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highly efficient synthesis of boron nitride nanotubes by catalytic chemical vapor deposition of boron/nickel containing precursors

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Journal of Materiomics 2022年第6期8卷 1199-1204页

作者： Heng Wang Haoran Yang Yongzhi Peng Yulin Zheng Dongying Huang Pu Hu Yawei Li Zhengyi Fu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Key Laboratory of Green Chemical Engineering Process of Ministry of EducationWuhan Institute of TechnologyWuhan430205China State Key Laboratory of Advanced Technology for Materials synthesis and Processing Wuhan University of TechnologyWuhan430070China The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan430081China

High-purity and high-yield boron nitride nanotubes with large aspect ratio were prepared by a facile two-step process,including the synthesis of boron/nickel containing precursors by precipitation reactions and subsequent thermally catalytic chemical vapor deposition *** influence of catalyst content and annealing temperature on the phase composition and microstructure of the products were *** results show that it is difficult to exert the catalytic effect of nickel-based catalyst at low temperatures(highly crystalline boron nitride nanotubes with a length of more than 50 mm and a diameter of 50 nm are *** content of catalyst in the precursor mainly affects the morphology of the boron nitride *** the content is too low,it is easy to form boron nitride particles;while high catalyst content can easily lead to catalyst aggregation and form a submicron one-dimensional boron nitride with unregular *** on microstructural evolutions,phase changes,and thermodynamic analysis,the vapor-liquid-solid(V-L-S)growth mechanism of the tip growth mode dominates the formation of boron nitride nanotubes has also been verified.

关键词： Boron nitride nanotubes highly efficient synthesis Boron/nickel containing precursors Growth mechanism

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