前驱体碳化/氮化法制备纳米氮化钒粉末

SYNTHESIS OF VANADIUM NITRIDE (VN) NANOPOWDERS BY CARBURIZING AND NITRIDING OF THE PRECURSOR

以偏钒酸铵和纳米碳黑为原料,先制备前驱体粉末,再将前驱体粉末在一定温度下碳化/氮化得到纳米氮化钒(VN)粉末。采用X射线衍射仪(XRD)、扫描电镜(SEM)和透射电镜(TEM)对反应产物的相组成和微观结构进行了分析。结果表明:相组成单一的VN粉末可以在1050～1100℃、1h条件下获得;1100℃时VN粉末显示球形或类球形,主要由20～50nm的颗粒组成。

The precursor powder originated from the mixture of ammonium vanadate （NH4VO3） and nanometer carbon black. Vanadium nitride （VN） nanopowders could be prepared by carburizing and nitriding of the precursor at a certain temperature. The phase compositions and microstructures of the products were analyzed by X-ray diffractometer （XRD）, scanning electron microscope （SEM） and transmission electron microscope （TEM）. The results show that the single phase VN powders can be synthesized at 1050- 1100℃ for lh, and the powders prepared at 1100℃ are mainly composed of 20- 50nm spherical or near- spherical particles.