Ordinary ceramic fiber is also called aluminum silicate fiber, because one of its main composition is alumina, and aluminum oxide is the main ingredient of porcelain, so it names ceramic fiber. Adding zirconia or chrome oxide can further increase the temperature of ceramic fiber. Ceramic fiber products refer to those mechanicals which use ceramic fiber as raw materials through processing with light weight, high temperature resistance, good thermal stability, low thermal conductivity, low heat and mechanical shock resistance and other advantages. Those products are dedicated to all kinds of high temperature, pressure and easily worn environment. Ceramic fiber is a kind of excellent refractory ceramic fiber products. It has light weight, high temperature resistant, small heat capacity, well thermal insulation performance, non-toxic and other advantages. So far, China's now ceramic fiber manufacturers are more than two hundred, but the manufacture technique with temperature of or under 1425 ℃ (including zirconium fiber) only has spun fiber blanket and blown fiber blanket.