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Preparation method of silicate fluorescent powder for LEDs

A phosphor and silicate technology, applied in the field of preparation of silicate phosphors for LEDs, can solve the problems of uneven mixing of activators, low excitation efficiency of phosphors, uneven particle distribution, etc., and achieve particle size The effect of uniform distribution, low calcination temperature and simple process

Active Publication Date: 2016-06-29
SHENZHEN JUFEI OPTOELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the technical bottlenecks of uneven mixing of activators, low excitation efficiency of phosphors, poor color uniformity and uneven particle distribution in the traditional method, thereby proposing a phosphor with uniform particles, Preparation method of silicate phosphor powder for LED with high excitation efficiency and good color uniformity

Method used

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Embodiment 1

[0026] Embodiment 1 This embodiment discloses a kind of silicate fluorescent powder (namely MASiO 4 :xRE 3+ Phosphor powder) preparation method, concrete steps are as follows:

[0027] (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 liner, 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);

[0028] (2) According to the molar ratio of Na:Al:Si=1:1:1,...

Embodiment 2

[0033] Embodiment 2 This embodiment discloses a kind of silicate fluorescent powder (namely MASiO 4 :xRE 3+ Phosphor powder) preparation method, concrete steps are as follows:

[0034] (1) Weigh 2.251g 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 70% (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) = 0.45:1 volume ratio, add 17.5mL of C into the pressure vessel 2 h 5 O and 38.5 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);

[0035] (2) According to the molar ratio of Ag:Li:Al:...

Embodiment 3

[0040] Embodiment 3 This embodiment discloses a silicate phosphor (namely MAlSiO 4 :xRE 3+ Phosphor powder) preparation method, concrete steps are as follows:

[0041] (1) Weigh 2.251g 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 10% (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) = 0.45:1 volume ratio, add 2.5mL of C into the pressure vessel 2 h 5 O and 5.5 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);

[0042] (2) According to the molar ratio of K:Al:Si=1:1:1, weigh 0.601g ...

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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 silicate fluorescent powder for LEDs. Comparing silicate fluorescent powder obtained by adopting a solvothermal method with conventional high-temperature solid-phase methods, later-period calcining temperature needed in the solvothermal method is low, process is simple, energy consumption is low, and the preparation method is suitable for industrial production. Compared with the conventional solid-phase methods, RE3+ in the fluorescent powder obtained by the solvothermal method is dispersed uniformly and is prone to entering MAlSiO4 to realize energy transfer, and color developing performance of the obtained fluorescent powder is excellent; particle size of the obtained fluorescent powder is uniform in distribution, and uniform mixing of the fluorescent powder with glue in later-period application is facilitated; the fluorescent powder can be widely applied in the fields of lighting and backlight and has great market prospect and economic value.

Description

technical field [0001] The invention belongs to the technical field of preparing fluorescent powder by wet chemical method, and in particular relates to a preparation method of silicate fluorescent powder for LED. 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 color purity, high luminous intensity and evenly distributed particle size of phosphor powder can significantly improve the performance of LED devices. At present, phosphor matrix materials mainly include aluminate, phosphate, tungstate, nitride, fluoride, and silicate, etc., but the luminescent properties of phosphors in different systems are different. [0003] In 2011, Huang Yanlin and others used alkaline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
CPCC09K11/646
Inventor 高丹鹏邢其彬
Owner SHENZHEN JUFEI OPTOELECTRONICS CO LTD
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