Title:
LIMINOUS OXIDE HAVING STUFFED TRIDYMITE TYPE OR KALIPHILITE TYPE STRUCTURE AND OXIDE LUMINOPHOR
Document Type and Number:
Japanese Patent JP3883296
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a luminous oxide which shows excellent heat resistance and chemical stability, is useful for a luminophor of a high luminance capable of emitting light of colors from blue to yellow and shows afterglow by using a compound oxide having a specific composition.
SOLUTION: An oxide to be used has a stuffed tridymite type structure having a composition of M1M22O4 or a kaliphilite type structure having a composition of M1M32O4 (wherein M1 is an alkaline earth metal element selected from Ca, Sr and Ba; M2 is a metal element selected from Al and Ga; and M3 is Si, Mg or Zn). Further, the alkaline earth metal element M1 of the oxide is substituted by a divalent ion of europium or a trivalent ion of other rare earth metal element provided that the substitution ratio is not more than 30 mol.% of the sum of the alkaline earth metal element ions.
Inventors:
Endo Tadashi
Kyota Ueda
Hirokazu Takizawa
Kyota Ueda
Hirokazu Takizawa
Application Number:
JP19069098A
Publication Date:
February 21, 2007
Filing Date:
July 06, 1998
Export Citation:
Assignee:
Japan Science and Technology Agency
International Classes:
C09K11/08; C09K11/64; C09K11/59; C09K11/66; H01J11/42; H01J17/04; (IPC1-7): C09K11/64; C09K11/08; C09K11/59; H01J17/04
Domestic Patent References:
| JP11302641A | ||||
| JP11061116A | ||||
| JP2166192A | ||||
| JP49038434B1 |
Other References:
Victor Abbruscato,Optical and Electrical Properties of SrAl2O4:Eu2+,Journal of the Electrochemical Society,1971年 7月30日,vol.118, No.6,930-933
Attorney, Agent or Firm:
Toshio Nishizawa
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