Electronic Breakdown in Polyethylene Film in Room Temperature Range

Miyauchi, Haruko; Yahagi, Kichinosuke

doi:10.1541/ieejfms1972.92.36

Cited by 13 publications

(6 citation statements)

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“…Figure (B) shows the correlation of DCBD versus spherulite size for both LDPE and LLDPE. These results show a strong correlation between DCBD and spherulite size and that DCBD values decrease significantly as spherulite sizes increase which is consistent with previous studies . Thus, the reduced spherulite sizes had a greater impact on the electrical breakdown strength than the slight reduction in % crystallinity.…”

Section: Resultssupporting

confidence: 92%

“…The β value correlates to the size distribution of defects or filler particles such that poor dispersion of the silica particles leads to lower β values . Therefore this result indicates that the dispersion of silica in the 1 wt % OTMS sample is improved compared to the 3 wt % sample . The higher breakdown strengths reported here are consistent with improved breakdown strengths documented in previous studies with silica/PE composites…”

Section: Resultssupporting

confidence: 89%

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The effect of inorganic and organic nucleating agents on the electrical breakdown strength of polyethylene

Seven

Cogen

Person

et al. 2018

J of Applied Polymer Sci

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Altering the morphology of polyethylene affects physical and electrical properties with reduced spherulite size correlating with higher electrical breakdown strength. Nucleating agents in polyethylene influence the final crystal morphology by increasing the number of spherulites and reducing spherulite size. Few studies are available that relate the nucleating activity to improved electrical breakdown strength. Although nanosilica is known to improve electrical breakdown strength of polyethylene in addition to serving as a nucleating agent, previous studies have not fully addressed the relationship between the improved breakdown strength and nucleating activity. In this article, direct current electrical breakdown strength and nucleation effects on morphology are assessed on a single set of controlled polyethylene compositions containing two types of surface treated nanosilica particles. The results are compared to composites with two types of organic nucleating agents 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol or calcium 1,2-cyclohexanedicarboxylate (CDA). CDA was the most effective organic nucleating agent and the hexamethyldisilizane treated nanosilica was the most effective inorganic nucleating agent in reducing spherulite sizes in low density polyethylene (LDPE). Reduced spherulite sizes in nucleated samples correlated with increased breakdown strength and lower conduction current compared to the neat LDPE. The LDPE sample with CDA also had the highest increase in crystallization temperature indicating stronger nucleating agent performance than the nanosilica and 1,3:2,4-bis(3,4-dimethylbenzylidene) sorbitol composite samples. The addition of these inorganic and organic nucleating agents all resulted in improvements in electrical breakdown strength. The results show that nucleation deserves more attention as a potential cause for improved breakdown strength observed with silica and organic nucleating agents. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46325.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 89%

The effect of inorganic and organic nucleating agents on the electrical breakdown strength of polyethylene

Seven

Cogen

Person

et al. 2018

J of Applied Polymer Sci

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“…It should be noted that the field magnitude due to electron acceleration appears slightly lower, compared to hole transport. The shaded area below the broken line illustrates experimentally observed breakdown properties of polymer insulators [5], which reveals saturation and maximum attainable breakdown fields at approximately 10MV/cm, towards low mobility values < 5 × 10 −3 cm 2 /V/s. From timeof-flight data, also the high field hole drift time τ crit has be estimated (not shown) from Fig.…”

Section: A Impact Ionization and Critical Fieldmentioning

confidence: 94%

“…Furthermore, the above mentioned pre-factor R Ins 0 may additionally vary with time, due to the superimposed dynamics of the impact ionization process, according to (5). Thus, in a generalized case, the insulator resistance would be given by…”

Section: Electro-thermal Instabilitymentioning

confidence: 99%

“…Due to the complexity and variety of observed breakdown events, a rather large number of theories and breakdown models have been developed over an extended period [1][2][3][4]. Recorded breakdown fields span from 1MV/cm for crystalline, to over 10MV/cm for fully amorphous material [5][6]. An extensive, critical review and analysis of present theories in solids under transient conditions has been provided in [7].…”

Section: Introductionmentioning

confidence: 99%

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Refined dielectric breakdown model for crystalline organic insulators: Electro-thermal instability coupled to interband impact ionization

Lima

Neto

Neff

et al. 2010

2010 IEEE International Power Modulator and High Voltage Conference

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A refined, substantially improved dielectric breakdown model is presented and applied to solution grown, single crystalline alkane type polymeric (n-C36H74) insulator, representing the iso-electronic analog to polyethylene. Illumination of attached electrodes allows controlled generation, injection into and transport of free charge carriers through the insulator. At sufficiently high electric fields, carrier transport is mediated by delocalized states in the conduction and valence band, respectively. At low and moderate fields, charge transport is suppressed by carrier trapping effects. Electric field induced inter-band impact ionization and generation of electron-hole pairs has been identified from these experiments as the dominant carrier multiplication and breakdown triggering mechanism. Critical field magnitudes > 1.26MV/cm have been recorded for injected electrons and > 0.8MV/cm for defect electrons. Application of the energy conservation principle, in accord with the solid state band model, allows determination of critical fields from the insulators electronic band-gap, effective mass and mobility of minority charge carriers. The related electrical breakdown feature and associated rapid dynamic temperature evolution has been explored on basis of the electro-thermal heat balance equation, following previous concepts applied to phase transitions. The non-linear differential equation has been solved numerically, using appropriate thermo-physical materials parameters, while considering the dielectric breakdown phenomenon as a singularity of the solution. Thermal and current run-away is due to strong positive electro-thermal feedback, in connection with an initial transient resistive behavior. Very small thermo-physical parameters are attributed to and explain filamentary charge transport. The temporal evolution of temperature and current in the conducting section or filament during the breakdown event exhibits a time scale up to the microsecond range. Shock wave emission is apparent, since the spatial temperature propagation exceeds the velocity of sound.

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Nanoscale Strategies to Enhance the Energy Storage Capacity of Polymeric Dielectric Capacitors: Review of Recent Advances

et al. 2021

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Electronic Breakdown in Polyethylene Film in Room Temperature Range

Cited by 13 publications

References 0 publications

The effect of inorganic and organic nucleating agents on the electrical breakdown strength of polyethylene

The effect of inorganic and organic nucleating agents on the electrical breakdown strength of polyethylene

Refined dielectric breakdown model for crystalline organic insulators: Electro-thermal instability coupled to interband impact ionization

Nanoscale Strategies to Enhance the Energy Storage Capacity of Polymeric Dielectric Capacitors: Review of Recent Advances

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