Aluminium--silver (1/2) | 12249-71-7

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物
• 英文名称: Aluminium--silver (1/2)
• 英文别名: alumane;silver
• CAS: 12249-71-7
• 化学式: Ag₂Al
• 分子量: 242.718
• InChiKey: QTLVXRYSCBFOQQ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -1.19
• 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

• 作为产物：
  描述：

  在 NaOH 作用下， 以 sodium hydroxide 为溶剂， 生成 Aluminium--silver (1/2)
  参考文献：
  名称：

  Synthesis of skeletal silver from rapidly solidified Al–Ag precursor

  摘要：

  Skeletal silver was synthesized by applying an alkaline leaching process to rapidly solidified Al-Ag granular precursors. The structure of the leached materials was examined by scanning electron microscopy, EPMA, X-ray diffraction and differential scanning calorimetry. Most of the aluminum was leached out and only a few percent aluminum remained in the as-leached state. The crystallographic structure of the leached material was face centered cubic and it was formed by rearrangement of silver atoms dissolved in the alpha-Al solid solution during leaching. The Ag2Al phase was too stable for the alkaline solution so that it did not contribute to the formation of skeletal silver. The formation ratio of skeletal silver to the total silver in the precursor depended on the amount of dissolved silver in the alpha phase. Rapid solidification of Al-Ag alloys was quite effective for obtaining the super-saturated a phase. More than 80% of the silver in the precursor 2 turned into skeletal silver using the rapidly solidified precursor. The specific surface area of the skeletal silver was about 9 m(2)/g. The mean diameter of the skeletal silver was about 20 nm as derived using the X-ray line broadening method. This value was 1.2-1.5 times smaller than that evaluated from the specific surface area assuming spherical silver particles. The difference may result from shape degeneration. (C) 2002 Elsevier Science B.V. All rights reserved.

  DOI：

  10.1016/s0925-8388(02)00798-3

文献信息

• Structure analysis of precursor alloy and diffusion during dealloying of Ag–Al alloy
  作者：Runwei Zhang、Xu Wang、Zhichao Zhang、Jacob C. Huang、Feng Shi、Ming Wu

  DOI：10.1039/c7ra12915g

  日期：——

  Nanoporous silver (NPS) was fabricated by dealloying Ag–Al alloy ribbons with nominal compositions of 30, 35 and 40 at% Ag (corresponding to hypoeutectic composition, eutectic composition and hypereutectic composition, respectively). The microstructures of the Ag–Al precursor and as-dealloyed samples were observed using a scanning electron microscope (SEM) and a transmission electron microscope (TEM)

  纳米多孔银 (NPS) 是通过将标称成分为 30、35 和 40 at% Ag（分别对应于亚共晶成分、共晶成分和过共晶成分）的 Ag-Al 合金带脱合金制成的。使用扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 以及聚焦离子束 (FIB) 技术观察 Ag-Al 前体和脱合金样品的微观结构。我们得出结论，随着 Ag 含量从 30 at% 增加到 40 at%，韧带的直径从 70 ± 15 nm 增加到 115 ± 35 nm。由于结晶凝固的方法和 α-Al(Ag) 和 γ-Ag 2 Al 相的分布，脱合金态的 Ag 35 Al 65合金表现出均匀的韧带/孔结构，而Ag 30 Al 70和Ag 40 Al 60的微观结构分别显示出更薄和更粗的韧带结构。
• Calorimetric and other studies of intermetallic phase formation in Ag/Al bilayer thin films
  作者：R. Roy、S. K. Sen

  DOI：10.1007/bf01133756

  日期：——

  Silver and aluminium bimetallic thin film couples have been studied using constant heating rate differential scanning calorimetry both on cleaned glass substrates and freshly cleaved NaCl crystals. The most striking feature was the occurrence of two maxima in the reaction rate during the formation of a single product phase, Ag2Al, suggesting a two-step growth process. The activation energy for this reaction was 0.98 eV in the first step and 0.93 eV in the second step. These values are in good agreement with values obtained by a different technique, i.e. Rutherford back-scattering. Transmission electron microscopy, thin film X-ray diffraction, the change in resistance of bilayer films with temperature and thermodynamic and kinetic analyses have been used to investigate the intermetallic phase formation. It was observed that substrate plays an important role in the kinetics of thin-film reaction.