Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Europium-doped potassium carbonate yttrium red-light fluorescent powder and preparation method thereof

A technology of red fluorescent powder and potassium carbonate, which is applied in the direction of chemical instruments and methods, luminescent materials, climate sustainability, etc., can solve the problems of reduced luminous intensity, concentration quenching, and limited application range of fluorescent powder, and achieves transparent Good properties, improved luminous intensity, and high crystallinity

Active Publication Date: 2021-01-05
HUAIBEI NORMAL UNIVERSITY
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, phosphors have a certain doping limit of the luminescent center. When the doping amount is high, the concentration quenching effect will occur, and the luminous intensity will decrease, which limits the application range of phosphors to a certain extent.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Europium-doped potassium carbonate yttrium red-light fluorescent powder and preparation method thereof
  • Europium-doped potassium carbonate yttrium red-light fluorescent powder and preparation method thereof
  • Europium-doped potassium carbonate yttrium red-light fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Different Eu 3+ Concentration of KY 1-x (CO 3 ) 2 :xEu 3+ (x=0.1, 0.3,0.5) red phosphor.

[0036] 1) According to the stoichiometric ratio, weigh 3 parts of Y(NO 3 ) 3 ·6H 2 O and Eu(NO 3 ) 3 ·6H 2O, respectively dissolved in 3mL deionized water, marked as x=0.1, x=0.3 and x=0.5, set aside;

[0037] 2) The weighed 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0038] 3) The Y(NO) prepared in step 1 3 ) 3 ·6H 2 O and Eu(NO 3 ) 3 ·6H 2 The mixed aqueous solution of O was added dropwise to the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0039] 4) Adjust the pH value of the mixed solution to 9.5 with dilute nitric acid;

[0040] 5) Pour the stirred mixed solution into three reaction kettles respectively, and heat at 200°C for 12h.

[0041] 6) After the reaction kettle was naturally cooled, the precipitate was washed with alcohol and deionized water, and the obtained precipitate was ...

Embodiment 2

[0044] Prepare KY under the condition of pH=10, 240℃-8h 1-x (CO 3 ) 2 :xEu 3+ (x=0.05) red phosphor

[0045] 1) Weigh 0.95mmol of Y(NO 3 ) 3 ·6H 2 O and 0.05mmol of Eu(NO 3 ) 3 ·6H 2 O raw material, dissolved in 3mL deionized water, set aside;

[0046] 2) The weighed 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0047] 3) The Y(NO) prepared in step 1 3 ) 3 ·6H 2 O and Eu(NO 3 ) 3 ·6H 2 The mixed aqueous solution of O was added dropwise to the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0048] 4) Adjust the pH value of the mixed solution to 10 with dilute nitric acid;

[0049] 5) Pour the stirred mixed solution into the reaction kettle and heat at 240°C for 8h.

[0050] 6) After the reaction kettle is naturally cooled, wash the precipitate with alcohol and deionized water, and place the obtained precipitate in 80 ℃ Dry in an oven for 5 hours until completely dry to obtain the target pr...

Embodiment 3

[0053] Prepare KY under the condition of pH=9, 180℃-12h 1-x (CO 3 ) 2 :xEu 3+ (x=0.05) red phosphor

[0054] 1) Weigh 0.95mmol of Y(NO 3 ) 3 ·6H 2 O and 0.05mmol of Eu(NO 3 ) 3 ·6H 2 O raw material, dissolved in 3mL deionized water, set aside;

[0055] 2) The weighed 12mmol of K 2 CO 3 Dissolve in 20mL deionized water and stir vigorously with a magnetic stirrer;

[0056] 3) The Y(NO) prepared in step 1 3 ) 3 ·6H 2 O and Eu(NO 3 ) 3 ·6H 2 The mixed aqueous solution of O was added dropwise to the stirring K 2 CO 3 In the aqueous solution, stir vigorously;

[0057] 4) Adjust the pH value of the mixed solution to 9 with dilute nitric acid;

[0058] 5) Pour the stirred mixed solution into the reaction kettle and heat at 160°C for 12h.

[0059] 6) After the reaction kettle is naturally cooled, wash the precipitate with alcohol and deionized water, and place the obtained precipitate in 80 ℃ Dry in an oven for 5 hours until completely dry to obtain the target pr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses europium-doped potassium carbonate yttrium red-light fluorescent powder and a preparation method thereof, the chemical general formula of the fluorescent powder is KY<1-x> (CO<3>)<2>: xEu < 3 + >, and x is more than 0 and less than 0.6. The fluorescent powder can effectively absorb exciting light within the range of 260-400 nm, particularly has strong absorption to purple light and long-wave ultraviolet light, can be accurately matched with an existing commercial purple light LED chip, and emits high-intensity red light with main peak positions of 591 nm, 617 nm and 702nm. Meanwhile, the red light luminous intensity of the fluorescent powder can be improved by increasing the concentration of Eu < 3 + > according to actual requirements, and the fluorescent powder does not have a concentration quenching phenomenon. The fluorescent powder is high in crystallinity, high in fluorescence emission intensity, simple in preparation method and simple in required equipment, is a novel red-light fluorescent material, and can be widely applied to the fields of decoration, illumination, counterfeiting prevention and the like.

Description

technical field [0001] The invention relates to a europium-doped potassium yttrium carbonate red fluorescent powder and a preparation method thereof, belonging to the technical field of rare earth ion luminescence. Background technique [0002] Phosphor powder needs to meet two conditions to be able to emit light: [0003] 1. A suitable luminescent substrate, the substrate can be self-excited to emit light or not; [0004] 2. Luminescent center, which can be rare earth ions, or other metal ions or defects. [0005] The existing commercial red phosphor is Y 2 o 3 :Eu 3+ , the phosphor is at Y 2 o 3 Eu 3+ The glowing center emits red light. In addition, the red phosphor has Gd 2 o 3 :Eu 3+ , GdMgB 5 o 10 : Ce 3+ ,Mn 2+ , (SrMg) 3 (PO 4 ) 2 :Sn 2+ And other relatively mature systems, these phosphors have a wide range of applications in lighting and display. [0006] However, phosphors have a certain doping limit of the luminescent center. When the doping amo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K11/77
CPCC09K11/7783Y02B20/00
Inventor 李德川方振国朱光平钱成铎卞海洋吴佳静
Owner HUAIBEI NORMAL UNIVERSITY
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com