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Cerium-europium-doped yttrium aluminum garnet and method for preparing phosphor powder from same

A technology of yttrium aluminum garnet and phosphor powder is applied in chemical instruments and methods, luminescent materials, rare earth metal compounds, etc., can solve problems such as increasing production cost, and achieve the effects of short reaction time, excellent optical performance and simple reaction process

Inactive Publication Date: 2010-07-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above synthetic methods all need to be carried out under a reducing atmosphere with hydrogen, which increases the production cost

Method used

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  • Cerium-europium-doped yttrium aluminum garnet and method for preparing phosphor powder from same
  • Cerium-europium-doped yttrium aluminum garnet and method for preparing phosphor powder from same
  • Cerium-europium-doped yttrium aluminum garnet and method for preparing phosphor powder from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1.35 g of yttrium nitrate, 7.50 g of aluminum nitrate, 0.0526 g of cerium nitrate, and 0.0416 g of europium nitrate were dissolved in deionized water, and 0.44 g of polyethylene glycol was added. The solution was placed in a sealed autoclave, heated to 180° C. under the action of magnetic stirring, and kept for 30 minutes to obtain a precursor solution. The obtained precursor solution was sintered in an air atmosphere at 900°C for 10 minutes, the obtained sample was cooled to room temperature, washed with acid and alcohol, and sieved through a 400-mesh sieve to obtain YAG:Ce 3+ , Eu 3+ Powder.

Embodiment 2

[0029] 1.35 g of yttrium nitrate, 7.50 g of aluminum nitrate, 0.2104 g of cerium nitrate, and 0.1248 g of europium nitrate were dissolved in deionized water, and 1.76 g of polyethylene glycol was added. The solution was placed in a sealed autoclave, heated to 300° C. under the action of magnetic stirring, and kept for 30 minutes to obtain a precursor solution. The obtained precursor solution was sintered in an air atmosphere at 1100°C for 90 minutes, the obtained sample was cooled to room temperature, washed with acid and alcohol, and sieved through a 400-mesh sieve to obtain YAG:Ce 3+ , Eu 3+ Powder.

Embodiment 3

[0031] 1.35 g of yttrium nitrate, 7.50 g of aluminum nitrate, 0.1052 g of cerium nitrate, and 0.0832 g of europium nitrate were dissolved in deionized water, and 0.88 g of polyethylene glycol was added. The solution was placed in a sealed autoclave, heated to 220° C. under the action of magnetic stirring, and kept for 30 minutes to obtain a precursor solution. The obtained precursor solution was sintered in an air atmosphere at 1000°C for 40 minutes, the obtained sample was cooled to room temperature, washed with acid and alcohol, and sieved through a 400-mesh sieve to obtain YAG:Ce 3+ , Eu 3+ Powder.

[0032] Depend on figure 1 It can be seen that the doping mole percentage in YAG is 5%-20%Ce 3+ and 5%-15% by mole of Eu 3+ The basic structure of the substance will not be changed, and the xrd patterns of the samples of the three groups of examples can all correspond to the xrd patterns of the standard YAG.

[0033] Depend on figure 2 It can be seen that doping different...

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Abstract

The invention discloses cerium-europium-excited single-phase yttrium aluminum garnet phosphor powder and a preparation method thereof, which belong to the field of fluorescent energy saving technology. The grain diameter of the phosphor powder is less than or equal to 400 meshes; and the general formula of the cerium-europium-doped yttrium aluminum garnet is (Y(1-x-y)CexEuy)3Al5O12, wherein x is greater than 0.05 and less than 0.2 and y is greater than 0.05 and less than 0.15. The phosphor powder prepared by the invention can effectively absorb blue light of which the wavelength is 460nm and emit yellow and red composite light, can generate a light conversion white LED with a conventional GaN blue LED chip, and overcomes the defect that the conventional white LED lacks of a red light component.

Description

technical field [0001] The invention relates to a fluorescent powder material in the technical field of fluorescent energy-saving materials and a preparation method thereof, in particular to a yttrium aluminum garnet co-doped with cerium and europium and a method for preparing the fluorescent powder. Background technique [0002] Yttrium aluminum garnet, molecular formula Y 3 Al 5 o 12 , referred to as YAG, has high melting point, high hardness, high temperature, low creep rate and low electrical conductivity, and stable chemical and thermal properties. It is a very excellent high-temperature structural material and can be used in the fields of insulation and refractory materials. Cerium (Ce)-activated yttrium aluminum garnet, with an excitation spectrum around 460 nanometers (nm), can effectively absorb blue light from gallium nitride (GaN) light-emitting diodes (LEDs), and recombine with it to form high-brightness white light. This kind of semiconductor light-emitting d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80C01F17/00
Inventor 孙康李万万严小松
Owner SHANGHAI JIAO TONG UNIV
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