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首页> 外文期刊>Journal of Materials Engineering and Performance >Aging and Environmental Effects on YBa_2Cu_3O_(6.95) Superconductor
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Aging and Environmental Effects on YBa_2Cu_3O_(6.95) Superconductor

机译：YBa_2Cu_3O_（6.95）超导体的时效及环境效应

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摘要

The effect of aging and environmental degrading on a YBa_2Cu_3O_(6.95) ceramic superconductor has been studied by x-ray diffraction, scanning electron microscopy, infrared spectroscopy, and electrical resistivity measurements. The superconductor prepared by solid state reaction was well characterized and then exposed to the normal laboratory environment for more than three years. The material showed substantial microstructural degradation with a small decrease in the transition temperature from normal to superconducting state (T_c). IR spectroscopy reveals the presence of water and carbonate. The damage in oxygen content can be restored by reannealing in oxygen for about six hours at 470 deg C, but the restoration of exactly the same microstructural and electrical characteristics is not possible.
机译：通过X射线衍射，扫描电子显微镜，红外光谱和电阻率测量研究了老化和环境降解对YBa_2Cu_3O_（6.95）陶瓷超导体的影响。通过固相反应制备的超导体已被很好地表征，然后在正常的实验室环境中暴露了三年以上。该材料显示出显着的微结构降解，从正常状态到超导状态的转变温度（T_c）的降低很小。红外光谱表明存在水和碳酸盐。氧含量的破坏可以通过在470摄氏度的氧气中再退火约6小时来恢复，但是不可能恢复完全相同的微观结构和电特性。

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