Soluble ceramic fiber needle punched blanket is a kind of alkaline earth silicate fiber developed and published in recent years. This is an alkaline earth silicate fiber with SiO2, MgO and Cao as the main components. Because it has certain solubility in human body fluid and reduces the damage to human health, it is called soluble fiber.
Due to the introduction of MgO, Cao and other components, it is conducive to expand the viscosity range of fiber forming, improve the fiber forming conditions, and improve the fiber forming rate and fiber softness. However, the introduction of MgO, Cao and other components produces low melting point compounds such as Cao • SiO2 and Cao • MgO • 2SiO2, resulting in the reduction of fiber heat resistance.
Therefore, generally soluble fibers are low-grade ceramic fibers, and their products are mostly used as backing materials for industrial kilns. In order to improve the heat resistance of the soluble fiber, the method of introducing zrO2 component is adopted to increase the viscosity of the glass phase, inhibit the growth rate of the crystal grain after the fiber is heated and crystallized, and realize the improvement of the heat resistance of the soluble fiber. At present, the United States, Britain, France and other countries have successively developed such products and put them on the market as commodities.
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