The fire resistance limit of ceramic fiber textiles is usually related to the specific material type and the use environment. The fire resistance limit of conventional products can reach more than 2 hours, and some high-performance products can maintain structural stability for a long time at a high temperature of 1260℃. The following is a specific analysis:
Ceramic fiber textiles are fibrous lightweight refractory materials, and their fire resistance limit is affected by fiber composition, density, thickness and use scenarios. For example, standard aluminum silicate fiber products with alumina and silica as the main components can maintain structural integrity for more than 2 hours in an environment above 800℃; and zirconium-containing aluminum silicate fiber products can still maintain thermal shock resistance at a high temperature of 1500℃ due to the addition of zirconium oxide stabilizers, which are suitable for extreme scenarios such as industrial kiln linings.
From the technical parameters, the thermal conductivity of ceramic fiber textiles at 1000℃ is only 1/5 of that of clay bricks, and the heat capacity is only 1/72 of that of refractory bricks. This low thermal conductivity and low heat storage characteristics enable it to significantly delay heat transfer in high temperature environments. For example, a high-purity ceramic fiber blanket with a thickness of 10-50 mm can maintain mechanical strength at 1260°C. After being combined with metal anchors or stitching processes, its overall fire resistance limit can be further extended.
In actual applications, fire resistance tests of this material in industrial kilns, high-temperature pipeline insulation and other scenarios show that its surface temperature rise rate is much lower than that of traditional refractory bricks, effectively protecting the matrix structure. At the same time, its chemical stability can resist chemical erosion except strong alkali, fluorine and phosphate, ensuring long-term fire resistance in complex environments.
