Preparation of high-T<sub>c</sub>Bi-Pb-Sr-Ca-Cu-O ceramic superconductor by using the sol-gel method
Qiniun Xu; Lijian Bi; Dingkun Peng; Guanyao Meng; Guein Zhou; Zhiqlang Mao; Chengao Fan; Yuheng Zhang; Qiniun Xu; Univ. of Sci. & Technol. of China, Anhui, China; Lijian Bi; Univ. of Sci. & Technol. of China, Anhui, China; Dingkun Peng; Univ. of Sci. & Technol. of China, Anhui, China; Guanyao Meng; Univ. of Sci. & Technol. of China, Anhui, China; Guein Zhou; Univ. of Sci. & Technol. of China, Anhui, China; Zhiqlang Mao; Univ. of Sci. & Technol. of China, Anhui, China; Chengao Fan; Univ. of Sci. & Technol. of China, Anhui, China; Yuheng Zhang; Univ. of Sci. & Technol. of China, Anhui, China
Журнал:
Superconductor Science and Technology
Дата:
1990-11-01
Аннотация:
High-T<sub>c</sub> superconductors of the form Bi-Pb-Sr-Ca-Cu-O, with the 2223 phase as the main phase, were fabricated by a sol-gel method from an aqueous solution of metal acetates containing excess acetic acid with tartaric acid and glycol additions. Their zero resistance temperature was 105 K and T<sub>c</sub> (onset) was above 120 K. These samples exhibited excellent homogeneity and sinterability at relatively low firing temperature. Thermal analysis, infrared spectra and X-ray diffraction patterns revealed the mechanisms of decomposition of the organic compounds and crystallization of various phases.
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