选择制备了Tb3+掺杂的不同ZnO含量、组成为xZnO- [(100-x)/2]B2O3-[(100-x)/2]SiO2(x=55,60, 65,70)的ZBS玻璃.并通过光致发光光谱、余辉衰减曲线、热释光谱以及紫外-可见吸收光谱系统地研究了该玻璃系统的余辉发光特性和光致变色现象.随着ZnO含量的增加,基质玻璃中Tb3+的5D4→7F5跃迁对应的余辉发光强度增大、其寿命变长.热释光谱表明ZnO含量的提高没有形成新的陷阱,而是增加了陷阱的浓度导致余辉寿命增长.光致变色实验发现:不同样品在紫外照射后其变色程度随ZnO含量增加而增加.玻璃的变色主要由色心引起,本研究中ZnO含量的增加使玻璃基质中Zn离子相关的氧空位浓度增大,从而在紫外光照射后,具有不同陷阱能级深度的色心浓度也相应增加,最终导致了所观察到的余辉特性和光致变色特性的变化结果.另外,通过对不同温度热处理后样品的透过率变化实验分析认为,陷阱能级浅的色心对长余辉有贡献,能级深的将稳定存在于基质中,并对光致变色有较大贡献.
参考文献
| [1] | QIU Jiangrong;Alexander L.Gaeta;Kazuyuki Hirao .Long-lasting phosphorescence in oxygen-dificit Ge-doped silica glasses at room temperature[J].CHEMICAL PHYSICS LETTERS,2001,333:236-241. |
| [2] | 陈清明,林元华,张中太,唐子龙.长余辉蓄光玻璃的制备及其性能研究[J].功能材料,2001(02):208-209. |
| [3] | Hussain N S;Reddy Y P;Buddhudu S .Luminescence properties of Tb3+-doped PbO-Bi2O3-GeO2 glasses[J].Materials Letters,2002,53(1-2):25-29. |
| [4] | Kinoshita T.;Hosono H. .Materials design and example of long lasting phosphorescent glasses utilizing electron trapped centers[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2000(1/3):257-263. |
| [5] | N.Sooraj Hussain;Y.Prabhakara Reddy;S.Buddhudu .Emission properties of Tb~3+-doped zinc boro-silicate glasses[J].Materials Letters,2001(5):303-308. |
| [6] | Yamazaki M.;Nagahama S.;Sawanobori N.;Mizuguchi M.;Hosono H.;Yamamoto Y. .Long luminescent glass: Tb3+-activated ZnO-B2O-SiO2 glass[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,1998(1):71-73. |
| [7] | Annapurna K.;Kumar A. .Fluorescence spectra of Cu~+:ZnO-B_2O_3-SiO_2 glass[J].Materials Letters,2000(1):23-26. |
| [8] | Chengyu Li;Qiang Su;Shubin Wang .Multi-color long-lasting phosphorescence in Mn~(2+) -doped ZnO-B_2O_3-SiO_2 glass-ceramics[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2002(8):1443-1449. |
| [9] | Shalgaonkar C S;Narlikar A V.Review:a review of recent methods for determining trap depth from glow curves[J].Journal of Materials Science,1972(07):1465-1471. |
| [10] | 张天之,苏锵,王淑彬.MAl2O4：Eu2+、RE3+长余辉发光性质的研究[J].发光学报,1999(02):170-175. |
| [11] | 王静,李成宇,苏锵,王淑彬.蓝紫色ZnO-Al2O3-SiO2长余辉陶瓷[J].中国稀土学报,2002(06):616-619. |
| [12] | Katsumata T.;Toyomane S.;Tonegawa A.;Kanai Y.;Kaneyama U.;Shakuno K. Sakai R.;Komuro S.;Morikawa T. .Characterization of trap levels in long-duration phosphor crystals[J].Journal of Crystal Growth,2002(Pt.1):361-366. |
| [13] | Kawazoe H;Suzuki R;Inoue S et al.Mechanism of photochromism in oxide glasses containing a large of CdO or ZnO[J].Journal of Non-Crystalline Solids,1989,111:16-18. |
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%