在LaSrCoRuO的拓化学还原过程中,阳离子缺氧氧化物和氧化相之间的竞争6
Zhilin Liang1, Maria Batuk2, Fabio Orlandi3
1Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, U.K.
Inorganic chemistry
|June 28, 2024
概括
二元金属化物使复杂氧化物中新型氧化化物相的低温合成成为可能. 控制的部分压力是形成氧化或氧化物的关键,影响磁性.
科学领域:
- 固态化学 固态化学
- 材料科学是一种材料科学.
- 无机合成 无机合成
背景情况:
- 二元金属化物是复杂氧化物的有效低温还原剂.
- 对先进材料来说,合成缺乏离子的氧化物或氧化水合物相对于先进材料来说至关重要.
研究的目的:
- 用二元金属化物研究新型氧化化物相的合成.
- 探索反应条件,特别是的部分压力对产品形成的影响.
- 为了描述合成材料的磁性特性.
主要方法:
- 使用化 (CaH2) 和化 (LiH) 与LaSrCoRuO6.6进行固态反应.
- 在密封的管道和在流动的气氛下进行的反应.
- 使用X射线衍射和磁化测量的产品的表征.
主要成果:
- 面中心立方体LaSrCoRuO3.2H1.9与CaH2.2的合成.
- 在密封管中形成四角形LaSrCoRuO4.8H1.2和立方LaSrCoRuO3.3H2.13与LiH的形成.
- 由于较低的部分压力,在流动的气下,用LiH产生全氧化物相 (LaSrCoRuO5和LaSrCoRuO4).
- 氧化的形成直接从原始氧化物中进行,没有缺少阳离子的中间体.
- 合成的LaSrCoRuOxH<0xE1><0xB5><0xA7>相表现出反铁磁合,而LaSrCoRuO4显示出350K以上的铁磁行为.
结论:
- 复杂氧化物转化为氧化或氧化物的拓化学转化可通过部分压控制.
- 氧化的直接形成途径绕过了缺阳离子的氧化物中间体.
- 氧化和氧化物相的独特磁性行为与它们的组成和电子结构有关.
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