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 

作者机构：Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou341000China Jiangxi Advanced Copper Industry Research InstituteYingtan335000China Naional Rare Earh Functional Material Innovation CenterJiangxi Universiy of Science and TechnologyGanzhou341000China Engineering Research Center of Tungsten Resources High-Efficiency Development and Application Technology of the Ministry of EducationJiangxi University of Science and TechnologyGanzhou341000China 

出 版 物：《Tungsten》 (钨科技（英文）)

年 卷 期：2023年第5卷第4期

页      面：539-547页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

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) 

主　　题：Tungsten powder Hydrogen reduction Yttrium oxide 

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 *** mechanism of the influence of Y_(2)O_(3)on the growth of WO_(2.72)and the particle refinement of tungsten powder is *** 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 *** 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 ***,Y_(2)O_(3)can effectively inhibit the growth of tungsten particles in the hydrogen reduction ***,The Y_(2)O_(3)-doped tungsten powders have finer particles and a narrower particle size distribution range than the undoped *** average particle diameter of 0.3 wt.%Y_(2)O_(3)doping tungsten powder was in the range of 90-120 nm.