Eu、Nd、Y稀土掺杂CuAlO_2纳米粉末制备及相组织研究  

Synthesis and phase-structure of(Eu,Nd,Y)-doped CuAlO_2 nanopowder

作　　者：麦海翔 谢致薇[1] 徐继承[1] 胡典禄 杨元政[1] 陈先朝[1] 何玉定[1] 

机构地区：[1]广东工业大学材料与能源学院,广州510006

出　　处：《功能材料》2015年第17期17076-17081,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50971046)

摘　　要：采用柠檬酸络合的无机盐溶胶-凝胶法制备稀土掺杂铜铁矿结构的CuAlO2粉末,掺杂元素M为稀土Eu、Nd、Y。用DSC-TGA、X射线衍射仪、紫外-可见光分光光度计等测试方法分别对掺杂CuAl1-x MxO2粉末的形成过程、物相结构、光学性能等进行研究。结果表明,稀土掺杂前驱体粉末经950℃煅烧后形成CuAlO2相;经1 100℃保温4h的煅烧后,粉末相组成取决于稀土掺杂量,当稀土元素M(Eu、Nd和Y)的掺杂量为0.5%时,试样由CuAlO2主相和少量CuO杂相组成,当掺杂量≥1%时,由CuAlO2主相、少量CuO和MAlO3杂相组成,YAlO3杂相峰强度较低。提高煅烧温度有利于掺杂元素的溶入,生成CuAl1-xMxO2纯相,但提高到1 150℃时CuAlO2分解;Eu掺杂量<1%时,掺杂样品光学带隙增大,电阻率减小,光电性能得到改善。The powders of rare earth element M(Eu,Nd,Y)doped CuAlO2 were synthesized by inorganic sol-gel method.Formation process of doped CuAlO2,phase structure,optical properties were studied by DSC-TGA,X-ray diffraction and UV-Vis spectrophotometer.The results showed that the rare earth doped CuAlO2 phase can be formed at 950℃.After treated at 1 100℃for 4h,phase composition of the powders was dependent on doping content.The 0.5% doped powder was composed of main phase CuAlO2 and a small amount of CuO phase.When the doping content was greater than or equal to 1%,the doped powder was composed of main phase CuAlO2,a small amount of CuO and MAlO3 phase.Diffraction peak intensity of YAlO3 phase was the lowest among EuAlO3,NdAlO3 and YAlO3phase.Higher treatment temperature was favorable to solution into the CuAlO2 lattice of the doping elements and formation of CuAl1-x MxO2 phase.CuAlO2 decomposes at1 150 ℃.When the doping content of Eu was less-then 1%,The optical band gap increased,the resistivity decreased and the photoelectric performance improvemented.

关 键 词：CuAlO2 稀土掺杂 相结构 光电性能 

分 类 号：TB34[一般工业技术—材料科学与工程]