Sumitomo Electric Industries, Limited

Sumitomo Electric, Ltd.

Kazuhisa Yamauchi

Kazuo Sawada

Kenichi Sato

Yoshihiro Nakai

Tetsuji Jodai

Kazuya Ohmatsu

Minoru Yokota

Masanobu Nishio

Tomoji Gotoh

Syuji Yazu

Takasi Kondo

Yasumasa Hanaki

Saburo Yosimura

Tetsuya Ishida

A method of producing single crystals is characterized in that in withdrawing a semiconductor or dielectric material from its molten state while allowing it to grow into a single crystal solid, a die heated to a temperature higher than the solidifying point of the melt is disposed at the melt withdrawing outlet and the single crystal is withdrawn through the die.

Apparatus for producing single crystals

A powder-in-tube method of producing an oxide superconduction wire is disclosed in which a preformed copper oxide superconducting powder is continuously filled into a tube precursor having a U shape cross-section formed from a long strip of metal material. The tube precursor is formed into a tube by bending and welding. The resulting tube is drawn to a reduced cross-section and further heated to sinter the packed powder to form the finished oxide superconducting wire.

Fabrication of superconducting oxide wires by powder-in-tube method

Method and apparatus for withdrawing long-sized objects

A heat-resistant aluminum alloy for electrical use, having high heat resistance and conductivity, obtained by subjecting an Al-Zr alloy comprising 0.23-0.35% Zr, the balance consisting of ordinary impurities and aluminum, to melting, casting, hot rolling in the state of high temperature or continuous heating, cold working to a predetermined size, ageing at a temperature within the range of 310.degree. C.-390.degree. C. for 50-400 hours so that Al.sub.3 Zr is dispersed uniformly and in fine particles, and, optionally, further cold working to a degree not exceeding 30% of reduction of area. The resultant aluminum alloy has conductivity in excess of 58% IACS, same strength as 1350 aluminum wire, and 10% softening temperature higher than 400.degree. C. at one hour annealing.

High conductive heat-resistant aluminum alloy

Growing community of inventors

Osaka, Japan

Kazuhisa Yamauchi