日本Ｋｏｂｅ钢铁公司和科技局金属材料工程实验室联合开发出 2 1 .1特斯拉的磁体 ,将其组入磁共振图像装置中可大大提高分析蛋白质结构的精度。　　此磁体是通过装配由铌—钛和铌—锡制成的超导电缆而制成的。通过将锡的含量由1 3%提高到 1 5 %并加入钽 ,可提高磁场强度。采用 Kobe Steel Corporation of Japan and the Metal Materials Engineering Laboratory of the Science and Technology Bureau jointly developed a 21.1 Tesla magnet, which can be incorporated into a magnetic resonance imaging device to greatly improve the accuracy of protein structure analysis. This magnet is made by assembling a superconducting cable made of tantalum-titanium and tantalum-tin. By increasing the tin content from 13% to 15% and adding helium, the magnetic field strength can be increased. use