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采用高温固相法制得稀土掺杂的镥酸钡 (Ba3Lu4O9) 荧光粉.采用铕离子 (Eu3+) 为结构探针离子, 研究了基质中稀土离子所处格位的对称性.在323～573℃温度范围内和980nm的激发下, 观察到强的上转换发光绿光和红光发射, 分别对应于Er3+的2H11/2→4I15/2, 4S3/2→4I15/2和4F9/2→4I15/2跃迁.研究了不同温度下铒/镱 (Er3+/Yb3+) 共掺Ba3Lu4O9的上转换发光.并对2 H11/2和4S3/2能级的荧光强度比进行了分析, 建立了上转换特性与温度的函数关系, 在573℃时最大灵敏度达到0.0067℃-1.结果表明, 研究的荧光材料可应用于温度传感器.“,”Rare earth doped Ba3Lu4O9 phosphors were prepared via the conventional solid-sate reaction method.Eu3+ was used as a structural probe ion to elucidate the local site symmetry around rare earth ions.Intense green and red upconversion luminescence was observed in the Er3+ /Yb3+ codoped Ba3Lu4O9 phosphor under 980 nm excitation, which were attributed to 2H11/2→4I15/2, 4S3/2→4I15/2 and 4F9/2→4I15/2 transitions of Er3+ ions, respectively.The fluorescence intensity ratio (FIR) of two thermally-coupled levels (2 H11/2 and 4 S3/2) of Er3+ ions was studied as a function of temperature in the range of 323～573℃and the maximum sensor sensitivity was found to be 0.0067℃-1 at573℃.These results suggested that the present phosphor material was a promising candidate for optical temperature sensors.