RELATIONSHIP BETWEEN MICROSTRUCTURE AND CRITICAL PARAMETERS IN HIGH CRITICAL TEMPERATURE SUPERCONDUCTING BISMUTH-LEAD-STRONTIUM-CALCIUM-COPPER-OXIDE THICK FILMS.

Type of article: Article

Summary

THE FILMS WERE EITHER SOLID STATE SINTERED OR FIRST MELT PROCESSED AND THEN ANNEALED OVER A LONG PERIOD OF TIME. THE FILMS WERE PRIMARILY MADE UP OF THE 2223 PHASE. THE SOLID STATE SINTERED FILMS HAD RANDOMLY ARRANGED FLAKY CRYSTALS. THE MELT PROCESSED FILMS WERE STRONGLY TEXTURED. A PULSE METHOD WAS UTILIZED FOR CRITICAL CURRENT MEASUREMENTS. THE MAGNETIC PROPERTIES OF BOTH THE SOLID STATE SINTERED AND MELT PROCESSED FILMS WERE SIMILAR. VARIATION OF ANNEALING PROCEDURES RESULTED IN CLEARLY DIFFERENT MICROSTRUCTURES, WHICH IN TURN MANIFESTED ITSELF IN DIFFERING SUPERCONDUCTING PROPERTIES. FROM THE POINT OF VIEW OF APPLICATIONS, THE MELT TEXTURING PROCESS SEEMS TO BE PROMISING.

Details

Original title: RELATIONSHIP BETWEEN MICROSTRUCTURE AND CRITICAL PARAMETERS IN HIGH CRITICAL TEMPERATURE SUPERCONDUCTING BISMUTH-LEAD-STRONTIUM-CALCIUM-COPPER-OXIDE THICK FILMS.
Record ID : 1991-1952
Languages: English
Source: Cryogenics - vol. 30 - n. 7
Publication date: 1990

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Indexing

Themes: Superconduction
Keywords: Superconduction; Structure; Oxide; Copper; Ceramics; Calcium; Lead; Bismuth; Superconductor; Strontium; High temperature; Superconducting film; Critical current