ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
We fabricated by metal organic deposition (MOD) using trifluoroacetic acid (TFA) via the“211 process”, and then evaluated the phase formation, texture evolution, and critical properties as afunction of the firing temperature and film thickness. In the fabrication process, Y2Ba1Cu1Ox andBa3Cu5O8 powders were used as precursors instead of Y-, Ba- and Cu-based acetates. The films werefired in the temperature range of 750°C -800°C and the film thickness of films was controlled byrepeating the number of coating cycles. The microstructure varied significantly with the firingtemperature. The grains size increased, the film became denser, and the degree of the texture andphase purity varied with increasing firing temperature. The films fired at 775°C after calcining at4005 showed the highest critical current (Ic) of 18 A/cm-width, which corresponds to a criticalcurrent density (Jc) of 0.9 MA/cm2. For multi-coated films, the Ic increased from 18 in the singlycoated film to 100 A/cm-width with the triply coated film. In contrast, the corresponding Jc were inthe range of 0.9-1.2 MA/cm2. Both Ic and Jc values decreased as the coating number repeated furtheras a result of the degraded microstructure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.243.pdf
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