球磨法对不同基质上转换发光的影响

分别利用高温固相法和高能球磨法，在反应温度为1 100 ℃、反应时间为2 h的条件下合成了以Y₂O₃、La₂O₃、LiTaO₃为基质的双掺和三掺Tm³⁺、Er³⁺、Yb³⁺发光粉。XRD测试结果表明，高能球磨法制备的Y₂O₃、La₂O₃、LiTaO₃材料的相纯度高于高温固相法。用980 nm红外激光分别对两种合成方法制得的样品粉末进行发光性质的检测，结果表明高能球磨法制得样品的发光强度高于高温固相法样品。不同基质样品的上转换发光性质表现为：Tm³⁺、Yb³⁺掺杂呈蓝光；Er³⁺、Yb³⁺掺杂呈黄光；Tm³⁺、Er³⁺、Yb³⁺三掺样品的发光减弱，颜色可调。

Up-conversion for Different Substrate by Ball Milling Method

Up-conversion luminescence powders were synthesized by high-energy ball-milling (HEB) method and the conventional solid-state reaction (SSR) method. All the phosphors were sintered at 1 100 ℃ for 2 h. X-ray powder diffraction (XRD) shows that the HEB samples have higher phase purity and crystallinity compared with the SSR samples. Excited by 980 nm laser, the HEB samples show higher photoluminescence (PL) intensity. Tm³⁺, Yb³⁺co-doped sample emits yellow light,Er³⁺,Yb³⁺ co-doped sample emits green light, and the luminous intensity of Tm³⁺, Er³⁺, Yb³⁺ co-doped sample is weaken and the color is tunable.