The sub-micron sized YAG ： Ce phosphors were synthesized via a modified sol-gel method by peptizing nano-pesudoboehmite particulate. It is found that YAG phase from the dried gel powders appears at 1000 ℃ then the p...The sub-micron sized YAG ： Ce phosphors were synthesized via a modified sol-gel method by peptizing nano-pesudoboehmite particulate. It is found that YAG phase from the dried gel powders appears at 1000 ℃ then the pure YAG phase exists at a relatively lower sintering temperature of 1400 ℃. The smaller sizes of phosphors in the ranges of 1 - 3 μm are obtained due to the contribution of seeding effects of nano-sized alumina particles to strengthen each step of the processes. Both the excitation and emission spectra of photoluminescence of the phosphor obtained at 1400 ℃ meet well with the spectroscopic requirements of the WLED phosphors.展开更多
分别采用Li2CO3、Fe PO4和Mg C2O4作为原料,离子液体[BMIm]N(CN)2作为碳源,活性炭粉作为吸波材料,通过微波加热一步合成Li Fe PO4/C复合材料。采用X射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)和恒流充放电测试对Li Fe PO4/C复合材料...分别采用Li2CO3、Fe PO4和Mg C2O4作为原料,离子液体[BMIm]N(CN)2作为碳源,活性炭粉作为吸波材料,通过微波加热一步合成Li Fe PO4/C复合材料。采用X射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)和恒流充放电测试对Li Fe PO4/C复合材料的形貌、结构和性能做了分析。结果表明,制备的Li Fe PO4/C复合材料呈不规则球状,颗粒约为1μm。离子液体加入量为10%(质量分数)时制备的Li Fe PO4/C复合材料表面包覆碳膜厚度约为20 nm,在0.1 C倍率下放电比容量为126.8 m A·h/g,并具有良好的循环性能。展开更多
文摘The sub-micron sized YAG ： Ce phosphors were synthesized via a modified sol-gel method by peptizing nano-pesudoboehmite particulate. It is found that YAG phase from the dried gel powders appears at 1000 ℃ then the pure YAG phase exists at a relatively lower sintering temperature of 1400 ℃. The smaller sizes of phosphors in the ranges of 1 - 3 μm are obtained due to the contribution of seeding effects of nano-sized alumina particles to strengthen each step of the processes. Both the excitation and emission spectra of photoluminescence of the phosphor obtained at 1400 ℃ meet well with the spectroscopic requirements of the WLED phosphors.
文摘分别采用Li2CO3、Fe PO4和Mg C2O4作为原料,离子液体[BMIm]N(CN)2作为碳源,活性炭粉作为吸波材料,通过微波加热一步合成Li Fe PO4/C复合材料。采用X射线衍射(XRD)、透射电镜(TEM)、扫描电镜(SEM)和恒流充放电测试对Li Fe PO4/C复合材料的形貌、结构和性能做了分析。结果表明,制备的Li Fe PO4/C复合材料呈不规则球状,颗粒约为1μm。离子液体加入量为10%(质量分数)时制备的Li Fe PO4/C复合材料表面包覆碳膜厚度约为20 nm,在0.1 C倍率下放电比容量为126.8 m A·h/g,并具有良好的循环性能。
