超导是超导电性的简称 ,它是指金属、合金或其他材料电阻变为零的性质 .超导现象的发现与极低温度的探索密切相关 ,而极低温度的获得又是从气体液化技术开始的 .早在 19世纪前半叶人们就开始研究气体的液化 ,到了 19世纪末 ,已经液化了除氦以外的所有气体 ,也得到了 14 K的低温 Superconductivity is the abbreviation of superconductivity. It refers to the nature of the resistance of metals, alloys, or other materials becoming zero. The discovery of superconductivity is closely related to the exploration of extremely low temperatures, and the acquisition of extremely low temperatures is also derived from the liquefaction of gases. The technology began. As early as the first half of the 19th century, people began to study the liquefaction of gases. By the end of the 19th century, all gases except helium had been liquefied, and 14 K was also obtained.