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a europium ion eu 3+ Activated fluoroantimonate orange-red phosphor and preparation method thereof

A fluoroantimonate and europium ion technology is applied in the field of luminescent materials to achieve the effects of simple preparation method, strong absorption and high luminous efficiency

Active Publication Date: 2021-03-02
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research upsurge of phosphors doped with rare earth ions and based on fluoride has been at a high level at home and abroad, but the phosphors based on fluoroantimonate have not yet been disclosed or reported.

Method used

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  • a europium ion eu <sup>3+</sup> Activated fluoroantimonate orange-red phosphor and preparation method thereof
  • a europium ion eu <sup>3+</sup> Activated fluoroantimonate orange-red phosphor and preparation method thereof
  • a europium ion eu <sup>3+</sup> Activated fluoroantimonate orange-red phosphor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of Ca 4 Sr 2.925 Eu 0.075 [Sb 12 o 36 ]F 2 : According to the chemical formula Ca 4 Sr 2.925 Eu 0.075 [Sb 12 o 36 ]F 2 The stoichiometric ratio of each element is weighed separately Raw materials: calcium fluoride CaF 2 : 0.521g, strontium carbonate SrCO 3 : 0.720g, europium oxide Eu 2 o 3 : 0.022g, antimony pentoxide Sb 2 o 5 : 3.235g, strontium carbonate, europium oxide and antimony pentoxide are placed in a mortar, a small amount of acetone is added to fully grind and mix uniformly to obtain a mixture; the mixture is pre-calcined in an air atmosphere, and the pre-calcining temperature is 750°C. The calcination time is 8h, after cooling to room temperature, add 0.521g of calcium fluoride, fully grind and mix evenly, after tableting treatment, calcine under air atmosphere, calcination temperature is 850°C, calcination time is 12h, and naturally cool to room temperature to obtain A europium ion Eu 3+ Activated fluoroantimonate orange-red pho...

Embodiment 2

[0037] Preparation of Ca 4 Sr 2.637 Eu 0.363 [Sb 12 o 36 ]F 2 : According to the chemical formula Ca 4 Sr 2.637 Eu 0.363 [Sb 12 o 36 ]F 2 The stoichiometric ratio of each element is weighed separately Raw materials: calcium carbonate CaCO 3 : 0.667g, strontium fluoride SrF 2 : 0.552g, europium oxide Eu 2 o 3 : 0.106g, antimony pentoxide Sb 2 o 5 : 3.235g, put calcium carbonate, europium oxide and antimony pentoxide in a mortar and grind them thoroughly and mix them uniformly to obtain a mixture; pre-calcine the mixture under an air atmosphere, the pre-calcination temperature is 850°C, and the pre-calcination time is 5h , after cooling to room temperature, add 0.552g of strontium fluoride, fully grind and mix evenly, after tableting, calcining in air atmosphere, the calcining temperature is 900°C, the calcining time is 10h, and a kind of europium ion is obtained after natural cooling to room temperature Eu 3+ Activated fluoroantimonate orange-red phosphor.

[...

Embodiment 3

[0040] Preparation of Ca 4 Sr 1.74 Eu 1.26 [Sb 12 o 36 ]F 2 : According to the chemical formula Ca 4 Sr 1.74 Eu 1.26 [Sb 12 o 36 ]F 2 The stoichiometric ratio of each element is weighed respectively Raw materials: calcium hydroxide Ca(OH) 2 : 0.495g, strontium fluoride SrF 2 : 0.364g, europium nitrate hexahydrate Eu(NO 3 ) 3 ·6H 2 O: 0.937g, antimony pentoxide Sb 2 o 5 : 3.235g, calcium hydroxide, europium nitrate hexahydrate and antimony pentoxide are placed in a mortar, a small amount of acetone is added to fully grind and mix uniformly to obtain a mixture; the mixture is pre-calcined in an air atmosphere, and the pre-calcined temperature is 700°C, pre-calcination time is 10h, after cooling to room temperature, add 0.364g of strontium fluoride, fully grind and mix evenly, calcined in air atmosphere after tableting, calcining temperature is 1150°C, calcining time is 5h, natural cooling After reaching room temperature, a europium ion Eu 3+ Activated fluoroant...

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Abstract

The invention discloses a europium ion Eu 3+ Activated fluoroantimonate orange-red phosphor and preparation method thereof, chemical formula is Ca 4 Sr 3‑3x Eu 3x [Sb 12 o 36 ]F 2 , where the active ion is europium ion Eu 3+ , x is Eu 3+ doped Sr 2+ The molar ratio of bits, 0.025≤x≤0.6. The phosphor powder prepared by the invention has small particles and uniform distribution, good dispersion, good crystallinity, high luminous efficiency, good stability, and purer orange-red fluorescence chromaticity; Under the excitation of ultraviolet light, it emits pure orange-red light, and the luminous wavelength is mainly 590nm. It can be widely used as a fluorescent material for preparing white light LEDs; during preparation, the compounds containing the elements required for the synthesis of luminescent materials are mixed in proportion, and the high-temperature solid-phase method is used. The preparation is prepared by repeated calcination, and has the advantages of simple preparation method, low requirement for equipment, and environmental friendliness.

Description

technical field [0001] The invention relates to a fluorescent material and a preparation method thereof, in particular to a europium ion Eu 3+ An activated fluoroantimonate orange-red fluorescent powder and a preparation method thereof belong to the technical field of luminescent materials. Background technique [0002] White LED is the fourth-generation lighting source after incandescent lamps, fluorescent lamps and energy-saving lamps. Compared with traditional lighting methods, it has strong moisture resistance, long life, low power consumption, small size, less heat generation, and low operating temperature. The advantage is that it is a green and environment-friendly lighting device, which is widely used in full-color displays, traffic lights and other lighting fields. High-efficiency blue LEDs based on InGaN have been commercialized, using blue InGaN chips and (Y,Gd) 3 (Al,Gd) 5 o 12 : Ce 3+ Yttrium aluminum garnet yellow phosphor can be packaged into a white LED,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/75
CPCY02B20/00
Inventor 唐惠东杨蓉
Owner CHANGZHOU VOCATIONAL INST OF ENG
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