Preparation and optical properties of Co2+-doped Li2O–Ga2O3–SiO2 glass-ceramics
Preparation and optical properties of Co2+-doped Li2O–Ga2O3–SiO2 glass-ceramics
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DOI：
10.1016/j.jallcom.2006.11.095
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发表时间：
2008-04
影响因子：
6.2
通讯作者：
X. Duan;D. Yuan;Xiu-feng Cheng;Zhiqiang Liu;Xiqing Zhang
中科院分区：
文献类型：
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作者：
X. Duan;D. Yuan;Xiu-feng Cheng;Zhiqiang Liu;Xiqing Zhang
采用4li20 - 8ga2o3 - 88sio2 - 0.2 coo (LGS) （mol%）的凝胶加热法制备了含Co2+: liga5o8纳米晶的透明微晶玻璃。当热处理温度为800℃时，样品结晶成尺寸为6nm的liga5o8纳米晶体，在1500nm附近表现出较宽的吸收带，具有四面体Co2+离子在晶体中的特征。玻璃陶瓷在可见光和近红外（NIR）区域的发射分别归因于四面体Co2+的4t1 （4P）→4A2（4F）和4t1 （4P）→4T2（4F）跃迁。
Transparent glass-ceramics containing Co2+:LiGa5O8nanocrystals were prepared by heating the gel with composition of 4Li2O–8Ga2O3–88SiO2–0.2CoO (LGS) (mol%). When the heat-treatment temperature was 800°C, the samples crystallized to LiGa5O8nanocrystals with the size of 6nm and exhibited a broad absorption band near 1500nm, which is characteristic of tetrahedral Co2+ions in crystals. The emission in the visible and near infrared (NIR) region was observed from the glass-ceramics and attributed to the4T1(4P)→4A2(4F) and4T1(4P)→4T2(4F) transitions of tetrahedral Co2+, respectively.