Zhao Panchao, Yi Wei, Cao Qigao, Zhang Bosheng, Chen Kunkun, Dang Rui, Chen Jialin
Northwest Institute for Nonferrous Metal Research, Xian, 710000, China.
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Institute of Precious Metals, Kunming, 650106, China.
Nanoscale Res Lett. 2019 Feb 26;14(1):68. doi: 10.1186/s11671-019-2904-3.
Nanoscale tungsten (W) powder is used in some special materials. In this study, a hollow superstructure W powder consisting of nanoparticles was synthesized by spray drying combined with two-step calcination from commercial (NH)WO·6HO. The high-pressure gas (HPG) was the significant factor in spray drying process, which affect the BET surface area and average particles size of the spray-dried powders. The detailed influences of calcined steps and calcination temperature in the microstructure and average particles size of final W particles were investigated. The size distribution of as-synthesized nanoscale W particles with hollow superstructure was from 40 to 200 nm, and the average size was about 100 nm. The as-synthesized W powder shows good sintering properties. It should be noted that the powder technology in this study can be used to synthesize other powders with high-performance requirements. .
纳米级钨（W）粉末用于一些特殊材料中。在本研究中，以市售的(NH₄)₂WO₄·6H₂O为原料，通过喷雾干燥结合两步煅烧合成了由纳米颗粒组成的中空超结构W粉末。高压气体（HPG）是喷雾干燥过程中的重要因素，它影响喷雾干燥粉末的比表面积和平均粒径。研究了煅烧步骤和煅烧温度对最终W颗粒微观结构和平均粒径的详细影响。合成的具有中空超结构的纳米级W颗粒的尺寸分布为40至200nm，平均尺寸约为100nm。合成的W粉末表现出良好的烧结性能。需要注意的是，本研究中的粉末技术可用于合成其他具有高性能要求的粉末。
