How does alkaline earth silicate fiber blanket maintain excellent thermal shock resistance in high temperature environment?
Publish Time: 2025-03-17
As a high-performance refractory insulation material, alkaline earth silicate fiber blanket shows excellent thermal shock resistance in high temperature environment. This feature not only makes it widely used in the industrial field, but also provides a valuable reference for us to explore high temperature material science.Alkaline earth silicate fiber blanket is mainly composed of SiO2, CaO, MgO and other components, which give it unique physical and chemical properties. Among them, SiO2, as the main network former, constitutes the basic skeleton of the fiber; and the introduction of CaO and MgO improves the softness and spinnability of the fiber, and also affects the heat resistance and solubility of the fiber to a certain extent. Due to the addition of alkaline earth oxides such as CaO and MgO, it is beneficial to expand the fiber viscosity range, improve the fiber conditions, increase the fiber rate and the softness of the fiber, and at the same time ensure the chemical composition of the soluble fiber. However, this also reduces the heat resistance of the fiber. Therefore, the alkaline earth silicate fiber blanket is usually positioned in the category of low-grade fibers with a use temperature not exceeding 1000℃.In terms of manufacturing process, the alkaline earth silicate fiber blanket uses a special fiberization process to draw the silicate glass melt into fibers. In this process, it is necessary to accurately control parameters such as the temperature of the melt, the drawing speed, and the cooling conditions to ensure the uniformity and stability of the fiber. In addition, in order to further improve the thermal shock resistance of the fiber, the manufacturer will also adopt a series of surface treatment and reinforcement technologies, such as spraying anti-oxidation coatings and adding reinforcing fibers. These measures not only enhance the high temperature resistance of the fiber, but also improve its wind erosion resistance and the bonding strength between fibers.From the perspective of microstructure, the excellent thermal shock resistance of the alkaline earth silicate fiber blanket is closely related to its unique fiber morphology and microstructure. The small diameter and aspect ratio of the fiber give it a higher specific surface area and surface energy, thereby enhancing the heat exchange capacity between the fiber and the surrounding environment. At the same time, the microporous structure and defects inside the fiber also provide it with a good thermal buffer layer, effectively reducing the destructive effect of thermal stress on the fiber. In addition, the interweaving and overlapping between the fibers also form a stable network structure, which improves the overall thermal shock resistance.In practical applications, alkaline earth silicate fiber blanket shows a wide range of applicability and excellent performance. Due to its good thermal insulation and high temperature resistance, it is widely used in the field of thermal insulation of industrial equipment such as high-temperature furnaces, kilns, pipelines, chimneys, etc. In these high-temperature environments, alkaline earth silicate fiber blanket can not only effectively reduce heat conduction and reduce energy consumption, but also improve the operating efficiency and safety of equipment. In addition, since it does not contain harmful substances and is environmentally friendly, it also meets the requirements of modern industry for green and environmental protection.In addition to the above advantages, alkaline earth silicate fiber blanket also has good flexibility and plasticity, which is convenient for application in equipment of various shapes. This feature gives it a unique advantage in the thermal insulation of complex structures. At the same time, due to its soluble characteristics, it can be dissolved in human body fluids, so it is also considered to be a green and environmentally friendly product that is harmless to human health.In summary, alkaline earth silicate fiber blanket maintains excellent thermal shock resistance in high temperature environment, thanks to its unique material properties, manufacturing process, microstructure and wide range of applications.
