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首页> 外文期刊>CERAMICS INTERNATIONAL >Synthesis of hexagonal boron nitride fibers within two hour annealing at 500 degrees C and two hour growth duration at 1000 degrees C
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Synthesis of hexagonal boron nitride fibers within two hour annealing at 500 degrees C and two hour growth duration at 1000 degrees C

机译：在500摄氏度退火两小时内以及在1000摄氏度生长两小时内合成六方氮化硼纤维

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摘要

Several advantageous features like low density, large surface area, high porosity and tight pore size make the nanofiber suitable for a wide range of applications from medical to consumer products and industrial to high-tech applications. Present study concerns the synthesis of hexagonal boron nitride fibers (phi=70-350 nm) from a mixture of Boron, Magnesium oxide and Iron oxide powders via a simple CVD technique. A relatively long annealing and growth duration of two hours at 500 degrees C and 1000 degrees C, respectively were utilized in this synthesis. The synthesized samples seem to have the BNFs of irregular curved human hair-like morphologies in lower resolution and solid cylinder-like structures in high resolution transmission electron microscopy. The presence of Boron and Nitrogen in the synthesized BNF's sample were confirmed via the B 1s peak at 190.7 eV and N 1s peak at 398.3 eV in the XPS survey whereas a major peak at 1370 (cm(-1)) in the Raman spectrum corresponds to the vibration of E-2g mode in h-BN. The sharp peaks in the XRD pattern verify the h-BN phase and highly crystalline nature of the synthesized BNFs. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
机译：低密度，大表面积，高孔隙率和紧密的孔径等多项有利功能使纳米纤维适用于从医疗到消费产品以及工业到高科技应用的广泛应用。本研究涉及通过简单的CVD技术由硼，氧化镁和氧化铁粉末的混合物合成六方氮化硼纤维（phi = 70-350 nm）。在该合成中分别利用了相对较长的退火和在500℃和1000℃下两个小时的生长持续时间。合成的样品在低分辨率下似乎具有不规则弯曲的人发状形态的BNF，而在高分辨率透射电子显微镜下具有固态的圆柱状结构。通过XPS调查中的190.7 eV处的B 1s峰和398.3 eV处的N 1s峰确认了合成BNF样品中硼和氮的存在，而拉曼光谱中的1370（cm（-1））主峰对应h-BN中E-2g模式的振动。 XRD图谱中的尖峰证实了合成的BNF的h-BN相和高度结晶的性质。 （C）2016 Elsevier Ltd和Techna Group S.r.l.版权所有。

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