Fibrous boron carbide prepared from electrospun condensed boric acid-poly(vinyl alcohol) product fibers

抄録

Fibrous crystalline boron carbide (B₄C) was fabricated by carbothermal reduction starting from electrospun condensed boric acid (H₃BO₃)-poly(vinyl alcohol) (PVA) product fibers. The addition of hydrochloric acid to a H₃BO₃-PVA/dimethyl sulfoxide solution resulted in electrospinnability of the solution; thus, condensed H₃BO₃-PVA product fibers were prepared by electrospinning. The fibrous B₄C precursor was prepared by the thermal decomposition of the electrospun H₃BO₃-PVA product fibers in air. The fibrous B₄C was obtained by heat treatment of the fibrous precursor at 1400 °C in an Ar flow. The structure of fibers in fibrous B₄C consisted of connected particles.