Nippon Steel Corporation

Kawasaki Jukogyo Kabushiki Kaisha

International Superconductivity Technology Center

Hokuriku Electric Power Company

Railway Technical Research Institute

Mitsubishi Denki Kabushiki Kaisha

Sumitomo Electric Industries, Limited

Kawasaki Steel Corporation

Tosoh Corporation

Shikoku Electric Power Co., Inc.

Akihiro Kondoh

Masato Murakami

Naoki Koshizuka

Hiroshi Takaichi

Hiroyuki Fujimoto

Shoichi Kagiya

Koji Yamaguchi

Shoji Tanaka

Naomichi Sakai

Hiromasa Fukuyama

Satoru Aihara

Tsutomu Takata

Naomichi Nakamura

An electronic apparatus of the present invention comprises an electronic circuit board; an electrically conductive casing for encasing the electronic circuit board; a semiconductor element module electrically connected to the electronic circuit board; and a resin fixture intervening between the electrically conductive casing and the semiconductor element module, the resin fixture mounted with the semiconductor element module and fitted to the electrically conductive casing. As a result, the resin fixture can suppress a transfer of heat generated in the electronic circuit board to the semiconductor element module.

Electronic apparatus

A method for producing an REBaCuO oxide superconductor having large magnetic levitation force, where RE is a rare earth element selected from the group consisting of Y, Sm, Eu, Gd, Dy, Ho, Er, and Yb, involves the steps of using a raw material mixture as the starting feed, heating the raw material mixture for partial melting, followed by cooling and solidification, pulverizing and mixing the resulting solid, shaping the resulting mixture into a given shape, placing or embedding nucleates on or in the resulting shape, followed by heating for partial melting, and cooling the resulting partial melt to a substantial temperature at which a superconducting phase starts to form, followed by slow cooling, whereby the superconducting phase is preferentially formed and grown from a nucleation site.

Production of oxide superconductors having large magnetic levitation

Oxide superconductor and process for producing the same

To ensure a well-oriented crystal structure, there is provided a process of producing an oxide superconductor of a Y--Ba--Cu--O system with a composition having an atomic ratio Y:Ba:Cu of 1.0-2.0:2.0-2.5:3.0-3.5, the process comprising the steps of: preparing a semimelt including solid and liquid phases and consisting of Y, Ba, Cu and O in the atomic ratio; and solidifying the semimelt to form the oxide superconductor by so controlling a moving speed of a solidification front to have two components of different values in two perpendicularly intersecting directions.

Process of producing oxide superconductor

A superconducting bearing unit compring a permanent magnet mounted to a rotating shaft and a superconducting body mounted on the inner periphery of a housing surrounding the shaft, the superconducting member being adapted to be cooled with the rotating shaft moved upwards until it attains a superconducting condition, so that the rotating shaft is supported in use in a balanced condition between the weight of the rotating shaft, etc. and a pinning force caused by the permanent magnet and the superconducting member.

Superconducting bearing unit and operating method thereof

Growing community of inventors

Tokyo, Japan

Akihiro Kondoh