Effect of Y_(2)O_(3)doping on preparation ultrafine/nano-tungsten powder and refinement mechanism  

作　　者：Dong-Dong Lv Yu Sun Jian-Bo Zhang Sheng-Da Guo Bai-Xiong Liu 

机构地区：[1]Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou,341000,China [2]Jiangxi Advanced Copper Industry Research Institute,Yingtan,335000,China [3]Naional Rare Earh Functional Material Innovation Center,Jiangxi Universiy of Science and Technology,Ganzhou,341000,China [4]Engineering Research Center of Tungsten Resources High-Efficiency Development and Application Technology of the Ministry of Education,Jiangxi University of Science and Technology,Ganzhou,341000,China

出　　处：《Tungsten》2023年第4期539-547,共9页钨科技（英文）

基　　金：financially supported by the Key project of Natural Science Foundation of Jiangxi Province(20202ACBL214012);the Postdoctoral Research Foundation of China(2020M682115);Jiangxi Province(2019KY29);the Natural Science Foundation of Jiangxi Education Department(GJJ200805);the Foundation Engineering Research Center of Tungsten Resources Highefficiency Development and Application Technology of the Ministry of Education(W-2021ZD001);the Foundation of Key Laboratory of Advanced Materials of Yunnan Province(2020KF004);the Foundation of Collaborative Innovation Center for Development and Utilization of Rare Metal Resources Co-sponsored by Ministry of Education and Jiangxi Province,(JXUST-XTCX-2022-04);the independent project of Jiangxi advanced Copper Industry Research Institute(ZL-202006)。

摘　　要：In this study,ultrafine/nano W-Y_(2)O_(3)composite powders were synthesized by spray drying,roasting and two-step hydrogen reduction using ammonium metatungstate and yttrium nitrate as raw materials.The mechanism of the influence of Y_(2)O_(3)on the growth of WO_(2.72)and the particle refinement of tungsten powder is discussed.The effect of Y_(2)O_(3)particles on the reduction behavior of tungsten powder was investigated using scanning electron microscopy to study the near surface morphology and X-ray diffraction for phase ID(composition)and crystal structural changes for the reduced powders at each step.The results show that the doping of 0.3 wt.%Y_(2)O_(3)can significantly increase the aspect ratio of WO_(2.72)in the first step of hydrogen reduction.Moreover,Y_(2)O_(3)can effectively inhibit the growth of tungsten particles in the hydrogen reduction process.Therefore,The Y_(2)O_(3)-doped tungsten powders have finer particles and a narrower particle size distribution range than the undoped powders.The average particle diameter of 0.3 wt.%Y_(2)O_(3)doping tungsten powder was in the range of 90-120 nm.

关 键 词：Tungsten powder Hydrogen reduction Yttrium oxide 

分 类 号：TG146.411[一般工业技术—材料科学与工程]