论文标题
使用高压烧结（BA，NA）Fe2AS2圆线中临界电流密度的增强
Enhancement of critical current density in (Ba,Na)Fe2As2 round wires using high-pressure sintering
论文作者
论文摘要
我们使用粉末中的方法和热等静压按压制造（BA，NA）FE2AS2超导电线。通过改善粉末合成过程与以前的研究相比，获得了高度纯的电线制造物质。在100 KOE的磁场下，最大的临界电流密度（JC）在T = 4.2 K时达到40 Kacm-2。该值不仅超过了以前（BA，NA）FE2AS2线的运输JC值，还超过所有基于铁的超导圆线的值。多晶粉合成的改进对于增强JC起着关键作用。此外，阐明的是，高压烧结的较高致密化以及由于绘图而导致的电线核心中晶粒的纹理也有效增加了。还讨论了（BA，NA）Fe2AS2线与（BA，K）Fe2AS2电线相比的优点。
We fabricated (Ba,Na)Fe2As2 superconducting wires using the powder-in-tube method and hot isostatic pressing. By improving powder synthesis processes compared with previous studies, highly pure raw materials for the wire fabrication were obtained. The largest transport critical current density (Jc) reached 40 kAcm-2 at T = 4.2 K under a magnetic field of 100 kOe. This value exceeds not only the value of transport Jc of the previous (Ba,Na)Fe2As2 wire but also those of all iron-based superconducting round wires. Improvements of polycrystalline powder synthesis play a key role for the enhancement of Jc. Furthermore, it was clarified that higher densification by high-pressure sintering and the texturing of grains in the core of the wire due to drawing also increased Jc effectively. Advantages of (Ba,Na)Fe2As2 wires compared with (Ba,K)Fe2As2 wires are also discussed.
