Abstract: To provide a photocatalyst decomposition apparatus that can supply a liquid phase containing a substance to be decomposed by a photocatalyst and that can perform decomposition of the substance more efficiently than in the related art. A photocatalyst decomposition system according to the invention includes: a gas phase generation apparatus configured to convert a liquid phase containing a decomposition object into a gas phase; and a photocatalyst member configured to come into contact with the gas phase to decompose the decomposition object by light from a light source. The photocatalyst member includes a base material formed of a porous material and a photocatalyst layer provided on a surface of the base material.

Abstract: A hydrogen production apparatus including a photocatalyst and generating hydrogen from water includes a wavelength separation unit separating sunlight by wavelength, an infrared light conversion unit converting infrared light separated by the wavelength separation unit to visible light, and an ultraviolet light conversion unit converting ultraviolet light separated by the wavelength separation unit to visible light.

Abstract: Provided is a magneto-resistance effect element formed by sequentially laminating a ferromagnetic fixing layer, a ferromagnetic free layer, and a protective layer, which is capable of efficiently detecting the magnetic field above the magneto-resistance effect element without deteriorating the function as the magnetic sensor. The GMR laminated film for the magneto-resistance effect element includes the ferromagnetic free layer, and the protective layer formed on the ferromagnetic free layer to be protected from oxidation. The protective layer is formed as an oxide antiferromagnetic substance, and has its film thickness of 10 nm or smaller.

Abstract: Provided are a p-type thermoelectric conversion material, a thermoelectric conversion module, and a method of manufacturing a p-type thermoelectric conversion material that are capable of obtaining high thermoelectric conversion characteristics. The p-type thermoelectric conversion material has a full Heusler alloy having a composition represented by the following General Formula (1) and has a relative density of 85% or more, FexTiyMAaMBb . . . (1), wherein in Formula (1), MA is one element selected from the group consisting of Si, Sn, and Ge, MB is one element selected from the group consisting of Al, Ga, and In, and x, y, a, and b are numbers set so that x+y+a+b=100, a+b=z, 50<x?52.5, 20?y?24.5, 24.5?z?29, a>0, and b>0 in atom %, respectively.

Abstract: There is provided a thermoelectric conversion material formed of an Fe2TiSi-based full-Heusler alloy to which La is added, wherein La is solid-dissolved in the Fe2TiSi-based full-Heusler alloy.

Abstract: In order to provide an Fe2TiSi type full-Heusler thermoelectric conversion material having a high dimensionless figure-of-merit ZT, the full-Heusler thermoelectric conversion material is characterized in that: the full-Heusler thermoelectric conversion material has secondary crystal grains having an Fe2TiSi type composition and a coating layer covering the circumference of the secondary crystal grains and containing an element other than Fe, Ti, and Si as a main component; and the coating layer has a composition containing an element being dissolvable in a crystal structure of the Fe2TiSi type composition and having an electric resistivity lower than the secondary crystal grains.

Abstract: There is provided a thermoelectric conversion material formed of an Fe2TiSi-based full-Heusler alloy to which La is added, wherein La is solid-dissolved in the Fe2TiSi-based full-Heusler alloy.

Abstract: According to one embodiment, a thermoelectric conversion material includes a main phase and a grain boundary phase, the main phase is a Fe2TiSi-based full Heusler alloy, the grain boundary phase includes a metal N slightly solid-soluble in Fe2TiSi, and a volume ratio of the grain boundary phase is 2% to 10%.

Abstract: Provided is a thermoelectric conversion material formed from a full Heusler alloy represented by the composition formula: Fe2+?(Ti1??M1?)1??+?(Al1??M2?)1??. M1 represents at least one element selected from the group consisting of V, Nb and Ta, and M2 represents at least one element selected from the group consisting of Group 13 elements except for Al and Group 14 elements. ? satisfies the relation: 0<??0.42, ? satisfies the relation: 0??<0.75, and ? satisfies the relation: 0??<0.5. The valence electron concentration, VEC, satisfies the relation: 5.91?VEC<6.16.

Abstract: Provided are a p-type thermoelectric conversion material, a thermoelectric conversion module, and a method of manufacturing a p-type thermoelectric conversion material that are capable of obtaining high thermoelectric conversion characteristics. The p-type thermoelectric conversion material has a full Heusler alloy having a composition represented by the following General Formula (1) and has a relative density of 85% or more, FexTiyMAaMBb . . . (1), wherein in Formula (1), MA is one element selected from the group consisting of Si, Sn, and Ge, MB is one element selected from the group consisting of Al, Ga, and In, and x, y, a, and b are numbers set so that x+y+a+b=100, a+b=z, 50<x?52.5, 20?y?24.5, 24.5?z?29, a>0, and b>0 in atom %, respectively.

Abstract: The present invention provides a metal-based thermoelectric conversion material having a high figure-of-merit ZT, the thermoelectric conversion material being a p-type or n-type full-Heusler alloy, having a composition of an Fe2TiA type (wherein A is Si and/or Sn), and including crystal grains having an average grain diameter of 30-500 nm. In particular, in the case where the composition of an Fe2TiA type is represented by the empirical formula Fe2+?Ti1+yA1+z, the values of ?, y, and z in an Fe—Ti-A ternary alloy phase diagram lie within the range ? surrounded by the points (50, 37, 13), (45, 30, 25), (39.5, 25, 35.5), (50, 14, 36), (54, 21, 25), and (55.5, 25, 19.5) in terms of (Fe, Ti, A) in at %.

Abstract: In order to provide an Fe2TiSi type full-Heusler thermoelectric conversion material having a high dimensionless figure-of-merit ZT, the full-Heusler thermoelectric conversion material is characterized in that: the full-Heusler thermoelectric conversion material has secondary crystal grains having an Fe2TiSi type composition and a coating layer covering the circumference of the secondary crystal grains and containing an element other than Fe, Ti, and Si as a main component; and the coating layer has a composition containing an element being dissolvable in a crystal structure of the Fe2TiSi type composition and having an electric resistivity lower than the secondary crystal grains.

Abstract: There is provided a thermoelectric conversion material made of a full-Heusler alloy and capable of enhancing figure of merit. In order to solve the above problem, the thermoelectric conversion material is made of the full-Heusler alloy represented by the following composition formula: (Fe1-xM1x)2+?(Ti1-yM2y)1+?(A1-zM3z)1+?. A composition in a ternary phase diagram of Fe—Ti-A is inside a hexagon having points (50, 37, 13), (45, 30, 25), (39.5, 25, 35.5), (50, 14, 36), (54, 21, 25), and (55.5, 25, 19.5) as apexes. Further, an amount of change ?VEC of an average valence electron number per atom VEC in the case of x=y=z=0 satisfies a relation 0<|?VEC|?0.2 or 0.2<|?VEC|?0.3.

Abstract: The present invention provides a metal-based thermoelectric conversion material having a high figure-of-merit ZT, the thermoelectric conversion material being a p-type or n-type full-Heusler alloy, having a composition of an Fe2TiA type (wherein A is Si and/or Sn), and including crystal grains having an average grain diameter of 30-500 nm. In particular, in the case where the composition of an Fe2TiA type is represented by the empirical formula Fe2+?Ti1+yA1+z, the values of ?, y, and z in an Fe—Ti-A ternary alloy phase diagram lie within the range ? surrounded by the points (50, 37, 13), (45, 30, 25), (39.5, 25, 35.5), (50, 14, 36), (54, 21, 25), and (55.5, 25, 19.5) in terms of (Fe, Ti, A) in at %.

Abstract: Provided is a thermoelectric conversion material formed from a full Heusler alloy represented by the composition formula: Fe2+?(Ti1??M1?)1??+?(Al1??M2?)1??. M1 represents at least one element selected from the group consisting of V, Nb and Ta, and M2 represents at least one element selected from the group consisting of Group 13 elements except for Al and Group 14 elements, ? satisfies the relation: 0<??0.42, ? satisfies the relation: 0??<0.75, and ? satisfies the relation: 0??< 0.5. The valence electron concentration, VEC, satisfies the relation: 5.91?VEC<6.16.

Abstract: To provide a stress relaxation structure that can achieve both high thermal conductivity and high thermal stress relaxation ability and has excellent vibration durability, and a thermoelectric conversion module having such a stress relaxation structure. The stress relaxation structure includes a rolled-up body having a first thermal conductor and a second thermal conductor that are alternately rolled up. The first thermal conductor is metal foil, and the second thermal conductor is porous metal foil.

Abstract: The present invention provides a thermoelectric conversion material that is a material comprising elements less poisonous than Te and has a Seebeck coefficient comparable to BiTe. The present invention is a full-Heusler alloy that is represented by the composition formula Fe2+?Ti1+ySi1+z and has ?, y, and z allowing the material to fall within the region surrounded by (Fe, Ti, Si)=(50, 37, 13), (50, 14, 36), (45, 30, 25), (39.5, 25, 35.5), (54, 21, 25), and (55.5, 25, 19.5) by at % in an Fe—Ti—Si ternary alloy phase diagram.