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Chinese Journal of Materials Research  2012, Vol. 26 Issue (6): 615-620    DOI:
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Synthesis and Luminescence Properties of Hollow Spherical CaMoO4:Eu3+,  Li+ Red Phosphors
WANG Xia, HE Yan, PENG Guihua, LIANG Zhenhua, WU Jinglong
Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), College of Chemistry and Chemical Engineering & Guangxi Normal University, Guilin 541004
Cite this article: 

WANG Xia HE Yan PENG Guihua LIANG Zhenhua WU Jinglong. Synthesis and Luminescence Properties of Hollow Spherical CaMoO4:Eu3+,  Li+ Red Phosphors. Chinese Journal of Materials Research, 2012, 26(6): 615-620.

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Abstract  

Hollow spherical CaMoO4:Eu3+, Li+ red phosphors were synthesized by spray pyrolysis method, using calcium nitrate, europium oxide, lithium carbonate and ammonium molybdate as raw materials. The crystalline phase, morphology and luminescence properties of the obtained samples were characterized by X-ray diffraction, scanning electron microscopy and photoluminescence emission spectra, and the effects of the pyrolysis temperature were investigated. The results show that the emission intensity
of the samples first strengthens, then decreases with the increase of pyrolysis temperature. The intensity of the sample pyrolyzed at 400  reaches a maximum value. At this pyrolysis temperature, a single phase of CaMoO4 can be obtained and the sample is composed of hollow spheres with an average size of 1.4 μm. The hollow spherical CaMoO4:Eu3+, Li+powders can be excited efficiently by ultraviolet light with the wavelength of 395 nm and visible blue light with the wavelength of 465 nm, and show a strong red emission of 617 nm.

Key words:  inorganic non-metallic materials      red phosphor      spray pyrolysis      CaMoO4:Eu3+      Li+      hollow sphere     
Received:  14 September 2012     
ZTFLH:  TB34  
Fund: 

Supported by National Natural Science Foundation of China Nos.50962003 & 51102053.

URL: 

https://www.cjmr.org/EN/     OR     https://www.cjmr.org/EN/Y2012/V26/I6/615

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