Alumina fiber thermal conductivity, heat capacity and heat shrinkage rate is low. Long term use temperature of 1300 ~ 1400 degrees C, higher than the ordinary aluminum silicate fiber (1000 ~ 1100 degrees C). It has good chemical stability, can be used in acidic environment, oxidizing atmosphere, reducing atmosphere and vacuum conditions, the alkaline environment also has a certain corrosion resistance, but the corrosion of lead vapor and five oxidation of two vanadium. This fiber is mainly used for iron and steel industry and all kinds of heat treatment furnace, ceramic firing cracking furnace kiln, petroleum chemical industry, heat insulating lining of furnace combustion, energy-saving effect of significantly. The batch operation of the kiln can greatly increase product output. In addition, it can be used as a catalyst carrier in the chemical industry, known as the alumina carrier. Heat insulating materials for nuclear reactors and space shuttle, reinforced materials for light alloys, etc..

High temperature industrial furnace energy-saving effect significant alumina short fiber has outstanding resistance high temperature performance, mainly used as insulating refractory material, in metallurgical furnace, sintering furnace or other high temperature furnace for protective lining insulation materials. Because of its low density. The thermal insulation is good, the heat capacity is small, not only can reduce the furnace body mass, but also can improve the temperature control precision, and the energy-saving effect is remarkable. Alumina fiber in the high temperature furnace using energy-saving effect than general refractory brick or high temperature paint good, energy-saving far outweigh the amount of heat loss, the reason is not only because of the decrease of heat loss, more important is strengthen the furnace gas to the furnace wall of convective heat transfer, makes the furnace wall can be fold more heat, through the national emblem to the material, thereby improving the material heating speed and the production capacity.

Environmental protection and recycling applications have a bright spot

Alumina fibers can be used in environmental protection and recycling technology because of their good chemical resistance. Such as the burning of waste electronic equipment, after years of running, alumina fiber still shows its excellent resistance to various furnace harmful corrosion performance for automobile exhaust equipment for ceramic lining and its characteristics is a stable structure. Saffil alumina fiber can be used for aluminum alloy, it is the advantage of the temperature rise when the expansion of smaller, less than pure alloy about 25%, so that the piston and the cylinder is good, can save fuel.

Enhance the performance of the composite material obvious advantages

Due to the good wettability between alumina fiber and metal matrix, the mechanical properties, wear resistance and hardness of the composites are improved, and the thermal expansion coefficient is decreased. Alumina fiber reinforced metal matrix composites have been used in automotive piston groove and rotary gas compressor blades. And because alumina fiber and resin had good adhesion to the substrate than glass fiber elastic large, than carbon fiber with high compression strength, so alumina composite resin material is gradually in some areas replace glass fiber and carbon fiber. Especially in sports goods, can be made of a variety of color high-intensity fishing rod, golf, ski, tennis racket, etc..

Alumina fiber reinforced metal matrix composite material is mainly used in mechanical parts with high load and high temperature high speed rotating parts and requirements of lightweight, high power components, such as automotive connecting rod, drive rod, brake piece parts and helicopter transmission device. Recently, some researchers also began to be used for thermonuclear reactor cooling heat exchanger lining.