A malsio for led 4 :pr 3+ Preparation method of red phosphor

A red light phosphor powder and the obtained technology are applied in chemical instruments and methods, luminescent materials, sustainable buildings, etc., and can solve the problems of uneven particle size of phosphor particles, uneven mixing of activators, affecting mixing uniformity, etc. , to achieve the effect of uniform particle size distribution, uniform dispersion and low calcination temperature

Active Publication Date: 2017-12-12
WUHU JUFEI PHOTOELECTRIC TECH CO LTD
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Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to overcome the Pr obtained by the traditional solid phase method 3+ Activate the silicate red light phosphor material and directly perform high-temperature calcination. The activator in the obtained phosphor is unevenly mixed, resulting in a broadband emission peak of the red light phosphor, and the red light color purity is low; at the same time, the particle size of the phosphor particles is uneven. , which affects the technical bottleneck of mixing uniformity with packaging glue in the later use process, thus a phosphor particle size distribution is uniform, the half-wave width of the emission peak is narrow, and the red light color purity is high, which is suitable for white LEDs with high color gamut. MAlSiO used 4 : Pr 3+ Preparation method of red light phosphor

Method used

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  • A malsio for led <sub>4</sub> :pr <sup>3+</sup> Preparation method of red phosphor
  • A malsio for led <sub>4</sub> :pr <sup>3+</sup> Preparation method of red phosphor

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Embodiment 1

[0028] Embodiment 1 This embodiment discloses a kind of MASiO for LED 4 : Pr 3+ The preparation method of red light phosphor, concrete steps are as follows:

[0029] (1) Weigh 4.502g of Al(NO 3 ) 3 9H 2 O particles are placed in a high-pressure container (the volume of the high-pressure container is 80mL, the material is a polytetrafluoroethylene liner, a stainless steel shell, and the pressure range is 0-10Mpa), and the filling ratio is 30% (referring to the ratio of the volume of the solvent to the volume of the high-pressure container) ), C 2 h 5 O (absolute ethanol): H 2 O (distilled water) = 0.25:1 volume ratio, add 4.8mL of C into the pressure vessel 2 h 5 O and 19.2 mL of H 2 O, to be Al(NO 3 ) 3 9H 2 After the O particles are fully dissolved, Al(NO 3 ) 3 solution (referring to Al 3+ accounted for C 2 h 5 O and H 2 O the concentration of the total volume of the mixed solution);

[0030] (2) According to the molar ratio of K:Al:Si=1:1:1, weigh 1.201g o...

Embodiment 2

[0035] Embodiment 2 This embodiment discloses a kind of MASiO2 for LED 4 : Pr 3+ The preparation method of red light phosphor, concrete steps are as follows:

[0036] (1) Weigh 6.302g of Al(NO 3 ) 3 9H 2 O particles are placed in a high-pressure container (the volume of the high-pressure container is 80mL, the material is a polytetrafluoroethylene lining, a stainless steel shell, and the pressure range is 0-10Mpa), and the filling ratio is 60% (referring to the ratio of the volume of the solvent to the volume of the high-pressure container) ), C 2 h 5 O (absolute ethanol): H 2 O (distilled water) = 0.2:1 volume ratio, add 8mL of C into the pressure vessel 2 h 5 O and 40 mL of H 2 O, to be Al(NO 3 ) 3 9H 2 After the O particles are fully dissolved, Al(NO 3 ) 3 solution (referring to Al 3+ accounted for C 2 h 5 O and H 2 O the concentration of the total volume of the mixed solution);

[0037] (2) According to the molar ratio of Li:Na:Al:Si=0.5:0.5:1:1, weigh ...

Embodiment 3

[0042] Embodiment 3 This embodiment discloses a kind of MASiO for LED 4 : Pr 3+ The preparation method of red light phosphor, concrete steps are as follows:

[0043] (1) Weigh 3.001g of Al(NO 3 ) 3 9H 2 O particles are placed in a high-pressure container (the volume of the high-pressure container is 80mL, the material is polytetrafluoroethylene lining, stainless steel shell, and the pressure range is 0-10Mpa), and the filling ratio is 50% (referring to the ratio of the volume of the solvent to the volume of the high-pressure container) ), C 2 h 5 O (absolute ethanol): H 2 O (distilled water) = 0.29:1 volume ratio, add 9mL of C into the pressure vessel 2 h 5 O and 31 mL of H 2 O, to be Al(NO 3 ) 3 9H 2 After the O particles are fully dissolved, Al(NO 3 ) 3 solution (referring to Al 3+ accounted for C 2 h 5 O and H 2 O the concentration of the total volume of the mixed solution);

[0044] (2) According to the molar ratio of K:Al:Si=1:1:1, weigh 0.801g of KHCO ...

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Abstract

The invention belongs to the technical field of preparing fluorescent powder through wet chemical methods, and particularly relates to a preparation method of MAlSiO4: Pr3+red-light fluorescent powder for LEDs. The preparation method includes: adopting a solvothermal method to prepared MxSr1-xTiO3: Pr3+(0<x< / =0.5) high-purity red-light fluorescent powder; calcining at low temperature in a later period to obtain MAlSiO4: Pr3+red-light fluorescent powder. Compared with conventional high-temperature solid-phase methods, later-period calcining temperature needed in the solvothermal method is low, requirements on equipment are low, energy consumption is low, and the preparation method is suitable for industrial production; Pr3+ is dispersed uniformly in the obtained fluorescent powder and is prone to entering MxSr1-xTiO3 to realize energy transfer; emission peak half-wave width of the obtained fluorescent powder is small, and red light is high in color purity; grain size is distributed uniformly, uniform mixing of the fluorescent powder with glue in subsequent application is facilitated, and the fluorescent powder is suitable for being used in high-color-gamut white-light LEDs.

Description

technical field [0001] The invention belongs to the technical field of preparing fluorescent powder by wet chemical method, in particular to a kind of MAlS iO for LED 4 : Pr 3+ The preparation method of red light phosphor. Background technique [0002] At present, rare earth luminescent materials have become the core materials in the fields of information display, lighting source, and optoelectronic devices. Among them, the most widely used is the phosphor material that can be excited by ultraviolet light-blue light (200-500nm) to produce different luminescent colors. The high luminous intensity, high color purity and uniform particle size of phosphor can significantly improve the performance of optoelectronic devices. Red phosphor is one of the important components of three primary color phosphors. At present, the matrix materials of red phosphor mainly include aluminate, silicate, tungstate and titanate, etc., but red phosphors of different systems are in There are dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64
CPCC09K11/7706Y02B20/00
Inventor 高丹鹏邢其彬童文鹏
Owner WUHU JUFEI PHOTOELECTRIC TECH CO LTD
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