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- W2367717060 abstract "The red-emitting phosphors NaLa(MoO 4) 2 ∶ Eu 3 + was synthesized by microwave-assisted sol-gel method using citric as complexing agent.These compounds were characterized by means of thermo gravimetric-differential thermal analysis,fourier transform infrared spectroscopy,X-ray diffraction,scanning electron microscope and fluorescence spectrophotometer.The results show that the target products NaLa(MoO 4) 2 ∶ Eu 3 + have been synthesized by calcining precursor at the temperature from 700 ℃ to 900 ℃.The obtained products are of pure scheelite type molybdate with tetragonal crystal structure.The particles of NaLa(MoO 4) 2 ∶ Eu 3 + are spherical in shape with a diameter of 1-3 μm.The excitation spectrum of NaLa(MoO 4) 2 ∶ Eu 3 + has a broad band in the range of 250-350 nm,and the main peak is at 290 nm.The broad band can be ascribed to the charge transfer band of Mo-O and Eu-O.The sharp lines in 350-500 nm range are due to 4f-4f transitions of Eu 3 +.The emission spectrum contains a series of narrow peaks,with the main peak at 616 nm originated from the electric dipole transition of 5 D 0 → 7 F 2 of Eu 3 +.Meanwhile,the influences of reaction temperature and time,molar ratio of citric and EG,and flux on the fluorescent properties of as-prepared samples were also investigated." @default.
- W2367717060 created "2016-06-24" @default.
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- W2367717060 date "2013-01-01" @default.
- W2367717060 modified "2023-09-23" @default.
- W2367717060 title "Synthesis and Luminescent Properties of Red-emitting Phosphors NaLa( MoO_4)_2:Eu~(3+) by Microwave-assisted Sol-gel Method" @default.
- W2367717060 hasPublicationYear "2013" @default.
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