What are the factors that affect the performance of ceramic fibers

The raw materials used for ceramic fibers include coke gems, coal gangue, alumina powder, quartz sand, zircon sand, and the like. The main components, impurities, humidity, and masonry methods in ceramic fibers have a great influence on the temperature's tolerance. In general, high-purity, high-aluminum, and zirconium-containing products have low levels of impurities, have the highest temperature tolerance, while the common types have the lowest temperature tolerance.

The effect of humidity on the properties for ceramic fibers is also not negligible. The presence of moisture increases the thermal conductivity of the ceramic fiber. If the moisture in the fiber freezes into ice, its thermal conductivity will further Increase. Therefore, for thermal insulation engineering, the water content of the fiber material should be strictly controlled.

In general, ceramic fibers are used in the atmosphere, and a large amount of air is filled in the pores of the fiber material to provide heat insulation. In some special cases, the fiber material needs to be used in protective gas, hydrogen, carbon monoxide, carbon dioxide, hydrocarbons, and inert gases, the thermal conductivity of the fiber material changes greatly. Fiber material's thermal conductivity in these gases is higher than in air.

The masonry method also has a certain influence on the temperature of the ceramic fiber. The fiber using the stacking method has a thermal conductivity about 50 °C higher than that of the tile method.

The effect of the working system the ceramic fiber' temperature is also not negligible. The working system is divided into continuous and intermittent, and the operating temperature of the intermittent-working kiln is 50 °C higher than that of the continuous working kiln.

Fuel has a significant effect on the temperature of ceramic fibers' use. Some fuels produce many metal oxides during combustion, which react with high temperature oxides in the fiber material at high temperatures, which can damage the final structure of the fiber.