I don’t know if you have found that the ceramic fiber blanket is not heat-conducting, so why is it not hot for it? Many friends don’t know much about this phenomenon. Here is a brief introduction to the reasons for non-thermal conduction:
Because the aluminum silicate fibers overlap each other, a large number of gas cartridges are formed inside. These gas cartridges store a large amount of air, so that the air cannot flow freely, generally relatively static, and the heat absorbed by the gas. It can only be transmitted inside the gas in a conductive manner, and because the gas has a small thermal conductivity at rest, it is impossible to use a gas for heat transfer.
Second, the conduction and heat transfer of fibers;
Because the interlacing of the aluminum silicate fibers in the paper has no directionality, the fibers are present in all directions, while the heat is transferred along the fibers, and the fibers are rarely perpendicular to the hot surface, and the fibers are also between When they overlap each other, this increases the thermal resistance of heat conduction, so the heat transfer effect of heat in the ceramic fiber blanket is not obvious.
Third, the radiation heat transfer of the fiber;
The fibers in the ceramic fiber blanket are not transparent, so that the heat rays cannot penetrate the fibers, and the fibers are very fine, so that the heat radiation is not well received, so the heat transfer effect is not obvious.
I believe that everyone knows a lot about the knowledge of ceramic fiber blankets. Then, after understanding the factors of non-thermal conductivity, do you have a new understanding of it? Today we will simply understand this.