Anisotropic (Sm,Pr)1Co5 based nanoflakes fabricated by high-energy ball milling in polar milling medium
Anisotropic (Sm,Pr)1Co5 based nanoflakes fabricated by high-energy ball milling in polar milling medium
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极性研磨介质中高能球磨制备各向异性 (Sm,Pr)(1)Co-5 基纳米片
DOI：
10.1016/j.jallcom.2013.11.200
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发表时间：
2014-03
影响因子：
6.2
通讯作者：
Xiangyi Zhang
中科院分区：
文献类型：
--
作者：
Xiaohong Li;Guangwei Huang;Yongmei Zhang;Xiangyi Zhang
以乙醇和聚乙烯吡咯烷酮为极性球磨介质，采用高能球磨法制备了具有低长径比、小面内尺寸、显著（0 0 l）离面织构和高室温介电常数的各向异性（Sm，Pr）1Co 5基纳米片.研究了球磨时间对球磨后片状样品的晶体结构、形貌和磁性能的影响。随着球磨时间从2 h增加到40 h，球磨后的薄片的厚度和面内尺寸单调减小，但仍保持较低的纵横比（5-50）和较强的面外织构（0.0l）。球磨后的片状物的结晶度逐渐增加，甚至当片状物的厚度达到纳米级时。球磨40 h后，织构化纳米晶片的厚度为40 nm，面内尺寸为0.2 ~ 2 μm，矫顽力为12.2 kOe，有利于织构化交换弹簧磁体和抗涡流磁体的制备。
Anisotropic (Sm,Pr)1Co5based nanoflakes with a low aspect ratio, small in-plane size, pronounced (0 0l) out-of-plane texture, and high room temperature coercivity were fabricated by high-energy ball milling with ethanol and polyvinylpyrrolidone as polar milling medium. The effect of milling time on the crystal microstructure, morphology, and magnetic properties of milled flakes were investigated. With increasing milling time from 2 to 40 h, the thickness and in-plane size of milled flakes reduce monotonously, while a low aspect ratio of 5–50 and a strong (0 0l) out-of-plane texture are preserved. The coercivity of milled flakes increases gradually even when the flake thickness reaches a nanometer scale. After 40 h milling, the textured nanocrystalline flakes have a thickness of 40 nm, a small in-plane size of 0.2–2 μm, and a high coercivity of 12.2 kOe, which are advantageous for the preparation of textured exchange-spring magnets and eddy-current-resistant magnets.
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