Grain growth and sintering in Bi–(Pb)—Sr—Ca—Cu—O superconductors made by sol-gel
1994 ◽
Vol 9
(2)
◽
pp. 286-291
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Keyword(s):
Sol Gel
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Bi—(Pb)—Sr—Ca—Cu—O superconductors were synthesized by sol-gel processing from nitrates by complexation with citric acid. Their grain growth and sintering above 800 °C were studied by Scanning Electron Microscopy (SEM) and Brunauer, Emmett, Teller (BET) porosimetry. The sintering was limited by anisotropic grain growth, and microcracks in 2212 phase grains were created due to the formation of 2223 phase.