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Europium-ion/manganese-ion-codoped barium yttrium phosphate red fluorescent powder and preparation method thereof

A technology of red fluorescent powder and yttrium barium phosphate, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., can solve the problems of low color rendering index, insufficient red light components, weak absorption, etc., and achieve high luminous intensity, low price, color pure effect

Inactive Publication Date: 2015-05-20
LUOYANG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to address the weak absorption of existing red phosphors in the near ultraviolet and blue light regions, and the YAG:Ce 3+ In the technology of yellow-emitting phosphors to realize white light, the red light components are insufficient and the color rendering index is low. To provide a phosphate-based red phosphor with high crystallinity, high luminous efficiency, simple preparation method and environmental protection and its preparation method

Method used

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  • Europium-ion/manganese-ion-codoped barium yttrium phosphate red fluorescent powder and preparation method thereof
  • Europium-ion/manganese-ion-codoped barium yttrium phosphate red fluorescent powder and preparation method thereof
  • Europium-ion/manganese-ion-codoped barium yttrium phosphate red fluorescent powder and preparation method thereof

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Embodiment 1

[0019] Get 3mol of barium carbonate, 0.44mol of yttrium oxide, 0.08mol of manganese carbonate, 0.02mol of europium oxide, and 3mol of ammonium dihydrogen phosphate to mix and grind evenly to obtain a mixture; the mixture is heated up to After pre-calcining at 300°C for 2 hours, cool naturally and grind to obtain calcined material; after calcining at 1150°C under air atmosphere for 8 hours, naturally cool and grind evenly, the chemical composition is Ba 3 Y 0.88 Eu 0.04 mn 0.08 (PO 4 ) 3 Phosphate-based red phosphors.

[0020] The Ba prepared in this example 3 Y 0.88 Eu 0.04 mn 0.08 (PO 4 ) 3 The X-ray powder diffraction pattern of the material sample is shown in the attached figure 1 a curve in figure 1 The b curve in is the X-ray powder diffraction pattern of the material sample prepared in Example 5 below. The absorption spectrogram of the material sample prepared in this embodiment is shown in the attached figure 2 , with image 3 Its luminescence spectr...

Embodiment 2

[0022] Take 3 mol of barium carbonate, 0.45 mol of yttrium oxide, 0.07 mol of manganous sulfate, 0.015 mol of europium oxide, and 3 mol of ammonium phosphate, mix and grind evenly to obtain a mixture; 0.5 hours, natural cooling and grinding to obtain calcined material; the calcined material was heated to 1150°C for 8 hours in an air atmosphere, naturally cooled and ground evenly, and the chemical composition was obtained as Ba 3 Y 0.9 Eu 0.03 mn 0.07 (PO 4 ) 3 Phosphate-based red phosphors. The phosphor has bright red emission under ultraviolet light irradiation.

Embodiment 3

[0024] Take 3 mol of barium chloride, 0.4 mol of yttrium oxide, 0.1 mol of manganous nitrate, 0.05 mol of europium oxide, and 3 mol of diammonium hydrogen phosphate, mix them, and grind them evenly to obtain a mixture; the mixture is heated in an air atmosphere Calcined at 400°C for 4 hours, naturally cooled and ground; calcined at 1250°C for 4 hours in an air atmosphere, cooled naturally, and ground evenly to obtain a chemical composition of Ba 3 Y 0.8 Eu 0.1 mn 0.1 (PO 4 ) 3 Phosphate-based red phosphors. The phosphor has bright red emission under ultraviolet light irradiation.

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Abstract

The invention discloses a europium-ion / manganese-ion-codoped barium yttrium phosphate red fluorescent powder and a preparation method thereof. The chemical formula of the fluorescent powder is Ba3Y[(1-x-y)]EuxMny(PO4)3, wherein x is 0.001-0.2, and y is 0.001-0.2. The preparation method adopts a high-temperature solid-phase process and comprises the following steps: respectively weighing a Ba<2+>-containing compound, a Y<3+>-containing compound, a Mn<2+>-containing compound a Eu<3+>-containing compound and a P<5+>-containing compound according to the stoichiometric proportion of the elements in the fluorescent powder chemical formula, grinding and mixing uniformly, presintering the obtained mixture at 300-500 DEG C for 0.5-4 hours, cooling, sintering at 1150-1350 DEG C for hours, and cooling. The phosphate-base red fluorescent powder can be effectively excited by near-ultraviolet light and blue light to emit the red light of which the main peak wavelength is 611nm, and has the advantages of high luminescent intensity and pure chroma; and the preparation method does not discharge wastewater or waste gas, and thus, is environment-friendly.

Description

technical field [0001] The invention relates to the field of lighting and display fluorescent materials and a preparation method thereof, in particular to a yttrium barium phosphate red fluorescent powder co-doped with europium ions and manganese ions and a preparation method thereof. Background technique [0002] Compared with incandescent lamps and energy-saving lamps widely used at present, solid-state lighting lamps based on LED (Light Emitting Diode) have many advantages such as energy saving, stability, and environmental protection. Therefore, the development of semiconductor lighting is conducive to solving the energy crisis and the environmental problems existing in the original incandescent lamps and energy-saving lamps. [0003] There are three main ways to realize white light LED: one is to combine red, green and blue LEDs to produce white light. However, the circuit design of this method is complicated and the cost is high. The second is to use quantum effects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81
Inventor 石冬梅赵营刚白晓华刘缙袁霄梅陈建刘明
Owner LUOYANG INST OF SCI & TECH
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