| 用于白光LED的硼铝硅酸盐YAG玻璃陶瓷制备 |
| Fabrication of the Aluminoborosilicate YAG Glass-Ceramic Phosphor for White LED |
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| 摘要: 用共沉淀法制得的Y3Al5O12(YAG)∶Ce3+前驱体，混和H3BO3-SiO2-Al2O3-Na2CO3玻璃初始材料，经过1 300 ℃ 3 h煅烧，得到用于白光LED封装的硼铝硅酸盐YAG玻璃陶瓷。用差热分析(DTA)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)和光致发光(PL)等分析方法对产物进行表征。研究发现Al2O3和YAG∶Ce3+前驱体含量对YAG玻璃陶瓷激发和发射光谱强度有重要影响。结果表明，玻璃陶瓷中晶体为10 μm左右的YAG，其激发和发射光谱与标准YAG荧光粉光谱一致。当Al2O3和YAG∶Ce3+前驱体含量分别为初始混合材料质量的11.5%和34.6%时，玻璃陶瓷荧光强度达到最大值。用本文制备的硼铝硅酸盐YAG玻璃陶瓷封装成白光LED，在350 mA驱动电流下，色坐标为(0.293 4，0.309 4)，相关色温为8 020 K，显色指数为75.2。 |
| 关键词: 白光LED 硼铝硅酸盐 YAG∶Ce3+ 玻璃陶瓷 |
| 基金项目: |
| Abstract: Employing a simple co-precipitation method, Y3Al5O12(YAG)∶Ce3+ aluminoborosilicate glass-ceramic phosphors for white LED have been successfully synthesized by mixing phosphor precursor with H3BO3-SiO2-Al2O3-Na2CO3 glass powder through calcining at 1 300 ℃ for 3 hours. The as-prepared YAG glass-ceramic phosphor were investigated by DTA, XRD, SEM, and PL. It was found the contents of Al2O3 and YAG∶Ce3+ raw material have great effect on the excitation and emission spectra intensity of glass-ceramic phosphors. The results showed that the grains in glass-ceramic phosphor are YAG crystals with the size of 10 μm and the excitation and emission spectra of YAG glass-ceramic are consistent with the known YAG phosphor. The fluorescent intensity reaches the maximum, when the Al2O3 and YAG∶Ce3+ precursor contents were 11.5% and 34.6%, respectively. Under 350 mA forward-bias current, the chromaticity coordinates (CIE), correlated color temperature, and the CRI were x=0.293 4, y=0.309 4, 8 020 K, and 75.2, respectively, the white LEDs were made by packaging YAG aluminoborosilicate glass-ceramic. |
| Keywords: white LED aluminoborosilicate YAG∶Ce3+ glass-ceramic |
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| 宋国华,缪建文,王 淼,纪宪明.用于白光LED的硼铝硅酸盐YAG玻璃陶瓷制备[J].无机化学学报,2010,26(11):1975-1980. |
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