Boron nitride fibers

Hexagonal BN can be prepared as fibers, structurally similar to carbon fibers, sometimes called "white carbon fiber." They can be prepared by the thermal decomposition of extruded borazine fibers by adding boron oxide in nitrogen at 1800 °C. The material also arises by the thermal decomposition of cellulose fibers impregnated with boric acid or ammonium tetraborate in an atmosphere of ammonia and nitrogen above 1000 °C. Boron nitride fibers are used as reinforcement in composite materials, with


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