研究修改PTFE在高温下的电绝缘性能
Lijian Yuan1,2, Xu Zheng3, Wenbo Zhu4
1School of Electrical and Electronic Engineering, Shandong University of Technology, Zibo 255000, China.
Polymers
|February 10, 2024
概括
用喷二氧化 (TiO2) 修改聚四乙烯 (PTFE) 提高了其电绝缘. 这种TiO2涂层显著抑制了部分放电,并提高了航空电缆的高温性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 航空航天工程 航空航天工程
背景情况:
- 聚四乙烯 (PTFE) 对于隔热航空电缆至关重要,但在高温和电场下降解.
- 在PTFE中,部分放电和表面闪电对飞机安全构成重大风险.
研究的目的:
- 研究磁铁喷射二氧化 (TiO2) 对PTFE电绝缘性能的影响.
- 为了分析改性PTFE的高温 (20-200°C) 电气特性和老化.
主要方法:
- 用磁铁喷TiO2为不同时间制备的改性PTFE.
- 研究了直流 (DC) 表面放电,表面闪电和在高温下发生的电老化.
- 分析了影响绝缘性能的机制.
主要成果:
- 表面放电强度随着温度的增加而增加.
- TiO2喷显著抑制了 PTFE 中的部分放电.
- 闪光电压最初增加,然后随着喷雾时间的增加而减少.
- 经过修改的PTFE显示了表面潜在衰变率的增加和浅陷能量密度.
结论:
- 磁铁喷射TiO2有效地增强了PTFE表面的电绝缘和抗衰老性能.
- 修改抑制电荷积累和部分放电,提高高温航空应用的安全性.
更多相关视频
07:44Characterization of Full Set Material Constants and Their Temperature Dependence for Piezoelectric Materials Using Resonant Ultrasound Spectroscopy
Published on: April 27, 2016
9.5K
10:40A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.2K
相关概念视频
Thermal expansion and Thermal stress: Problem Solving
1.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.2K
pV-Diagrams
4.1K
The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
4.1K
