Alloy powder for raw material of inorganic functional material and phosphor
View Patent ↗The present invention relates to a phosphor comprising a nitride or an oxynitride, comprising an X-ray powder diffraction pattern comprising at least one Region having at least one peak with an intensity ratio I of 8% or less, the X-ray powder diffraction pattern measured in the 2θ range from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}), wherein the Region is the 2θ range from 41.5° to 47°, the intensity of each peak is a value obtained after background correction, and the intensity ratio I is defined by the formula (I p ×100)/I max (%), where I max represents the height of the most intense peak present in the 2θ range from 34° to 37° and I p represents the height of each peak.
1. A composition, comprising a
phosphor that is a nitride or an oxynitride represented by the following formula:
M 1′ a′ Sr b′ Ca c′ M 2′ d′ Al e′ Si f′ N g′
wherein:
a′, b′, c′, d′, e′, f′ and g′ satisfy the following:
0.00001 ≦a′≦ 0.15;
0.1≦ b′≦ 0.99999;
0≦ c′< 1;
0≦ d′< 1;
a′+b′+c′+d′= 1;
0.5 ≦e′≦ 1.5;
0.5 ≦f′≦ 1.5; and
0.8×(2/3+ e′+ 4/3× f′ )≦ g′≦ 1.2×(2/3+ e′+ 4/3× f′ );
M 1′ represents an activating element selected from the group consisting of Cr, Mn, Fe, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb;
M 2′ represents Mg and/or Ba;
an oxygen content of the phosphor is 5 wt % or less;
the composition has an X-ray powder diffraction pattern measured in a 2θ range of from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}) including Regions 1 to 6:
Region 1 is a 2θ range of from 10° to 17°;
Region 2 is a 2θ range of from 18.3° to 24°;
Region 3 is a 2θ range of from 25.3° to 30.7°;
Region 4 is a 2θ range of from 32° to 34.3°;
Region 5 is a 2θ range of from 37° to less than 39.083°; and
Region 6 is a 2θ range of from 41.5° to less than 46.973°;
each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 8% or less; and
the intensity ratio I is defined by the formula (I p ×100)/I max (%), where I max represents a height of a most intense peak present in a 2θ range from 34° to 37° and I p represents a height of a measured peak, the intensity ratio being determined after background correction.
2. The composition according to claim 1 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 5% or less.
3. The composition according to claim 1 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 3% or less.
4. The composition according to claim 1 , wherein M 1′ comprises Eu and/or Ce.
5. The composition according to claim 1 , wherein M 1′ comprises Eu.
6. The composition according to claim 1 , wherein b′ is 0.6≦b′≦0.99999.
7. The composition according to claim 1 , wherein d′ is 0.
8. The composition according to claim 1 , wherein the composition is produced from an alloy.
9. The composition according to claim 1 , wherein the composition has a peak emission wavelength of 590 nm to 650 nm.
10. A liquid composition, comprising the composition according to claim 1 in a liquid medium.
11. A light-emitting device, comprising:
an excitation light source; and
a phosphorescent body;
wherein the phosphorescent body comprises the composition according to claim 1 .
12. A display comprising the light-emitting device according to claim 11 .
13. A lighting system comprising the light-emitting device according to claim 11 .
14. A composition comprising a
phosphor that is a nitride or an oxynitride comprising:
Sr and Ca;
Eu and/or Ce; and
optionally Mg and/or Ba;
wherein:
a ratio of a molar amount of Sr to a total molar amount of Sr, Ca, Mg, Ba, Eu, and Ce is from 0.1 to 0.99999;
the composition has an X-ray powder diffraction pattern measured in a 2θ range of from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}) including Regions 1 to 6:
Region 1 is a 2θ range of from 10° to 17°;
Region 2 is a 2θ range of from 18.3° to 24°;
Region 3 is a 2θ range of from 25.3° to 30.7°;
Region 4 is a 2θ range of from 32° to 34.3°;
Region 5 is a 2θ range of from 37° to less than 39.083°; and
Region 6 is a 2θ range of from 41.5° to less than 46.973°;
each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 8% or less; and
the intensity ratio I is defined by the formula (I p ×100), where I max represents a height of a most intense peak present in a 2θ range from 34° to 37° and I p represents a height of a measured peak, the intensity ratio being determined after background correction.
15. The composition according to claim 14 , wherein the phosphor has an orthorhombic crystal system which is identified by an X ray diffraction pattern wherein lattice constants a, b, c and v of the crystal system are:
9.8 Å≦a≦ 9.93 Å
5.6 Å≦b≦ 5.8 Å
5.0 Å≦c≦ 5.2 Å
280 Å≦v≦ 300 Å.
16. The composition according to claim 14 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 5% or less.
17. The composition according to claim 14 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 3% or less.
18. The composition according to claim 14 , wherein the phosphor comprises Eu.
19. The composition according to claim 18 , wherein:
a ratio of a molar amount of Sr to a total molar amount of Sr, Ca, Mg, Ba, Eu, and Ce in the phosphor is from 0.6 to 0.99999; and
the composition has a peak emission wavelength of 590 nm to 650 nm.
20. The composition according to claim 14 , wherein the composition is produced from an alloy.
21. The composition according to claim 14 , wherein the composition has a peak emission wavelength of 590 nm to 650 nm.
22. The composition according to claim 14 , wherein the phosphor comprises oxygen in an amount of 5 wt % or less.
23. The composition according to claim 14 , wherein a ratio of a molar amount of Sr to a total molar amount of Sr, Ca, Mg, Ba, Eu, and Ce in the phosphor is from 0.6 to 0.99999.
24. The composition according to claim 23 , wherein:
the phosphor comprises Eu; and
the composition has a peak emission wavelength of 590 nm to 650 nm.
25. The composition according to claim 14 , wherein the phosphor is free of Mg and Ba.
26. A liquid composition, comprising the composition according to claim 14 in a liquid medium.
27. A light-emitting device, comprising:
an excitation light source; and
a phosphorescent body;
wherein the phosphorescent body comprises the composition according to claim 14 .
28. A display comprising the light-emitting device according to claim 27 .
29. A lighting system comprising the light-emitting device according to claim 27 .
30. A composition, comprising a phosphor that is a nitride or an oxynitride represented by the following formula:
M 1 a M 2 b M 3 c M 4 d N e O f
wherein:
a, b, c, d, e, and f satisfy the following:
0.00001 ≦a′≦ 0.15;
a+b= 1;
0.5≦ c≦ 1.5;
0.5≦ d≦ 1.5;
2.5 ≦e≦ 3.5;and
0≦ f≦ 0.5;
M 1 comprises at least one element selected from the group consisting of Cr, Mn, Fe, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, and Yb;
M 2 comprises Ca and Sr;
M 3 comprises at least one element selected from the group consisting of Al, Ga, In, and Sc;
M 4 comprises at least one element selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf;
a ratio of a molar amount of Sr to a total molar amount of M 1 and M 2 in the phosphor is from 0.1 to 0.99999;
the composition has an X-ray powder diffraction pattern measured in a 2θ range of from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}) including Regions 1 to 6:
Region 1 is a 2θ range of from 10° to 17°;
Region 2 is a 2θ range of from 18.3° to 24°;
Region 3 is a 2θ range of from 25.3° to 30.7°;
Region 4 is a 2θ range of from 32° to 34.3°;
Region 5 is a 2θ range of from 37° to less than 39.083°; and
Region 6 is a 2θ range of from 41.5° to less than 46.973°;
each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 8% or less; and
the intensity ratio I is defined by the formula (I p ×100)/I max (%), where I max represents a height of a most intense peak present in a 2θ range from 34° to 37° and I p represents a height of a measured peak, the intensity ratio being determined after background correction.
31. The composition according to claim 30 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 5% or less.
32. The composition according to claim 30 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 3% or less.
33. The composition according to claim 30 , wherein M 1 comprises Eu and/or Ce.
34. The composition according to claim 30 , wherein M 1 comprises Eu.
35. The composition according to claim 30 , wherein a ratio of a molar amount of Sr to a total molar amount of M 1 and M 2 in the phosphor is from 0.6 to 0.99999.
36. The composition according to claim 30 , wherein the composition is produced from an alloy.
37. The composition according to claim 30 , wherein the composition has a peak emission wavelength of 590 nm to 650 nm.
38. The composition according to claim 35 , wherein:
the phosphor comprises Eu; and
the composition has a peak emission wavelength of 590 nm to 650 nm.
39. A liquid composition, comprising the composition according to claim 30 in a liquid medium.
40. A light-emitting device, comprising:
an excitation light source; and
a phosphorescent body;
wherein the phosphorescent body comprises the composition according to claim 30 .
41. A display comprising the light-emitting device according to claim 40 .
42. A lighting system comprising the light-emitting device according to claim 40 .
43. A composition comprising a phosphor that is a nitride or an oxynitride comprising:
Sr and Ca;
Eu and/or Ce; and
optionally Mg and/or Ba;
wherein:
a ratio of a molar amount of Sr to a total molar amount of Sr, Ca, Mg, Ba, Eu, and Ce is from 0.1 to 0.99999;
the composition has an X-ray powder diffraction pattern measured in a 2θ range of from 10° to 60° using a CuKα line (1.54184 {acute over (Å)}) including Regions 1 to 6:
Region 1 is a 2θ range of from 10° to 17°;
Region 2 is a 2θ range of from 18.3° to 24°;
Region 3 is a 2θ range of from 25.3° to 30.7°;
Region 4 is a 2θ range of from 32° to 34.3°;
Region 5 is a 2θ range of from 37° to 40°; and
Region 6 is a 2θ range of from 41.5° to 47°;
each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 8% or less;
the intensity ratio I is defined by the formula (I p ×100)/I max (%), where I max represents a height of a most intense peak present in a 2θ range from 34° to 37° and I p represents a height of a measured peak, the intensity ratio being determined after background correction; and
the peaks in Regions 1 to 6 originate from a crystal other than the phosphor.
44. The composition according to claim 43 , wherein the phosphor has an orthorhombic crystal system which is identified by an X ray diffraction pattern wherein lattice constants a, b, c and v of the crystal system are:
9.8 Å≦a≦ 9.93 Å
5.6 Å≦b≦ 5.8 Å
5.0 Å≦c≦ 5.2 Å
280 Å≦v≦ 300 Å.
45. The composition according to claim 43 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 5% or less.
46. The composition according to claim 43 , wherein each peak of the X-ray powder diffraction pattern in Regions 1 to 6 has an intensity ratio I of 3% or less.
47. The composition according to claim 43 , wherein the phosphor comprises Eu.
48. The composition according to claim 43 , wherein the composition is produced from an alloy.
49. The composition according to claim 43 , wherein the composition has a peak emission wavelength of 590 nm to 650 nm.
50. The composition according to claim 43 , wherein a ratio of a molar amount of Sr to a total molar amount of Sr, Ca, Mg, Ba, Eu, and Ce is from 0.6 to 0.99999.
51. The composition according to claim 43 , wherein the phosphor comprises oxygen in an amount of 5 wt % or less.
52. The composition according to claim 50 , wherein:
the phosphor comprises Eu; and
the composition has a peak emission wavelength of 590 nm to 650 nm.
53. The composition according to claim 43 , wherein the phosphor is free of Mg and Ba.
54. A liquid composition, comprising the composition according to claim 43 in a liquid medium.
55. A light-emitting device, comprising:
an excitation light source; and
a phosphorescent body;
wherein the phosphorescent body comprises the composition according to claim 43 .
56. A display comprising the light-emitting device according to claim 55 .
57. A lighting system comprising the light-emitting device according to claim 55 .