Abstract: A pressing operation body includes an inversion spring having a dome shape; and a rubber stem configured to bend in response to pressing and press the inversion spring. The inversion spring includes a dome portion, and a plurality of leg portions that are extended outward from an outer peripheral edge of the dome portion. The rubber stem includes a base portion configured to support a lower edge of the rubber stem. The base portion includes a plurality of retaining portions configured to retain the plurality of leg portions of the inversion spring.

Abstract: Magnetic cold storage material particles with a low breakage rate in the case of being subjected to long-term vibration caused by operation of a refrigerator under a cryogenic temperature are provided. A cold storage device and a refrigerator, each of which includes the above-described magnetic cold storage material particles and does not degrade refrigeration performance under long-term operation, are provided. Apparatuses provided with this refrigerator, such as a superconducting magnet, are provided. Each magnetic cold storage material particle of the embodiment is composed of an intermetallic compound containing a rare earth element, and an area percentage of voids present in its cross-section is 0.0001% or more and 15% or less. Each of the cold storage device of the embodiment, the refrigerator of the embodiment, and the apparatuses provided with this refrigerator, such as a superconducting magnet, includes the magnetic cold storage material particles of the embodiment.

Abstract: A cold storage material of an embodiment includes a rare earth oxysulfide containing at least one rare earth element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu, and a first group element of 0.001 atom % or more and 10 atom % or less, in which a maximum value of volume specific heat in a temperature range of 2 K or more and 10 K or less is 0.5 J/(cm3·K) or more.

Abstract: A cold storage material particle of an embodiment includes at least one first element selected from the group consisting of a rare earth element, silver (Ag), and copper (Cu) and a second element that is different from the first element and forms a multivalent metal ion in an aqueous solution, in which an atomic concentration of the second element is 0.001 atomic % or more and 60 atomic % or less, and a maximum value of volume specific heat at a temperature of 20K or less is 0.3 J/cm3·K or more.

Abstract: A ceramic scintillator according to the present embodiment has a composition represented by (Lu1-xPrx) a (Al1-yGay) bO12, wherein x, y, a, and b in the composition respectively satisfy 0.005?x?0.025, 0.3?y?0.7, 2.8?a?3.1, and 4.8?b?5.2.

Abstract: A cold storage material, which has a large specific heat and a small magnetization in an extremely low temperature region and has satisfactory manufacturability, is provided, and a method for manufacturing the same is provided. Further, a refrigerator having high efficiency and excellent cooling performance is provided by filling this refrigerator with the above-described cold storage material. Moreover, a device incorporating a superconducting coil capable of reducing influence of magnetic noise derived from a cold storage material is provided. The cold storage material of embodiments is a granular body composed of an intermetallic compound in which the ThCr2Si2-type structure 11 occupies 80% by volume or more, and has a crystallite size of 70 nm or less.

Abstract: A cold storage material, which has a large specific heat and a small magnetization in an extremely low temperature region and has satisfactory manufacturability, is provided, and a method for manufacturing the same is provided. Further, a refrigerator having high efficiency and excellent cooling performance is provided by filling this refrigerator with the above-described cold storage material. Moreover, a device incorporating a superconducting coil capable of reducing influence of magnetic noise derived from a cold storage material is provided. The cold storage material of embodiments is a granular body composed of an intermetallic compound in which the ThCr2Si2-type structure 11 occupies 80% by volume or more, and has a crystallite size of 70 nm or less.

Abstract: A cold storage material, which has a large specific heat and a small magnetization in an extremely low temperature region and has satisfactory manufacturability, is provided, and a method for manufacturing the same is provided. Further, a refrigerator having high efficiency and excellent cooling performance is provided by filling this refrigerator with the above-described cold storage material. Moreover, a device incorporating a superconducting coil capable of reducing influence of magnetic noise derived from a cold storage material is provided. The cold storage material of embodiments is a granular body composed of an intermetallic compound in which the ThCr2Si2-type structure 11 occupies 80% by volume or more, and has a crystallite size of 70 nm or less.

Abstract: A phosphor of an embodiment has a composition represented by a composition formula: NaxRMySzOa, where R represents at least one element selected from the group consisting of Y, La, Gd, and Lu, M represents at least one element selected from the group consisting of Bi, Ce, Eu, and Pr, x is an atomic ratio satisfying 0.93<x<1.07, y is an atomic ratio satisfying 0.00002<y<0.01, z is an atomic ratio satisfying 1.9<z<2.1, and a is an atomic ratio satisfying 0.001<a<0.05.

Abstract: A phosphor of an embodiment has a composition represented by a composition formula: NaxRMySzOa, where R represents at least one element selected from the group consisting of Y, La, Gd, and Lu, M represents at least one element selected from the group consisting of Bi, Ce, Eu, and Pr, x is an atomic ratio satisfying 0.93<x<1.07, y is an atomic ratio satisfying 0.00002<y<0.01, z is an atomic ratio satisfying 1.9<z<2.1, and a is an atomic ratio satisfying 0.001<a<0.05.

Abstract: The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by a formula: (Sr1-x, Eux)?Si?Al?O?N? (1) (wherein x is 0<x<1, ? is 0<??4 and ?, ?, ? and ? are numbers such that converted numerical values when ? is 3 satisfy 9<??15, 1???5, 0.5???3 and 10???30), wherein the phosphor is composed of particles having a sphericity of 0.65 or more and emits green light by being excited by ultraviolet light, violet light or blue light.

Abstract: The present invention provides a phosphor comprising a cerium-activated sialon crystal having a basic composition represented by formula (1): (Sr1-x,Cex)?Si?Al?O?N???formula: (1) (wherein, x is 0<x<1, ? is 0<??3, and ?, ?, ? and ? are numbers such that numerical values converted when ? is 2 satisfy 5???9, 1???5, 0???1.5, and 10???20), wherein the phosphor includes particles having a sphericity of 0.65 or more and emits yellow light by being excited by ultraviolet light, violet light or blue light.

Abstract: The present invention provides a phosphor comprising a cerium-activated sialon crystal having a basic composition represented by formula (1): (Sr1-xCex)?Si?Al?O?N???formula: (1) (wherein, x is 0<x<1, ? is 0<??3, and ?, ?, ? and ? are numbers such that numerical values converted when ? is 2 satisfy 5???9, 1???5, 0???1.5, and 10???20), wherein the phosphor includes particles having a sphericity of 0.65 or more and emits yellow light by being excited by ultraviolet light, violet light or blue light.

Abstract: The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by a formula: (Sr1-x, Eux)?Si?Al?O?N? (1) (wherein x is 0<x<1, ? is 0<?<4 and ?, ?, ? and ? are numbers such that converted numerical values when ? is 3 satisfy 9<??15, 1???5, 0.5???3 and 10???30), wherein the phosphor is composed of particles having a sphericity of 0.65 or more and emits green light by being excited by ultraviolet light, violet light or blue light.

Abstract: A light emitting device 1 according to an embodiment includes a planar alumina substrate, a semiconductor light-emitting element mounted on the alumina substrate, and a phosphor layer. The phosphor layer includes a silicone resin layer provided to cover an upper surface and a side surface of the semiconductor light-emitting element and a phosphor emitting visible light by being excited with light emitted from the semiconductor light-emitting element. The phosphor is dispersed in the silicone resin layer. The alumina substrate has a water absorption rate of 5% or more and 60% or less, and an adhesion strength between the alumina substrate and the silicone resin layer is 1 N or more.

Abstract: A semiconductor light emitting element emits ultraviolet light or blue light that impinges upon a light emitting cover portion including a blue phosphor, a green phosphor, a red phosphor and a deep red phosphor to emit white light by mixing the light emission colors from the phosphors. The deep red phosphor has a main emission peak in a longer wavelength region than a main emission peak of the red phosphor. The red phosphor includes at least one component selected from: a europium-activated SiAlON phosphor and a europium-activated CASN phosphor each having a predetermined composition. The deep red phosphor includes a manganese-activated magnesium florogermanate phosphor having a predetermined composition. The white light emitting lamp is excellent in both high luminance and high color rendering properties.

Abstract: The present invention provides a phosphor comprising a europium-activated sialon crystal having a basic composition represented by the following formula (1) [Formula 1] formula: (Sr1-x, Eux)?Si?Al?O?N???(1) (wherein x is 0<x<1, ? is 0<??4 and ?, ?, ? and ? are numbers such that converted numerical values when ? is 3 satisfy 9<??15, 1???5, 0.5???3 and 10???25), and the sialon crystal includes at least one non-Eu rare earth element selected from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu in a proportion of 0.1% by mass or more and 10% by mass or less, and the phosphor emitting green light by being excited by ultraviolet light, violet light or blue light.

Abstract: A light emitting device 1 according to an embodiment includes a planar alumina substrate, a semiconductor light-emitting element mounted on the alumina substrate, and a phosphor layer. The phosphor layer includes a silicone resin layer provided to cover an upper surface and a side surface of the semiconductor light-emitting element and a phosphor emitting visible light by being excited with light emitted from the semiconductor light-emitting element. The phosphor is dispersed in the silicone resin layer. The alumina substrate has a water absorption rate of 5% or more and 60% or less, and an adhesion strength between the alumina substrate and the silicone resin layer is 1 N or more.

Abstract: An object is to provide a white light emitting lamp 1 comprising: a semiconductor light emitting element 2 which is placed on a board 3 and emits ultraviolet light or blue light; and a light emitting portion that is formed so as to cover a light emitting surface of the semiconductor light emitting element 2, the light emitting portion containing a blue phosphor B, a green phosphor G, a red phosphor R and a deep red phosphor DR that are excited by the light emitted from the semiconductor light emitting element 2 to respectively emit blue light, green light, red light and a deep red light, the white light emitting lamp 1 emitting white light by mixing light emission colors from the blue phosphor B, the green phosphor G, the red phosphor R and a deep red phosphor DR with one another, wherein the deep red phosphor DR has a main emission peak in a longer wavelength region than a main emission peak of the red phosphor, the red phosphor R comprises at least one component selected from: a europium-activated SiAlON ph