Performance analysis of ceramic fiber cotton
Apr 30, 2022
Ceramic fiber cotton is made by melting raw materials at high temperature in a resistance furnace, and is produced by blowing or spinning process. Its diameter is generally 25 μ m. The length is mostly 30250 mm.
The fiber surface of ceramic fiber cotton is smooth cylindrical, and the cross section is usually circular. Its structural characteristics are high porosity (generally more than 90%), large pore diameter and specific surface area. Because the air in the pores has a good heat insulation effect, the size of pore diameter and the nature of pores (open or closed pores) in the fibers have a decisive impact on their thermal conductivity. In fact, the internal structure of ceramic fibers is a mixed structure composed of solid fibers and air, and its microstructure is characterized by the presence of both in-phase and gas phase in the form of continuous phase.
Therefore, in this structure, the solid material exists in the form of fiber and forms a continuous phase skeleton, while the gas phase continuously exists in the skeleton gap of the fiber material. Because of this structure, ceramic fiber has higher porosity, larger pore diameter and specific surface area, which makes ceramic fiber have excellent heat insulation performance and smaller bulk density.
