热化学共还原法制备W包覆Cu纳米复合粉体(英文)  

Nano-composite Powder of Tungsten Coated Copper Produced by Thermo-chemistry Co-reduction

作　　者：李君强[1] 陈文革[1] 陶文俊[1] 邵菲[1] 丁秉均[2] 

机构地区：[1]西安理工大学,陕西西安710048 [2]西安交通大学,陕西西安710049

出　　处：《稀有金属材料与工程》2012年第12期2091-2094,共4页Rare Metal Materials and Engineering

基　　金：The National Natural Science Foundation of China(50834003)

摘　　要：采用两种粒径的氧化铜粉末和粒径为1.5μm的三氧化钨粉末来制备高纯度的CuWO4粉末,分别通过控制CuWO4粉末在360和750℃两个阶段的氢气还原作用,制备出钨包覆铜纳米复合粉体。复合粉体的微观形貌,组织结构与颗粒尺寸采用扫描电子显微镜(SEM),X线衍射分析仪(XRD)和透射电子显微镜(TEM)进行测试,激光粒度测试仪(LPSA)用来测试CuWO4粉末的粒度。由小粒度CuWO4粉末制备出的钨包覆铜纳米复合粉体的钨包覆层厚度小,氢气还原制备的钨包覆铜复合粉体的平均粒径约50nm。Two kinds of copper oxide with different particle sizes and 1.5 μm tungsten trioxide powder were employed to prepare the high-purity CuWO4 powder. By two stage hydrogen-reduction of the CuWO4 at 360 and 750 respectively and continuously, nano-composite powder of tungsten coated copper was synthesized. Micro-morphology, crystallization-components and grain-size of the products were investigated by scanning electron microscope （SEM）, X-ray diffract meter （XRD） and transmission electric microscope （TEM） and laser particle size analyzer （LPSA） was also applied to measure the particle-size of CuWO4 . The W film thickness of nano-composite powder synthesized by smaller-sized CuWO4 is thinner than that made from bigger-sized CuWO4 . The average particle size of nano-composite powder of tungsten coated copper is about 50 nm under the two-stage hydrogen reduction.

关 键 词：热化学共还原 包覆粉体 纳米 W-CU 

分 类 号：TB383.1[一般工业技术—材料科学与工程]