iron;niobium | 12023-22-2

• 分子结构分类: 无机化合物 - 均相金属化合物 - 均相过渡金属化合物
• 英文名称: iron;niobium
• CAS: 12023-22-2
• 化学式: Fe₂Nb
• 分子量: 204.6
• InChiKey: ZFGFKQDDQUAJQP-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -0.01
• 重原子数：
  3
• 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：

  iron;niobium 、 氨 生成
  参考文献：
  名称：

  Nitrogenation and Hydrogenation Characteristics of Transition Metal−Iron Intermetallic Compounds

  摘要：

  Nitrogenation for the intermetallic compounds such as MFe2 (M = Ti, Zr, Nb, and Mo) or M'Fe (M' = Ti and V) and the subsequent hydrogenation for the resulting interstitial metal nitrides were carried out to characterize their nitrogen storage properties by heating in a NH3-H-2 mixed gas or N-2 gas at 450-500 degrees C for the former reaction and in H-2 gas at 450 degrees C for the latter one, respectively. Among the intermetallic compounds, the Laves-type MFe2 and the CrFe-type VFe compounds absorbed large amounts of nitrogen into their crystal lattices to transform into amorphous-like a-MFe2Nx and a-VFeNx. They reversibly desorbed nitrogen by the following hydrogenation with maintaining the amorphous-like structure. Qualitative and quantitative analyses of the nitrogen species generated in the desorption step revealed that most of the nitrogen released from the metal nitrides readily reacted with hydrogen to produce ammonia owing to the high reactivity of the atomic nitrogen stored in the intermetallic compounds. Furthermore, the amorphous-like a-TiFe2Nx-delta derived by the nitrogenation in the NH3-H-2 mixed gas and the subsequent hydrogenation in H-2 gas absorbed nitrogen even in N-2 gas at 500 degrees C as loaded with a Ru/Al2O3 catalyst on the surface. The nitrogen stored was also reversibly desorbed as ammonia, suggesting that the molecular nitrogen was converted to ammonia under ambient pressure via the nitrogen absorption - desorption cycle of (Ru/Al2O3/a-TiFe2Nx)/(Ru/Al2O3/a-TiFe2Nx-delta).

  DOI：

  10.1021/jp9916182
• 作为产物：
  描述：

  铁粉 、 铌 以 melt 为溶剂， 反应 336.0h， 生成 iron;niobium
  参考文献：
  名称：

  Fe 2 Nb和Fe 7 Nb 6金属间化合物的热容测量

  摘要：

  本文首次报道了Fe 2 Nb和Fe 7 Nb 6金属间化合物的摩尔热容。348和K之间1038合金是用电弧熔化高纯度金属在氩气下通量和后热处理在1200制备的结果通过差示扫描量热法（DSC）测量，在温度范围内进行获得 ∘下336ħ密封在氩气下的石英管中，以确保热力学平衡。然后使用X射线衍射（XRD）和扫描电子显微镜（SEM）对所得样品进行表征。使用20和50 K步的交替步法进行热容量DSC测量，得到的C p与每个温度间隔的中点相关联。由于数据中的分散，采用了简化的C p（T）曲线的拟合。还进行了准谐波近似（QHA）计算，显示与测量值有很好的一致性。热容量的实验结果以及其他热力学性质和相平衡是二元和三元系统的关键信息，特别是对于CALPHAD类型的评估。因此，将结果与最近评估中使用的Kopp-Neumann近似进行了比较，结果表明，两种化合物的参数都可以在当前的CALPHAD数据库中得到改进

  DOI：

  10.1016/j.jallcom.2021.160411

文献信息

• Heat capacity measurements of the Fe2Nb and Fe7Nb6 intermetallic compounds
  作者：Antonio A.A.P. Silva、Marcela S. Lamoglia、Gilbert Silva、Jean-Marc Fiorani、Nicolas David、Michel Vilasi、Gilberto C. Coelho、Carlos A. Nunes、Luiz T.F. Eleno

  DOI：10.1016/j.jallcom.2021.160411

  日期：2021.10

  The molar heat capacities of the Fe2Nb and Fe7Nb6 intermetallic compounds are reported here for the first time. The results were obtained via Differential Scanning Calorimetry (DSC) measurements, performed in a temperature range between 348 and 1038 K. The alloys were prepared by arc-melting high purity metals under argon flux and later heat-treated at 1200 ∘C for 336 h encapsulated in quartz tubes

  本文首次报道了Fe 2 Nb和Fe 7 Nb 6金属间化合物的摩尔热容。348和K之间1038合金是用电弧熔化高纯度金属在氩气下通量和后热处理在1200制备的结果通过差示扫描量热法（DSC）测量，在温度范围内进行获得 ∘下336ħ密封在氩气下的石英管中，以确保热力学平衡。然后使用X射线衍射（XRD）和扫描电子显微镜（SEM）对所得样品进行表征。使用20和50 K步的交替步法进行热容量DSC测量，得到的C p与每个温度间隔的中点相关联。由于数据中的分散，采用了简化的C p（T）曲线的拟合。还进行了准谐波近似（QHA）计算，显示与测量值有很好的一致性。热容量的实验结果以及其他热力学性质和相平衡是二元和三元系统的关键信息，特别是对于CALPHAD类型的评估。因此，将结果与最近评估中使用的Kopp-Neumann近似进行了比较，结果表明，两种化合物的参数都可以在当前的CALPHAD数据库中得到改进
• NMR Study of (Zr_1-<i>x</i>Nb_<i>x</i>) Fe₂
  作者：Yoshihiro Yamada、Kyozo Ôhira

  DOI：10.1143/jpsj.52.3646

  日期：1983.10

  Nuclear magnetic resonance has been investigated on the Laves phase compound (Zr 1- x Nb x ) Fe 2 at liquid helium temperature. In the C-15 type ferromagnetic region where Fe moments are almost constant (1.6 µ B /Fe for x <0.3), the change in zero-field spin-echo spectra of 57 Fe, 93 Nb and 91 Zr can be attributed to a change in the coupling constant between the internal field and the neighboring Fe

  已经在液氦温度下对 Laves 相化合物 (Zr 1- x Nb x ) Fe 2 进行了核磁共振研究。在 Fe 矩几乎恒定的 C-15 型铁磁区（x <0.3 时为 1.6 µ B / Fe），57 Fe、93 Nb 和 91 Zr 的零场自旋回波谱的变化可归因于内部场与相邻 Fe 矩之间耦合常数的变化。对于 C-14 型反铁磁化合物 (0.4≤ x ≤0.7)，观察到 93 Nb 的宽自旋回波谱，表明 Fe 矩的大小分布很广。对于更多富含 Nb 的化合物 (0.85≤ x ≤0.95)，外场光谱显示小的负内场 (∼3 kOe)，表明这些化合物具有弱铁磁性。在 x = 0.8 处，光谱表明铁磁性和反铁磁性共存。
• Magnetic moments and x-ray photoelectron spectroscopy splittings in Fe<i>3s</i>core levels of materials containing Fe
  作者：J. F. van Acker、Z. M. Stadnik、J. C. Fuggle、H. J. W. M. Hoekstra、K. H. J. Buschow、G. Stroink

  DOI：10.1103/physrevb.37.6827

  日期：——
• The 57Fe Mössbauer isomer shift in intermetallic compounds of iron
  作者：A.M. Van der Kraan、K.H.J. Buschow

  DOI：10.1016/0378-4363(86)90492-4

  日期：1986.3
• Experimental investigation of phase equilibria in the Fe–Nb–Si ternary system
  作者：Dong Wang、Shuiyuan Yang、Mujin Yang、Jianping Zheng、Hongfa Hu、Xingjun Liu、Cuiping Wang

  DOI：10.1016/j.jallcom.2014.03.167

  日期：2014.8

  The phase equilibria of the Fe-Nb-Si ternary system were investigated by electron probe microanalyzer (EPMA), back scattered electron (BSE), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) on the equilibrated alloys. In this study, three isothermal sections of the Fe-Nb-Si ternary system at 1200 degrees C, 1100 degrees C and 1000 degrees C were respectively determined and six ternary compounds were confirmed. The obtained experimental results show that there are large solubilities of Si in the epsilon NbFe2 and mu FeNb phases. The newly determined phase equilibria of the Fe-Nb-Si system will provide useful information for silicon steels development. (C) 2014 Elsevier B.V. All rights reserved.