在低磁场下，硼化镁的临界电流密度与三铌化锡相当，但是在较高的磁场下却下降得很快。

The critical current density of pure MgB2 is comparable to that of triniobium tin at low magnetic fields but falls off much more rapidly at higher fields.

youdao

在低磁场下，硼化镁的临界电流密度与三铌化锡相当，但是在较高的磁场下却下降得很快。

The critical current density of pure MgB2 is comparable to that of triniobium tin at low magnetic fields but falls off much more rapidly at higher fields.

youdao