Alpha-alumina fibers Nextel

Other manufacturers have modified the production technique to reduce the diameter of the alpha-alumina fibers that they have produced. This reduction of diameter has an immediate advantage of increasing the flexibility and hence the weaveability of the fibers. Mitsui Mining and 3M Corporation have introduced polycrystalline fibers, the Almax and the Nextel 610 fibers with diameters of 10 p.m, that is half the diameter of Fiber FP. 

The Nextel 720 contains the same alumina to silica ratio as in the Altex fiber, that is around 85% wt AI2O3 and 15 % wt Si02- The fiber has a circular cross section and a diameter of 12 im. The sol-gel route and higher processing temperatures have induced the growth of alumina rich mullite and alpha alumina. Unlike other alumina-silica fibers the Nextel... 

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