Effects of solid isolation medium on the microstructure and magneticproperties of one-step sintered L10-FePtCu nanoparticles-FePtCu
Effects of solid isolation medium on the microstructure and magneticproperties of one-step sintered L10-FePtCu nanoparticles-FePtCu
复制标题
固体隔离介质对一步烧结L10-FePtCu纳米颗粒-FePtCu微观结构和磁性能的影响
DOI：
10.1016/j.jallcom.2022.164748
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发表时间：
2022
影响因子：
6.2
通讯作者：
Wenli Pei
中科院分区：
文献类型：
--
作者：
Shizhi Dong;Yuping Ju;Yanan Jiang;Chao Meng;Runqing;Chun Wu;Wenli Pei
为了探索一种更有效的工艺参数来控制液相辅助一步烧结法的微结构和磁性能，研究了隔离介质尺寸和均匀性对L10-FePtCu纳米颗粒的影响。L10-FePtCu纳米颗粒的晶粒尺寸（d）通过减小固体隔离介质的平均尺寸（D）而被细化，并且关系可以近似为d = 6.60 ×D1/3− 9.14。减小介质尺寸抑制了L10相的无序-有序转变，而增大介质尺寸均匀性则促进了L10相的无序-有序转变。当采用中等粒度、均匀性最好的NaCl介质（约8 μm）时，L10-FePtCu纳米颗粒的有序度、矫顽力和磁能积最高。研究表明，控制固相隔离介质与前驱体之间的界面是一种有效的策略，可以调节一步烧结高度有序L10相纳米颗粒的微结构和磁性能。
To explore a more efficient process parameter for controlling the microstructure and magnetic properties ofliquid-phase assisted one-step sintering method, the effects of isolation medium size and uniformity onL10-FePtCu NPs have been studied. The grain size (d) ofL10-FePtCu NPs has been refined by decreasing the average size of solid isolation mediums (D), and the relationship can be approximated asd= 6.60 ×D1/3− 9.14. The disorder-order transition of theL10phase has been inhibited by decreasing the medium size, however, it has been facilitated by increasing the medium size uniformity. The ordering degree, coercive force, and magnetic energy product ofL10-FePtCu NPs reach the highest when using the middle sized and best uniformity NaCl mediums (about 8 µm). This research indicates that controlling the interface between the solid isolation mediums and the precursors is an effective strategy to tune the microstructure and magnetic properties of one-step sintered highly orderedL10phase NPs.