Kabushiki Kaisha Toshiba

Toshiba Materials Co., Ltd.

Toshiba Energy Systems & Solutions Corporation

Tomoko Eguchi

Seiichi Suenaga

Tomohiro Suetsuna

Toshihide Takahashi

Koichi Harada

Tomohiro Yamashita

Masaya Hagiwara

Yasushi Hattori

Takashi Kuboki

Yasuyuki Hotta

Keiko Albessard

Takahiro Kawamoto

Maki Yonetsu

Kouichi Harada

Naoyuki Nakagawa

Hiroaki Kinouchi

Akiko Saito

Yoshihiko Nakano

Mutsuki Yamazaki

Toshiro Hiraoka

Fumihiko Aiga

Shinji Murai

Wu Mei

Akihiro Tsujimura

Taishi Fukazawa

Takashi Amano

Noritsugu Shiokawa

Naoto Ito

Hirotaka Ishii

A connection structure for a superconducting layer according to an embodiment includes a first superconducting layer; a second superconducting layer; and a connection layer disposed between the first superconducting layer and the second superconducting layer, the connection layer including crystal grains containing a rare earth element (RE), barium (Ba), copper (Cu), and oxygen (O), the crystal grains having a grain size distribution including a bimodal distribution. The bimodal distribution includes a first distribution including a first peak and a second distribution including a second peak. A first grain size corresponding to the first peak is larger than a second grain size corresponding to the second peak. Among the crystal grains, crystal grains having a grain size corresponding to the first distribution include a crystal grain having a plate shape or a flat shape.

Connection structure for superconducting layer, superconducting wire, superconducting coil, superconducting device, and connection method for superconducting layer

A superconducting wire according to an embodiment includes: a substrate; a first region provided on the substrate and containing a first rare earth element, Ba, Cu, and O; a second region provided on the substrate and containing a second rare earth element, Ba, Cu, and O; and a third region provided on the substrate, provided between the first region and the second region, and containing a third rare earth element, Pr, Ba, Cu, and O. A surface density of particles having an aspect ratio of 3 or more present on a surface of the third region is larger than a surface density of particles having an aspect ratio of 3 or more present on surfaces of the first region and the second region.

Superconducting wire material, superconducting coil, superconducting magnet, superconducting motor, superconducting generator, superconducting aircraft, and superconducting device

A connection structure of conductive layers according to an embodiment includes: a first conductive member including a first conductive layer and a first substrate, the first conductive member extending in a first direction, the first conductive member curved in the first direction such that the first conductive layer side is convex; a second conductive member including a second conductive layer and a second substrate, the second conductive member extending in the first direction, the second conductive member curved in the first direction such that the second conductive layer side is convex; a third conductive member including a third conductive layer and a third substrate, the third conductive member extending in the first direction; a first connection layer between a the first conductive layer and the third conductive layer, the first connection layer having varying thickness; and a second connection layer between the second conductive layer and the third conductive layer, the second connection layer having varying thickness.

Connection structure of conductive layers, conductive wire, coil and apparatus

A method may produce a heat regenerating material particle, including: preparing a slurry by adding a powder of the heat regenerating substance to an alginic acid aqueous solution and mixing the powder of the heat regenerating substance and the aqueous alginic acid solution; and forming a particle by gelling the slurry by dropping the slurry into a gelling solution. The gelling solution may include a metal element including calcium (Ca), manganese (Mn), magnesium (Mg) beryllium (Be), strontium (Sr), aluminum (Al), iron (Fe), copper (Cu), nickel (Ni), and cobalt (Co). The forming may involve controlling the gelation time so that a concentration of the metal element in a first region of the particle becomes lower than a concentration of the metal element in a second region. The second region may be closer to an outer edge of the particle compared to the first region.

Method for producing a heat regenerating material particle

A method may produce a two-stage heat regenerating cryogenic refrigerator including a vacuum vessel, first and second cylinder disposed in the vessel, the second cylinder coaxially connected to the first cylinder, and first and second regenerator respectively disposed in the first and second cylinder. The method may include: accommodating a first heat regenerating material (HRM) in the first regenerator; and filling a plurality of HRM particles in the second regenerator. The HRM particles may be a second HRM, each of the HRM particles including an oxide or oxysulfide heat regenerating substance having a maximum value of specific heat at a temperature of ≤20 K of 0.3+ J/cm·K and Ca, Mn, Mg, Be, Sr, Al, Fe, Cu, Ni, and/or Co. Each of the HRM particles may include a first and second region, the second region being closer to an HRM particle outer edge than the first region.

Method for producing a two-stage heat regenerating cryogenic refrigerator

A connection structure for a superconducting layer according to an embodiment includes a first superconducting layer, a second superconducting layer, and a connection layer between the first superconducting layer and the second superconducting layer, the connection layer including crystal particles containing a rare earth element, barium, copper, and oxygen, the crystal particles having a major diameter distribution including a trimodal distribution. The trimodal distribution has first, second, and third distributions in which major diameter become small in this order. The aspect ratios of the crystal particles included in the first distribution and the second distribution include a bimodal distribution. The median value of the major diameters of the crystal particles included in the distribution on a higher aspect ratio side in the bimodal distribution is greater than the median value of the major diameters of the crystal particles included in the distribution on a lower aspect ratio side.

Connection structure for superconducting layer, superconducting wire, superconducting coil, and superconducting device

A connection structure of a superconducting layer according to an embodiment includes a first superconducting layer, a second superconducting layer, and a connection layer provided between the first superconducting layer and the second superconducting layer and including a first substance containing a rare earth element, barium, copper, and oxygen and a second substance containing a metal element, in which a first region per unit area at a first interface between the first superconducting layer and the connection layer is 1% or more and 50% or less where the second substance and the first superconducting layer are in contact with each other, and a second region per unit area at a second interface between the second superconducting layer and the connection layer is 1% or more and 50% or less where the second substance and the second superconducting layer are in contact with each other.

Connection structure of superconducting layer, superconducting wire, superconducting coil, superconducting devce, and connection method of superconducting layer

A connection structure of a superconducting layer of an embodiment incudes a first superconducting member including a first superconducting layer, and extends in a first direction, a second superconducting member including a second superconducting layer facing the first superconducting layer, and extends in the first direction, the second superconducting member having a first region, a second region, and a third region which is separated in the second direction from the second region, and a connection layer that contains a rare earth element (RE), barium (Ba), copper (Cu), and oxygen (O), and connects the first superconducting layer and the second superconducting layer. The first superconducting layer is present in a third direction between the second region and the third region, the third direction being perpendicular to the first direction and perpendicular to the second direction.

Connection structure of superconducting layer, superconducting wire, superconducting coil, and superconducting device

A two-stage heat regenerating cryogenic refrigerator may include: a vacuum vessel; a first and second cylinder in the vessel; the second cylinder coaxially connected to the first cylinder; a 1regenerator in the first cylinder and accommodating heat regenerating material (HRM) 1; and a second regenerator in the 2cylinder accommodating HRM 2, HRM 2 including HRM particles, each HRM particle including a metal element and a heat regenerating substance including an oxide or oxysulfide and having a maximum specific heat at &#x2264;20 K of &#x2265;0.3 J/cm&#xb7;K; each HRM particle including a 1and 2region, the 2region being closer to each HRM particle's outer edge than the 1, and the 2region having a higher metal element concentration than the 1, the 1and 2region containing the heat regenerating substance.

Two-stage heat regenerating cryogenic refrigerator

A heat regenerating material particle of an embodiment contains a heat regenerating substance having a maximum value of specific heat at a temperature of 20 K or less is 0.3 J/cm&#xb7;K or more, and one metal element selected from the group consisting of calcium (Ca), magnesium (Mg), beryllium (Be), strontium (Sr), aluminum (Al), iron (Fe), copper (Cu), nickel (Ni), and cobalt (Co). The heat regenerating material particle includes a first region and a second region, the second region is closer to an outer edge of the heat regenerating material particle than the first region, and the second region has a higher concentration of the metal element than the first region.

Heat regenerating material particle, regenerator, refrigerator, superconducting magnet, nuclear magnetic resonance imaging device, nuclear magnetic resonance device, cryopump, and single-crystal pulling device of magnetic-field application type

A heat regenerating material particle according to an embodiment includes a plurality of heat regenerating substance particles having a maximum volume specific heat value of 0.3 J/cm&#xb7;K or more at a temperature of 20 K or lower, and a binder bonding the heat regenerating substance particles, the binder containing water insoluble resin. The heat regenerating material particle has a particle diameter of 500 &#x3bc;m or less.

Heat regenerating material, regenerator, refrigerator, superconducting magnet, nuclear magnetic resonance imaging apparatus, nuclear magnetic resonance apparatus, cryopump, and magnetic field application type single crystal pulling apparatus

The flaky magnetic metal particles of the embodiments include a plurality of flaky magnetic metal particles, each of the flaky magnetic metal particles including a first magnetic particle including a flat surface, at least one first element selected from the group consisting of Fe, Co and Ni, an average ratio between the maximum length and the minimum length in the flat surface being between 1 and 5 inclusive, an average thickness of the first magnetic particles being between 10 nm and 100 &#x3bc;m inclusive, an average aspect ratio of the first magnetic particles being between 5 and 10000 inclusive; and a plurality of second magnetic particles disposed on the flat surface, an average number of the second magnetic particles being five or more, an average diameter of the second magnetic particles being between 10 nm and 1 &#x3bc;m inclusive.

Flaky magnetic metal particles, pressed powder material, rotating electric machine, motor, and generator

Provided is a method for producing a magnetic material. The method includes preparing magnetic metal particles containing at least one magnetic metal selected from a first group consisting of Fe, Co and Ni, and at least one non-magnetic metal selected from a second group consisting of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, Ba, Sr, Cr, Mo, Ag, Ga, Sc, V, Y, Nb, Pb, Cu, In, Sn and rare earth elements, pulverizing and reaggregating the magnetic metal particles, and thereby forming composite particles containing a magnetic metal phase and an interstitial phase, and heat-treating the composite particles at a temperature of from 50&#xb0; C. to 800&#xb0; C. The particle size distribution of the magnetic metal particles in the preparing magnetic metal particles has two or more peaks.

Method for producing magnetic material

According to an embodiment, a cryogenic regenerator material contains a silver oxide. A molar ratio of silver atoms to oxygen atoms contained in the cryogenic regenerator material: Ag/O is 1.0 or more and 4.0 or less. The cryogenic regenerator material contains at least one selected from AgO, AgO and AgO as the silver oxide.

Cryogenic regenerator material, regenerative cryocooler, and system including regenerative cryocooler

The soft magnetic material of embodiments includes flattened magnetic metal particles including at least one magnetic metal selected from iron (Fe), cobalt (Co) and nickel (Ni), each of the flattened magnetic metal particles having a thickness of from 10 nm to 100 &#x3bc;m, an aspect ratio of from 5 to 10,000, and a lattice strain of from 0.01% to 10%, and being oriented with magnetic anisotropy in one direction within aligned flattened surface; and an interposed phase existing between the flattened magnetic metal particles and including at least one of oxygen (O), carbon (C), nitrogen (N) and fluorine (F).

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Yokohama, Japan

Tomoko Eguchi