摘要
采用传统熔融及退火技术，引入合适的添加剂于相对低温下成功制备出掺钕锂铝硅玻璃，通过控制成核和析晶工艺制备出锂铝硅玻璃陶瓷。采用差热分析、X射线衍射、扫描电镜、紫外-可见-近红外分光光度计和荧光光谱仪对材料进行表征。三个发光谱带中心波长位于890nm，1065nm和1330nm处，分别对应于^4F3／2→^4I9/2,^4F3/2→^4I11/2和^4I13/2跃迁。玻璃陶瓷晶相及晶粒大小对Nd^3＋离子发光性能影响很大。当Nd^3＋离子进入晶粒尺寸为10～20nm的β-锂霞石固溶体时，发光强度与基质玻璃相比明显增强，在1065nm处的受激发射截面σin达1．931×10^-21cm^2，比基质玻璃受激发射截面提高了约8％。当β-锂霞石固溶体晶粒尺寸接近可见光波长时钕离子发生荧光猝灭。而当β-锂霞石固溶体晶型转变为β-黝辉石固溶体时，荧光猝灭消失。
The lithium aluminosilicate glasses doped with Nd^3＋ ions are synthesized using the conventional melting and quenching technique at a relatively low melting temperature by introducing approprate additives. Lithium aluminosilicate glasses are converted to glass-ceramics by controlling the nucleation and crystallization process. The samples are characterized by differential thermal analysis （DTA）, X-ray diffraction （XRD）, scanning electronic microsope （SEM）, UV-vis-NIR scanning spectrophotometer and fluorescence spectrometer. Three main fluorescence bands centering at about 890 nm, 1065 nm and 1330 nm are observed, which are correspondent to transitions of ^4F3/2→^4I9/2,^4F3/2→^4I11/2 and^4I13/2, respectively. Crystal phases and the grain size of glass-ceramics are found to affect their luminescent characteristics considerably. The fluorescence intensity increases markedly when Nd^3＋ ions enter the β-eucryptite solid solutions with the grain size in the range of 10-20 nm, and the effective stimulated cross section σin is 1. 931×10^-21 cm^2 at 1065 nm,which increases by 8% in contrast to the host glass. Quenching occurs when Nd^3＋ ions locate at β-eucryptite solid solution with the grain size close to the visible light wavelength. Quenching disappears after β-eucryptite solid solution are re-crystallized into β-spodumene solid solutions.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2006年第6期869-873,共5页
Acta Optica Sinica
基金
教育部优秀青年教师(KB20026)资助课题
关键词
光学材料
Nd^3+掺杂锂铝硅玻璃陶瓷
荧光光谱
表征
optical materials
Nd^3＋-doped lithium aluminosilicate glass-ceramics
fluorescence spectra
characterization
