简单化合物MgB2超导性的发现引起了世界科学家对其组织结构、超导原理、制备方法及应用前景的广泛兴趣.针对MgB2单晶制备过程中存在镁的气化温度很低,MgB2在镁的沸点以下溶解度很小等不利因素,在国际上率先提出了从过冷熔体中的相选择与控制入手,采用深过冷快速定向凝固技术来制备高品质、大尺寸MgB2单晶的新思路.
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