Rare earth borate-based red fluorescent powder

A red phosphor, borate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of impure chromaticity, large light decay, low luminous efficiency, etc.

Active Publication Date: 2015-09-23
CENT SOUTH UNIV
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many units at home and abroad have devoted themselves to the research of rare earth borate red phosphors, and prepared a series of red phosphors for lamps and displays (Y 2 o 3 : Eu 3+ 、YBO 3 ...

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
  • Rare earth borate-based red fluorescent powder
  • Rare earth borate-based red fluorescent powder
  • Rare earth borate-based red fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: (In 0.88 , Al 0.03 ,Eu 0.09 )(Ca 0.94 ,Ba 0.06 )BO 4 Phosphor powder preparation

[0035] Weigh 0.9314g CaCO 3 , 0.1172g BaCO 3 , 1.0995g In 2 O 3 , 0.1425g Eu 2 O 3 , 0.0138g Al 2 O 3 and 0.6864g H 3 BO 3 Put it in an agate mortar and grind for 30 minutes to mix the ingredients evenly. Put the raw materials into a crucible and place them in a muffle furnace for pre-sintering (sintering temperature 600°C, heating rate 5°C / min, keep warm for 12 hours and then cool to room temperature with the furnace), and grind the pre-fired samples for 20 minutes before sintering Two-step final firing (the first stage sintering temperature is 1050°C, after 12 hours of heat preservation, cool to room temperature with the furnace, and grind for 10 minutes; the second stage sintering temperature is 1080°C, after 12 hours of heat preservation, cool to room temperature with the furnace, the heating rate of the two-step sintering both at 4°C / min). Take out the ...

Embodiment 2

[0036] Embodiment 2: (In 0.89 , Al 0.02 ,Eu 0.09 )(Ca 0.94 ,Ba 0.06 )BO 4 Phosphor powder preparation

[0037] Weigh 0.9314g CaCO 3 , 0.1172g BaCO 3 , 1.1119g In 2 O 3 , 0.1425g Eu 2 O 3 , 0.0092g Al 2 O 3 and 0.6864g H 3 BO 3 , the rest of the steps are the same as in Example 1.

Embodiment 3

[0038] Embodiment 3: (In 0.87 , Al 0.04 ,Eu 0.09 )(Ca 0.94 ,Ba 0.06 )BO 4 Phosphor powder preparation

[0039] Weigh 0.9314g CaCO 3 , 0.1172g BaCO 3 , 1.0870g In 2 O 3 , 0.1425g Eu 2 O 3 , 0.0184g Al 2 O 3 and 0.6864g H 3 BO 3 , the rest of the steps are the same as in Example 1.

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 rare earth borate-based red fluorescent powder. According to the fluorescent powder, CaInBO4 is used as a base body, 0.02-0.08 at.% of Al<3+> is doped to enter In<3+> bit, 0.02-0.08 at.% of Ba<2+> is doped to enter Ca<2+> bit and 0.07-0.10 at.% of Eu<3+> is doped to enter In<3+> bit, so that fluorescent powder (In(1-x-z), Alx, Euz)(Ca(1-y), Bay)BO4 is obtained, wherein x is equal to 0.02-0.04, y is equal to 0.05-0.07, and z is equal to 0.07-0.1. The rare earth borate-based red fluorescent powder provided by the invention has excellent properties of high luminous intensity, warm color, rapid decay, short persistence, good heat stability, easiness in long-term preservation and wide application range.

Description

technical field [0001] The invention relates to the field of rare earth luminescent materials, in particular to a rare earth borate-based red fluorescent powder which can be applied to trichromatic fluorescent lamps and plasma flat panel displays (PDP). Background technique [0002] Most of the current commercial light sources need to use phosphors for light conversion. Fluorescent lamps made of rare earth tricolor phosphors are very efficient and energy-saving new light sources. They are the key development direction of the world's lighting sources. There is a huge demand for primary color phosphors, and the supply is basically in short supply. Because the rare earth three-color fluorescent lamp has the characteristics of high luminous efficiency, low light decay and long life, it has been widely recognized and developed rapidly in the current environment where energy conservation and emission reduction are vigorously advocated. my country is also the world's largest produc...

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): C09K11/78
Inventor 蔡格梅刘红星刘华山金展鹏
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap