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A kind of multi-wavelength emitting phosphate phosphor and preparation method thereof

A fluorescent powder and phosphate technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high color temperature, low color rendering index, and can not be used as indoor lighting, etc., achieve small particle size, simple synthesis process, Good effect of chemical stability and thermal stability

Active Publication Date: 2020-08-14
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still has deficiencies so far, such as low color rendering index and high color temperature, so it cannot be used as indoor lighting

Method used

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  • A kind of multi-wavelength emitting phosphate phosphor and preparation method thereof
  • A kind of multi-wavelength emitting phosphate phosphor and preparation method thereof
  • A kind of multi-wavelength emitting phosphate phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of multi-wavelength emission phosphate phosphor, according to (Ca 18.999 Eu 0.001 )Zr(PO 4 ) 16 Weigh CaCO 3 , ZrO 2 , SiO 2 , NH 4 h 2 PO 4 and Eu 2 o 3 , the molar ratio between them is 18.999:1:16:0.0005. After fully grinding and mixing, place it in a corundum crucible, and then put it in a high-temperature furnace at 5% H 2 +95%N 2 (volume ratio) nitrogen-hydrogen mixed atmosphere, calcined at 1100° C. for 7 hours, and then cooled to room temperature to obtain multi-wavelength emitting phosphate phosphor.

[0019] figure 1 It is the excitation spectrum figure of the fluorescent powder of the present embodiment, and the excitation wavelength is 360nm, from figure 1 It can be seen from the figure that the emission of the phosphor powder in this embodiment is a mixed multi-wavelength emission of divalent and trivalent europium, and the emission peaks are located near 415 and 615 nm, indicating that the phosphor powder of this embodiment is suitable ...

Embodiment 2

[0021] A kind of multi-wavelength emission phosphate phosphor, according to (Ca 18.9 Eu 0.1 )Zr(PO 4 ) 16 Weigh CaCO 3 , ZrO 2 , SiO 2 , NH 4 h 2 PO 4 and Eu 2 o 3 , the molar ratio between them is 18.9:1:16:0.05. After fully grinding and mixing, place it in a corundum crucible, then put it into a high-temperature furnace under a CO atmosphere, bake at 1250°C for 2 hours, and then cool to room temperature. A multi-wavelength emitting phosphate phosphor is obtained.

[0022] figure 2 It is the excitation spectrum figure of the fluorescent powder of the present embodiment, and the excitation wavelength is 360nm, from figure 2 It can be seen from the figure that the emission of the phosphor powder in this embodiment is a mixed multi-wavelength emission of divalent and trivalent europium, and the emission peaks are located near 415 and 615 nm, indicating that the phosphor powder of this embodiment is suitable for multi-wavelength excitation by ultraviolet and purple ...

Embodiment 3

[0024] A kind of multi-wavelength emission phosphate phosphor, according to (Ca 18.95 Eu 0.05 )Zr(PO 4 ) 16 Weigh CaCO 3 , ZrO 2 , SiO 2 , NH 4 h 2 PO 4 and Eu 2 o 3 The molar ratio between them is 18.95:1:16:0.025. After fully grinding and mixing, place it in a corundum crucible, then put it in a high-temperature furnace under a CO atmosphere, and bake it at 1200°C for 5 hours, and then cool it to room temperature. A multi-wavelength emitting phosphate phosphor is obtained.

[0025] image 3 It is the excitation spectrum figure of the fluorescent powder of the present embodiment, and the excitation wavelength is 360nm, from image 3 It can be seen from the figure that the emission of the phosphor powder in this embodiment is a mixed multi-wavelength emission of divalent and trivalent europium, and the emission peaks are located near 415 and 615 nm, indicating that the phosphor powder of this embodiment is suitable for multi-wavelength excitation by ultraviolet and...

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Abstract

The invention relates to the technical field of rare earth luminescent materials and provides multi-wavelength emission phosphate fluorescent powder. The fluorescent powder has the chemical expressionformula shown as (Ca19-xEux)M(PO4)16; in the formula, x is 0.001-0.1, and M is selected from any one of Ti, Zr and Hf. The multi-wavelength emission phosphate fluorescent powder has the beneficial effects that phosphate is used as a matrix material, the fluorescent powder has high chemical stability and thermal stability, the raw material is low in cost and is easily available, and the sinteringtemperature is low.

Description

technical field [0001] The invention relates to the technical field of rare earth luminescent materials, in particular to a multi-wavelength emitting phosphate phosphor and a preparation method thereof. Background technique [0002] White light LED is a solid electroluminescent device that converts electrical energy into white light. It has the advantages of energy saving and environmental protection, high luminous efficiency, small size, long life, safety, and convenient use. The fourth-generation lighting source after the lamp is a green lighting source in the 21st century and a mainstream product in the future lighting market. [0003] At present, the realization of white LED is mainly through the following three ways: the combination of blue LED chips and yellow fluorescent materials; the combination of purple LED chips and three primary color fluorescent materials; the combination of blue LED chips and red and green fluorescent materials. These three methods are cheap ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81
Inventor 邓德刚吴铭张军杰田颖黄飞飞徐时清李晨霞
Owner CHINA JILIANG UNIV