Facile synthesis of hexagonal boron nitride fibers with uniform morphology

摘要

Hexagonal boron nitride (h-BN) fibers were synthesized via the polymeric precursor method using boric acid (H_3BO_3) and melamine (C_3H_6N_6) as raw materials. The precursor fibers were synthesized by a water bath and BN fibers were prepared from the precursor at 1600℃ for 3 h in flowing nitrogen atmosphere. The products were characterized by X-ray powder diffraction, Fourier transformation infrared spectroscopy, thermogravimetry and scanning electron microscopy. The results showed that h-BN fibers with uniform morphology were successfully fabricated. The well-synthesized fibers were 1-2 μm in diameter and 200-500 μm in length.