Inorganic oxide and phosphor

Details Inorganic oxide and phosphor Inorganic oxide and phosphor

2006-04-18

2006-04-18

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C252S30140F

Reexamination Certificate

active

07029602

ABSTRACT:
The present invention provides an inorganic oxide made of MLn2QR4O12, where M is at least one element selected from the group consisting of Mg, Ca, Sr, and Ba; Ln is at least one rare earth element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; Q is at least one element selected from the group consisting of Si, Ge, Sn, and Pb,; and R is at least one element selected from the group consisting of B, Al, Ga, In, and Tl. This inorganic oxide serves as a phosphor or a phosphor host and if it contains ions capable of being the luminescent center, it becomes a phosphor emitting fluorescent light. Thus, a novel oxide that can be a phosphor host of a high efficiency phosphor or the phosphor itself and a novel phosphor are provided.

REFERENCES:
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Phosphor Research Society, 1999, “Phosphor Handbook” (English language version), CRC Press LLC, USA, pp. 359-444.
Phosphor Research Society, 1987, “Fluorescent Handbook”, (English language version), Ohmsha, Japan, pp. 192-240.
Geller et al. 1959, “J. Phys. Chem. Solids”, Pergamon Press, Great Britain, vol. 12, pp. 111.
Baldassare Di Bartolo, 1978, “Luminescence of Inorganic Solids”, Plenum Press, New york, pp. 527-528.
JCPDS-International Centre for Diffraction Data, 2000, “Powder Diffraction File: Alphabetical Indexes for Experimental Patterns” pages related to the chemical elements Ca, Ba, Mg, Sr only.

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