The results indicate that a positive radial temperature gradient is favourable for depressing the nucleation number of YBCO bulk superconductors during the MTG process.

• 结果表明，正的径向温度梯度有利于抑制YBCO大块超导体的成核数，制得的样品具有扇形形貌，晶畴区少而大，样品具有高的磁悬浮力。