Non-contact method to reduce contact problems between sample and electrode in dielectric measurements
Artikel i vetenskaplig tidskrift, 2020

Dielectric response measurement is a widely used technique for characterising dielectric materials in terms of their capacitance and dielectric loss. However, the widely used approach with contact between samples and electrodes can in some cases limit the accuracy of the measurement. The authors introduce an easily realised electrode arrangement for non-contact measurements, which avoids these contact problems. The performance of the electrode arrangement in terms of the edge effect is assessed. The non-contact and contact methods are compared based on error-sensitivity analysis and experimental results. Differences are studied further, with attention to contact pressure. The non-contact method is also compared experimentally with the one-sided non-contact method. Air-reference measurements, comparing the sample to an air-gap for improved calibration, are used for all measurements. The results show that the non-contact method can be an alternative to reduce contact problems between the sample and electrodes, although error sensitivity can be higher when the non-contact method is used. The non- contact method can decrease the influence of the pressure applied to the sample compared to the contact method, and can also reduce the problem of poor contact that can arise from the absence of pressure in the one-sided non-contact method.

Dielectric response measurement

non-contact method

Författare

Jing Hao

Kungliga Tekniska Högskolan (KTH)

Xiangdong Xu

Chalmers, Elektroteknik, Elkraftteknik, Elnät och komponenter

Nathaniel Taylor

Kungliga Tekniska Högskolan (KTH)

High voltage

2397-7264 (eISSN)

Ämneskategorier

Materialteknik

Elektroteknik och elektronik

Styrkeområden

Energi

Materialvetenskap

Fundament

Grundläggande vetenskaper

DOI

10.1049/hve.2019.0334

Relaterade dataset

URI: https://digital-library.theiet.org/docserver/fulltext/10.1049/hve.2019.0334/HVE.2019.0334.pdf?expires=1603703501&id=id&accname=guest&checksum=723C4C186D0BBD336807A9A4C33C149B

Mer information

Senast uppdaterat

2020-10-26