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日本科学家发现一种普通的金属化合物——二硼化镁冷却到绝对温度39K（零下234摄氏度）时,会表现出超导特性。它是迄今发现的临界温度最高、性质特别稳定的一种金属化合物,为研制低成本高性能的超导材料开辟了新路。 此前发现的超导材料要么临界温度极低,要么成分复杂而且成本高昂,或者能够承载的电流强度较小。如果要大规模应用,例如制造超导输电线路,这些材料都不太经济实用。 日本青山学院的科学家说,他们将纯度为99.9％的镁粉与纯度为99％的无定形硼粉按1比2
Japanese scientists found that a common metal compound - magnesium diboride cooled to an absolute temperature of 39K (minus 234 degrees Celsius), will show superconducting properties. It is by far the highest critical temperature found in a particularly stable nature of a metal compound for the development of low-cost high-performance superconducting material has opened up a new path. Previously found superconducting materials either had very low critical temperatures, were complicated in composition and costly, or were less capable of carrying current. These materials are not cost-effective for large-scale applications, such as the manufacture of superconducting transmission lines. Aoyama Institute of Japan scientists said they will be 99.9% purity of magnesium and 99% purity of amorphous boron powder by 1 to 2