Abstract: A fluid sterilization apparatus according to an embodiment includes a tubular cover; a tubular portion provided inside the cover; a supply head provided at one end of the tubular portion; a discharge head provided at the other end of the tubular portion; at least one light-emitting element provided in at least one of the supply head and the discharge head and allowed to irradiate an inside of the tubular portion with ultraviolet rays; and a temperature control unit capable of controlling a temperature of a space between the cover and the tubular portion.

Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12??(I) wherein a and b satisfy 0?a?0.3 and 0?b?0.022.

Abstract: Provided are a ceramic complex having high light emission intensity and a method for producing the same. Proposed is a ceramic complex, including a rare earth aluminate fluorescent material having a composition represented by the following formula (I) and an aluminum oxide, wherein the content of the aluminum oxide is 70% by mass or more, the content of Na is 7 ppm by mass or less, the content of Si is 5 ppm by mass or less, the content of Fe is 3 ppm by mass or less, and the content of Ga is 5 pm by mass or less, relative to the total amount of the rare earth aluminate fluorescent material having a composition represented by the following formula (I) and the aluminum oxide. (Ln1-aCea)3Al5O12 ??(I) wherein Ln represents at least one element selected from the group consisting of Y, Gd, Lu, and Tb; and a satisfies 0<a?0.022.

Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12??(I) wherein a and b satisfy 0?a?0.3 and 0<b?0.022.

Abstract: A method of producing hybrid fluorescent material includes dispersing Lu3Al5O12:Ce fluorescent material particles in a first solution; mixing the first solution in a second solution, the second solution including a mixture of a first metallic salt containing at least one element selected from the group consisting of yttrium, gadolinium, and terbium, a second metallic salt containing aluminum and/or gallium, and a third metallic salt containing cerium, wherein the mixing attaches (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material precursor particles on surfaces of the Lu3Al5O12:Ce fluorescent material particles to obtain a hybrid fluorescent material precursor; separating the hybrid fluorescent material precursor particles from the first and second solutions; and calcining the hybrid fluorescent material precursor particles to obtain a hybrid fluorescent material of Lu3Al5O12:Ce fluorescent material particles covered by (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material.

Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12??(I) wherein a and b satisfy 0?a?0.3 and 0<b?0.022.

Abstract: Provided are a ceramic complex having high light emission intensity and a method for producing the same. Proposed is a ceramic complex, including a rare earth aluminate fluorescent material having a composition represented by the following formula (I) and an aluminum oxide, wherein the content of the aluminum oxide is 70% by mass or more, the content of Na is 7 ppm by mass or less, the content of Si is 5 ppm by mass or less, the content of Fe is 3 ppm by mass or less, and the content of Ga is 5 pm by mass or less, relative to the total amount of the rare earth aluminate fluorescent material having a composition represented by the following formula (I) and the aluminum oxide. (Lni-aCea)3Al5O12 ??(I) wherein Ln represents at least one element selected from the group consisting of Y, Gd, Lu, and Tb; and a satisfies 0<a?0.022.

Abstract: A method of producing hybrid fluorescent material includes dispersing Lu3Al5O12:Ce fluorescent material particles in a first solution; mixing the first solution in a second solution, the second solution including a mixture of a first metallic salt containing at least one element selected from the group consisting of yttrium, gadolinium, and terbium, a second metallic salt containing aluminum and/or gallium, and a third metallic salt containing cerium, wherein the mixing attaches (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material precursor particles on surfaces of the Lu3Al5O12:Ce fluorescent material particles to obtain a hybrid fluorescent material precursor; separating the hybrid fluorescent material precursor particles from the first and second solutions; and calcining the hybrid fluorescent material precursor particles to obtain a hybrid fluorescent material of Lu3Al5O12:Ce fluorescent material particles covered by (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material.

Abstract: A method of producing hybrid fluorescent material includes dispersing Lu3Al5O12:Ce fluorescent material particles in a first solution; mixing the first solution in a second solution, the second solution including a mixture of a first metallic salt containing at least one element selected from the group consisting of yttrium, gadolinium, and terbium, a second metallic salt containing aluminum and/or gallium, and a third metallic salt containing cerium, wherein the mixing attaches (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material precursor particles on surfaces of the Lu3Al5O12:Ce fluorescent material particles to obtain a hybrid fluorescent material precursor; separating the hybrid fluorescent material precursor particles from the first and second solutions; and calcining the hybrid fluorescent material precursor particles to obtain a hybrid fluorescent material of Lu3Al5O12:Ce fluorescent material particles covered by (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material.

Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12??(I) wherein a and b satisfy 0?a?0.3 and 0<b?0.022.

Abstract: A method of producing hybrid fluorescent material includes dispersing Lu3Al5O12:Ce fluorescent material particles in a first solution; mixing the first solution in a second solution, the second solution including a mixture of a first metallic salt containing at least one element selected from the group consisting of yttrium, gadolinium, and terbium, a second metallic salt containing aluminum and/or gallium, and a third metallic salt containing cerium, wherein the mixing attaches (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material precursor particles on surfaces of the Lu3Al5O12:Ce fluorescent material particles to obtain a hybrid fluorescent material precursor; separating the hybrid fluorescent material precursor particles from the first and second solutions; and calcining the hybrid fluorescent material precursor particles to obtain a hybrid fluorescent material of Lu3Al5O12:Ce fluorescent material particles covered by (Y,Gd,Tb)3(Al,Ga)5O12:Ce fluorescent material.