Generally, high-purity dense alumina bricks have a lower thermal conductivity than lower purity or less dense bricks.
The thermal conductivity of alumina bricks can range from about 1 to 4 W/m-K (watts per meter-kelvin) at room temperature, depending on their composition and other factors. At high temperatures, the thermal conductivity of alumina bricks tends to increase due to the greater movement of electrons and phonons within the material.
Alumina bricks are commonly used in high-temperature applications where low heat transfer is desirable, such as furnace linings, kiln linings, and thermal insulation. Their relatively low thermal conductivity helps to reduce heat loss and improve energy efficiency, while their high melting point and excellent thermal stability make them well-suited for use in harsh environments where other materials may fail.
