Due to the high porosity of aluminum silicate fiber, the gas is divided into almost stationary tiny pores. At this point, because the pressure within the dispersed multi-pore chambers is constant, this pressure, along with the solid fiber, forms a dense barrier that obstructs the intrusion of thermal gas flow.

The conduction and heat transfer of aluminum silicate fiber. Due to the lack of clear directional alignment in the fibers, solid heat conduction can only occur along the fiber rods, resulting in incomplete heat conduction perpendicular to the heat surface, thereby extending the transmission path. Additionally, 80% of the fiber interactions are point contacts, further increasing the thermal resistance of heat conduction. Consequently, the heat transfer effect through the fibers within the refractory fiber is not significant.

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