Ceramic fiber is a fibrous lightweight refractory material with the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical vibration resistance. Under the background of stricter industrial energy conservation and environmental protection regulations in recent years, ceramic fibers, which can save 10-30% energy compared with traditional refractory materials such as insulating bricks and pouring materials, have been widely used in China, and their development prospects are very promising. .

With the popularization and application of zirconium-containing fibers and polycrystalline alumina fibers, the operating temperature has increased to 1000-1400 °C, but due to product quality defects and backward application technology, the application fields and application methods are limited. For example, polycrystalline alumina fibers cannot be made into fiber blankets, and the product specifications are single, mainly loose cotton and fiber blocks. Although the use temperature is increased, the strength is very poor, which limits the scope of use and shortens the service life. At present, only a few domestic manufacturers have achieved breakthroughs in technology, and mass production of polycrystalline alumina fiber blankets has been achieved.

Ceramic fiber plays an important role in thermal insulation and refractory in the high temperature industry, but at the same time, it also has major disadvantages in production. It is inhalable and has relative harm to the environment and human body.