期刊
JOURNAL OF RARE EARTHS
卷 27, 期 3, 页码 376-380出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S1002-0721(08)60254-9
关键词
ceramic; Lu3Al5O12; praseodymium; VUV-UV spectra; concentration quenching; rare earths
资金
- National Natural Science Foundation of China [10774140]
- National Nature Science Foundation of China [50711120504]
- Doctoral Program of Higher Education [20060358054]
- Special Foundation for Talents of Anhui Province, China [2007Z021]
Lutetium aluminum garnet (LuAG) precursors doped with different Pr3+ concentration (0.25at.%, 0.5at.%, 1.0at.%, 3.0at.%, 5.0at.%) were synthesized via a co-precipitation method using ammonium hydrogen carbonate as precipitant. The phase evolution and morphology of the precursor were characterized with X-ray diffractometer (XRD) and transmission electron microscopy (TEM). The resultant LuAG:Pr3+ powder was sintered into translucent ceramic without any additives in vacuum at 1150 degrees C and then in nitrogen atmosphere at 1700 degrees C. Photoluminescence spectra of LuAG:Pr3+ powder and ceramic were measured at room temperature in vacuum ultraviolet (VUV) and ultraviolet (VU) region. For the 5d-4f transition of Pr3+ ions, dominant emission of ceramic samples peaking round 311 nm had higher luminescence intensity. And the host absorption in ceramic samples was not as intensive as that in powder samples The luminescent intensity of LuAG:Pr-3+ varied with the Pr3+ contents and the quenching concentration was about 1.0at.% for ceramic and 3.0at.% for powder, which was much higher than 0.24at.% for LuAG:Pr3+ single crystals. This phenomenon showed that the ceramic had some superiority over single crystals.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据