The high temperature resistance of ceramic fiber cotton is mainly reflected in the following aspects:

I. High temperature stability

Ceramic fiber cotton can maintain stable physical and chemical properties for a long time in high temperature environment. Its main components include alumina (Al₂O₃) and silica (SiO₂), which endow it with excellent fire resistance and thermal stability. For example, the working temperature of standard ceramic fiber cotton can reach 1260℃, while the high-purity type and zirconium-containing type have higher temperature resistance.

II. Low thermal conductivity

The thermal conductivity of ceramic fiber cotton is low, usually between 0.03 and 0.18 W/(m k). This means that it can effectively prevent the transfer of heat, even in high temperature environment, it can maintain the heat insulation effect. This low thermal conductivity makes it an ideal energy-saving material.

III. Thermal shock resistance

Ceramic fiber cotton has good thermal shock resistance and can maintain structural integrity under rapid temperature changes. For example, in the process of starting and stopping an industrial furnace, ceramic fiber cotton can withstand the sharp change of temperature without being damaged.

IV. Chemical stability at high temperature

Ceramic fiber cotton can still maintain good chemical stability at high temperature and resist corrosion by acid, alkali and other chemicals. This characteristic makes it suitable for high temperature equipment in chemical industry and petrochemical industry.

V. Physical properties at high temperature

Ceramic fiber cotton can still remain soft and have good elasticity at high temperature. For example, some grades of ceramic fiber cotton can still maintain good thermal insulation performance at high temperature of 1200℃. In addition, a dense oxide layer will be formed on the fiber surface to further provide thermal protection.

VI. Fire resistance test data

Classification temperature: the classification temperature of ceramic fiber cotton is usually around 1260℃, and some high-purity and zirconium-containing products can reach 1400℃.

Melting point: Its melting point is usually above 1700℃.

Linear shrinkage: at high temperature, the linear shrinkage of ceramic fiber cotton is low, for example, when it is used for 24 hours at 1260℃, the permanent linear shrinkage usually does not exceed 3.5%.

VII. Application examples

Ceramic fiber cotton is widely used in high-temperature industrial equipment, such as heating furnace in metallurgical industry, high-temperature reaction equipment in petrochemical industry and boiler in electric power industry. For example, a German steel manufacturer used ceramic fiber cotton for heat insulation annealing furnace. As a result, energy consumption was reduced by 25% and furnace life was prolonged by 15%.

To sum up, the high-temperature resistance of ceramic fiber cotton is mainly reflected in its high-temperature stability, low thermal conductivity, thermal shock resistance, chemical stability and good physical properties, which make it have a wide application prospect in the high-temperature industrial field.