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Luminescent glass

Foreign code F110004040
File No. K05316EP
Posted date Jul 8, 2011
Country EPO
Application number 03812326
Gazette No. 1566367
Gazette No. 1566367
Date of filing Nov 28, 2003
Gazette Date Aug 24, 2005
Gazette Date Jan 7, 2015
International application number JP2003015208
International publication number WO2004050576
Date of international filing Nov 28, 2003
Date of international publication Jun 17, 2004
Priority data
  • 2003JP015208 (Nov 28, 2003) WO
  • P2002-349153 (Nov 29, 2002) JP
  • P2003-128325 (May 6, 2003) JP
  • P2003-128333 (May 6, 2003) JP
Title Luminescent glass
Abstract The present invention provides a process for producing a luminescent glass, comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of elements of Groups IIIA, IVA, VA, VIA, VIIA, VIII, IB, IIB and IVB of the Periodic Table; and thereafter heating the porous glass in a reducing atmosphere.
The luminescent glass obtained by the process is excellent in heat resistance, chemical durability, mechanical strength and other properties, and exhibits strong luminescence when irradiated with UV light or the like.
The glass can be effectively used as a luminous body for lighting systems, display devices, etc.
Scope of claims [claim1]
1. A luminescent glass obtained by a process comprising the steps of adsorbing, to a porous high silica glass, at least one metal component selected from the group consisting of Sc, Y, La, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Tm, Lu, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Tc and Re; and thereafter heating the porous glass in a reducing atmosphere, and further comprising, before the heating step, the step of adsorbing, to the porous glass, at least one element selected from the group consisting of B, N, F, Al, and P as a sensitizer component;
the luminescent glass comprising at least 96 wt.-% of SiO 2, 0.5 to 3 wt.-% of B 2O 3, 0.1 to 1.5 wt.-% of Al 2O 3, and 50 to 2000 ppm of at least one metal component selected from the group consisting of Sc, Y, La, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Tm, Lu, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Tc and Re.
[claim2]
2. A luminescent glass according to Claim 1, wherein the metal component to be adsorbed to the porous high silica glass is at least one member selected from the group consisting of elements of the fourth period of the Periodic Table, elements of the fifth period of the Periodic Table, La, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Tm, and Lu, the elements of the fourth period of the Periodic Table and the elements of the fifth period of the Periodic Table being selected from the metal components of claim 1.
[claim3]
3. A luminescent glass according to Claim 2, wherein the metal component to be adsorbed to the porous high silica glass is at least one member selected from the group consisting of V, Cr, Mn and Tb.
[claim4]
4. A luminescent glass according to Claim 1, wherein the metal component to be adsorbed to the porous high silica glass is at least one metal component selected from the group consisting of Sc, Y, La, Pr, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Tm, and Lu.
[claim5]
5. A luminescent glass according to Claim 1, wherein the metal component to be adsorbed to the porous high silica glass is at least one metal component selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Tc and Re.
[claim6]
6. A luminescent glass according to Claim 1, wherein the heating temperature is 900 to 1600 deg.C.
[claim7]
7. A luminescent glass according to Claim 1, wherein the sensitizer component is Al.
[claim8]
8. A luminescent glass according to Claim 1, wherein the porous high silica glass is obtained by causing phase separation of an alkali borosilicate glass by heat treatment and then treating the phase-separated glass with an acid.
[claim9]
9. A lighting system for use in water or air, comprising the luminescent glass of Claim 1, and an ultraviolet light source.
[claim10]
10. A lighting system comprising the luminescent glass of Claim 1 disposed in water; an ultraviolet light source placed outside water; and an optical fiber provided so that one end of the optical fiber connected to the ultraviolet light source and the other end is located in the vicinity of the luminescent glass.
[claim11]
11. A display device comprising, as a luminous body, the luminescent glass of Claim 1.
  • Applicant
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
  • Inventor
  • CHEN DANPING
  • AKAI TOMOKO
IPC(International Patent Classification)
Reference ( R and D project ) PRESTO Conversion and Control by Advanced Chemistry AREA
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