高压合成和局部结构的冠状体类型的In{\displaystyle In}2-2x) Zn{\displaystyle Zn}x) Sn{\displaystyle Sn}x) O{\displaystyle O}3) (x ≤ 0.7) 的高压合成和局部结构
Cathleen A Hoel1, José Manuel Gallardo Amores, Emilio Morán
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.
Journal of the American Chemical Society
|November 3, 2010
概括
研究人员在高压下合成了一种新的冠状体类型的氧化 (cor-ZITO). 这种透明的导电氧化物表现出独特的结构和极性质,与其已知的多态体不同.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 透明导电氧化物 (TCO) 对电子设备至关重要.
- 高压合成提供了一条通往新型氧化物多态的途径.
- 基于的TCO被广泛研究,但其结构多样性有限.
研究的目的:
- 为了合成和描述In(2-2x) Zn ((x) Sn ((x) O ((3) 的冠状体型多态体.
- 为了研究高压阶段的结构和粘合特性.
- 为了探索合成材料的潜在极性.
主要方法:
- 高压和高温合成 (70 kbar, 1000 °C).
- 扩展的X射线吸收细结构 (EXAFS) 分析.
- 粉末X射线衍射 (PXRD). 粉末X射线衍射.
- 测量第二波 (SHG) 测量.
主要成果:
- 在x = 0.7.7之前成功合成了金刚石类型的In{2-2x}Zn{x}Sn{x}O{3) (cor-ZITO).
- EXAFS揭示了Zn和Sn八面体的显著面部共享与移位的阴离子.
- PXRD显示了单元细胞收缩,没有ilmenite类型的排序.
- 测量SHG表明一个极性LiNbO(3) 类型的排列.
结论:
- 铜型ZITO是一种已知TCO的稳定高压多态.
- 结构偏离理想的玉合金,具有位移的离子和特定的结合.
- 该材料具有极性特征,为非线性光学应用开辟了道路.
相关概念视频
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