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

Europium and manganese codoped and activated blue-green fluorescent powder and preparation method thereof

A fluorescent powder, blue-green technology, applied in the field of blue-green fluorescent powder and its preparation

Inactive Publication Date: 2011-07-20
CHINA JILIANG UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current development trend, the light conversion type is superior to other methods in terms of feasibility, practicability and commercialization, and with the rapid development of ultraviolet and near ultraviolet high-power LED chips, white light LEDs excited by ultraviolet or near ultraviolet will be developed rapidly, and currently there are few blue phosphors or blue-green phosphors that can be efficiently excited by ultraviolet or near-ultraviolet light

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 and manganese codoped and activated blue-green fluorescent powder and preparation method thereof
  • Europium and manganese codoped and activated blue-green fluorescent powder and preparation method thereof
  • Europium and manganese codoped and activated blue-green fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0018] 2. A blue-green fluorescent powder preparation method activated by co-doping of europium and manganese, characterized in that it comprises the following steps:

[0019] ①According to the general chemical formula Ba 1-x Sr 1-y al 10 o 17 :xEu 2+ ,yMn 2+ Calculate separately, weigh the reagent (barium carbonate BaCO 3 (A.R.) (A.R. means analytical grade), strontium oxide SrO (A.R.), aluminum nitrate nonahydrate Al (NO 3 ) 3 9H 2 O (99.99%), manganese carbonate MnCO 3 (A.R.) and europium oxide Eu 2 o 3 (purity 99.99%) fully mix these components;

[0020] ②Sinter the above mixture in a high-temperature furnace, the atmosphere is hydrogen, the sintering temperature is 1000-1400°C, and the sintering time is 3-8 hours;

[0021] ③ Grinding the above-mentioned sintered material, grinding and sieving, the fineness is 200-400 mesh;

[0022] ④ Wash and filter with deionized water at 50-100°C, and dry at 100-150°C to obtain the desired product.

[0023] 3. A method for...

Embodiment 1

[0026] Implementation example 1: the chemical formula is: Ba 0.92 Sr 0.96 al 10 o 17 :0.08Eu 2+ , 0.04Mn 2+ ;

[0027] Preparation method: according to the chemical formula Ba 0.92 Sr 0.96 al 10 o 17 :0.08Eu 2+ , 0.04Mn 2+ Weigh barium carbonate BaCO 3 (A.R.) (A.R. means analytical grade), strontium oxide SrO (A.R.), aluminum nitrate nonahydrate Al (NO 3 ) 3 9H 2 O (99.99%), manganese carbonate MnCO 3 (A.R.) and europium oxide Eu 2 o 3 (purity 99.99%); they were mixed in a mortar with 5% NH 4 Cl flux was mixed, and a small amount of absolute ethanol was added to mix and grind for 2 hours to make it fully mixed; the above mixture was dried and put into a corundum crucible, compacted, and placed in a high-temperature box furnace at a temperature of 100°C / hour. The temperature was ramped up to 1300°C and held for 5 hours. After cooling, take it out and crush, grind, and sieve to a fineness of 400 mesh. Then wash and filter several times with deionized water at...

Embodiment 2

[0029] Implementation example 2: the chemical formula is: Ba 0.92 Sr 0.98 al 10 o 17:0.08Eu 2+ , 0.02Mn 2+ ;

[0030] Preparation method: according to the chemical formula Ba 0.92 Sr 0.98 al 10 o 17 :0.08Eu 2+ , 0.02Mn 2+ Weigh barium carbonate BaCO 3 (A.R.) (A.R. means analytical grade), strontium oxide SrO (A.R.), aluminum nitrate nonahydrate Al (NO 3 ) 3 9H 2 O (99.99%), manganese carbonate MnCO 3 (A.R.) and europium oxide Eu 2 o 3 (purity 99.99%); they were mixed with a small amount of absolute ethanol in a mortar and ground for 2 hours to make them fully mixed; the above mixture was dried and packed into a corundum crucible, compacted, placed in a high-temperature box furnace, The temperature was raised to 1350°C at a rate of 100°C / hour and maintained for 4 hours. After cooling, take it out and crush, grind, and sieve to a fineness of 400 mesh. Then wash and filter several times with deionized water at about 80°C, bake in an oven at 120°C for 5 hours, a...

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 and manganese codoped and activated blue-green fluorescent powder and a preparation method thereof, which belong to the technical field of rare-earth luminescent materials. The blue-green fluorescent powder is characterized in that: the chemical general formula is Ba1-xSr1-yAl10O17:xEu<2+>, yMn<2+>, wherein x is between 0.01 and 0.2 and y is between 0.01 and 0.1. The preparation method comprises the following steps of: weighing reagents such as barium carbonate BaCO3 (A.R.) (A.R. refers to analytically pure), strontium oxide SrO (A.R.), aluminum nitrate nonahydrate Al(NO3)3.9H2O (99.99 percent), manganese carbonate MnCO3 (A.R.) and europium oxide Eu2O3 (with the purity of 99.99 percent); uniformly grinding; sintering at high temperature; smashing; grinding; screening; washing with water; and drying to obtain the fluorescent powder. The fluorescent powder can be combined with an ultraviolet or near-ultraviolet LED wafer to prepare a high-color-renderingwhite-light LED (Light-Emitting Diode), and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of rare earth luminescent materials. Specifically, the invention relates to a blue-green fluorescent powder activated by co-doping of europium and manganese and a preparation method thereof. Background technique [0002] White LEDs have the characteristics of long life, power saving, adjustable light control, vibration resistance, low voltage drive, and no environmental pollution. There are three main forms of white LEDs: light conversion type, multi-color combination type and multi-quantum dot conversion type. The light conversion type is to use LED to excite other luminescent materials to mix and form white light. It can also be divided into using blue LEDs to excite YAG yellow phosphors to produce white light; or using purple or ultraviolet LEDs to excite red, green, and blue phosphors to produce white light. The multi-color combination type refers to the red, green, blue three (or more) color LEDs are ...

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): C09K11/64H01L33/50
CPCY02B20/181Y02B20/00
Inventor 沈常宇钟川李可金永兴王剑锋侯强龙金尚忠
Owner CHINA JILIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com