Aluminate red phosphor activated by manganese ion and preparation method thereof

A red phosphor and aluminate technology, applied in the field of red phosphor and its preparation, can solve the problems affecting the commercialization of nitride phosphors, difficult to match with LED chips, etc., achieving low cost, easy operation, and improved crystal lattice. The effect of stability
CN103146381BActive Publication Date: 2015-07-01GUANGDONG INST OF RARE METALS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG INST OF RARE METALS
Publication Date
2015-07-01

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Abstract

The invention provides an aluminate red phosphor activated by manganese ion and a preparation method thereof. A feature chemical general formula of the red phosphor is that M1-xAl12O19-2xA2x: Mnx, wherein M is at least one type of Mg, Ca, Sr or Ba, A is C1 or F and 0<x<=0.1. The preparation method comprises the steps: oxide of the Mg, the Ca, the Sr, the Ba or the Mn or relative salt, aluminum oxide, halide containing Cl iron and F iron are accurately weighed according to a ratio of the general formula, evenly mixed with a fluxing agent, sintered for 1 hour to 2 hours at the temperature of 600 DEG C-800 DEG C and then sintered for 4 hours to 10 hours at the temperature of 1500 DEG C-1630 DEG C. The powder obtained after sintering is smashed, washed, screened, water-powder-separated and dried so that the aluminate red phosphor activated by the manganese ion is obtained. The red phosphor is capable of emitting red light rays of 620 nm-700 nm under action of light of 250 nm-500 nm and has the advantages that in the range from ultraviolet to a visible region, absorption is performed by a board band, emitting is performed by a narrow band and color purity is high. The red phosphor is suitable for ultraviolet and a blue ray light emitting diode (LED) chip.
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Description

technical field

[0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a red fluorescent powder activated by tetravalent manganese ions that can be effectively excited by ultraviolet and blue LED chips and a preparation method thereof. Background technique

[0002] White light LED semiconductor solid-state lighting technology with high efficiency, low energy consumption and long life is considered a major breakthrough in the field of lighting and display in the 21st century, and is considered to be the fourth generation of light sources after incandescent lamps. It has low working voltage, high luminous efficiency, long life, stable performance, and no pollution. It has been highly valued by various countries and has gradually entered the practical stage. At present, there are mainly three ways to realize white LED. The first is to directly assemble white light from red, green, and blue LED chips; the second is to coat the ...

Claims

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