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 M x O2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1100℃保温4 h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 M AlO3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－ x M x O2纯相，但提高到1150℃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 4 h ,phase composition of the powders was depend‐ent 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 YAlO3 phase .Higher treatment temperature was favorable to solution into the CuAlO2 lattice of the doping elements and formation of CuAl1 - x M x O2 phase .CuAlO2 decomposes at 1 150 ℃ .When the doping content of Eu was less‐then 1% ,The optical band gap increased ,the resistivity de‐creased and the photoelectric performance improvemented .
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