Process for the preparation of a superconductor material of the mixed oxide type

US5798034A · kind A · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Philippe Gendre · Nanterre, FR
• Pierre Regnier · Les Ulis, FR
• Lelia Schmirgeld-Mignot · Palaiseau, FR
• Andre Marquet · Paris, FR

Key dates

• Filing date: Mar 3, 1997
• Grant date: Aug 25, 1998
• Expiry date: Mar 3, 2017

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N60/0548

Abstract

The invention relates to a process for the preparation of a superconductor material of the mixed oxide type, such as oxides of the YBaCuO and Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8 type. This process consists of the deposition by electrolysis on a conductive substrate of successive layers of metallic elements entering in the constitution of the superconductor material, using a single element in each layer and carrying out, following the deposition of at least one of the layers, an intermediate oxidation-reaction heat treatment for fixing the element of said layer before depositing the following layer, optionally repeating one or more times at least part of the aforementioned operations, and subjecting all the layers to a final, oxidation heat treatment to form the mixed superconductor oxide. In this process, as a result of the order of the deposition of the layers and the performance of one or more intermediate, oxidation-reaction, heat treatments, it is possible to obtain a narrow superconductor transition and high critical current densities.