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

LED (light-emitting diode) fluorescent powder with broadband gradient and preparation method thereof

A phosphor, broadband technology, used in the field of LED solid-state lighting systems

Inactive Publication Date: 2014-12-17
HUNAN SCI & TECH RES & DEV CENT
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Table 1 Comparison of advantages and disadvantages of phosphor powder preparation methods

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
  • LED (light-emitting diode) fluorescent powder with broadband gradient and preparation method thereof
  • LED (light-emitting diode) fluorescent powder with broadband gradient and preparation method thereof
  • LED (light-emitting diode) fluorescent powder with broadband gradient and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] Example 1 Preparation of YAG series broadband gradient phosphor powder

[0093] 1. Raw materials and reagents:

[0094] Yttrium oxide (Y 2 o 3 ≥99.99%) or yttrium nitrate (Y(NO 3 ) 3 ·6H 2 O≥99.99%); cerium nitrate (Ce(NO) 3 ·6H 2 O, analytically pure); aluminum nitrate (Al(NO 3 ) 3 9H 2 O, analytically pure); gallium nitrate (Ga(NO 3 ) 3 9H 2 O, analytically pure), gadolinium nitrate (Gd(NO 3 ) 3 ·6H 2 O, analytically pure), concentrated nitric acid HNO 3 , analytically pure; absolute ethanol, C 2 h 5 OH, analytically pure; distilled water H 2 O; ammonium bicarbonate (NH 4 HCO 3 , analytically pure); ammonia water (NH 3 ·H 2 O, analytically pure); polyethylene glycol (PEG1000)

[0095] 2. Experimental equipment

[0096] Conventional glass apparatus; dryer; pure water system; fully automatic electronic analytical balance; constant temperature magnetic stirrer; electric heating constant temperature water tank; pH acidity meter; Drying box; agate ...

Embodiment 2

[0142] BSS–A, BSS-B series broadband gradient phosphor preparation process such as Figure 7 with Figure 8 Shown:

[0143] 1 Raw materials and reagents:

[0144] Barium oxide (BaO≥99.99%) or barium nitrate (Ba(NO 3 ) 2 ≥99.99%); strontium oxide (SrO≥99.99%) or strontium nitrate (Sr(NO 3 ) 2 ≥99.99%); europium nitrate (Eu(NO 3 ) 3 6H2O, analytically pure); ethyl orthosilicate (Si(OC 2 h 5 ) 4 , analytically pure); concentrated nitric acid HNO 3 , analytically pure; absolute ethanol, C 2 h 5 OH, analytically pure; distilled water H 2 O; ammonium bicarbonate (NH 4 HCO 3 , analytically pure); ammonia water (NH 3 ·H 2 O, analytically pure); polyethylene glycol (PEG1000)

[0145] 2 experimental equipment

[0146] Conventional glass apparatus; dryer; pure water system; fully automatic electronic analytical balance; constant temperature magnetic stirrer; electric heating constant temperature water tank; pH acidity meter; Drying box; agate mortar; high-temperature ...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
luminous efficiencyaaaaaaaaaa
Login to View More

Abstract

The invention provides an LED (light-emitting diode) fluorescent powder with broadband gradient and a preparation method thereof. A single particle of the fluorescent powder sequentially comprises more than three layers of fluorescent materials with the same crystal structure and different chemical components from inside to outside. According to the preparation method, a microwave heating-homogeneous precipitation technology is adopted for preparing several pure phase micro nanoscale or nanoscale fluorescent powders with the same crystal structure and different components, and then the micro-sized fluorescent powder grain is taken as a seed crystal, the micro-sized fluorescent powder grain is mixed with the pure phase micro nanoscale or nanoscale fluorescent powder, epitaxial growth is conducted sequentially step by step at high temperature, or the micro-sized fluorescent power grain is taken as a seed crystal, a mononuclear multilayered shell structure precursor with the same crystal structure and different components is formed through liquid phase coprecipitation, epitaxial growth is conducted sequentially step by step at high temperature, and then the LED fluorescent powder with broadband gradient is obtained through grinding. The LED fluorescent powder with broadband gradient has a special structure and components, good dispersibility, high bulk density, strong scattering intensity, and high luminous efficiency.

Description

technical field [0001] The invention relates to an LED solid-state lighting system and its application, in particular to a broadband gradient LED fluorescent powder and a preparation method thereof. Background technique [0002] Due to its small size, high brightness, low power consumption (1 / 8 to 1 / 10 of incandescent bulbs, 1 / 2 of energy-saving fluorescent lamps), long life (more than 120,000 hours), high efficiency, low heat, and environmental protection ( No Hg, Pb and other pollution), can start at low voltage and low current, fast response, shock resistance, planar packaging, easy to develop into ultra-thin and short products and other advantages. It has experienced 50 years of development since its invention and is widely used in construction. Landscape lighting, large-screen display, traffic lights, indicator lights, large and small backlights for TVs, mobile phones and digital cameras, solar LED lighting, automotive lighting, special lighting and military and many ot...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80C09K11/59
Inventor 李廷凯钟真张拥军陈建国唐冬汉虞爱民谭丽霞李勇
Owner HUNAN SCI & TECH RES & DEV CENT
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