相关实验视频

Updated: Jul 18, 2026

Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition

Preparation of Macroporous Epitaxial Quartz Films on Silicon by Chemical Solution Deposition

Published on: December 21, 2015

电子沉积的陶单晶

Switzer¹, Shumsky, Bohannan

¹University of Missouri-Rolla, Department of Chemistry and Graduate Center for Materials Research, Rolla, MO 65409-1170, USA.

Science (New York, N.Y.)

|April 9, 1999

概括

研究人员开发了一种方法,在室温下制造稳定的单晶立方氧化膜. 这一突破使其高氧化离子流动性的使用在先进的燃料电池和传感器中成为可能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
固态化学固态化学

背景情况:

单晶薄膜对于利用固有的材料特性至关重要,避免了颗粒边界的限制.
立方 bismuth 氧化物表现出已知最高的氧化物离子流动性,使其成为燃料电池和传感器的前景.
氧化的高温立方相通常只有在729和825摄氏度之间稳定,并且在室温下没有观察到.

研究的目的:

在室温下合成高温氧化物立方多态的单晶薄膜.
研究一种新的方法来产生材料的非平衡相.

主要方法:

从水溶液中获得的长轴电沉积.
使用单晶金基板.
通过形成巧合格子来适应格子不匹配.

主要成果:

在室温下成功合成立方 bismuth 氧化物的单晶薄膜.
通过与金基板相对旋转氧化膜,证明了适应35.4%的格子不匹配.
建立了一种在不平衡阶段生产材料的方法.

结论:

来自水溶液的环轴电沉积是一种可行的技术,用于创建转移稳定的晶体相.
这种方法允许在室温下稳定高流动性立方氧化物.
开发的方法可以应用于合成其他无法通过传统热处理获得的不平衡相.

更多相关视频

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Published on: October 16, 2017

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Epitaxial Nanostructured α-Quartz Films on Silicon: From the Material to New Devices

Published on: October 6, 2020

相关概念视频

Ionic Crystal Structures

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...

Imperfections in Crystal Structure: Stoichiometric Point Defects

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...