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題名 | 鉍系帶狀超導體製程與特性分析研究 |
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作者 | 許清賢; 歐陽力行; 高景海; | 書刊名 | 材料科學 |
卷期 | 27:4 1995.12[民84.12] |
頁次 | 頁241-248 |
分類號 | 440.34 |
關鍵詞 | 起始粉末; 共沈法; 帶狀超導體; 織構; Starting powder; Coprecipitated method; Superconducting tape; Texture; |
語文 | 中文(Chinese) |
中文摘要 | 本研究主要探討(Bi,Pb)-Sr-Ca-Cu-O帶狀超導體,在不同起始粉末製程 下,對臨界電流密度、臨界溫度與臨界磁場強度的影響。四種粉末分別如下:利 用共沉法所得原始粉末、經鍛燒4小時、鍛燒12小時、及鍛燒65小時。帶狀超導 體製程採用銀管被覆超導粉末法,經型鍛、輥軋等加工後,再施以830℃x40小時 熱處理。結果得知:起始粉末以鍛燒4小時者為最佳,因內含有適量的2223相及壓 延燒結後形成的織構組織,故其臨界電流密度最高。探討燒結溫度與帶材厚度對 Jc值的影響,得知:厚度為0.07mm帶材於835℃燒結時為最佳厚度與溫度組合。 |
英文摘要 | In this study, the influences of different starting powders on the critical current density, critical temperature and critical magnetic field of (Bi,Pb)-Sr-Ca-Pb-Cu-O superconductingtape were investigated. The four different starting powders used were (a) raw coprecipitated powder (b) powder calcined for 4 hours (c) powder calcined for 12 hours and (d) powdercalcined for 65 hours. The Ag-sheathed BPSCCO superconducting tapes were fabricated bythe combined processes of swaging, rolling and heat treatment at 830℃ for 40 hours,followed by the analyses of XRD, DTA, SEM, and SQUID instruments. From the aboveanalyses, the highest Jc value was achieved from the starting powder calcined for 4 hours, because the powder contained of the proper 2223 phase and significant mechanical texture after rolling and sintering processes. Subsequently, the influences of different sintering temperatures and tape thicknesses on Jc values were studied. The optimum combination was obtained from the 0.07mm tapes calcined at 835℃. |
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