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采用ZrC和ZrB2掺杂在常压条件下制备了MgB2/Fe超导带材.利用X射线衍射、扫描电子显微镜、电测和磁测等手段,重点研究了ZrC和ZrB2掺杂对超导带材组织和性能的不同影响.结果显示,ZrC掺杂导致带材临界电流密度的降低,临界转变温度保持不变;ZrB2掺杂则显著提高了带材高场下的临界电流密度,而临界转变温度略微下降了0.5K.实验结果表明,采用ZrB2掺杂原位PIT技术可制备出具有高临界电流密度的MgB2带材.
The MgB2 / Fe superconducting tapes were prepared by ZrC and ZrB2 doping at atmospheric pressure. The effects of ZrC and ZrB2 doping on the superconducting tapes were studied emphatically by X-ray diffraction, scanning electron microscopy, electrical measurements and magnetic measurements. The results show that ZrC doping leads to the decrease of the critical current density and the critical transition temperature. The ZrB2 doping significantly increases the critical current density in the high field of strip, The temperature dropped slightly by 0.5 K. The experimental results show that MgB2 ribbon with high critical current density can be prepared by ZrB2 doping in-situ PIT.