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Advances in Electrical Insulating Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Electronic Materials".

Deadline for manuscript submissions: closed (10 July 2023) | Viewed by 3390

Special Issue Editors


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Guest Editor
School of Electrical Engineering, China University of Mining and Technology, Xuzhou 221116, China
Interests: high voltage power equipment; machine learning techniques in high voltage engineering; arc modeling; cryogenic dielectrics; superconducting power devices for power grid; SF6 gas alternatives
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School of Energy and Electrical Engineering, Hohai University, Nanjing 210098, China
Interests: space charge; composites; nanotechnology; electrical property

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Co-Guest Editor
School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Interests: power converters; renewable generation; nonlinear circuits and its application; high power EV charger
Special Issues, Collections and Topics in MDPI journals

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Co-Guest Editor
School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Interests: thermal conductivity; epoxy composites; nNano technology; energy storage technique

Special Issue Information

Dear Colleagues,

Electrical insulating materials are widely used in electrical power, automobiles, new energy, 5G communication and other industries. From the perspective of their industrial chain, polymer-based organic composites have attracted significant attention. Therefore, nanotechnology doping can improve different characteristics (e.g., electrical properties, thermal properties, mechanical properties, etc.) of the materials. Until now, some encouraging results have been achieved by blending micro- and nano-particles due to the great progress of utilizing carbon fiber in composite materials. At present, the main research fields include: the improvement of the insulation stability of polypropylene cables, the long-term stable operation of high-voltage DC submarine cables, the uncoordinated improvement of the electrical and thermal properties of power electronic packaging insulation, the engineering application of plant nano-oil and oil-paper, the stable operation of composite insulators, the insulation stability of energy storage batteries, the dispersion of micro-/nano-blends, and microscopic mechanism analysis, etc.

The focus of this Special Issue (SI), entitled: “Advances in Electrical Insulating Materials”, is on the key issues and research ideas of electrical insulating materials through interdisciplinary fields. Topics for this Special Issue include, but are not limited to:

  • Advances in solid, liquid and gas insulation materials
  • Progress in cryogenic dielectrics
  • Computational studies of insulation materials
  • High-voltage cable insulation materials
  • Research trends in outdoor polymeric insulation and environmental effects
  • Advances in the insulation of power transformers, generators and motors
  • AI and machine learning techniques in insulation materials
  • Encapsulation materials for power electronics
  • Emerging and topical applications of superconducting insulating materials
  • Progress in SF6 alternative materials

Dr. Muhammad Junaid
Guest Editor

Dr. Chao Dai
Prof. Dr. Dongsheng Yu
Dr. Zhengdong Wang
Co-Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electrical insulating material
  • interdisciplinary
  • nanotechnology
  • composites
  • insulation property
  • thermal property
  • mechanical property
  • arc quenching material

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Published Papers (2 papers)

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Research

14 pages, 5013 KiB  
Article
Electrical Resistance Performance of Cable Accessory Interface Considering Thermal Effects
by Kai Wu, Tianfeng Zhang, Wenxin Lin, Shaolei Wu, Yu Feng, Xiangyu Zuo and Yunxiao Zhang
Materials 2023, 16(11), 4122; https://doi.org/10.3390/ma16114122 - 1 Jun 2023
Cited by 5 | Viewed by 1336
Abstract
Power cables are widely used in various fields of power transmission, and cable accessories are the weakest link in power cable systems due to their complex structure and multi-layer insulation coordination issues. This paper investigates the changes in electrical properties of the silicone [...] Read more.
Power cables are widely used in various fields of power transmission, and cable accessories are the weakest link in power cable systems due to their complex structure and multi-layer insulation coordination issues. This paper investigates the changes in electrical properties of the silicone rubber/cross-linked polyethylene (SiR/XLPE) interface at high temperatures. The physicochemical properties of XLPE material under thermal effects with different times are characterized through FTIR, DSC, and SEM tests. Finally, the mechanism of the effects of the interface state on the electrical properties of the SiR/XLPE interface is analyzed. It is found that with the increase in temperature, the changes in electrical performance of the interface do not show a monotonic downward trend, while interestingly, they can be divided into three stages. Under the thermal effects for 40 d, the internal recrystallization of XLPE in the early stage improves the electrical properties of the interface. In the later stage of thermal effects, the amorphous region inside the material is severely damaged and the molecular chains are severely broken, resulting in a decrease in the electrical properties of the interface. The results above provide a theoretical basis for the interface design of cable accessories at high temperatures. Full article
(This article belongs to the Special Issue Advances in Electrical Insulating Materials)
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11 pages, 3046 KiB  
Article
First-Principles Computational Study of the Modification Mechanism of Graphene/Graphene Oxide on Hydroxyapatite
by Yanqing Wang, Minghui Xie, Zheng Zhou, Muhammad Junaid, Weilin Zong and Shengyang Du
Materials 2022, 15(23), 8652; https://doi.org/10.3390/ma15238652 - 5 Dec 2022
Viewed by 1273
Abstract
Due to its unique crystal structure and nano-properties, hydroxyapatite (HA) has become an important inorganic material with broad development prospects in electrical materials, for fire resistance and insulation, and in bone repair. However, its application is limited to some extent because of its [...] Read more.
Due to its unique crystal structure and nano-properties, hydroxyapatite (HA) has become an important inorganic material with broad development prospects in electrical materials, for fire resistance and insulation, and in bone repair. However, its application is limited to some extent because of its low strength, brittleness and other shortcomings. Graphene (G) and its derivative graphene oxide (GO) are well known for their excellent mechanical properties, and are widely used to modify HA by domestic and foreign scholars, who expect to achieve better reinforcement and toughening effects. However, the enhancement mechanism has not been made clear. Accordingly, in this study, G and GO were selected to modify HA using the first-principles calculation method to explore the theory of interfacial bonding of composites and explain the microscopic mechanism of interfacial bonding. First-principles calculation is a powerful tool used to solve experimental and theoretical problems and predict the structure and properties of new materials with precise control at the atomic level. Therefore, the bonding behaviors of hydroxyapatite (100), (110) and (111) crystal planes with G or GO were comprehensively and systematically studied using first-principles calculation; this included analyses of the density of states and differential charge density, and calculations of interfacial adhesion work and elastic moduli. Compared to HA (100) and (111) crystal planes, HA (110) had the best bonding performance with G and with GO, as revealed by the calculation results. The composite material systems of HA (110)/G and HA (110)/GO had the smallest density of states at the Fermi level, the largest charge transfers of Ca atoms, the largest interfacial adhesion work and the most outstanding elastic moduli. These results provide a theoretical basis for the modification of HA to a certain extent, and are beneficial to the expansion of the scope of its application. Full article
(This article belongs to the Special Issue Advances in Electrical Insulating Materials)
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