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Li₃N在合成BN反应中的作用研究

Effect and Mechanism of Li₃N in the Synthesis of BN

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【Author】 MU Qi-yong~1, XU Xiao-wei~1, FAN Hui-li~2, BAO Jun-ping~1, LI Yu-ping~1, XIN Chun-yu~3 (1. Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083,China;?2. Applied Science School, University of Science and Technolog Beijing, Beijing 100083, China; 3. Graduate School of Shandong University,Jinan 250100,China)

【机构】北京科技大学材料科学与工程学院；北京科技大学应用数理学院；山东大学研究生院北京100083；北京100083；济南250100；

【摘要】金属Li在500℃同N2反应得到的Li3N,对高温高压下hBN向cBN的转变,常压高温下B4C与NH4Cl的反应有催化作用;还可以在溶剂热方法中作为与BBr3反应生成hBN和cBN的氮源。本文分析了Li3N在上述三种反应中的作用机理,并提出用极化模型解释Li3N在常压下的催化机制和在溶剂热方法中的反应机制的观点。更多还原

【Abstract】 Li₃N obtained from Li and N₂ at 500℃ shows catalytic effect on the transformation of cBN from hBN at high temperature and high pressure,and so does in the reaction of B₄C and NH₄C1 at normal pressure and high temperature; besides it can be used as nitride resources reacting with BBr₃ synthesizing hBN and cBN in solvent method. This paper also analyzed the reaction mechanism of Li₃N in above three functions, and interpreted its catalytic function with polarization model at ambient pressure, furthermore explained the reason for using Li₃N as nitrides.更多还原