相关实验视频
Updated: Jul 13, 2025

12:59
A System to Create Stable Nanoparticle Aerosols from Nanopowders
Published on: July 26, 2016
9.6K
揭示了使用陶氧化物核心外颗粒粉末气溶沉积方法的沉积机制
Mario Linz1,2, Florian Bühner3, Daniel Paulus1,2
1Department of Functional Materials, University of Bayreuth, Universitätsstraße 30, 95447, Bayreuth, Germany.
Advanced materials (Deerfield Beach, Fla.)
|October 14, 2023
概括
粉末气溶沉积方法破碎颗粒,仅沉积外元素,在室温下形成陶膜. 这揭示了对先进材料沉积机制的关键见解.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 陶工程 陶工程
背景情况:
- 粉末气溶沉积 (PAD) 是一种室温陶薄膜制造技术.
- 尽管进行了广泛的研究,但PAD的精确沉积机制仍然不完全理解.
- 核心外粒子为研究PAD机制提供了一种新的方法.
研究的目的:
- 为了阐明粉末气溶沉积中的粒子动态和沉积机制.
- 用核心陶颗粒分析PAD期间元素组成的变化.
- 在沉积的薄膜中可视化元素分布,以了解粒子行为.
主要方法:
- 使用核心外颗粒 (Al2O3-SiO2和LiNi0.6Mn0.2Co0.2O2-LiNbO3) 进行沉积研究.
- 使用能量分散式X射线光谱 (EDX) 来确定粉末和薄膜中的元素比率.
- 应用扫描传输电子显微镜 (STEM) 使用EDX和能量选择性反散射电子 (EsB) 探测器进行横截面分析.
主要成果:
- 元素分析显示,沉积后,外元素发生了显著的转变,这表明粒子断裂.
- STEM-EDX分析证实,只有破碎颗粒的外部部分被沉积.
- 该研究观察到与基板或现有薄膜层相撞时的粒子碎片化.
结论:
- 粉末气溶沉积机制涉及撞击时的颗粒断裂.
- 只有撞击颗粒的外材料才有助于沉积的陶薄膜.
- 这项研究提供了对PAD的基本过程的更清晰的理解.
相关概念视频
Precipitate Formation and Particle Size Control
793
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
793
Electrodeposition
648
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
648

