Author/Authors :
Dai، نويسنده , , Jun and Xu، نويسنده , , Liqiang and Fang، نويسنده , , Zengli and Sheng، نويسنده , , Daopeng and Guo، نويسنده , , Qingfeng and Ren، نويسنده , , Zeyu and Wang، نويسنده , , Kang and Qian، نويسنده , , Yitai، نويسنده ,
Abstract :
Straight boron nitride nanotubes (BNNTs) with pure hexagonal phase were conveniently prepared by heating the mixture of Mg(BO2)2 · H2O, NH4Cl, NaN3 and Mg powder in an autoclave at 600 °C for 20–60 h. These BNNTs had diameters mainly ranging 30–300 nm and lengths up to ∼5 μm, and a majority of them had at least one closed end. Besides the traditional end tips, additional cone-like tips were frequently found to be attached on the BNNTs. The effects of temperature, reactants and the possible mechanism of the catalytic formation of the BNNTs are discussed.
