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Research on Synthesis of BN Fibers with Precursors Prepared by Wet Chemical Method

RONG Hua, QIU Tai, SHEN Chun-ying, LI Xiao-yun (College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China)  
A process was developed for making boron nitride (BN) fibers with the precursors prepared by wet chemical method, and with boric acid (H3BO3) and melamine (C3N6H6) as starting materials. The precursors and products synthesized wherefrom were analyzed by neutralization titration, IR, XRD and SEM. The results show that N content of BN fibers reach 53.46% when reaction temperature is 1 700℃, soaking time 3 hours and nitrogen flow 2.0 L/min. The precursors consist of B—N, N—H, C—O—C, —(B—N)—. The diameter of BN fiber is from 2 mm to 10 mm and length/diameter ratio from 30 to 40.
【Fund】: 国防化工新材料重点科研项目
【CateGory Index】: TQ343.7
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