稀土Sm掺杂钙硼硅发光玻璃的微晶化及其荧光增强效应

用高温熔融法制备了掺杂Sm2O3的CaO-B2O3-SiO2(CBS)发光玻璃材料,采用示差扫描量热法(DSC)确定了合适的核化/晶化温度制度.在不同核化/晶化温度制度下制备得到了微晶发光玻璃,并对其结构及光谱学特性进行了研究.X射线衍射(XRD)分析表明:经微晶化的发光玻璃出现了晶体的尖锐衍射峰,随着温度的升高,晶体类型和晶粒尺寸均发生变化.光谱学测试表明:Sm掺杂微晶发光玻璃在404nm激发下出现Sm3+的特征发射峰,峰值波长分别位于566nm、603nm和650nm;发光玻璃的荧光发射峰强度和荧光寿命均表现出随热处理温度的升高先增大后减小的变化,在核化/晶化温度为750℃/800℃条件下制备的微晶玻璃的荧光发射强度和荧光寿命均达到最大值,随着核化/晶化温度的进一步升高,样品的荧光强度和荧光寿命均有所下降.

The enhanced fluorescence in Sm doped glass-ceramics based CaO-B203-SiO2 system

A series of luminescent glass and glass-ceramics （GC） based on CaO-B2Oa-SiO2 system doped with samarium oxide （Smz03） were prepared by high temperature melting method and further crystallization. The differential scanning calorimeter （DSC） was taken in order to confirm the proper nucleation/crystallization temperature for GC. The crystal struc- ture and spectroscopic properties of the glass and GC samples were investigated by X-ray dif- fraction （XRD） analysis and photoluminescence （PL） measurement. It is indicated that some crystal structures created along with the heat treatment. Increasing the nucleation/crystalli- zation temperature will lead to the creation of crystal from TiO2 and SiO2 to Ca2B2Os and Ca2 SiO4, respectively. The PL spectrum of as-made GC samples present the characteristic e- mission peaks coming from Sma＋ , which centered at 566 nm, 603 nm and 650 nm, respec- tively. Furthermore, it is found that the fluorescent intensity and life will vary according tothe nucleation/crystallization temperature. The GC-S2 samples had the enhanced intensity and the longest life in the four samples which resulted from its crystal structures in the glass matrix. The luminescence property of this fluorescent glass can be adjusted by the controlling the nucleation/crystallization temperature and their intrisic structures and can be applied to advanced luminescent applications.