用于冷场排放应用的点电容器的制造和电气特性
Ammar Alsoud1,2, Adel A Shaheen3, Alexandr Knápek4,5
1Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, Brno 61200, Czech Republic.
ACS omega
|March 31, 2025
概括
这项研究揭示了环氧涂层微尖发射器作为点电容器起作用. 分析了它们的介电性质,包括电容和导电性,显示了温度依赖的行为,并促进了电子传输.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 电气工程 电气工程
背景情况:
- 复合冷场排放发射器对于各种电子应用至关重要.
- 了解它们的介电性质对于优化性能至关重要.
- 环氧树脂涂层正在研究它们在发射器行为中的作用.
研究的目的:
- 为了研究由环氧涂层微型组成的点电容器的介电性质.
- 分析温度和环氧层厚度对电气特性的影响.
- 为了阐明环氧层内的电子传输和导电机制.
主要方法:
- 使用电化学蚀刻和环氧涂层制造微型片.
- 使用扫描电子显微镜-能量分散式X射线光谱学 (SEM-EDS) 的表征.
- 阻抗光谱分析跨越温度范围 (30-90°C) 和频率范围 (1-10^6Hz).
主要成果:
- 复合发射器表现出点电容器行为.
- 阻抗和电容性随着温度的增加而下降;交流电导率保持不变.
- 激活和跳跃能量随着环氧体厚度的增加而减少,从而促进电子运输.
- 尼奎斯特图表显示电容降低和温度放松时间增加,表明导电路的形成.
结论:
- 该研究提供了对复合发射器的介电性质和电容的见解.
- 修改后的跳跃模型解释了通过环氧层传导机制.
- 这些发现有助于理解这种结构中导电通路的形成.
相关概念视频
MOS Capacitor
631
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
631
Capacitor With A Dielectric
3.8K
Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
3.8K
Capacitors
384
Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
384
Spherical and Cylindrical Capacitor
5.4K
A spherical capacitor consists of two concentric conducting spherical shells of radii R1 (inner shell) and R2 (outer shell). The shells have equal and opposite charges of +Q and −Q, respectively. For an isolated conducting spherical capacitor, the radius of the outer shell can be considered to be infinite.
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of...
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of...
5.4K


