Infiltration growth of Mg-doped Nd–Ba–Cu–O seed crystals for the fabrication of large grain RE–Ba–Cu–O bulk superconductors
Infiltration growth of Mg-doped Nd–Ba–Cu–O seed crystals for the fabrication of large grain RE–Ba–Cu–O bulk superconductors
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DOI：
10.1088/0953-2048/26/5/055019
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发表时间：
2013-05
影响因子：
3.6
通讯作者：
Guo-Zheng Li;Dejun Li;Xiangyun Deng;Jian-hua Deng;Wanmin Yang
中科院分区：
文献类型：
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作者：
Guo-Zheng Li;Dejun Li;Xiangyun Deng;Jian-hua Deng;Wanmin Yang
采用浸渍生长(IG)技术，在Nd4Ba2Cu2O10(Nd422)前驱体粉末和Nd2O3：CuO：BaCuO2=1：6：10的液源中添加1wt%的MgO，成功地制备了掺镁NdBCO(NdBCO)晶种。差热分析(DTA)结果表明，经处理的掺镁NdBCO晶体的分解温度比普通不含镁的NdBCO晶种提高了约20℃，可作为普通晶种用于诱导任何RE-BaCuO(REBCO)单晶的生长。这一结果与熔融生长(MG)掺镁NdBCO晶体中观察到的结果一致。最后，用所制备的籽晶成功地生长了高度c轴取向的Gd-BaCuO(GdBCO)和Y-BaCuO(YBCO)大颗粒。
By employing the infiltration growth (IG) technique, Mg-doped Nd–Ba–Cu–O (NdBCO) seed crystals were successfully prepared through 1 wt% MgO addition both to a Nd4Ba2Cu2O10 (Nd-422) precursor powder and to a liquid source with the composition Nd2O3:CuO:BaCuO2 = 1:6:10. Differential thermal analysis (DTA) results showed that the decomposition temperature of the processed Mg-doped NdBCO crystals increased by about 20 °C compared with the general, Mg-free NdBCO seeds, thus they can be used as generic seed crystals to induce the growth of any RE–Ba–Cu–O (REBCO) single grain. This result is consistent with that observed in melt growth (MG) processed Mg-doped NdBCO crystals. Finally, highly c-axis oriented Gd–Ba–Cu–O (GdBCO) and Y–Ba–Cu–O (YBCO) large grains were successfully grown using the produced seed crystals.