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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

Active Publication Date: 2013-06-12
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since raw materials that cannot exist stably in the air are used in the preparation process, such as: EuN, CeN, etc., the mixing and grinding of raw materials must be completed in a dry glove box filled with high-purity nitrogen, so it seriously affects the nitride fluorescence. commercialization of powder
for Eu 3+ Activated phosphor, due to its absorption in the near ultraviolet region from Eu 3+ forbidden f - f Transition absorption is narrow-band absorption, which is difficult to match with LED chips

Method used

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  • Aluminate red phosphor activated by manganese ion and preparation method thereof
  • Aluminate red phosphor activated by manganese ion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Ca 0.99 Al 12 o 18.98 Cl 0.02 :Mn 0.01

[0019] Weigh 0.4904g of calcium carbonate, 3.0588g of aluminum oxide, 0.0058g of manganese carbonate, 0.0056g of anhydrous calcium chloride, and 0.0107g of boric acid, mix them uniformly, put them into a corundum crucible, put them into a high-temperature furnace, and sinter at 800°C for 1 hour, take it out after cooling, grind the calcined product and then sinter at 1630°C for 4 hours, pulverize the sintered product, wash it with deionized water, pass through a 400-mesh sieve, and separate the water and powder, dry the filter cake at 120°C, that is Aluminate red phosphor activated by manganese ions is obtained. The excitation and emission spectra of the phosphor at room temperature are shown in figure 1 , whose color coordinates are shown in figure 2 .

Embodiment 2

[0020] Example 2 Ca 0.999 Al 12 o 18.998 f 0.002 :Mn 0.001

[0021] Weigh 0.4994g of calcium carbonate, 3.0588g of alumina, 0.0006g of manganese carbonate, 0.0004g of calcium fluoride, and 0.0107g of boric acid, mix them evenly, put them into a corundum crucible, put them into a high-temperature furnace, and sinter at 800°C for 1 hour. Take it out after cooling, grind the calcined product and then sinter at 1630°C for 4 hours, crush the sintered product, wash it with deionized water, pass through a 400 mesh sieve, separate the water and powder, and dry the filter cake at 120°C to obtain manganese ions Activated aluminate red phosphor.

Embodiment 3

[0022] Example 3 Ca 0.89 Mg 0.1 Al 12 o 18.98 Cl 0.02 :Mn 0.01

[0023] Weigh respectively 0.4454g of calcium carbonate, 0.0202g of magnesium oxide, 3.0588g of aluminum oxide, 0.0058g of manganese carbonate, 0.0053g of ammonium chloride, and 0.0035g of boric acid. Sinter at ℃ for 1 hour, take it out after cooling, grind the burnt product and then sinter at 1630°C for 6 hours, crush the sintered product, wash with deionized water, pass through a 400-mesh sieve, separate the water and powder, and dry the filter cake at 120°C , that is, the aluminate red phosphor activated by manganese ions is obtained.

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64
Inventor 张秋红倪海勇王灵利
Owner GUANGDONG INST OF RARE METALS
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