(Gd,Lu)AlO3:Dy3+ and (Gd,Lu)3Al5O12:Dy3+ as high-temperature thermographic phosphors
(Gd,Lu)AlO3:Dy3+ and (Gd,Lu)3Al5O12:Dy3+ as high-temperature thermographic phosphors
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DOI：
10.1088/1361-6501/aafcac
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发表时间：
2019-03-01
影响因子：
2.4
通讯作者：
Zigan, Lars
中科院分区：
文献类型：
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作者：
Hertle, Ellen;Chepyga, Liudmyla;Zigan, Lars
对Dy 3+掺杂的钆铝钙钛矿GdAlO 3（GAP）和钆铝石榴石Gd 3Al 5 O 12（GAG）的热成像性能进行了比较研究，特别是考虑到这些材料在恶劣测量环境中用于表面测温的适用性。采用高温固相法，以氟化锂（LiF）为助熔剂合成了荧光粉。研究了Lu 3+取代Gd 3+对石榴石结构稳定性和荧光粉发光性能的影响。从Gd 3+到Dy 3+的有效能量转移导致通过Gd 3+激发在275 nm处获得的Dy 3+发射显著强于在352 nm处直接激发Dy 3+。在室温下，具有Lu 3+取代的GAP：Dy 3+的发光强度是GAP：Dy 3+的三倍。由于这种强度增强，强度比和衰减时间方法的温度测量范围从900 K扩展到1100 K。在室温下，（Gd，Lu）AG：Dy ~（3+）的发光强度比（Gd，Lu）AP：Dy ~（3+）的发光强度提高了一倍，并且用上述方法测量温度的可靠性提高到1600 K。
A comparative investigation of the thermographic properties of Dy3+-doped gadolinium aluminum perovskite GdAlO3 (GAP) and gadolinium aluminum garnet Gd3Al5O12 (GAG) was performed with special regard to the suitability of these materials for surface thermometry in harsh measurement environments. The phosphors were synthesized by conventional high-temperature solid-state method using lithium fluoride (LiF) as a flux. The effects of substituting Gd3+ by Lu3+ ions on the stability of the garnet structure and the luminescence properties of the phosphors were investigated. An efficient energy transfer from Gd3+ to Dy3+ resulted in significantly stronger Dy3+ emission obtained through Gd3+ excitation at 275 nm compared to direct excitation of Dy3+ at 352 nm. The luminescence intensity of GAP:Dy3+ with Lu3+ substitution was three times higher at room temperature compared to GAP:Dy3+. Due to this intensity enhancement, the range of temperature measurements by the intensity ratio and decay time methods was extended from 900 K to 1100 K. The luminescence intensity of (Gd,Lu)AG:Dy3+ was doubled at room temperature compared to (Gd,Lu)AP:Dy3+ and the limit for reliable temperature measurements by the above mentioned methods was increased up to 1600 K.