水热还原法制备车电极用W-Cu复合粉末的特性表征  

Characterization of W-Cu composite powder for vehicle electrode prepared by hydrothermal co-reduction method

作　　者：王巍 王军 张晓旭[2] WANG Wei;WANG Jun;ZHANG Xiao-xu(School of Automotive Engineering, Huanghe Jiaotong Uuniversity, Jiaozuo 454950, China;College of Material Engineering, He＇nan University of Science and Technology, Luoyang 471000, China)

机构地区：[1]黄河交通学院汽车工程学院,河南焦作454950 [2]河南科技大学材料工程学院,河南洛阳471000

出　　处：《粉末冶金工业》2018年第2期8-11,共4页Powder Metallurgy Industry

摘　　要：为了提高车电极的导电性,探索一种水热还原法制备的W-Cu复合粉末,并利用SEM、XRD等检测手段,对复合粉末的微观形貌以及物相组成进行特性表征,重点分析了水热反应后、煅烧后和还原后复合粉末的特性。结果表明：水热还原反应后,生成的沉淀物呈现大小不等的颗粒团聚状态,粉体颗粒呈球状,粒度在2.5μm左右,主要由CuWO4H2O与Cu2WO4（OH）2组成,表明水热反应阶段生成的产物具有明显的晶态结构;煅烧后粉末中存在大量的Cu WO4-x,成为由Cu WO4-x、CuO和WO3组成的复合氧化物;还原后的粉末有团聚现象以及细小的初始颗粒,还原的Cu颗粒对WO3的还原起到促进作用,最终形成了弥散分布、颗粒细小的WCu复合粉末。In order to improve the electrical conductivity of the vehicle electrode,the W-Cu composite powder was prepared by hydrothermal reduction method. The morphology and phase composition of the composite powder were characterized by SEM and XRD. The characteristics of the composite powder after hydrothermal reaction,calcination and reduction were analyzed. Results show that the precipitate shows a particle agglomeration state with different sizes after hydrothermal reduction reaction. The powders are spherical and the particle size is about2.5 μm,mainly composed of CuWO4H2O and Cu2WO4（OH）2,which indicates that the products produced in the hydrothermal reaction stage have obvious crystalline structure. There is a large amount of Cu WO4-xin the calcined powder,which is composed of Cu WO4-x,Cu O and WO3. The reduced powder has agglomeration phenomenon and small initial particles. The reduced Cu particles play a catalytic role to the reduction of WO3,finally the W-Cu composite powder with dispersed distribution and fine particles are formed.

关 键 词：W-Cu复合粉末 水热还原法 特性 颗粒尺寸分布 

分 类 号：TF123[冶金工程—粉末冶金]