以NH4OH+NH4HCO3混合溶液作为复合沉淀剂,利用反向滴定共沉淀法制备了不同浓度Ce,Pr共掺杂LuAG沉淀前驱体,并研究了Pr掺杂浓度为0.25at％,Ce掺杂浓度分别为0、0.1at％、0.2at％和0.3at％的LuAG透明陶瓷的光学性能.沉淀前驱体经马弗炉1200℃煅烧2h后所得粉体的分散性较好,一次颗粒尺寸约为60 nm.该粉体经干压和冷等静压成型后,在H2气氛1800℃下烧结6h制备出透明陶瓷,经双面抛光后透明陶瓷在800 nm波长处直线透过率达到82％.X射线激发的发射光谱表明,共掺使Pr离子5d-4f的发射能量传递给Ce离子,有助于提高LuAG透明陶瓷在550砌发光中心的发光强度.0.2at％Ce和0.25at％Pr共掺杂时,透明陶瓷的发光强度达到最大.
参考文献
| [1] | Carel W E van Eijk.Inorganic scintillators in medical imaging[J].Physics in medicine and biology,20028(8):R85-R106. |
| [2] | Moses WW.Recent advances and future advances in time-of-flight PET[J].Nuclear Instruments and Methods in Physics Research, Section A. Accelerators, Spectrometers, Detectors and Associated Equipment,20072(2):919-924. |
| [3] | Nikl M.;Mihokova E.;Pejchal J.;Vedda A.;Fasoli M.;Fontana I.;Laguta V. V.;Babin V.;Nejezchleb K.;Yoshikawa A.;Ogino H.;Ren G..Scintillator Materials—Achievements, Opportunities, and Puzzles[J].IEEE Transactions on Nuclear Science,20083(3):1035-1041. |
| [4] | Ogino H;Yoshikawa A;Nikl M;Kamada K;Fukuda T.Scintillation characteristics of pr-doped Lu3Al5O12 single crystals[J].Journal of Crystal Growth,20062(2):239-242. |
| [5] | 沈毅强;石云;潘裕柏;冯锡淇;吴乐翔;寇华敏;章志明;魏龙.高光输出快衰减Pr∶Lu3Al5O12闪烁陶瓷的制备和成像[J].无机材料学报,2014(5):534-538. |
| [6] | Kamada K.;Tsutsumi K.;Usuki Y.;Ogino H.;Yanagida T.;Yoshikawa A..Crystal Growth and Scintillation Properties of 2-Inch-Diameter <formula formulatype="inline"><tex>${rm Pr}:{rm Lu}_{3}{rm Al}_{5} {rm O} _{12}$</tex> </formula> (Pr:LuAG) Single Crystal[J].IEEE Transactions on Nuclear Science,20083(3):1488-1491. |
| [7] | J.M. Ogieglo;A. Zych;T. Juestel;A. Meijerink;C.R. Ronda.Luminescence and energy transfer in Lu_3Al_5O_(12) scintillators co-doped with Ce~(3+) and Pr~(3+)[J].Optical materials,20133(3):322-331. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%