Combustion Synthesis of CaMoO4:Eu3+, Li+ Red Phosphors Using Urea-Thiourea Mixture Fuels

Xia Wang; Yu Zhi Feng; Gui Hua Peng; Zhen Hua Liang; Xiao Bao Han

doi:10.4028/www.scientific.net/AMR.652-654.546

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 652-654Combustion Synthesis of CaMoO4:Eu3+, Li+ Red...

Combustion Synthesis of CaMoO₄:Eu³⁺, Li⁺ Red Phosphors Using Urea-Thiourea Mixture Fuels

Abstract:

The CaMoO₄:Eu³⁺, Li⁺ red phosphors were synthesized by combustion synthesis with urea or urea-thiourea as fuels, and their crystalline phase, morphology and luminescent properties were investigated. The XRD results demonstrated that all the diffraction peaks of the products can be well indexed to the pure tetragonal phase of CaMoO₄. The SEM photographs showed that the particles of sample using urea as fuel are agglomeration, while the particles of sample using urea-thiourea mixture fuels are non-agglomeration. The powder can be effectively excited by ultraviolet with wavelength of 395 nm, and exhibits a strong red emission with maximum wavelength at 615 nm. The luminescent intensity of the phosphor with mixture fuels had 2.2 times stronger than that of the phosphor with single fuel, and its chromaticity coordinates (0.65, 0.35) was closer to NTSC standard values (0.67, 0.33).

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Advanced Materials Research (Volumes 652-654)

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546-549

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https://doi.org/10.4028/www.scientific.net/AMR.652-654.546

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January 2013

Authors:

Xia Wang, Yu Zhi Feng, Gui Hua Peng, Zhen Hua Liang, Xiao Bao Han

Keywords:

CaMoO₄, Combustion Synthesis, Mixture Fuels, Phosphor

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