【作者】 唐清富； 臧文成； 张军； 都有为；

【Author】 Tang Qingfu Zang Wencheng Zhang Jun Du youweiChinese Academy of Engineering Physics ,Mianyang, Sichuan 621900 National Laboratory of Solid State Microstructures ,Nanjing University, Nanjing 210093

【机构】 中国工程物理研究院； 南京大学固体微结构实验室；

【摘要】 介绍了一种制备W和WC纳米粉的新方法,自耗电极电弧蒸发-惰性气体冷凝制备W纳米微粒,W纳米微粒与C混合经1050℃1h热处理碳化制备WC纳米微粒。经透射电镜观测W和WC纳米微粒的颗粒尺寸分别为26～30nm和60～80nm。经X-射线衍射分析发现W纳米微粒中有约16.8%的氧化物(主要为W₁₈O₄₉),氧含量约为3.2%;WC纳米微粒中无W₂C过渡相和氧峰出现。根据W纳米微粒衍射峰半高宽,利用谢乐公式计算的不同气氛压力下制备的纳米微粒颗粒尺寸为19～23nm,颗粒尺寸基本与气氛压力的对数成正比,即:d∝lnP。更多还原

【Abstract】 The paper introduces a new technology preparing W and WC nano-particles. The W nano-particle is produced through evaporating consumable electrode and cooled by the inert gases. The WC nano-particles is prepared by heat-treating the mixture of the W and C particles for 1 hour in 1050℃. The morphology and crystal structure of the W and WC particles have been characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD) for the sample with average size of 20~30 nm and 60~80nm. The W nano-particles contain about 16.8% oxide (mainly W18O49), and the proportion of oxygen is about 3.2%, and there are no transition phases of W2C and oxygen peak through TEM characterizing. The size of the nano-particles are about 19~23nm with the different pressure of the atmosphere according to the Scherrer formula . The size has direct proportion with the pressure of atmosphere: d ∝ In P.更多还原