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Manganese-cerium codoped yttrium aluminum garnet fluorescent powder material and preparation method and application thereof

A technology of yttrium aluminum garnet and fluorescent powder is applied in the field of LED fluorescent materials to achieve the effects of improving luminescence performance, high excitation and emission efficiency, and stable physicochemical properties

Inactive Publication Date: 2012-02-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no patent has disclosed YAG phosphor materials containing Mn transition elements co-doped

Method used

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  • Manganese-cerium codoped yttrium aluminum garnet fluorescent powder material and preparation method and application thereof
  • Manganese-cerium codoped yttrium aluminum garnet fluorescent powder material and preparation method and application thereof
  • Manganese-cerium codoped yttrium aluminum garnet fluorescent powder material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Preparation of a molecular formula Y 2.94 Al 5 o 12 : Ce 0.06 , Y 2.94 Al 4.94 o 12 : Ce 0.06 .Mn 0.06 The doped yttrium aluminum garnet phosphor, which is prepared as follows:

[0021] In the first step, weigh 2.83g of 3N Y 2 o 3 , and 15.77 g Al 2 o 3 According to the molar ratio of 1:1, add concentrated nitric acid and heat to dissolve to prepare mixed solution 1 with a concentration of 1.2M; weigh 0.22g of analytically pure cerium nitrate, dissolve it in deionized water, and prepare mixed solution 2. Mix the mixed solution 1 and the mixed solution 2 to obtain the precursor solution 1.

[0022] In the second step, weigh 2.73g Y of 3N 2 o 3 , and 15.64 g Al 2 o 3 According to the molar ratio of 1:1, add concentrated nitric acid to heat and dissolve, and prepare a mixed solution with a concentration of 1.2M. Three; weigh 0.24g of analytically pure cerium nitrate, dissolve it in deionized water, and prepare a mixed solution. Four; weigh 0.04g ...

Embodiment 2

[0026] Example 2: Preparation of a molecular formula Y 2.94 Al 5-x o 12 : Ce 0.06 .Mn x (x=0.02, 0.04, 0.06, 0.08) doped yttrium aluminum garnet phosphor, which is prepared as follows:

[0027] The first step, according to phosphor Y 2.94 Al 5-x o 12 : Ce 0.06 .Mnx (x=0.02,0.04,0.06,0.08) The amount of substance is 0.01mol and weighed 3N Y 2 o 3 、Al 2 o 3 , and analytically pure cerium nitrate, MnO 2 . Y will be weighed 2 o 3 and Al 2 o 3 According to the molar ratio of 1:1, add concentrated nitric acid to heat and dissolve, and prepare mixed solution 1 with a concentration of 1.2M; dissolve cerium nitrate in deionized water to prepare mixed solution 2; weigh an appropriate amount of MnO 2 , according to the molar ratio of 1:1, add concentrated hydrochloric acid and heat to dissolve to obtain mixed solution 3. The mixed solution 1, the mixed solution 2 and the mixed solution 3 are mixed to obtain a precursor solution.

[0028] The second step is to prepare a...

Embodiment 3

[0031] Example 3: Preparation of a molecular formula Y 2.94 Al 5 o 12 : Ce 0.06 , Y 2.94 Al 4.94 o 12 : Ce 0.06 .Mn 0.08 The doped yttrium aluminum garnet phosphor, which is prepared as follows:

[0032] In the first step, weigh 2.83g of 3N Y 2 o 3 , and 15.77 g Al 2 o 3 According to the molar ratio of 1:1, concentrated nitric acid was added and heated to dissolve to prepare mixed solution 1 with a concentration of 1.2M; 0.22g of analytically pure cerium nitrate was weighed and dissolved in deionized water to prepare solution 2. Mix solution 1 and solution 2 to obtain precursor solution 1.

[0033] In the second step, weigh 2.73g Y of 3N 2 o 3 , and 15.60 g Al 2 o 3 According to the molar ratio of 1:1, add concentrated nitric acid to heat and dissolve, and prepare a mixed solution with a concentration of 1.2M. Three; weigh 0.26g of analytically pure cerium nitrate, dissolve it in deionized water, and prepare a solution four; weigh 0.06g of MnO 2 , according to...

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Abstract

The invention relates to a manganese-cerium codoped yttrium aluminum garnet fluorescent powder material and a preparation method and application thereof. The fluorescent powder material has a general chemical formula of Y3-xAl5-yG12:Cex, Mny. The preparation method particularly comprises the following steps of: weighing raw materials according to a molar ratio of Y2O3 to Al2O3 to cerous nitrate to MnO2 of 1.49:2.49:0.01:(0.01 to 1.4):2.4:0.1:0.1; mixing the raw materials to obtain precursor solution; stirring and ensuring the ion concentration of the precursor solution in the range of 0.15 to 1.0M; weighing and dissolving a proper amount of ammonium bicarbonate in the specification of analytical reagent into deionized water to prepare ammonium bicarbonate solution of 2 to 5M; under the magnetic stirring condition and at room temperature, slowly dropwise adding the prepared ammonium bicarbonate solution in the mixed precursor solution of 200 to 500ml at a dropwise adding speed of 0.8 to 10ml / min; after completing titrating, continuously stirring for 2 to 10 hours to obtain white coprecipitate; aging and carrying out vacuum filtration; and drying and calcining to obtain the required fluorescent powder material. The fluorescent powder material prepared by the preparation method disclosed by the invention has high laser emitting efficiency, high luminous intensity, stable physical property, good dispersibility and high thermal conductivity, can be applied to a high-power white light LED (light-emitting diode) and has the obvious advantages of optimizing the luminescence of the white light packaging LED.

Description

technical field [0001] The invention belongs to the technical field of LED fluorescent materials, in particular to a manganese-cerium co-doped yttrium-aluminum garnet (Y 3-x Al 5-y G 12 : Ce x ,Mn y ) Phosphor material, preparation method and application thereof. Background technique [0002] As the fourth-generation lighting source, LED has the advantages of small size, low power consumption, long life, environmental protection, and easy development into thin and compact products. Its luminous characteristics will surpass the traditional lighting sources of incandescent lamps and fluorescent lamps, and its application prospects are very broad. At present, the manufacture of high-efficiency, high color rendering index, low color temperature, and high-power white LEDs has become an urgent need for LED development, especially the performance of fluorescent materials, such as excitation efficiency, luminous efficiency, uniformity, and physical and chemical stability. At pr...

Claims

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Application Information

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IPC IPC(8): C09K11/80H01L33/50
Inventor 向卫东赵寅生钟家松杨海龙王京蔡文
Owner TONGJI UNIV