Synthesis of Pure 80K Bulk Material in Y-Sr-Cu-O System
碩士 === 淡江大學 === 物理研究所 === 81 === In this research the frabrication of 80K phase bulk material of high Tc superconducting Y-Sr-Cu-O system was studied. Solid state reaction method was used. Due to the instability of the structure of 80K phas...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1993
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| Online Access: | http://ndltd.ncl.edu.tw/handle/63370117267843112693 |
| Summary: | 碩士 === 淡江大學 === 物理研究所 === 81 === In this research the frabrication of 80K phase bulk material of
high Tc superconducting Y-Sr-Cu-O system was studied. Solid
state reaction method was used. Due to the instability of the
structure of 80K phase, doping of Mo atom is needed in the
material preparation. Although the structure of 80K phase was
identified to be similar to YBCO123 as that of 40k phase, but
its chemical composition is Sr-rich and deviated from the
proportionality of 1-2-3. The annealing temperature for 80K
phase varies from 1050℃ to 1175℃ when the oxygen pressure
change from 1x10^-3 torr to 6atm. The best post-annealing
condition is at 900℃ and O2 of 1atm.
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