Y_2O_3/Cu复合粉末的制备研究  

Synthesis of Y_2O_3/Cu Composite Powders

作　　者：储爱民[1,2] 王志谦 王龙 郭晨光 刘文辉 

机构地区：[1]湖南科技大学高温耐磨材料及制备技术湖南省国防技术重点实验室,湖南湘潭411201 [2]湖南科技大学材料科学与工程学院,湖南湘潭411201

出　　处：《矿冶工程》2017年第6期109-112,共4页Mining and Metallurgical Engineering

基　　金：国家自然科学基金(51475162);湖南省自然科学基金(14JJ2093);湖南科技大学大学生科研创新计划项目(SYZ2017071);湖南省大学生研究性学习和创新性实验计划项目(201610534004)

摘　　要：以硝酸钇、硝酸铜、葡萄糖和尿素为原料,结合低温燃烧合成和氢还原法,制备出Y_2O_3/Cu复合粉末。运用X射线衍射仪和扫描电镜等测试手段对复合粉末的物相和微观形貌等进行了表征;测试了复合粉末的热氧化性能。结果表明,前驱物具有高比表面积(8.5 m^2/g)和高反应活性,还原反应速率快,在500℃通氢气保温1 h可实现完全还原,制备的Y_2O_3/Cu复合粉末由尺寸约为200 nm的近球形颗粒组成,比表面积达到了11.6 m^2/g,Cu氧化后生成的CuO熔化和分解温度相比标准的低200℃左右。With yttrium nitrate,cupric nitrate,glucose,and urea as raw materials,Y2O3/Cu composite powders were synthesized by adopting a combined method consisting of low temperature combustion synthesis and hydrogen reduction.The phase composition and microstructure of Y2O3/Cu composite powders were characterized with X-ray diffraction,scanning electron microscopy,and the thermal oxidation behavior of Y2O3/Cu composite powders under atmospheric condition was also tested. Results indicated that the prepared precursor with high specific surface area（8. 5 m2/g）exhibited high reaction activity and high reduction reaction rate. A completed hydrogen reduction reaction was realized with the temperature held at 500 ℃ for 1 h. The prepared Y2O3/Cu composite powders consisted of well-distributed particles with an average size around 200 nm. Its specific surface area was up to 11.6 m2/g. For CuO powders that was generated after Cu oxidation,both the melting temperature and decomposition temperature were 200 ℃ lower compared to the standard sample.

关 键 词：铜基复合材料 Y2O3/Cu复合粉末 氢还原 前驱物 低温燃烧合成 

分 类 号：TB321[一般工业技术—材料科学与工程]