Space Charge Characteristics and Electrical Properties of Micro-Nano ZnO/LDPE Composites

Gao, Junguo; Li, Xia; Yang, Wenyu; Zhang, Xiaohong

doi:10.3390/cryst9090481

Cited by 8 publications

(13 citation statements)

References 16 publications

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“…Thus, the conductivity of the micro-ZnO composites was higher than that of pure LDPE. This was consistent with relative research in some way [ 41 ]. However, in this manuscript, the different micro- and nano-ZnO/LDPE were dealt with the conductivity test under different field strengths.…”

Section: Results and Analysis Of Macroscopic Testssupporting

confidence: 93%

The Research of Conductivity and Dielectric Properties of ZnO/LDPE Composites with Different Particles Size

Cheng

Guang

et al. 2020

Materials

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Nanocomposites exhibit a high dielectric strength, whereas microcomposites exhibit a high thermal conductivity. In this study, good insulating materials were developed on the basis of the synergetic effect of micro- and nanoparticles, which were used as inorganic fillers. With a double-melting blend, nano-ZnO/low density polyethylene (LDPE), micro-ZnO/LDPE, and micro-nano-ZnO/LDPE composites were prepared, according to the scanning electron microscope test, polarization microscope test, conductivity test, breakdown test, and dielectric spectrum test, the dielectric property of micro-nano-ZnO/LDPE was explored. The SEM test results showed that by adding a suitable proportion of ZnO particles, the inorganic particles could disperse uniformly without reuniting. The PLM test results showed that the micro- and nano-ZnO particles adding decreased the crystal size. The arrangement was regular and tight. The macroscopic results showed that the mass fraction of nanoparticles and microparticles were 3% and 2%, the samples conductivity was the lowest. The breakdown field strength of the nanocomposites increased. The breakdown field strength of nanocomposites with 1%, 3%, and 5% nanoparticle contents were 5%, 15%, and 10% higher than that of pure LDPE. The addition of inorganic particles resulted in new polarization modes: Ionic displacement polarization and interfacial polarization. The ZnO/LDPE composites exhibited a higher dielectric constant and dielectric loss factor than pure LDPE. However, with the increasing frequency, it took considerable time to attain interfacial polarization in the nanocomposite and micro-nanocomposite, thus decreasing the dielectric constant.

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Section: Results and Analysis Of Macroscopic Testssupporting

confidence: 93%

The Research of Conductivity and Dielectric Properties of ZnO/LDPE Composites with Different Particles Size

Cheng

Guang

et al. 2020

Materials

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“…Breakdown characteristic of (A) LDPE/V‐Al 2 O 3 ; [ 46 ] (B) LDPE/MgO; [ 61 ] (C) LDPE/ZnO; [ 47 ] and (D) LDPE/TiO 2 nanocomposite. [ 48 ] …”

Section: Classification Of Polymeric Insulation Cablesmentioning

confidence: 99%

A review on polymeric insulation for high‐voltage application under various stress conditions

Angalane

Kasinathan

2022

Polymer Composites

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Polymeric material draws a great attraction in the development of insulation for High Votage Direct Current (HVDC) applications. Insulation material is the deciding key factor to increase the operating voltage and to transmit the bulk power with minimized power loss. Premature breakdown, high withstanding temperature, and impacts of space charge accumulation are all issues faced by the insulation material. Material qualities such as dielectric, electrical, structural, and mechanical properties are directly affected by the issues. Therefore, this paper provides an overview of the dielectric properties of polymeric materials and their composites under various stress conditions. The stress includes AC, DC, superimpose and combined (AC and DC) stress under which the dielectric constant, dielectric losses, electrical strength, and space charge distribution of polymeric insulating materials such as low‐density polyethylene, high‐density polyethylene, cross‐linked polyethylene, polypropylene, and random copolymer (RCP), as well as their composites, are explored. Polypropylene and RCP outperform all other polymers in terms of breakdown strength and space charge suppression under various stress conditions. RCP is a developing material that also has the potential to be an effective thermoplastic insulation material in the future.

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“…Concluding remarks on space charge behavior in the multi‐dielectric system indicated NCs' future use in a multilayer thin film insulation system. Gao et al [ 33 ] studied the space charge characteristics of LDPE filled with micro and nano‐sized zinc oxide (ZnO) nanoparticles. The morphological features of the composites were examined using polarizing light microscopy (PLM).…”

Section: Electrical Characterizationmentioning

confidence: 99%

Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

Pandey

Singh

2021

SPE Polymers

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Polymeric materials enjoy widespread acceptance among electrical insulation design engineers due to their multi‐functional attributes (e.g., excellent dielectric properties, high strength to weight ratio, and ease of molding). However, charge accumulation at the high DC field, poor discharge resistance, low thermal conductivity, limited‐service temperature range, and inadequate stiffness have proven to be severe obstructions to far‐reaching utilization of these materials. To ensure the reliability of today's electrical power systems, novel dielectric materials with enhanced functionalities are essential. An idea that originated under the name of polymer nanocomposites (PNCs) is supposed to provide a viable solution to the challenges mentioned earlier. PNCs are made by mixing a small quantity of nanometer‐sized fillers into a polymer matrix and dispersing them uniformly. To effectively use PNCs in electrical insulation for power apparatus, extensive research into the physical and chemical phenomena associated with these new materials is required. This article aims to provide a comprehensive review of previous research on dielectric PNCs, including synthesis, electrical and nonelectrical characterization, and attendant issues from an electrical insulation standpoint.

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Space Charge Characteristics and Electrical Properties of Micro-Nano ZnO/LDPE Composites

Cited by 8 publications

References 16 publications

The Research of Conductivity and Dielectric Properties of ZnO/LDPE Composites with Different Particles Size

The Research of Conductivity and Dielectric Properties of ZnO/LDPE Composites with Different Particles Size

A review on polymeric insulation for high‐voltage application under various stress conditions

Dielectric polymer nanocomposites: Past advances and future prospects in electrical insulation perspective

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