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A kind of bismuth and europium ion co-activated titanoaluminate phosphor and its preparation and application

A technology of titanium aluminate and europium ions, which is applied in the field of inorganic fluorescent materials and displays, can solve problems such as low thermal stability, low fluorescence efficiency, and easy thermal quenching, and achieve reduced energy consumption and cost, high luminous intensity, and particle size uniform effect

Inactive Publication Date: 2021-01-15
XIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These reported phosphors still have certain shortcomings, such as low thermal stability, easy thermal quenching of luminescence, low fluorescence efficiency, etc.

Method used

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  • A kind of bismuth and europium ion co-activated titanoaluminate phosphor and its preparation and application
  • A kind of bismuth and europium ion co-activated titanoaluminate phosphor and its preparation and application
  • A kind of bismuth and europium ion co-activated titanoaluminate phosphor and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: Sr 0.915 Bi 0.08 Eu 0.005 Ti 3 Al 8 o 19

[0034] According to the chemical formula Sr 0.915 Bi 0.08 Eu 0.005 Ti 3 Al 8 o 19 The stoichiometric ratio of each element in (x=0.08, y=0.005), respectively weigh strontium carbonate SrCO 3 : 0.2702 grams, bismuth nitrate Bi (NO 3 ) 3 ·5H 2 O: 0.0776 grams, europium nitrate hexahydrate Eu(NO 3 ) 3 ·6H 2 O: 0.0045 g, tetrabutyl titanate C 16 h 36 o 4 Ti: 2.0419 g, aluminum chloride AlCl 3 : 2.1334 g, strontium carbonate SrCO 3 Dissolve in nitric acid, add 0.5274 grams of citric acid, stir until completely transparent; bismuth nitrate pentahydrate Bi(NO 3 ) 3 ·5H 2 O was dissolved in nitric acid, 0.0461 g of citric acid was added, and stirred until completely transparent; europium nitrate hexahydrate Eu(NO 3 ) 3 ·6H 2 O was dissolved in deionized water, added 0.0029 g of citric acid, stirred until completely transparent; tetrabutyl titanate C 16 h 36 o 4 Ti and a certain amount of glacial...

Embodiment 2

[0040] Example 2: Sr 0.925 Bi 0.06 Eu 0.015 Ti 3 Al8 o 19

[0041] According to the chemical formula Sr 0.925 Bi 0.06 Eu 0.015 Ti 3 Al 8 o 19 (x=0.06, y=0.015) in the stoichiometric ratio of each element, weigh strontium nitrate Sr (NO 3 ) 2 : 0.3915 g, bismuth oxide Bi 2 o 3 : 0.0280 g, europium nitrate hexahydrate Eu(NO 3 ) 3 ·6H 2 O: 0.0134 g, titanium sulfate Ti (SO 4 ) 2 : 1.4399 grams, aluminum nitrate nonahydrate Al (NO 3 ) 3 9H 2 O: 6.0021 grams, the strontium nitrate Sr (NO 3 ) 2 Dissolve in deionized water, add 0.5332 grams of citric acid, stir until completely transparent; bismuth oxide Bi 2 o 3 Dissolve in nitric acid, add 0.0173 grams of citric acid, stir until completely transparent; Europium nitrate hexahydrate Eu(NO 3 ) 3 ·6H 2 O was dissolved in nitric acid, added 0.0086 g of citric acid, stirred until completely transparent; titanium sulfate Ti(SO 4 ) 2 Dissolve in deionized water, add 1.7293 grams of oxalic acid, stir to form a t...

Embodiment 3

[0044] Example 3: Sr 0.94 Bi 0.05 Eu 0.010 Ti 3 Al 8 o 19

[0045] According to the chemical formula Sr 0.94 Bi 0.05 Eu 0.010 Ti 3 Al 8 o 19 (x=0.05, y=0.010) in the stoichiometric ratio of each element, respectively weigh strontium chloride hexahydrate SrCl 2 ·6H 2 O: 0.2980 g, bismuth nitrate pentahydrate Bi(NO 3 ) 3 ·5H 2 O:0.0485g, europium oxide Eu 2 o 3 : 0.0035 g, tetrabutyl titanate C 16 h 36 o 4 Ti: 2.0419 g, aluminum chloride AlCl 3 : 2.1334 g, strontium chloride hexahydrate SrCl 2 ·6H 2 O was dissolved in deionized water, added 0.3386 oxalic acid, stirred until completely transparent; Bismuth nitrate pentahydrate Bi(NO 3 ) 3 ·5H 2 O was dissolved in nitric acid, 0.0180 g of oxalic acid was added, and stirred until completely transparent; europium oxide Eu 2 o 3 Dissolve in nitric acid, add 0.0018 g of oxalic acid, stir until completely transparent; tetrabutyl titanate C 16 h 36 o 4 Ti and a certain amount of glacial acetic acid were mix...

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Abstract

The invention relates to bismuth and europium ion co-activated titanium aluminate fluorescent powder as well as preparation thereof and application thereof, and belongs to the field of inorganic materials. A chemical composition of the bismuth and europium ion co-activated titanium aluminate fluorescent powder is shown as the following formula: Sr(1-x-y)BixEuyTi3Al8O19, wherein x is a molar ratioof an activator Bi<3+> ions, y is a molar ratio of an activator Eu<3+> ions, x is greater than or equal to 0.005 and smaller than or equal to 0.080, and y is greater than or equal to 0.005 and smallerthan or equal to 0.10. The titanium aluminate fluorescent powder with a pure phase and excellent luminescence property is obtained through a sol-gel process, the material source is wide, and blue light and white light can be obtained by regulating doping concentration of bismuth ions Bi<3+> and europium ions Eu<3+> under ultraviolet excitation, so that light-emitting strength is high, and stability and color rendering property are good.

Description

technical field [0001] The invention belongs to the technical field of inorganic fluorescent materials and displays, and in particular relates to a bismuth and europium ion co-activated titanoaluminate fluorescent powder and its preparation and application, which are suitable for ultraviolet fluorescent lamp lighting and display. Background technique [0002] In recent years, white light-emitting diodes (WLEDs) have gained extensive research and commercial applications in the fields of lighting and display due to their high luminous efficiency, long lifetime, and environmental friendliness. In general, the leading commercial strategy for producing white LEDs is to combine blue InGaN LED chips with yellow phosphor (Y 3 Al 5 o 12 : Ce 3+ ) is packaged with epoxy resin or silicon wafer, however, white LED devices based on this phosphor have very low color rendering index (CRI, Ra<80) and high color temperature (CCT) due to the lack of red spectral components ≈7750K), whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67F21V9/30H01L33/50
CPCC09K11/7734F21V9/30H01L33/504Y02B20/00
Inventor 邓斌陈俊刘卉周崇松
Owner XIANGNAN UNIV