Analysis of factors that affect aluminum silicate fiber products’ performance in application

This issue we will continue to introduce factors that affect aluminum silicate fiber products’ performance in application.

2.Influence of working conditions on the properties of aluminum silicate fiber products
In reducing atmosphere, SiO2 in the fiber easily reacts with CO and H2 as follows:
SiO2+CO→SiO↑+CO2
SiO2+H2→SiO↑+H2O
As SiO2 is reduced to volatile substances, the fiber structure changes slowly and the surface becomes rough gradually. When mullite grains are formed inside the fiber, the fiber is easy to break, which accelerates the deterioration of the fiber.
3. The influence of impurities on the properties of aluminum silicate fiber products
Some impurities in aluminum silicate fiber products, such as Fe2O3, Na2O, K2O, etc., will react with other components in aluminum silicate fiber products at a lower temperature to form eutectic, the eutectic will destroy network structure of the fiber, and the viscosity inside the fiber is reduced, the crystallization activation energy that needs to be overcome for the rearrangement of the ion group during crystallization is reduced, and the crystallization temperature is reduced. At the same time, the eutectic accelerated the growth of crystal grains and promoted the pulverization of fibers.