Study on the Electrical Insulation Properties of Modified PTFE at High Temperatures

Yuan, Lijian; Zheng, Xu; Zhu, Wenbo; Wang, Bin; Chen, Yuanyuan; Xing, Yunqi

doi:10.3390/polym16030316

Cited by 2 publications

(1 citation statement)

References 20 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, throughout this work we will refer to the sample as PTFE and to the spacer as Teflon. The spacers were chosen of Teflon due to its very low electrical conductivity [11] and negligible leakage currents when it is placed directly on a metallic electrode [12]. PTFE and Kapton were chosen considering their importance in space applications.…”

Section: Sample Design and Characterizationmentioning

confidence: 99%

Secondary electron emission yield in thick dielectric materials: a comparison between Kelvin probe and capacitive methods

Mata,

Cros,

Gimeno

et al. 2024

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The recent high demand of secondary electron emission yield (SEY) measurements in dielectric materials from space industry has driven SEY laboratories to improve their facilities and measurement techniques. SEY determination by the common capacitive method, also known as pulsed method, is well accepted and has given satisfactory results in most cases. Nevertheless, the samples under study must be prepared according to the experimental limitations of the technique, i.e., they should be manufactured separated from the devices representing faithfully the surface state of the own device and be as thin as possible. A method based on the Kelvin Probe (KP) is proposed here to obtain the SEY characteristics of electrically floating Platinum, Kapton and Teflon placed over dielectric spacers with thicknesses ranging from 1.6 to 12.1 mm. The results are compared with those of the capacitive method and indicate that KP SEY curves are less sensitive to spacer thickness. An explanation based on the literature is also given. In all, we have established that KP is better suited for the analysis of dielectric samples thicker than 3 mm. 

show abstract

Section: Sample Design and Characterizationmentioning

confidence: 99%

Secondary electron emission yield in thick dielectric materials: a comparison between Kelvin probe and capacitive methods

Mata,

Cros,

Gimeno

et al. 2024

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

Multi‐Array Tubular Microbial Fuel Cell‐Based Biosensor with Membrane Electrode Assembled Air‐Cathodes

Yeo,

Ang,

Bakar

et al. 2024

Fuel Cells

View full text Add to dashboard Cite

Using microbial fuel cells (MFCs) as biosensors ensures a sustainable method for water quality detection. However, the research on MFC‐based biosensors with a tubular setup is still scarce. In this study, a tubular multi‐array MFC‐based biosensor setup with air‐cathodes was assembled under the membrane electrode assembly configuration. Three different materials, including carbon black (CB), Pt/C (PtC), and polyaniline (PANI), were synthesized and coated on the membrane‐facing side of the air‐cathode to demonstrate the effects of modified air‐cathodes on the overall performance of the MFC‐biosensors. Unmodified carbon cloths were used as anodes. Three days of startup period were required by the biosensors before producing an electrical signal output. The highest current density was obtained by the polytetrafluoroethylene (PTFE)/CB/PtC (0.31 A m−2) sample followed by PTFE/CB/PANI (0.09 A m−2), and lastly PTFE/CB (0.05 A m−2). The control (PTFE only) sample did not generate any noticeable electrical signal. The electrochemical impedance spectroscopy analysis showed that the incorporation of PtC on the PTFE/CB sample lowered the charge transfer resistance (Rct), whereas the addition of PANI increased the Rct. Despite the differences in Rct values, both PTFE/CB/PtC and PTFE/CB/PANI samples demonstrated a better current density production than the PTFE/CB sample. Thus, modified air‐cathodes further elevated the biosensor's performance.

show abstract

Study on the Electrical Insulation Properties of Modified PTFE at High Temperatures

Cited by 2 publications

References 20 publications

Secondary electron emission yield in thick dielectric materials: a comparison between Kelvin probe and capacitive methods

Secondary electron emission yield in thick dielectric materials: a comparison between Kelvin probe and capacitive methods

Multi‐Array Tubular Microbial Fuel Cell‐Based Biosensor with Membrane Electrode Assembled Air‐Cathodes

Contact Info

Product

Resources

About