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

Fluorescent substances for vacuum ultraviolet radiation laser light-emitting devices

A technology of vacuum ultraviolet rays and fluorescent materials, which is applied in the field of fluorescent materials and can solve problems such as insufficient brightness and reduced brightness

Inactive Publication Date: 2007-09-12
SUMITOMO CHEM CO LTD
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Such fluorescent materials comprising silicates still have the problem of insufficient brightness and reduction in brightness due to exposure to plasma
[0007] The object of the present invention is to provide a fluorescent material for vacuum ultraviolet radiation excitation light-emitting devices, which can emit light with relatively high brightness, and after exposure to plasma, the brightness has a small decrease

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh the raw material, i.e. calcium carbonate (CaCO produced by WAKOJUNYAKU Co., Ltd. 3 ), strontium carbonate (SrCO produced by WAKOJUNYAKU Co., Ltd. 3 ), europium oxide (Eu 2 o 3 ), basic magnesium carbonate (produced by WAKOJUNYAKU Co., Ltd. (MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O) and silicon oxide (SiO produced by WAKO JUNYAKU Co., Ltd. 2 ), and mixed together so that CaCO 3 : SrCO 3 :Eu 2 o 3 :(MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O: SiO 2 The molar ratio is 0.9215:0.0485:0.015:0.2:2. At 1200°C, with 2% (volume) H content 2 The resulting mixture was calcined for 2 hours under Ar flow, then ground, and then at 1200°C in a 2% (volume) content of H 2 Calcined for 2 hours under Ar flow. Thus, by the formula Ca 0.9215 Sr 0.485 Eu 0.03 MgSi 2 o 6 Indicates the composition of the fluorescent material. When this fluorescent material is under pressure of 6.7Pa (5×10 -2 Torr) or lower in a vacuum chamber, when irradiated with ultraviolet radiation using an exciter 146-n...

Embodiment 2

[0038] Weigh the raw material, i.e. strontium carbonate (SrCO produced by WAKOJUNYAKU Co., Ltd. 3 ), barium carbonate (BaCO produced by WAKOJUNYAKU Co., Ltd. 3 ), europium oxide (Eu 2 o 3 ), basic magnesium carbonate (produced by WAKOJUNYAKU Co., Ltd. (MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O) and silicon oxide (SiO produced by WAKO JUNYAKU Co., Ltd. 2 ), and mixed together so that SrCO 3 : BaCO 3 :Eu 2 o 3 :(MgCO 3 ) 4 Mg(OH) 2 ·5H 2 O: SiO 2 The molar ratio is 2.28:0.57:0.075:0.2:2. At 1200°C, with 2% (volume) H content 2 The resulting mixture was calcined under an Ar atmosphere for 2 hours. From this we get the formula Sr 2.28 Ba 0.57 Eu 0.15 MgSi 2 o 8 Indicates the composition of the fluorescent material. When this fluorescent material is under pressure of 6.7Pa (5×10-2 Torr) or lower in a vacuum chamber, when irradiated with ultraviolet radiation using an exciter 146-nm lamp (model: H0012 produced by USHIODENKI Co., Ltd.), it emits a luminance of 30cd / m 2 Blu-...

Embodiment 3

[0040] Weigh the raw material, i.e. barium carbonate (BaCO3 produced by KANTOKAGAKU Co., Ltd. 3 ), europium oxide (Eu 2 o 3 ), magnesium oxide (MgO produced by KANTOKAGAKU Co., Ltd.), and silicon oxide (SiO 2 ), and mixed together so that BaCO 3 :Eu 2 o 3 :MgO:SiO 2 The molar ratio is 1.98:0.01:1:2. Add 0.1 mole of B to 1 mole of product 2 o 3 As a flux, the resulting mixture was thoroughly wet mixed in acetone with a mortar and then dried. The mixed raw material thus obtained was placed in a stainless steel mold, and then pressurized at 40 MPa to form pellets with a size of 15 mm (diameter) x 3 mm (thickness). The obtained pellets were placed in an aluminum crucible, and heated at 1200 °C under H 2 , Ar composition ratio of 5%: 95% (volume) atmosphere for calcination for 3 hours. From this we get the formula Ba 1.98 Eu 0.02 MgSi 2 o 7 Indicates the composition of the fluorescent material. When this fluorescent material is under pressure of 6.7Pa (5×10 -2 Torr...

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

A fluorescent substance for vacuum ultraviolet radiation excited light-emitting devices which emits light with a high luminance and is subject to only a small decrease in luminance due to exposure to plasma or the like, and a vacuum ultraviolet radiation excited light-emitting device including the fluorescent substance, are provided by way of a fluorescent substance for vacuum ultraviolet radiation excited light-emitting devices including: a compound represented by the general formula: mM<1>O.nM<2>O.2M<3>O2, wherein M<1> is at least one metal selected from Ca, Sr and Ba, M<2> is at least one metal selected from Mg and Zn, M<3> is at least one metal selected from Si and Ge, and m and n satisfy 0.5 is either at least two metals selected from Ca, Sr and Ba or one of Sr and Ba; and at least one metal selected from Eu and Mn as an activator, and a vacuum ultraviolet radiation excited-light-emitting device including the fluorescent substance.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of September 27, 2001 and an application number of 01137167.6, and the title of the invention is "A Fluorescent Material for a Vacuum Ultraviolet Radiation Excitation Light-Emitting Device". technical field [0002] The present invention relates to fluorescent materials suitable for use in vacuum ultraviolet radiation excited light emitting devices such as plasma display panels (hereinafter referred to as "PDPs") and rare gas lamps. Background technique [0003] Fluorescent materials that emit light when excited with vacuum ultraviolet radiation etc. include, for example, BaMgAl 10 o 17 : Eu, which contains Ba, Mg, Al, O, and an activator (Eu) as a blue fluorescent material for a vacuum ultraviolet radiation-excited light-emitting device, and Zn 2 SiO 4 : Mn containing Zn, Si, O and an activator (Mn) as a green fluorescent material. Also, for example (Y,Gd)BO 3 : ...

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): C09K11/78H01J17/49
Inventor 户田健司佐藤峰夫大野庆司宫崎进武田隆史
Owner SUMITOMO CHEM CO LTD
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