barium boride

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 各种混合金属/非金属
• 英文名称: barium boride
• 英文别名: barium hexaboride；bariumhexaboride；Bariumhexaborid；barium dihydride;borane
• 化学式: B₆Ba
• 分子量: 202.196
• InChiKey: WXDQSADZHQOVJG-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -8.02
• 重原子数：
  7.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为反应物：
  描述：

  甲烷 、 barium boride 以 solid 为溶剂， 生成 Ba-graphite intercalation compd.
  参考文献：
  名称：

  Darstellung, Isolierung und Charakterisierung von Ba@C74

  摘要：

  For the first time Ba@C-74 has been isolated in pure form. The title compound has been isolated from a raw material, produced in a radio-frequency-furnace, consisting of a mixture of fullerenes and endohedral Bariumfullerenes. Ba@C-74 was separated by two stage sublimation and subsequent high-performance liquid chromatography (HPLC) using a Buckyprep column. The capacity factor for Ba@C-74 is 6.0. Its endohedral character has been deduced from the fragmentation pattern obtained by time-of-night mass spectroscopy while the composition has been confirmed by comparison of calculated and measured isotopic pattern of the parent peak. Further characterization was performed by VIS/NIR-spectroscopy and electron-paramagnetic-resonance spectroscopy (EPR).

  DOI：

  10.1002/1521-3749(200101)627:1<23::aid-zaac23>3.3.co;2-b
• 作为产物：
  描述：

  氢化铝 在 barium borate 、 coal 作用下， 生成 barium boride
  参考文献：
  名称：

  Moissan; Williams, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1897, vol. 125, p. 629

  摘要：

  DOI：

文献信息

• Single-step low-temperature synthesis routes for (Ba, Ce, Gd) hexaborides and their thermionic emission properties
  作者：Muhammad M. Hasan、Erich Kisi、Heber Sugo

  DOI：10.1016/j.jallcom.2022.165474

  日期：2022.9

  high chemical stability and low work function have recently attracted much interest as promising thermionic cathodes. Their synthesis at low temperatures without post-synthesis purification treatments is still a significant challenge. The present work demonstrates a simple synthesis technique to produce pure barium, cerium and gadolinium hexaborides (BaB6, CeB6, and GdB6). For each hexaboride, a batch

  具有高化学稳定性和低功函数的稀土/碱土六硼化物最近作为有前途的热离子阴极引起了极大的兴趣。它们在没有合成后纯化处理的低温下合成仍然是一个重大挑战。本工作展示了一种简单的合成技术来生产纯钡、铈和钆六硼化物（BaB 6、CeB 6和 GdB 6）。对于每种六硼化物，首先研磨高纯度的前体粉末，然后在低真空炉中以不同的温度烧制，从而产生一批样品。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和电子色散光谱 (EDS) 对合成的产物进行表征。使用肖特基器件研究了它们的热离子特性。在较低温度（≤1400°C）下成功合成了纯BaB 6、CeB 6和GdB 6 。发现纳米晶 CeB 6在 1200 °C 的最低温度下生产。纯 CeB 6和 GdB 6的平均粒径除了大的 BaB 6颗粒外，合成的颗粒在亚微米范围内。BaB 6、CeB 6和GdB 6阴极的估计功函数分别为1.61 ± 0.18 eV、2
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: B: MVol., 4.4, page 31 - 35
  作者：

  DOI：——

  日期：——
• ——
  作者：L. G. Sevast'yanova、P. E. Kazin、O. V. Kravchenko、S. A. Kuz'michev、Ya. G. Ponomarev、K. P. Burdina、B. M. Bulychev

  DOI：10.1023/a:1026163230359

  日期：——

  Dense samples of pure magnesium boride and of the compositions Mg((1-x))A(x)B(2) (A = Na, K, Ca, Sr, Ba, Sn, Ti; 0.05 < x < 0.15) were prepared by sintering and using high temperature-high pressure treatment. The lattice parameters of most of the doped MgB2 samples vary only slightly as compared to those of the pure MgB2 irrespective of the sample preparation procedure, high temperature-high pressure treatment conditions, and the amount of dopant, thus indicating the absence of extended solid solution regions. The superconducting transition temperatures of all the samples did not exceed the value characteristic of MgB2 (39 +/- 1 K). The results obtained for the dense MgB2 samples using the Andreev reflection and tunneling spectroscopies confirm the two-gap nature of superconductivity in magnesium diboride and point to analogy between the superconductivity mechanisms in this compound and in cuprates.
• DE157615
  申请人：——

  公开号：——

  公开（公告）日：——
• Gmelin Handbuch der Anorganischen Chemie, Gmelin Handbook: Ba: MVol., 12.1, page 295 - 299
  作者：

  DOI：——

  日期：——