In this work, WMo nanopowders were prepared by sol-gel synthesis combined with hydrogen reduction. The phase distribution of the powders with calcination and reduction at different temperatures was analyzed to figure out the effect of temperature on the reaction process. The calcined powders were further analyzed by thermogravimetric analysis (TGA) and differential thermal analysis (DSC). The phase composition, grain size and powder morphology of the resulted WMo nanoparticles have been characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM). The precursor calcined at 450 °C consisted of W_0.4Mo_0.6O₃ and MoO₃ phases which can be completely reduced to be pure WMo nanopowders with an average grain size of 20–40 nm at a low temperature of 700 °C for 1 h. The grain growth characteristics of the WMo nanopowders were investigated by analyzing the compacts annealed at temperatures ranging from 950 °C to 1400 °C for different time periods. The grain growth mechanism and the activation energy (Q_g = 220 ± 21 kJ/mol) of WMo nanoparticles was also obtained.

在这项工作中，WMo 纳米粉体是通过溶胶-凝胶合成结合氢还原制备的。分析了不同温度下煅烧和还原的粉末的相分布，以了解温度对反应过程的影响。通过热重分析 (TGA) 和差热分析 (DSC) 进一步分析煅烧粉末。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、能谱仪 (EDS) 和透射电子显微镜 (TEM) 表征了所得 WMo 纳米粒子的相组成、晶粒尺寸和粉末形态。在 450 °C 下煅烧的前驱体由 W _0.4 Mo _0.6 O ₃和 MoO _{3 组成}在 700°C 的低温下保持 1 小时，这些相可以完全还原为平均晶粒尺寸为 20-40 nm 的纯 WMo 纳米粉末。通过分析在 950 °C 至 1400 °C 的温度范围内不同时间段退火的压块，研究了 WMo 纳米粉末的晶粒生长特性。 还获得了 WMo 纳米颗粒的晶粒生长机制和活化能 (Q _g = 220 ± 21 kJ/mol)。