【摘 要】
：
The new phosphor calcium magnesium chlorosilicate, codoped with Eu2+ and Dy3+, was synthesized with the help of the high temperature solid state reaction in red
【机 构】
：
National Engineering Research Center for Rare Earth Materials,Department of Chemistry
论文部分内容阅读
The new phosphor calcium magnesium chlorosilicate, codoped with Eu2+ and Dy3+, was synthesized with the help of the high temperature solid state reaction in reducing atmosphere. The excitation and emission spectra were very similar to that of Ca8Mg(SiO4)4Cl2:Eu2+, and the Dy3+ concentration influenced the emission intensity of this phosphor. The intensity of Eu2+ and Dy3+ codoped CMSC was stronger than that of Eu2+ singly doped CMSC. The emission spectrum of the Dy3+ ion overlapped the absorption band of the Eu2+ ion, indicating that an energy transfer from Dy3+ to Eu2+ took place in CMSC:Eu2+, Dy3+ phosphor. The mechanism of the energy transfer from Dy3+ to Eu2+, in this phosphor, might be resonant energy transfer.
其他文献
Model and simulation are good tools for design optimization of fuel cell systems. This paper proposes a new hybrid model of proton exchange membrane fuel cell (
Nd55-xAl10+xCo20Fe15 (x=0, 5, 10) bulk glass-forming alloys with distinct glass transition in differential scanning calorimetry (DSC) traces were obtained by su
介绍了B2C旅游电子商务的概念并分析了其优势，剖析了制约我国B2C旅游电子商务发展的主要因素，提出通过建立准确的定位、选择合适的经营模式、确定企业的盈利模式等促进我国B2C
The principle for the electro-generative leaching was applied to simultaneous leaching of sphalerite-MnO2. A galvanic system for the bio-electro-generative leac
A new polymer named polyferrocarbosilane(PFCS) was prepared from polydimethylsilane and ferrocene. The spinnability of this polymer can be tailored by controlli
Ti2AlC bulk material was synthesized by hot pressing of mixture powders of TiC, Ti, Al and active carbon. The phase compositions of resultant product at differe
Due to the importance of detecting the matte grade in the copper flash smelting process, the mechanism model was established according to the multi-phase and mu
Microstructure of SiC fiber manufactured by chemical vapor deposition (CVD) onto tungsten (W) wire core was investigated by analytical electron microscopy (AEM)
Densification behavior of nanocrystalline Mg2Si (n-Mg2Si) with grain size about 30-50 nm was investigated by hot-pressing at 400℃. The results indicated that t
In the present study, the indentation testing with a flat cylindrical indenter on typical multi-layer material systems was simulated successfully by finite elem