Preparation of (Y1-x-y, Lay)2O3:xEu3+ red phosphors by microwave-assisted homogeneous precipitation method

ZENG Qingyun; LI Qing; XIAO Ting; WANG Zongjun; XIAO Peinan

doi:10.13264/j.cnki.ysjskx.2017.02.018

Volume 8 Issue 2

Apr. 2017

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Nonferrous Metals Science and Engineering > 2017 > 8(2): 107-111. > DOI: 10.13264/j.cnki.ysjskx.2017.02.018

ZENG Qingyun, LI Qing, XIAO Ting, WANG Zongjun, XIAO Peinan. Preparation of (Y_1-x-y, La_y)₂O₃:xEu³⁺ red phosphors by microwave-assisted homogeneous precipitation method[J]. Nonferrous Metals Science and Engineering, 2017, 8(2): 107-111. DOI: 10.13264/j.cnki.ysjskx.2017.02.018

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Preparation of (Y_1-x-y, La_y)₂O₃:xEu³⁺ red phosphors by microwave-assisted homogeneous precipitation method

School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China

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Received Date: September 11, 2016
Published Date: April 29, 2017

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Abstract

A series of (Y_1-x-y, La_y)₂O₃:xEu³⁺(x=0.01~0.05, y=0.05~0.25) red phosphors were synthesized by microwave-assisted homogeneous precipitation method. The effects of doping density of Eu³⁺ and La³⁺, the calcining temperature on the characteristics of lumen-escence were investigated. The TG and FTIR curves of precursor, crystal structure, surfacemorphology, particle size and spectral characteristics of the samples were also investigated by differential thermal analysis, infrared spectroscopy, X-ray diffraction, SEM and fluoresc-ence spectrophotometer. The results indicate that the composition of precursor is (Y, La, Eu) OHCO₃·nH₂O and the as-prepared samples are cubic system. The SEM show that the samples are uniformly dispersed spherical phosphors particles with particle size of being about 200 nm. The optimum calcining temperature is 900 ℃. The optimum emission intensity of 614 nm is obtained when the x=0.03, y=0.1, 614 nm is corresponding to ⁵D₀→⁷F₂ transitionof Eu³⁺ ions in emission spectrum. The color coordinates of the sample is (0.654, 0.346).(Y_1-x-y, La_y)₂O₃:xEu³⁺ phosphors have good color purity and luminous intensity.
- (Y_1-x-y, La_y)₂O₃:xEu³⁺,
- microwave,
- red phosphor,
- homogeneous precipitation method

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Preparation of (Y_1-x-y, La_y)₂O₃:xEu³⁺ red phosphors by microwave-assisted homogeneous precipitation method

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Preparation of (Y_1-x-y, La_y)₂O₃:xEu³⁺ red phosphors by microwave-assisted homogeneous precipitation method