摘要
采用半熔化-淬冷的一步法制备了一种新型的硅酸钙绿光玻璃陶瓷,通过变化在1 550℃的保温时间,研究了玻璃陶瓷中沉积的微观结构对发光性质的影响。延长保温时间,玻璃陶瓷中沉积的发光晶体β-Ca2 SiO4∶Eu2+和发光玻璃相的比例趋于减少,导致样品发射光谱红移,透明度增加。本论文同时分析了SiO2晶粒在玻璃基体中的沉积现象。绿光玻璃陶瓷可以被近紫外到蓝紫光有效激发,在转光型高功率LED中具有潜在的应用前景。
Calcium silicate glass-ceramic phosphor with green emission was evaluated.The effect of crystals precipitation microstructure on spectral properties was investigated by changing the holding time at melting temperature.With the in crease of holding duration,the amount ratio of luminous β-Ca2SiO4∶ Eu2＋ crystalline phase to glassy phase tended to be decreased,leading to a red-shift of the emission band and exhibiting more transparent of the glass-ceramic phosphor.The precipitation of SiO2 crystals in priority was proposed.The broad excitation band of the green-emitting glass-ceramic phosphors covers the wavelength from 270 to 440 nm,showing the potential for the high-power phosphor-converted LED.
出处
《发光学报》
EI
CAS
CSCD
北大核心
2011年第12期1251-1256,共6页
Chinese Journal of Luminescence
基金
supported by the National Natural Science Foundation of China(50872091)
Key Discipline of Materials Physics and Chemistry(Tianjin,China)(10SYSYJC28100)~~
