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Sodium lanthanum molybdate-zinc molybdate europium-doped spherical red light emitting material and preparation method thereof

A luminescent material, sodium lanthanum molybdate technology, applied in luminescent materials, chemical instruments and methods, climate sustainability, etc., can solve the problem of reducing light scattering, conversion efficiency is not as good as micron-sized phosphors, surface morphology light In order to achieve the effect of less equipment restrictions, suitable for popularization and use, and good shape control

Pending Publication Date: 2022-08-09
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to reduce the scattering of light. Research has found that nanometer-scale phosphor particles with very high transparency can be used, but the conversion efficiency of this method is far lower than that of micron-scale phosphors. The surface morphology of phosphor powder has a great influence on the light efficiency of LED

Method used

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  • Sodium lanthanum molybdate-zinc molybdate europium-doped spherical red light emitting material and preparation method thereof
  • Sodium lanthanum molybdate-zinc molybdate europium-doped spherical red light emitting material and preparation method thereof
  • Sodium lanthanum molybdate-zinc molybdate europium-doped spherical red light emitting material and preparation method thereof

Examples

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Embodiment 1

[0035] A kind of sodium lanthanum molybdate-zinc molybdate doped europium spherical red light emitting material, its chemical formula is NaLa 0.95 (MoO 4 ) 2 -ZnMoO 4 :0.05Eu 3+ .

[0036] The above-mentioned preparation method of sodium lanthanum molybdate-zinc molybdate doped europium spherical red light emitting material specifically comprises the following steps:

[0037] Add lanthanum oxide and europium oxide into a nitric acid solution with a concentration of 65%, and control the temperature to stir and dissolve in the range of 40 to 60 °C, respectively, to prepare a lanthanum nitrate solution with a concentration of 0.20±0.001mol / L and 0.02±0.001 mol / L. mol / L europium nitrate solution; dissolve sodium molybdate in deionized water to prepare a sodium molybdate solution with a concentration of 0.40±0.001mol / L.

[0038] Measure an appropriate amount of lanthanum nitrate solution and europium nitrate solution in a beaker, weigh an appropriate amount of zinc nitrate and...

Embodiment 2

[0044] A kind of sodium lanthanum molybdate-zinc molybdate doped europium spherical red light emitting material, its chemical formula is NaLa 0.95 (MoO 4 ) 2 -ZnMoO 4 :0.05Eu 3+ .

[0045] The above-mentioned preparation method of sodium lanthanum molybdate-zinc molybdate doped europium spherical red light emitting material specifically comprises the following steps:

[0046] Add lanthanum oxide and europium oxide into a nitric acid solution with a concentration of 65%, and control the temperature to stir and dissolve in the range of 40 to 60 °C, respectively, to prepare a lanthanum nitrate solution with a concentration of 0.20±0.001mol / L and 0.02±0.001 mol / L. mol / L europium nitrate solution; dissolve sodium molybdate in deionized water to prepare a sodium molybdate solution with a concentration of 0.40±0.001mol / L.

[0047] Measure an appropriate amount of lanthanum nitrate solution and europium nitrate solution in a beaker, weigh an appropriate amount of zinc nitrate and...

Embodiment 3

[0053] A kind of sodium lanthanum molybdate-zinc molybdate doped europium spherical red light emitting material, its chemical formula is NaLa 0.95 (MoO 4 ) 2 -ZnMoO 4 :0.05Eu 3+ .

[0054] The above-mentioned preparation method of sodium lanthanum molybdate-zinc molybdate doped europium spherical red light emitting material specifically comprises the following steps:

[0055] Add lanthanum oxide and europium oxide into a nitric acid solution with a concentration of 65%, and control the temperature to stir and dissolve in the range of 40 to 60 °C, respectively, to prepare a lanthanum nitrate solution with a concentration of 0.20±0.001mol / L and 0.02±0.001 mol / L. mol / L europium nitrate solution; dissolve sodium molybdate in deionized water to prepare a sodium molybdate solution with a concentration of 0.40±0.001mol / L.

[0056] Measure an appropriate amount of lanthanum nitrate solution and europium nitrate solution in a beaker, weigh an appropriate amount of zinc nitrate and...

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Abstract

The invention relates to a red light emitting material, in particular to a sodium lanthanum molybdate-zinc molybdate europium-doped spherical red light emitting material and a preparation method thereof, and the chemical formula of the material is NaLa0. 95 (MoO4) 2-ZnMoO4: 0.05 Eu < 3 + >, comprising the following steps: S1, preparing a lanthanum nitrate solution, a europium nitrate solution and a sodium molybdate solution; s2, mixing the lanthanum nitrate solution and the europium nitrate solution, and dissolving zinc nitrate in the mixed solution to obtain a first mixed solution; s3, adding a complexing agent into the first mixed solution to obtain a second mixed solution; s4, adding a sodium molybdate solution into the second mixed solution, and stirring and mixing to obtain a third mixed solution; s5, transferring the third mixed solution into a hydrothermal reaction kettle for hydrothermal reaction, and cooling, washing and drying to obtain the sodium lanthanum molybdate-zinc molybdate europium-doped spherical red light emitting material. Compared with the prior art, the method has the advantages of low requirements on reaction conditions and equipment, simplicity in operation, regular sample morphology and the like.

Description

technical field [0001] The invention relates to a red light emitting material, in particular to a lanthanum sodium molybdate-zinc molybdate doped europium spherical red light emitting material and a preparation method. Background technique [0002] White LEDs have the advantages of small size, high luminous efficiency, long life, fast response, safe use, environmental protection and no pollution, so they are widely used in indoor lighting, LCD backlights, information displays, traffic signs and many other fields. Replacing incandescent lamps, trichromatic fluorescent lamps and high-pressure gas discharge lamps has become an eye-catching fourth-generation lighting source. However, due to the lack of red light components in white light, the white LED lighting source has many problems such as low luminous efficiency, poor color rendering and poor color reproduction of the light source. Therefore, the synthesis of high-efficiency red phosphors is of great significance to improv...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/7794H01L33/502Y02B20/00
Inventor 杨金炎肖秀珍郭晓明沈绍典俞俊毛东森
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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