Abstract: In this paper, boron nitride precursor polymer was synthesized by a certain ratio of boric acid and melamine,The boron nitride precursor polymer was dissolved in formic acid solution, and the boron nitride precursor was spinned in 23 kV,15 cm of the distance. And the fiber was uniform. The synthesis of precursor polymer was placed in a muffle furnace and then was heated to 800 ℃ according to 10 ℃/min of heating rate, and was held for a certain time, boron nitride product was made. Its colour is white and hardness is larger. The performance characteristics of the product were tested by using the Fourier transform infrared spectrometer, TG-DSC thermogravimetric analyzer and scanning electron microscope.

Key words: boric acid;melamine;precursor of boron nitride;nitride/polymer