Eu3+ activated rear earth silicon phosphate fluorescent powder and preparing method and application thereof

A technology of silicon phosphate and fluorescent powder, which is applied in the field of rare earth luminescent materials, can solve the problems of low excitation efficiency and poor stability, and achieve the effects of easy product, simple preparation process, and no waste water and waste gas discharge

Inactive Publication Date: 2014-07-16
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of low excitation efficiency and poor stability in the near-ultraviolet and blue light regions of the current red phosphor powder used in white light LEDs, and to provide a small particle Eu 3+ Luminescence, preparation method and application of activated rare earth silicon phosphate

Method used

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  • Eu3+ activated rear earth silicon phosphate fluorescent powder and preparing method and application thereof
  • Eu3+ activated rear earth silicon phosphate fluorescent powder and preparing method and application thereof
  • Eu3+ activated rear earth silicon phosphate fluorescent powder and preparing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Press La 9.35 Eu 1.65 P 3 SiO 26 Weigh the molar ratio of each element in: europium oxide 0.726g, lanthanum oxide 3.808g, ammonium dihydrogen phosphate 0.8627g, silicon dioxide 0.153g; grind and mix all the raw materials weighed well in an agate mortar; select Air atmosphere, pre-fire the homogeneously mixed raw materials in a muffle furnace at 600°C for 7 hours, cool to room temperature; grind and mix evenly, sinter in a muffle furnace at 900°C for 5 hours, cool to room temperature and grind Mix evenly, sinter in a muffle furnace at 1350°C for 14 hours, and cool to room temperature to obtain La 9.35 Eu 1.65 P 3 SiO 26 red phosphor.

[0030] See attached figure 1 , which is a comparison between the X-ray powder diffraction pattern of the sample prepared according to the technical scheme of this embodiment and the standard card PDF#54-1216. The XRD test results show that the prepared material is a single-phase material.

[0031] See attached figure 2 , is the ...

Embodiment 2

[0034] Press La 10.2 Eu 0.8 P 3 SiO 26 Weigh the molar ratio of each element in: europium oxide 0.352g, lanthanum oxide 4.1542g, ammonium dihydrogen phosphate 0.8627g, silicon dioxide 0.153g; grind and mix all the raw materials weighed well in an agate mortar; select In an air atmosphere, pre-fire the homogeneously mixed raw materials in a muffle furnace at 650°C for 7 hours, cool to room temperature; grind and mix evenly, sinter in a muffle furnace at 950°C for 5 hours, cool to room temperature and grind Mix evenly, sinter in a muffle furnace at 1400°C for 13 hours, and cool to room temperature to obtain La 10.2 Eu 0.8 P 3 SiO 26 red phosphor.

[0035] According to the X-ray diffraction spectrum of the material sample prepared by the technical scheme of this embodiment, the excitation and emission spectra are respectively the same as figure 1 , 2 and 3 are approximate.

Embodiment 3

[0037] Press Sm 10.2 Eu 0.8 P 3 SiO 26 The molar ratio of each element in the formula is weighed: europium oxide 0.352g, samarium oxide 4.577g, ammonium dihydrogen phosphate 0.8627g, silicon dioxide 0.153g; all the raw materials weighed are ground and mixed in an agate mortar; In an air atmosphere, pre-fire the homogeneously mixed raw materials in a muffle furnace at 650°C for 8 hours, cool to room temperature; grind and mix evenly, sinter in a muffle furnace at 900°C for 6 hours, cool to room temperature and grind Mix well, sinter in a muffle furnace at 1400°C for 13 hours, cool to room temperature to obtain Sm 10.2 Eu 0.8 P 3 SiO 26 red phosphor.

[0038] According to the X-ray diffraction spectrum of the material sample prepared by the technical scheme of this embodiment, the excitation and emission spectra are respectively the same as figure 1 , 2 and 3 are approximate.

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Abstract

The invention discloses a Eu+3 activated rear earth silicon phosphate fluorescent powder and a preparing method and an application thereof, which belong to the technical field of flourescent materials. The chemical formula of the fluorescent powder is R11-xEuxP3SiO26, wherein R represents for at least one of La3+, Gd3+, Sm3+, Lu3+ and Y3+, x represents for Eu3+ doped mole percentage coefficient, and 0.001<=x<=11. Compound containing R, Eu3+, P5+ and Si4+ serves as the raw materials, the raw materials are weighted by molar ratio of chemical formula, grinded and evenly mixed, the red fluorescent powder is obtained through calcining at the air atmosphere, the red fluorescent powder has strong excitation close to 460nm, is coincided with emission wavelength of near-ultraviolet light-emitting diode (LED) chips and has high light-emitting efficiency and good thermal stability. Under near-ultraviolet excitation, the fluorescent powder can emit bright red fluorescence, and light-emitting wavelength is mainly 616nm.

Description

technical field [0001] The present invention relates to a kind of Eu 3+ The luminescence, preparation method and application of activated rare earth silicon phosphate belong to the technical field of rare earth luminescent materials. Background technique [0002] Light-emitting diode LED is an energy conversion device that can convert electrical energy into light energy. It has low operating voltage, low power consumption, stable performance, long life, strong impact resistance, vibration resistance, light weight, small size, and low cost. , fast luminous response and other advantages. Therefore, it is widely used in display devices and short-distance, low-efficiency optical fiber communication light sources, especially the rapid development of blue, purple and ultraviolet LEDs this year, making it possible for LEDs to replace incandescent and fluorescent lamps in the lighting field. [0003] The biggest advantage of silicate phosphor is broad-spectrum absorption. It ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81H01L33/50
CPCY02B20/181Y02B20/00
Inventor 黄彦林杜福平王佳宇
Owner SUZHOU UNIV
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