Preparation of LaFeAsO0.9F0.1 wires by the powder-in-tube method
Preparation of LaFeAsO0.9F0.1 wires by the powder-in-tube method
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DOI：
10.1088/0953-2048/21/10/105024
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发表时间：
2008-10-01
影响因子：
3.6
通讯作者：
Ma, Yanwei
中科院分区：
文献类型：
--
作者：
Gao, Zhaoshun;Wang, Lei;Ma, Yanwei
我们报道了首次通过管内粉末（PIT）方法制备了以钛为缓冲剂的铁护套LaFeAsO0.9F0.1线材。与常见的两步真空石英管合成法相比，PIT法合成新型铁基层状超导体更加方便、安全。 X射线衍射结构分析表明，LaFeAsO0.9F0.1是该合成方法生产的线材中的主相。 LaFeAsO0.9F0.1丝的转变温度约为25 K。显微照片显示晶粒尺寸为1-3μm的均匀微观结构。结果表明，PIT 工艺有望用于制备铁基层状超导体。
We report that Fe sheathed LaFeAsO0.9F0.1 wires with Ti as a buffer were fabricated by the powder-in-tube (PIT) method for the first time. Compared to the common two-step vacuum quartz tube synthesis method, the PIT method is more convenient and safe for synthesizing the novel iron-based layered superconductors. Structural analysis by means of x-ray diffraction shows that LaFeAsO0.9F0.1 is the main phase in wires produced by this synthesis method. The transition temperature of the LaFeAsO0.9F0.1 wire is around 25 K. The micrograph shows a homogeneous microstructure with a grain size of 1-3 mu m. The results suggest that the PIT process is promising for preparing iron-based layered superconductors.