Antimonate-based red phosphor powder and preparation method and application thereof

A technology of red fluorescent powder and antimonate, which is applied in the direction of chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of complex synthesis process, low luminous efficiency, poor stability, etc., and achieve simple preparation process and good color rendering Sexuality and granularity, easy-to-manipulate effects

Inactive Publication Date: 2014-03-12
ANHUI XINDE CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high crystallinity, good luminous quality and preparation method to overcome the existing red fluorescent powder with low luminous efficiency, poor stability, complex synthesis process and high cost under the excitation of ultraviolet and blue light. Safe conditions, simple preparation process, low cost, safe and pollution-free antimonate-based red phosphor, which can emit red light efficiently and stably under the excitation of ultraviolet, near ultraviolet to blue light, so as to promote the wide application of inorganic light-emitting materials

Method used

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  • Antimonate-based red phosphor powder and preparation method and application thereof
  • Antimonate-based red phosphor powder and preparation method and application thereof
  • Antimonate-based red phosphor powder and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of LiLa 1.9 Eu 0.1 SbO 6

[0037] According to the chemical formula LiLa 1.9 Eu 0.1 SbO 6 The stoichiometric molar ratio of each element in the element is weighed lithium carbonate Li 2 CO 3 : 0.2463 g, lanthanum oxide La 2 o 3 : 2.0635 g, europium oxide Eu 2 o 3 : 0.1174 g, antimony trioxide Sb 2 o 3 : 0.9718 g, after grinding and mixing in an agate mortar, select the air atmosphere for the first calcining, the temperature is 350 ° C, the calcining time is 5 hours, then cool to room temperature, take out the sample; the raw materials calcined for the first time are fully Mix and grind evenly, then calcinate again in the air atmosphere, the temperature is 850°C, the calcining time is 9 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in the muffle furnace for air calcining, the calcining temperature is 1250°C, The calcining time is 10 hours, and the powdery antimonate red luminescent material...

Embodiment 2

[0043] Preparation of LiLa 1.8 Eu 0.2 SbO 6

[0044] According to the chemical formula LiLa 1.8 Eu 0.2 SbO 6 , Weigh lithium carbonate Li 2 CO 3 : 0.2463 g, lanthanum oxide La 2 o 3 : 1.9549 grams, europium sulfate Eu 2 (SO 4 ) 3 ·H 2 O: 0.3948 g, antimony trioxide Sb 2 o 3 : 0.9718 g, after grinding and mixing in an agate mortar, select the air atmosphere for the first calcination, the temperature is 425 ° C, the calcination time is 6 hours, then cool to room temperature, take out the sample; the raw material calcined for the first time is fully Mix and grind evenly, then calcinate again in the air atmosphere, the temperature is 700°C, the calcining time is 7 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in the muffle furnace for air calcining, the calcining temperature is 950°C, The calcination time is 5 hours, and the powdery antimonate red luminescent material is obtained. Its main structural properti...

Embodiment 3

[0047] Preparation of LiLa 1.6 Eu 0.4 SbO 6

[0048] According to the chemical formula LiLa 1.6 Eu 0.4 SbO 6 , Weigh lithium carbonate Li 2 CO 3 : 0.2469 g, lanthanum oxide La 2 o 3 : 1.7377 g, Europium nitrate Eu(NO 3 ) 3 ·6H 2 O: 1.1896 g, antimony trioxide Sb 2 o 3 : 0.9718 g, after grinding and mixing in an agate mortar, select the air atmosphere for the first calcination, the temperature is 375 ° C, the calcination time is 6 hours, then cool to room temperature, take out the sample; the raw material for the first calcination is fully Mix and grind evenly, then calcinate again in the air atmosphere, the temperature is 500°C, the calcining time is 8 hours, then cool to room temperature, take out the sample; finally it is fully ground again and placed in the muffle furnace for air calcining, the calcining temperature is 1125°C, The calcining time is 9 hours, and the powdery antimonate red luminescent material is obtained. Its main structural properties, excita...

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Abstract

The invention discloses antimonate-based red phosphor powder. The antimonate-based red phosphor powder is characterized in that the chemical formula of the antimonate-based red phosphor powder is LiLa[2-2x]Eu2xSbO6, wherein x is a molar ratio coefficient by doping of Eu<3+> substituting for La<3+>, and the data range of x is greater than or equal to 0.001 and less than or equal to 0.6. The red phosphor powder is a fluorescent synthetic material with high luminous efficiency, has relatively high crystallinity and visible light permeability, can emit pure red light with main wavelength of 614 nanometer under the excitation of ultraviolet, near ultraviolet and blue light; being cooperated with green phosphor powder, the red phosphor powder can be coated on a blue light LED (light emitting diode) chip for preparing a novel white light LED. The invention also provides a preparation method for the antimonate-based red phosphor powder. According to the preparation method, the source of raw materials is abundant, the cost of the raw materials is low, and the preparation method is simple and is easy to operate; in the preparing process, the materials do not need to be protected by inert gases or reducing atmosphere, so that energy consumption and product cost are obviously lowered. Compared with other sulfides and halides, the antimonate-based red phosphor powder product is easy to collect, no waste water and no waste gas are discharged, and the antimonate-based red phosphor powder is environment-friendly.

Description

technical field [0001] The invention relates to a luminescent material and its preparation method and application, in particular to a novel antimonate-based red fluorescent powder that emits a red fluorescence under the excitation of ultraviolet light, near ultraviolet light to blue light, which can be coated with Coated and packaged on the InGaN diode, it is applied to various lighting, display and photoluminescent chromaticity adjustment using ultraviolet, near ultraviolet and blue light as excitation sources, and belongs to the technical field of inorganic light emitting materials. Background technique [0002] White light LED is a high-profile green light source in the 21st century. It has broad market and application prospects. It has low working voltage, low power consumption, stable performance, long life, strong impact resistance and vibration resistance, light weight, small size Low cost, fast luminous response and other advantages. The use of near-ultraviolet 350-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L33/50
Inventor 黄彦林王婧祁淑云魏东磊
Owner ANHUI XINDE CHEM FIBER
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