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徑向溫度梯度對熔化生長大塊YBCO超導體形貌及性能的影響
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TM260.14

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The Effects of Radial Temperature Gradient on the Macrostructure and Properties of MTG Large Bulk YBCO Superconductor
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    摘要:

    用實驗的方法研究了徑向溫度梯度對熔化生長ＹＢＣＯ大塊超導體形貌及性能的影響。結(jié)果表明，正的徑向溫度梯度有利于抑制ＹＢＣＯ大塊超導體的成核數(shù)，制得的樣品具有扇形形貌，晶疇區(qū)少而大，樣品具有高的磁懸浮力。負的徑向溫度梯度則不然，制得的樣品無規(guī)則形貌，晶疇區(qū)多且小，磁懸浮力低。對上述結(jié)果從理論上給出了定性解釋

    Abstract:

    The effects of radial temperature gradient on the macrostructure and properties of MTG bulk YBCO superconductor have been investigated. The results indicate that a positive radial temperature gradient is favourable for depressing the nucleation number of YBCO bulk superconductors during the MTG process. Samples fabricated in this way is composed of a few large fan-shaped YBCO Superconducting crystal domains, and its magnetic levitation force is higher. On the contrary, a negative radial temperature gradient is favourable for randomly nucleation, and produces a sample with many small crystal domains randomly oriented. The magnetic levitation force of the sample is lower.

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楊萬民 汪京榮.徑向溫度梯度對熔化生長大塊YBCO超導體形貌及性能的影響[J].稀有金屬材料與工程,1996,(4):30~33.[Yang Wanmin, Wang Jingrong, Zhang Cuiping, Li Jianping, Wang Tiancheng, Zhang Pingxiang, Wu Xiaozu, Zhou Lian. The Effects of Radial Temperature Gradient on the Macrostructure and Properties of MTG Large Bulk YBCO Superconductor[J]. Rare Metal Materials and Engineering,1996,(4):30~33.]
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