Preparation of boron nitride fibers with the use of hydrated cellulose. II.Nitriding hydrated cellulose fibers impregnated with ammonium borate

摘要

The effect of preliminary heat treatment (PHT) ofhydrated cellulose fibers impregnated with an ammoniumtetraborate solution on the composition and structure of nitridedproducts was studied. The PHT conditions which upon subsequentnitriding led to the formation of C-BN fibers with a coating of BN,and also hollow and solid BN fibers, were determined.