Abstract: A phosphor plate according to the present invention is a phosphor plate including: a plate-like composite including a base material and a phosphor dispersed in the base material, in which both Ry1 and Ry2 are 5.00 ?m or less, where Ry1 is a maximum height on a front surface of the phosphor plate and Ry2 is a maximum height on a back surface.

Abstract: A phosphor plate including a base material, and a plate-shaped composite including phosphors dispersed in the base material, in which a main component of the base material is alumina, the phosphor includes an ?-type sialon phosphor, and L* value satisfies 73.5 or more and 85.0 or less, a* value satisfies 4.4 or more and 8.0 or less, and b* value satisfies 10.8 or more and 13.0 or less in L*a*b* color coordinates of the phosphor plate in a case of being measured in accordance with JIS Z 8781-4.

Abstract: A phosphor plate includes a plate-like composite including an inorganic base material, which is a sintered material of two or more types of metal oxide including SiO2, and a phosphor contained in the inorganic base material, in which the phosphor includes an ?-type sialon phosphor, and in a case in which intensity of transmitted light at a wavelength of 455 nm and intensity of reflected light at a wavelength of 455 nm of the phosphor plate are denoted by T1 and R1, respectively, T1 and R1 satisfy 1.5×10?2?T1/R1?5.0×10?2.

Abstract: A phosphor plate includes a plate-like composite including a base material and a phosphor contained in the base material, in which the base material contains spinel, the phosphor includes a phosphor containing a Si element, and in an X-ray diffraction pattern of the phosphor plate using a Cu-K? ray, in a case in which peak intensity corresponding to the spinel having a diffraction angle 2? in a range of 36.0° or more and 37.4° or less is set to 1, total intensity of peaks having a diffraction angle 2? in a range of 32.5° or more and 34.5° or less satisfies 0.5 or less.

Abstract: A phosphor plate includes a plate-like composite including a base material and an ?-type sialon phosphor present in the base material, in which, in an X-ray diffraction analysis pattern using a Cu-K? ray, in a case in which peak intensity corresponding to the ?-type sialon phosphor having a diffraction angle 2 ? in a range of 30.2° or more and 30.4° or less is defined as I? and peak intensity of a peak having a diffraction angle 2 ? in a range of 26.6° or more and 26.8° or less is defined as I?, I?, and I? satisfy 0<I?/I??10.

Abstract: A phosphor plate including: a complex containing an ?-sialon phosphor and a sintered body containing spinel represented by a general formula M2xAl4-4xO6-4x (where M represents at least one of Mg, Mn, and Zn, and 0.2<x<0.6). In addition, there is provided a light emitting device including: a group III nitride semiconductor light emitting element; and the phosphor plate provided on one surface of the group III nitride semiconductor light emitting element. Further, there is provided a method for manufacturing the phosphor plate.

Abstract: A phosphor plate including a base material, and a plate-shaped composite including phosphors dispersed in the base material, in which in a case in which an absorption spectrum of light having a wavelength of 300 nm to 700 nm is measured, when an absorbance at 455 nm is defined as A455(%), an absorbance at 700 nm is defined as A700(%), and a thickness of the phosphor plate is defined as T (mm), (A700/A455)/T satisfies 0.01 or more and 1.00 or less.

Abstract: A phosphor powder composed of ?-sialon phosphor particles containing Eu. In a case where an internal quantum efficiency after the phosphor powder is held at 600° C. for 1 hour in an air atmosphere is defined as P1 and an internal quantum efficiency after the phosphor powder is held at 700° C. for 1 hour in an air atmosphere is defined as P2, P1 is equal to or more than 70% and (P1?P2)/P1×100 is equal to or less than 2.8%.

Abstract: A phosphor plate including a base material, and a plate-shaped composite including phosphors dispersed in the base material, in which a main component of the base material is alumina, the phosphor includes an ?-type sialon phosphor, and L* value satisfies 73.5 or more and 85.0 or less, a* value satisfies 4.4 or more and 8.0 or less, and b* value satisfies 10.8 or more and 13.0 or less in L*a*b* color coordinates of the phosphor plate in a case of being measured in accordance with JIS Z 8781-4.

Abstract: A phosphor powder composed of ?-sialon phosphor particles containing Eu. In a case where an internal quantum efficiency after the phosphor powder is held at 600° C. for 1 hour in an air atmosphere is defined as P1 and an internal quantum efficiency after the phosphor powder is held at 700° C. for 1 hour in an air atmosphere is defined as P2, P1 is equal to or more than 70% and (P1?P2)/P1×100 is equal to or less than 2.8%.

Abstract: A phosphor in which an element represented by R? is solid-solutionized in a phosphor host crystal represented by M?(L, A)?X?, wherein M is at least one type of element selected from Mg, Ca, Sr, Ba and Zn, L is at least one type of element selected from Li, Na and K, A is at least one type of element selected from Al, Ga, B, In, Sc, Y, La and Si, X is at least one type of element selected from O, N, F and Cl (where all of X being N is excluded), R is at least one type of element selected from Mn, Cr, Ti, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho and Yb, ?, ?, ? and ? satisfy ?+?+?+?=9, 0.00<??1.30, 3.70???4.30, 3.70???4.30, and 0.00<??1.30.

Abstract: A phosphor in which an element represented by R? is solid-solutionized in a phosphor host crystal represented by M?(L, A)?X?, wherein M is at least one type of element selected from Mg, Ca, Sr, Ba and Zn, L is at least one type of element selected from Li, Na and K, A is at least one type of element selected from Al, Ga, B, In, Sc, Y, La and Si, X is at least one type of element selected from O, N, F and Cl (where all of X being N is excluded), R is at least one type of element selected from Mn, Cr, Ti, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho and Yb, ?, ?, ? and ? satisfy ?+?+?+?=9, 0.00<??1.30, 3.70???4.30, 3.70???4.30, and 0.00<??1.30.