METHOD FOR PREPARING A B-SiAION PHOSPHOR
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Abstract
There is provided a method for preparing a β-SiAlON phosphor capable of be controlled to show characteristics such as high brightness and desired particle size distribution. The method for preparing a β-SiAlON phosphor represented by Formula: Si(6-x)AlxOyN(8-y):Lnz (wherein, Ln is a rare earth element, and the following requirements are satisfied: 0<x≦4.2, 0<y≦4.2, and 0<z≦1.0) includes: mixing starting materials to prepare a raw material mixture; and heating the raw material mixture in a nitrogen-containing atmospheric gas, wherein the starting materials includes a host raw material including a silicon raw material including metallic silicon, and at least one aluminum raw material selected from the group consisting of metallic aluminum and aluminum compound, and at least activator raw material selected from the rare earth elements for activating the host raw material.
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Citations
70 Claims
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1-8. -8. (canceled)
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9. A method for preparing a β
- -SiAlON phosphor, the method comprising;
weighing starting material in order to prepare the β
-SiAlON phosphor represented by Formula;
Si(6-x)AlxOyN(8-y);
Lnz (wherein, Ln is a rare earth element, and the following requirements are satisfied;
0<
x≦
4.2, 0<
y≦
4.2, and 0<
z≦
1.0),mixing the starting materials to prepare a raw material mixture; and firing the raw material mixture in a nitrogen-containing atmospheric gas, wherein the starting materials comprises; a silicon raw material including metallic silicon, an aluminum raw material including at least one of metallic aluminum and aluminum compound, and at least one activator raw material selected from the rare earth elements for activating the host raw material. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 28, 29, 30, 31, 32, 33, 34, 35)
- -SiAlON phosphor, the method comprising;
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19. A method of preparing a β
- -SiAlON phosphor, the method comprising;
weighing a silicon raw material, an aluminum raw material and an activator raw material in order to prepare a β
-SiAlON phosphor represented by the following formula;
Si(6-x)AlxOyN(8-y);
Lnz (wherein, Ln is a rare earth element, and the following requirements are satisfied;
0<
x≦
4.2, 0<
y≦
4.2, and 0<
z≦
1.0),preparing a raw material mixture by mixing the weighed silicon raw material, the aluminum raw material and the activator raw material; and firing the raw material mixture in a nitrogen-containing atmospheric gas, wherein the preparing of the aluminum raw material includes controlling a mixing ratio of metallic aluminum and an aluminum compound in order to control particle characteristics of the β
-SiAlON phosphor. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
- -SiAlON phosphor, the method comprising;
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36. A white LED device comprising:
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a blue LED chip; and a silicon resin provided on the blue LED chip, and including a green phosphor as a β
-SiAlON phosphor represented by the following formula;
Si(6−
x)AlxOyN(8−
y);
Lnz (wherein, Ln is a rare earth element, and the following requirements are satisfied;
0<
x≦
4.2, 0<
y≦
4.2, and 0<
z≦
1.0), and a red phosphor as a nitride-based phosphor represented by CaAlSiN3;
Eu, the green phosphor having an excitation wavelength band at a portion of band in ultraviolet rays and visual rays and an emission peak within the range of 500 to 570 nm. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A white LED device comprising:
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a blue LED chip; and a green phosphor and a red phosphor disposed in the periphery of the blue LED chip, wherein the green phosphor is at least one selected from the group consisting of an M2SiO4;
Eu,Re silicate-based phosphor, an MA2D4;
Eu,Re sulfide-based phosphor, a β
-SiAlON;
Eu,Re phosphor and an M′
A′
2O4;
Ce,Re′
oxide-based phosphor, and the red phosphor is at least one selected from an M′
AlSiNx;
Eu,Re(1≦
x≦
5) nitride-based phosphor and an M′
D;
Eu,Re sulfide-based phosphor,M being at least two elements selected from Ba, Sr, Ca and Mg, A being at least one selected from Ga, Al and In, D being at least one selected from S, Se and Te, M′
at least one selected from Ba, Sr, Ca and Mg, A′
at least one selected from Sc, Y, Gd, La, Lu, Al and In, Re at least one selected from Y, La, Ce, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, F, Cl, Br and I, and Re′
at least one selected from Nd, Pm, Sm, Tb, Dy, Ho, Er, Tm, Yb, F, Cl, Br and I, andRe and Re′
being respectively within the range of 1 ppm to 50000 ppm. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60)
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61. A white LED module, comprising:
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a circuit board and at least one white LED device mounted on the circuit board, where the white LED device includes; a blue LED chip; and a green phosphor and a red phosphor disposed in the periphery of the blue LED chip, wherein the green phosphor is at least one selected from the group consisting of an M2SiO4;
Eu,Re silicate-based phosphor, an MA2D4;
Eu,Re sulfide-based phosphor, a β
-SiAlON;
Eu,Re phosphor and an M′
A′
2O4;
Ce,Re′
oxide-based phosphor, and the red phosphor is at least one selected from an M′
AlSiNx;
Eu,Re(1≦
x≦
5) nitride-based phosphor and an M′
D;
Eu,Re sulfide-based phosphor,M being at least two elements selected from Ba, Sr, Ca and Mg, A being at least one selected from Ga, Al and In, D being at least one selected from S, Se and Te, M′
at least one selected from Ba, Sr, Ca and Mg, A′
at least one selected from Sc, Y, Gd, La, Lu, Al and In, Re at least one selected from Y, La, Ce, Nd, Pm, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, F, Cl, Br and I, and Re′
at least one selected from Nd, Pm, Sm, Tb, Dy, Ho, Er, Tm, Yb, F, Cl, Br and I, andRe and Re′
being respectively in the range of 1 ppm to 50000 ppm. - View Dependent Claims (62, 63, 64, 65, 66, 67, 68, 69, 70)
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Specification