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Preparation method and application of Eu<2+> doped fluorate luminescent material

A technology of luminescent materials and fluoride salts, which is applied in the direction of luminescent materials, chemical instruments and methods, electrical components, etc., can solve the problems of high cost, poor stability, complex synthesis process, etc., achieve pure chromaticity, low synthesis temperature, and The effect of simple process

Active Publication Date: 2016-06-22
徐州博创建设发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The currently developed blue phosphors excited by europium ions for LEDs mainly include phosphate-based, vanadate-based, borate-based, and oxyfluoride-based compounds, which are limited by the disadvantages of poor stability, high cost, and complex synthesis processes. Application in LED

Method used

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  • Preparation method and application of Eu&lt;2+&gt; doped fluorate luminescent material
  • Preparation method and application of Eu&lt;2+&gt; doped fluorate luminescent material
  • Preparation method and application of Eu&lt;2+&gt; doped fluorate luminescent material

Examples

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Embodiment 1

[0032] Preparation of Ca 1.9998 Eu 0.0002 NbO 6 f

[0033] According to the chemical formula Ca 1.9998 Eu 0.0002 NbO 6 F, respectively weigh niobium pentoxide Nb 2 o 5 : 1.33 g, europium oxide Eu 2 o 3 : 0.0004 g. niobium pentoxide Nb 2 o 5 and europium oxide Eu 2 o 3 After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first calcination, the temperature is 350 ° C, the calcination time is 3 hours, then cool to room temperature, and take out the sample; the raw materials for the first calcination are fully mixed and ground again, Sinter again in the air atmosphere, the temperature is 600 ° C, the calcination time is 8 hours, then cool to room temperature, take out the sample; then weigh the calcium fluoride CaF 2 : 1.56 g, added to the obtained mixture, fully ground again, placed in a muffle furnace, and calcined under a carbon powder reducing atmosphere, the calcining temperature is 850 ° C, and the calcining time is 10 hours...

Embodiment 2

[0040] Preparation of Ca 1.998 Eu 0.002 NbO 6 f

[0041] According to the chemical formula Ca 1.998 Eu 0.002 NbO 6 F, weigh calcium carbonate CaCO 3 : 2.00 g, niobium pentoxide Nb 2 o 5 : 1.33 g. CaCO 3 and niobium pentoxide Nb 2 o 5 After grinding and mixing uniformly in an agate mortar, select the air atmosphere for the first calcination, the temperature is 380 ° C, the calcination time is 4 hours, then cool to room temperature, and take out the sample; the raw materials for the first calcination are fully mixed and ground again, Sinter again in the air atmosphere, the temperature is 500°C, the calcination time is 5 hours, then cool to room temperature, take out the sample; then weigh europium fluoride EuF 3 : 0.0042 g, added to the obtained mixture, fully ground again, placed in a muffle furnace, and calcined under a carbon powder reducing atmosphere, the calcining temperature is 600 ° C, and the calcining time is 5 hours, and the powdery fluoride salt is obtain...

Embodiment 3

[0048] Preparation of Ca 1.99 Eu 0.01 NbO 6 f

[0049] According to the chemical formula Ca 1.99 Eu 0.01 NbO 6 F, respectively weigh calcium oxide CaO: 1.12 grams, europium nitrate Eu (NO 3 ) 3 ·6H 2 O: 0.045 g. Calcium oxide CaO and europium nitrate Eu(NO 3 ) 3 ·6H 2 After grinding and mixing uniformly in an agate mortar, choose the air atmosphere for the first calcination, the temperature is 400 ° C, the calcination time is 4 hours, then cool to room temperature, take out the sample; the raw materials for the first calcination are fully mixed and ground again , re-sintered in the air atmosphere, the temperature was 450 ° C, the calcination time was 6 hours, then cooled to room temperature, and the sample was taken out; then weighed niobium pentafluoride NbF 5 : 1.88 g, added to the obtained mixture, fully ground again, placed in a muffle furnace, and calcined under a carbon powder reducing atmosphere, the calcining temperature was 650 ° C, and the calcining time ...

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Abstract

The invention discloses a preparation method and application of a Eu<2+> doped fluorate luminescent material. Fluorescent powder is a rare earth ion activated fluorate material, the chemical formula is Ca2Nb2O6F, x represents the doping amount of Eu<2+>, and the value range of the x is larger than or equal to 0.0001 and smaller than or equal to 0.15. According to the fluorate luminescent material, the fluorate blue fluorescent powder gives out blue light of which the wave length ranges from 400 nanometers to 480 nanometers under excitation of ultraviolet light and can be applied to various lighting display taking the ultraviolet light as an excitation source and photoluminescence chrominance adjustment. According to the preparation method and application of the Eu<2+> doped fluorate luminescent material, a high temperature solid state method is adopted, the fluorescent powder which is uniform in granularity, good in dispersibility, high in luminous efficiency and good in chemical stability is obtained, the preparation method has low requirements on production cost and equipment, and industrial production is easy to carry out.

Description

technical field [0001] The invention relates to a preparation method and application of a luminescent material, in particular to a Eu 2+ The preparation method and application of a doped fluoride-based luminescent material belong to the technical field of inorganic luminescent materials. Background technique [0002] In recent years, white LEDs have attracted attention and become a new generation of green, environmentally friendly and energy-saving lighting sources. Due to the simple synthesis, stable performance, low cost and fast luminous response of phosphor powder for W-LED, it has been studied by more and more people, and the new luminescent material doped with rare earth ions has also become an important part of materials science and lighting display. research hotspots in the field. [0003] From the perspective of human lighting history, white LED is known as the fourth-generation lighting source that is most likely to replace traditional lighting equipment (such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/85H01L33/50
CPCC09K11/7728H01L33/502
Inventor 乔学斌
Owner 徐州博创建设发展集团有限公司
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