H_2O_2氧化水热晶化法制备超细钨粉  

Synthesis of Tungsten Nano-particles Prepared by H_2O_2 Oxidation Hydrothermal Crystallization Method

作　　者：韩煜娴[1] 丘泰[1] 宋涛[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《有色金属（冶炼部分）》2008年第4期37-40,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国防科工委经费资助项目

摘　　要：通过H2O2氧化工业级钨粉颗粒制备出纳米级WO3粉体，采用两段还原法对所得的产物进行氢还原后得到超细钨粉。用XRD、SEM、BET等对所得产物进行了一系列的表征。结果表明：工业级钨粉经氧化水热晶化处理后所得产物为单斜相WO3，平均粒径约为60nm；将制得的WO3在氢气氛下还原，800℃下保温45min后得到颗粒分布较窄、平均粒径约150nm的立方相钨粉。当还原温度升高至900℃时，所得的钨粉颗粒明显长大，部分粒径长大至2～3μm，但颗粒的球形度更好。H2O2 oxidation hydrothermal crystallization method was employed for the preparation of nano-WO3 and ultra-fine tungsten powder was prepared after deoxidized with H2 using bisection method. The products were characterized by XRD, TG/DSC and BET, respectively. The results show that after disposing the industrial tungsten powder with hydrothermal crystallization method, the product is monoclinic WO3. Its average particle size is about 60 nm. When deoxidized with H2 and heated at 800℃ for 45 min, WO3 turned into cubic tungsten powder. Its granularity distribution is narrow and its average particle size is about 150nm. When the temperature ascends to 900℃, the tungsten powder prepared grows up, part of its diameter ascends to 2-3 nm, hut its degree of sphericity becomes better.

关 键 词：氧化水热晶化法 三氧化钨 超细钨粉 

分 类 号：TF123.121[冶金工程—粉末冶金]