Hitachi Metals, Ltd.

Toshiyuki Kasakoshi

Yasunobu Ogata

Tsutomu Iimura

Ryoichi Shibata

Yusuke Iyori

Kenzi Maruta

This invention provides a method for producing an oxide superconductor which has a uniform texture and is markedly high in sintered density and current density. The method involves the formation of intermediate products from the starting materials. The intermediate products are then used to form the final product. Specifically, to form an oxide superconducting material having a compositional formula

Method for producing ceramic superconducting material using intermediate

The resistive layer of an electrically heated toner fixing roll includes a Fe-Cr-Al metal alloy phase and a ceramic substrate phase thermally sprayed onto the surface of a thermally and electrically insulated metal roll. The ceramic substrate can be Al.sub.2 O.sub.3 and the alloy can be 64-89 wt % Fe; 10-30 wt % Cr; and 2-10 wt % Al. Al.sub.2 O.sub.3 can be the insulating layer, and the metal roll can be iron, or an iron-based alloy.

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Kumagaya, Japan

Toshiyuki Kasakoshi