Short-term dielectric performance assessment of BOPP capacitor films: A baseline study

Rytöluoto, Ilkka; Ritamäki, Mikael

doi:10.1109/icpadm.2018.8401266

Cited by 13 publications

(18 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3 along with a commercial capacitor BOPP reference from [15]. The measured εr values were generally within the expected range for BOPP [15,16], showing a slightly decreasing trend with increasing temperature from -60 °C to 125 °C. Although small differences in εr were noticed between the studied materials, it is currently challenging to assess the role of silica alone, as such variations could also be attributed to film voids [3] and/or thickness measurement inaccuracy [17].…”

Section: Permittivity and Dielectric Lossmentioning

confidence: 53%

“…Relative permittivity and dielectric loss characteristics of the biaxially stretched films as a function of temperature are presented in Fig. 3 along with a commercial capacitor BOPP reference from [15]. The measured εr values were generally within the expected range for BOPP [15,16], showing a slightly decreasing trend with increasing temperature from -60 °C to 125 °C.…”

Section: Permittivity and Dielectric Lossmentioning

confidence: 80%

“…With increasing silica content, the dielectric loss spectra (tan δ = εr ' /εr) showed (i) a slight increase of tan δ below the glass transition temperature Tg (approx. −5 °C [15]), (ii) appearance of a new peak at ~65 °C and (iii) reduction of dielectric loss at high temperatures. For the unfilled BOPP, the increase in tan δ at high temperature is likely related to the release of trapped charge and increase of DC conductivity (the effect was much pronounced at low frequencies).…”

Section: Permittivity and Dielectric Lossmentioning

confidence: 99%

“…Fig. 4 presents the TSDC spectra of selected compounds along with a commercial capacitor BOPP film from [15]. Based on the modified TSC theory, a numerical method proposed in [18] was used for direct determination of trap level vs. density distributions from the TSDC spectra, the results of which are exemplified in the inset of Fig.…”

Section: Permittivity and Dielectric Lossmentioning

confidence: 99%

“…For the silica compounds however, the TSC spectra above Tg became more pronounced and complex, indicating higher presence of shallow traps with trap depths in the 0.75-0.9 eV range in comparison to neat BOPP. In the high temperature region (~90 °C and above), the unfilled BOPP films exhibited strong TSC peaks corresponding to charges released from deep traps (around 1.08-1.1 eV), often being anomalous in the sense that the current flow was in the same direction as the polarization current which is indicative of space charge and electrode effects [15,19]. For the silica-BOPP films however, the TSC in the deep trap region was greatly reduced, indicating that silica can effectively suppress deep traps.…”

Section: Permittivity and Dielectric Lossmentioning

confidence: 99%

See 4 more Smart Citations

Compounding, Structure and Dielectric Properties of Silica-BOPP Nanocomposite Films

Rytöluoto

Ritamäki

Paajanen

et al. 2018

2018 IEEE 2nd International Conference on Dielectrics (ICD)

View full text Add to dashboard Cite

This study presents preliminary results on the morphology, structure and dielectric properties of laboratory scale cast and biaxially oriented silica-PP films, currently being developed in the European project GRIDABLE. Space charge measurements on the thick cast films indicated a reduction of positive space charge and faster depolarization characteristics upon inclusion of nano-silica, being indicative of reduction of trap depth and density distribution in comparison to neat PP. Likewise, for the biaxially oriented silica-PP thin films, increased amount of shallow traps and a reduction of concentration of traps in the deep trap range (~1 eV) were observed. Nano-silica was also found to reduce the dielectric loss at high temperatures in the frequency range appropriate to use. Such dielectric property modifications can potentially lead to benefits for insulation reliability and lifetime, especially at higher temperatures. A two-step compounding via a master batch approach was also found to be a viable option for the up-scaling of nanocomposite production.

show abstract

Section: Permittivity and Dielectric Lossmentioning

confidence: 53%

Section: Permittivity and Dielectric Lossmentioning

confidence: 80%

Section: Permittivity and Dielectric Lossmentioning

confidence: 99%

Section: Permittivity and Dielectric Lossmentioning

confidence: 99%

Section: Permittivity and Dielectric Lossmentioning

confidence: 99%

See 3 more Smart Citations

Compounding, Structure and Dielectric Properties of Silica-BOPP Nanocomposite Films

Rytöluoto

Ritamäki

Paajanen

et al. 2018

2018 IEEE 2nd International Conference on Dielectrics (ICD)

View full text Add to dashboard Cite

show abstract

Improving the Energy Storage Performance of a Chlorinated Poly(vinyl chloride) Film at Elevated Electric Field and Temperature via a Simple Annealing Process

Zhu

Tan

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

High energy density and efficiency are crucial factors for polymeric dielectrics to satisfy the emerging demand in high-pulse metallized film capacitors. However, achieving high energy density in polar polymeric dielectrics is usually accompanied by a sharp decline in the energy discharge efficiency at elevated electric fields and temperatures. In this work, we investigated the dielectric and energy storage properties of chlorinated poly(vinyl chloride) (CPVC) with moderate polarity. Due to the random distribution of chlorine atoms on the polymer chain, CPVC displays a medium permittivity of about 3 and low loss. Moreover, high-temperature annealing is used to promote the rearrangement of CPVC chain segments, which contributes to the formation of CPVC microcrystals. Consequently, the storage modulus and glass transition temperature (T g) along with the thermal stability of CPVC are improved due to the microcrystals as physical cross-linking points. Compared to pristine CPVC, heat-treated CPVC shows reduced dielectric loss and elevated breakdown strength. As a result, a high energy density of 9.4 J/cm3 and a discharge efficiency of 82.7% at 625 MV/m are obtained in heat-treated CPVC. This work offers a straightforward approach to improving the energy storage properties of CPVC so that it can be used for high-pulse metallized film capacitors.

show abstract

Biaxially oriented silica–polypropylene nanocomposites for HVDC film capacitors: morphology-dielectric property relationships, and critical evaluation of the current progress and limitations

et al. 2022

View full text Add to dashboard Cite

show abstract

Short-term dielectric performance assessment of BOPP capacitor films: A baseline study

Cited by 13 publications

References 16 publications

Compounding, Structure and Dielectric Properties of Silica-BOPP Nanocomposite Films

Compounding, Structure and Dielectric Properties of Silica-BOPP Nanocomposite Films

Improving the Energy Storage Performance of a Chlorinated Poly(vinyl chloride) Film at Elevated Electric Field and Temperature via a Simple Annealing Process

Biaxially oriented silica–polypropylene nanocomposites for HVDC film capacitors: morphology-dielectric property relationships, and critical evaluation of the current progress and limitations

Contact Info

Product

Resources

About