Ultra-wide white fluorescent material, preparation method and application of ultra-wide white fluorescent material and lighting appliance

A technology for fluorescent materials and lighting appliances, applied in the field of fluorescent materials, can solve the problems of excitation and emission spectra, inconsistent light decay and efficiency, reabsorption of three-color fluorescent materials, affecting luminous efficiency, etc., and achieves good spectral controllability and synthesis. The effect of high temperature and simple operation

Active Publication Date: 2019-06-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorption, excitation and emission spectra, light attenuation and efficiency of the blue, green and red three-color fluorescent materials are inconsistent, resulting in serious color drift of the device; there is a reabsorption problem among the three-color fluorescent materials, which affects the luminous efficiency; and complex Powder mixing process

Method used

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  • Ultra-wide white fluorescent material, preparation method and application of ultra-wide white fluorescent material and lighting appliance
  • Ultra-wide white fluorescent material, preparation method and application of ultra-wide white fluorescent material and lighting appliance
  • Ultra-wide white fluorescent material, preparation method and application of ultra-wide white fluorescent material and lighting appliance

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Experimental program
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Effect test

Embodiment 1～3

[0034] Embodiment 1~3 provides a kind of Eu 2+ The preparation method of the activated single matrix white light fluorescent material, its chemical formula is Sr 2-x-y-a Ca x Ba y Al 1+z Si 2-z N 1-z o 6+z :Eu a , where, x=y=0, z=0~1, a=0.01, namely Sr 1.99 AlSi 2 NO 6 :Eu 0.01 (denoted as T1), Sr 1.99 Al 1.5 Si 1.5 N 0.5 o 6.5 :Eu 0.01 (denoted as T2), Sr 1.99 Al 2 SiO 7 :Eu 0.01 (marked as T3), the specific preparation process is as follows:

[0035] Weigh SrCO according to stoichiometric ratio 3 Powder, Si 3 N 4 Powder, SiO 2 Powder, Al 2 o 3 Powder and Eu 2 o 3 The powder is used as the starting material, and is sintered at 1380°C for 4 hours in a nitrogen-hydrogen mixed atmosphere; the sintered fluorescent material is kept at 1300°C and 0.9MPa nitrogen atmosphere for 4 hours, cooled, and the sample is taken out of the furnace , ground and crushed to obtain the Eu 2+ The activated single-matrix white light fluorescent materials T1-T3 are subje...

Embodiment 4～9

[0043] Embodiment 4~9 provides a kind of Eu 2+ The preparation method of the activated single matrix white light fluorescent material, its chemical formula is Sr 2-x-y-a Ca x Ba y Al 1+z Si 2-z N 1-z o 6+z :Eu a , where, y=z=0, x=0~2, a=0.01, namely Sr 1.74 Ca 0.25 AlSi 2 NO 6 :Eu 0.01 (denoted as T4), Sr 1.49 Ca 0.5 AlSi 2 NO 6 :Eu 0.01 (denoted as T5), Sr 1.24 Ca 0.75 AlSi 2 NO 6 :Eu 0.01 (marked as T6), Sr 0.99 CaAlSi 2 NO 6 :Eu 0.01 (denoted as T7), Sr 0.49 Ca 1.5 AlSi 2 NO 6 :Eu 0.01 (marked as T8), Ca 1.99 AlSi 2 NO 6 :Eu 0.01 (recorded as T9), the specific preparation process is as follows:

[0044] Weigh CaCO according to stoichiometric ratio 3 Powder, SrCO 3 Powder, Si 3 N 4 Powder, SiO 2 Powder, Al 2 o 3 Powder and Eu 2 o 3 The powder is used as the starting material, and is sintered at 1380°C for 4 hours in a nitrogen-hydrogen mixed atmosphere; the sintered fluorescent material is kept at 1300°C and 0.9MPa nitrogen atmosphe...

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Abstract

The invention belongs to the field of fluorescent materials, and particularly relates to an ultra-wide white fluorescent material, a preparation method and application of the ultra-wide white fluorescent material and a lighting appliance. The ultraviolet excited ultra-wide white light luminescent material is formed by solid solution of activator Eu in Sr2-x-yCaxBayAl1+zSi2-zN1-zO6+z, and the chemical formula of the ultra-wide white light luminescent material is Sr2-x-y-aCaxBayAl1+zSi2-zN1-zO6+z: Eua, specifically, x is greater than or equal to zero but less than two, y is greater than or equalto zero but less than two, x+y is greater than or equal to zero but less than two, z is greater than or equal to negative one but less than or equal to one, and a is greater than or equal to zero butless than or equal to 0.2. The ultraviolet excited ultra-wide white light luminescent material prepared by the preparation method has a wider emission spectrum with good spectral controllability andwithout generating obvious color drift along with temperature change, both due to the fact that the luminescence is from single Eu2+; and the color characteristic can be obviously improved when the ultra-wide white light luminescent material is applied to the fields of white light LED illuminators and the like to achieve a high-quality healthy white light source. In addition, the solid-phase sintering preparation method of the ultraviolet excited ultra-wide white light luminescent material has the advantages of lower synthesis temperature, simple operation and easy batch production.

Description

technical field [0001] The invention belongs to the field of fluorescent materials, and in particular relates to an ultra-wide white fluorescent material, a preparation method and application thereof, and a lighting appliance. Background technique [0002] White LEDs (Light-emitting diodes) have a market share of more than 70% in the global lighting market due to their advantages of high efficiency, energy saving, environmental protection, long life, small size, fast response, high reliability and no radiation. At present, blue LED chips combined with yellow phosphors, or a mixture of green and red phosphors are often used in the market to package white LEDs. However, due to the shortcomings of "blue light peak" (narrow-band emission of blue LED) and "cyan gap" (gap between blue LED and phosphor emission spectrum) in the white light spectrum produced by this scheme, the light source has blue light hazards, uncomfortable Glare and lower color rendering index. [0003] In or...

Claims

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Application Information

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IPC IPC(8): C09K11/64F21V9/30F21Y115/10
CPCY02B20/00
Inventor 解荣军李淑星王振斌王学彬
Owner XIAMEN UNIV
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