Cobalt;samarium | 53239-26-2

• 分子结构分类: 无机化合物 - 均相金属化合物 - 金属间过渡金属化合物
• 英文名称: Cobalt;samarium
• 英文别名: cobalt;samarium
• CAS: 53239-26-2
• 化学式: Co₇Sm
• 分子量: 563.312
• InChiKey: RVKPNNMFZGELPQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.02
• 重原子数：
  7
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  Cobalt;samarium 以 neat (no solvent) 为溶剂， 生成 SmCo5 、 Sm2Co17
  参考文献：
  名称：

  Effects of Hf and CNTs on magnetic transformation and thermal stabilities of TbCu7-type Sm–Co matrix ribbon magnets

  摘要：

  SMCo7, SMCo6.9Hf0.1, SMCo6.9Hf0.1(CNTs)(0.05) and SmCo6.9Hf0.1(CNTs)(0.1) melt-spun ribbons are prepared at a speed of 40 m/s. The phase structure, magnetic transformation and thermal stability of the ribbons are studied using thermal analysis, high temperature in-situ XRD and thermomagnetic analysis. The results show the Hf and CNTs (carbon nanotubes) additions have no influence on the formation of TbCu7-type structure. Nevertheless, Hf addition may cause large heat storage; CNTs addition can lead to crystal-boundary blocking effect. The M-T curves of SmCo7 matrix ribbons can all be divided into seven stages. The 1:7H decomposition, CoCx precipitation and 1:5 phase decrease successively emerge when the temperature increases from room temperature to 1100 degrees C. (C) 2009 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jallcom.2009.08.027
• 作为产物：
  描述：

  以 solid 为溶剂， 生成 Cobalt;samarium
  参考文献：
  名称：

  Microstructure and magnetic properties of SmCo films

  摘要：

  We have studied the role of deposition pressure on the structure and magnetic properties of SmCo films sputtered on Si(100) substrates. The effect of variation of Sm content on microstructure and magnetic properties was studied as sputter pressure was changed. The films deposited on heated substrates up to 450 ° C and the crystalline c-axis is randomly aligned in the film plane. The films showed hard magnetic properties with in-plane anisotropy. Room temperature intrinsic coercive forces H-i(c) up to 15.5 kOe have been observed and the maximum energy product of SmCo films was estimated at 15.5 MGOe. © 2004 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.jmmm.2004.11.383

文献信息

• Structure and magnetic properties of SmCo7−xGax (0⩽x⩽1.2) alloys
  作者：Ji-Bing Sun、Shao-Jing Bu、Wei Yang、He-Wei Ding、Chun-Xiang Cui、Han-Xiao Zheng

  DOI：10.1016/j.jallcom.2013.09.017

  日期：2014.1

  Abstract In this article, the effects of Ga addition on the structure and magnetic properties of SmCo7 alloy were studied. The results show that a stable TbCu7-type single phase can be obtained in as-cast SmCo7−xGax alloys when a proper amount of Ga is introduced (x = 0.9). Meanwhile, all SmCo7−xGax ribbons melt-spun at 40 m/s are composed of single TbCu7-type phase. So both the appropriate doping

  摘要 本文研究了Ga的添加对SmCo7合金结构和磁性能的影响。结果表明，当引入适量的 Ga (x = 0.9) 时，可以在铸态 SmCo7-xGax 合金中获得稳定的 TbCu7 型单相。同时，所有以 40 m/s 速度熔纺的 SmCo7−xGax 带都由单一的 TbCu7 型相组成。因此，适当的 Ga 掺杂，尤其是快速的冷却速度，都可以有效地稳定 TbCu7 型结构。此外，Ga的添加不仅影响1:7H相的稳定性和有序度，而且影响成核的均匀性。磁性测试表明，薄带的矫顽力、剩磁和剩磁比随着 Ga 的添加而增加，并达到最大值（7117.0 ± 2081.5 Oe、36.7 ± 4.2 emu/g 和 0.771 ± 0.037，分别）当 x = 0.9 时。同时，Sm-Co相的最大磁化强度和居里温度（Tc）随着Ga含量的增加而降低。特别是SmCo7−xGax带中的TbCu7型相在500℃以下基本稳定，并且还讨论了加热过程中的相变。
• Hydrogenation and disproportionation of SmCo5 compound by high energy ball milling in heptane
  作者：J.J. Zhang、Y. Yan、H.M. Gao、H.M. Geng、X.Y. Feng、Z.P. Hou、H.D. Li、W.Q. Wang、F. Su、X.B. Du

  DOI：10.1016/j.jmmm.2014.08.053

  日期：2015.1

  Abstract A traditional hydrogenation disproportionation desorption recombination (HDDR) technique succeeds in fabricating bonded Nd–Fe–B magnet while encounters difficulty in the fabrication of Sm–Co magnet, due to the higher thermodynamic stability of the Sm–Co compounds against the disproportionation by hydrogen. To induce the disproporationation of Sm–Co compounds, high pressure hydrogen under high temperature

  摘要 传统的氢化歧化解吸复合 (HDDR) 技术成功地制造了粘结 Nd-Fe-B 磁体，但在制造 Sm-Co 磁体时遇到了困难，因为 Sm-Co 化合物具有较高的热力学稳定性，可以抵抗氢歧化。 . 为了诱导 Sm-Co 化合物的歧化，必须在高温下使用高压氢气。本文报道了不涉及气态氢的 SmCo 5 化合物的氢化和歧化反应：庚烷中的高能球磨。H原子来自庚烷。研磨超过 600 分钟，SmCo 5 相完全歧化为 Sm 氢化物（SmH 2 ± δ ）和立方 Co。在真空中将歧化粉末从室温加热至 800 °C，观察到两个解吸过程，一个在 200 到 400 °C 之间，另一个在大约 600 °C 左右。通过气相色谱法证明解吸的气体是氢气。加热产物主要由具有 TbCu 7 结构的六方 SmCo 7 相组成。SmCo 7 相的矫顽力大于1T，能够满足永磁应用的需要。过多的高能球磨导致出现少量 SmCoC
• Structural and magnetic studies on spark plasma sintered SmCo5/Fe bulk nanocomposite magnets
  作者：N.V. Rama Rao、R. Gopalan、M. Manivel Raja、V. Chandrasekaran、D. Chakravarty、R. Sundaresan、R. Ranganathan、K. Hono

  DOI：10.1016/j.jmmm.2006.10.057

  日期：2007.5

  consolidated into bulk shape by spark plasma sintering (SPS) technique. The evolution of structure and magnetic properties were systematically investigated in milled powders as well as in SPS samples. A maximum coercivity of 8.9 kOe was achieved in spark plasma sintered SmCo 5 +5 wt% Fe sample. The exchange spring interaction between the hard and soft magnetic phases was evaluated using δ M – H measurements

  摘要 SmCo 5 + x wt% Fe ( x = 0 、 5 和 10 ) 纳米复合粉末通过机械研磨合成，并通过放电等离子烧结 (SPS) 技术固结成块状。在研磨粉末和 SPS 样品中系统地研究了结构和磁性的演变。在放电等离子体烧结的 SmCo 5 +5 wt% Fe 样品中实现了 8.9 kOe 的最大矫顽力。使用 δ M – H 测量评估硬磁相和软磁相之间的交换弹簧相互作用，分析表明，含有 5 wt% Fe 的 SPS 样品比含有 10 wt% Fe 的样品在磁相之间具有更强的交换耦合.
• Origins of the significant improvement in nanocrystalline Samarium–Cobalt’s magnetic properties when doping with Niobium
  作者：Tzu-Yuan Li、S.H. Chiou、H.W. Chang、S.C. Lo、C.C. Hsieh、W.C. Chang、J. van Lierop、C.-H. Hsiao、Y.W. Hsu、H. Ouyang

  DOI：10.1016/j.jallcom.2014.10.004

  日期：2015.2

  SmCo7-based compounds are prototypical rare-earth based hard magnetic materials that are the backbone of numerous devices and applications. We have found that by doping the SmCo7 phase with Niobium (e.g. SmCo6.7Nb0.3), the enhanced coercivity being measured. Using a combination of microstructural and compositional characterization techniques with ab initio calculations, we find that the Nb-doping stabilizes the nanocrystalline nature of the material by residing at the 2e site of the SmCo7 structure, decreases the average grain size, and substantially increases the magnetocrystalline anisotropy constant (K) (e.g. from 1.25 x 10(7) erg/cm(3) for SmCo7 to 1.40 x 10(7) erg/cm3 for SmCo6.7Nb0.3). A significant enhancement in coercivity with Nb doping is attributed to the increased K and the reduced grain size. (C) 2014 Elsevier B.V. All rights reserved.
• The effects of CNTs and/or Si additions on the structure and magnetic properties of SmCo7-based alloys
  作者：Ji-Bing Sun、Shao-Jing Bu、He-Wei Ding、Chun-Xiang Cui、Wei Yang、Li Zhang

  DOI：10.1016/j.jallcom.2013.02.103

  日期：2013.6

  In this work, SmCo7, SmCo7(CNTs)(0.05), SmCo6.1Si0.9, SmCo6.1Si0.9(CNTs)(0.05) as-cast ingots and ribbons were prepared by arc-melting and melt-spinning methods respectively. The effects of Si and/or CNTs additions on the structure and magnetic properties of SmCo7-based alloys were investigated. It was found that adding Si into the SmCo7-based as-cast alloys can stabilize the TbCu7-type structure, while CNTs addition facilitates the formation of Th2Zn17-type phase. However, for SmCo7-based ribbons, the cooling rate plays a more significant role in the formation of a single TbCu7-type phase than the doped elements. The coercivity (H-c) and remanence ratio (M-r/M-2T) of all SmCo7-based ribbons increase with the addition of CNTs and/or Si. In particular, simultaneous addition of CNTs and Si can improve the Hc and Mr/M2T more effectively than that of a single one. On the other hand, the magnetization of SmCo7-based ribbons at high temperature is improved by CNTs addition while decreased by Si addition. At the same time, the thermal stability of ribbons decreases when Si is introduced. The possible mechanism of magnetization reversal in the SmCo7-based ribbons containing Si and/or CNTs is considered to be the combination of nucleation and pinning. (C) 2013 Elsevier B.V. All rights reserved.