The properties at20 to30 K have improved to the point that it appears high-current-density applications, such as magnets, can be made to operate either with cryogens such as liquid hydrogen or liquid neon or with closed-cycle refrigerators.

• 在20~0K之间的性质已经改善到一定程度，利用液态氢或液态氖做为冷却剂，或是采用封闭循环冷却机，就可以进行高电流密度的应用（如做为磁铁）覆盖涂料的原型导线或甚至某些初步的磁铁已经制作出来。