Influence of Water Absorption on Space Charge Characteristics in Epoxy/Boron Nitride Composite

Murakami, Yoshinobu; Kato, Hiroi; Kawashima, T.; Nagao, Masayuki; Hozumi, Naohiro; Ishikawa, Motomi; Wakimoto, Toru

doi:10.1541/ieejfms.138.394

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2020

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“…Acoustic methods have contributed significantly to the measurement of space charge inside an insulator. In particular, the pulsed electrostatic method (PEA method) 5–8 has been widely adopted to measure the space charge distribution in polymer insulation materials. The PEA method uses a simple measuring system and delivers high spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

PEA measurement of low‐density polyethylene using spin‐coated P(VDF‐TrFE) film and acoustic propagation analysis based on viscoelasticity

Ozaki

Sanada

Ochi

et al. 2020

Elect Comm in Japan

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Pulsed electroacoustic (PEA) space charge measurement of low‐density polyethylene using a spin‐coated poly(vinylidene fluoride‐trifluoroethylene) thin film is demonstrated. The space charge profile of a low‐density polyethylene film with a thickness of 150 μm is measured by PEA method. Compared with conventional 9 and 30‐μm piezoelectric films, the space charge profile obtained by the 3‐μm spin‐coated film shows better spatial resolution. Furthermore, acoustic attenuation of a PEA signal is also analytically studied using the Kelvin‐Voigt model for viscoelastic materials.

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Section: Introductionmentioning

confidence: 99%