Title:
LIGHT-EMITTING GLASS, LIGHT-EMITTING DEVICE EQUIPPED WITH THE LIGHT-EMITTING GLASS, AND PROCESS FOR PRODUCING LIGHT-EMITTING GLASS
Document Type and Number:
WIPO Patent Application WO/2011/052514
Kind Code:
A1
Abstract:
Provided is a light-emitting glass which is applicable to, e.g., white illuminators including a light-emitting diode as a light source, and which emits light of a warm white color when irradiated with near ultraviolet light and combines long-term weatherability with high heat resistance. Also provided are a light-emitting device equipped with the light-emitting glass and a process for producing the light-emitting glass.
The light-emitting glass includes, as the base glass, borosilicate or silicate glass having a separated-phase structure, whereby the base glass is efficiently doped with, for example, transition metal ion clusters which emit light of a warm white color upon irradiation with near ultraviolet light. With this glass, it is possible to attain increases in excitation wavelength and emission wavelength. The glass thus emits, based on a multiple scattering effect, high-intensity light of a warm white color upon irradiation with near ultraviolet light. Furthermore, since the light-emitting glass includes borosilicate or silicate glass, which is a common glass material, as the constituent material, it is possible to inexpensively provide a fluorescent material combining long-term weatherability with respect to ultraviolet rays, etc. with resistance to high temperatures.
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Inventors:
YASUMORI ATSUO (JP)
KISHI TETSUO (JP)
MATSUI NAOKO (JP)
KISHI TETSUO (JP)
MATSUI NAOKO (JP)
Application Number:
PCT/JP2010/068755
Publication Date:
May 05, 2011
Filing Date:
October 22, 2010
Export Citation:
Assignee:
UNIV TOKYO SCI EDUC FOUND (JP)
YASUMORI ATSUO (JP)
KISHI TETSUO (JP)
MATSUI NAOKO (JP)
YASUMORI ATSUO (JP)
KISHI TETSUO (JP)
MATSUI NAOKO (JP)
International Classes:
C03C4/12; C03C3/089
Foreign References:
| JPH10236843A | 1998-09-08 | |||
| JP2007112975A | 2007-05-10 |
Other References:
ATSUO YASUMORI: "Eu-dope Na2O-B2O3-SiO2-kei Bunso Glass no Hakko Kyodo", THE CERAMIC SOCIETY OF JAPAN KANTO BRANCH KENKYU HAPPYOKAI KOEN YOSHISHU, vol. 22, 2006, pages 55
E.VERNAZ: "FRACTURE TOUGHNESS-COMPOSITION RELATIONSHIP IN SOME BINARY AND TERNARY GLASS SYSTEMS", JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 37, 1980, pages 359 - 365, XP024064748, DOI: doi:10.1016/0022-3093(80)90071-X
DU PIYI ET AL.: "KINETICS OF PHASE SEPARATION OF SODA- LIME-SILICA GLASS WITH MINOR P205 ADDITIONS", JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 112, 1989, pages 251 - 257, XP024062870, DOI: doi:10.1016/0022-3093(89)90531-0
E.VERNAZ: "FRACTURE TOUGHNESS-COMPOSITION RELATIONSHIP IN SOME BINARY AND TERNARY GLASS SYSTEMS", JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 37, 1980, pages 359 - 365, XP024064748, DOI: doi:10.1016/0022-3093(80)90071-X
DU PIYI ET AL.: "KINETICS OF PHASE SEPARATION OF SODA- LIME-SILICA GLASS WITH MINOR P205 ADDITIONS", JOURNAL OF NON-CRYSTALLINE SOLIDS, vol. 112, 1989, pages 251 - 257, XP024062870, DOI: doi:10.1016/0022-3093(89)90531-0
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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