Dielectric Composite Materials

A special issue of Journal of Composites Science (ISSN 2504-477X). This special issue belongs to the section "Composites Manufacturing and Processing".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 1587

Special Issue Editors


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Guest Editor
1. Saint-Petersburg State Institute of Technology, Technical University, Saint Petersburg, Russia
2. Institute of Silicate Chemistry, St. Petersburg, Russia
Interests: polymer composites; ceramics; additive technologies; donor-acceptor properties of solid surfaces; interface interactions; luminescent materials

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Guest Editor
Saint-Petersburg State Institute of Technology, Technical University, Saint Petersburg, Russia
Interests: surfaces and interfaces; composites; ceramics; electrochromic materials

Special Issue Information

Dear Colleagues,

The Special Issue "Dielectric Composite Materials” will involve regular research articles, reviews and short communications devoted to the development, preparation, characterization, modelling/simulation, fabrication (including additive technologies) and applications of composites with specific dielectric properties such as electrical resistance, permittivity (particularly high-k and low-k materials), dielectric loss, electric strength and other target performances tunable by the adjustment of the composition (binder and filler materials and their ratios) and structure (including filler distribution determined by interfacial interactions, incorporation of special additives, etc.).

This Special Issue will particularly address the problems relating to the enhancement of dielectric performances for various materials useful as insulating layers, components of energy storage systems, capacitors, displays and other electronic devices, including flexible, wearable and stretchable electronics.

Prof. Dr. Maxim Sychov
Dr. Sergey Mjakin
Guest Editors

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Keywords

  • dielectric properties
  • composites
  • permittivity
  • dielectric loss
  • electric strength
  • electrical resistance
  • interfacial interactions
  • “core-shell” structure
  • modelling
  • simulation
  • electronics

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Published Papers (1 paper)

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Research

14 pages, 14453 KiB  
Article
Synthesis, Microstructure, and Electrical Conductivity of Eutectic Composites in MF2–RF3 (M = Ca, Sr, Ba; R = La–Nd) Systems
by Irina I. Buchinskaya, Natalia A. Arkharova, Anna G. Ivanova, Nikolay I. Sorokin and Denis N. Karimov
J. Compos. Sci. 2023, 7(8), 330; https://doi.org/10.3390/jcs7080330 - 15 Aug 2023
Cited by 1 | Viewed by 1268
Abstract
Multiphase fluoride polycrystalline eutectics pRF3 × qMF2 forming in the MF2–RF3 (M = Ca, Sr, Ba; R = La–Nd) binary systems were synthesized by the directional crystallization technique from a melt. The phase composition, morphology, and [...] Read more.
Multiphase fluoride polycrystalline eutectics pRF3 × qMF2 forming in the MF2–RF3 (M = Ca, Sr, Ba; R = La–Nd) binary systems were synthesized by the directional crystallization technique from a melt. The phase composition, morphology, and temperature dependences of fluorine ionic conductivity in fabricated composites were studied in detail. The pRF3 × qMF2 (p and q are the mole percentages of components) eutectic composites consist of both extremely saturated fluorite-type structure M1−xRxF2+x solid solutions and the tysonite-type R1−yMyF3−y ones. Microsized growth blocks with a fine lamellar structure are typical for synthesized composites. The thinnest (from 3 μm) and longest lamellae are observed in the 68LaF3 × 32BaF2 composition. The ionic conductivity values of pRF3 × qMF2 composites are determined by the phase composition, practically do not depend on their morphological features, and reach 10−3–10−2 S/cm at 500 K (with an ion transport activation enthalpy of about 0.5–0.6 eV). Crystallized eutectics are superior to any single-phase M1−xRxF2+x solid solutions and ball-milling R1−yMyF3−y nanoceramics in terms of ion-conducting properties. These fluoride materials represent an alternative to widely applied tysonite-type ceramic composites in various electrochemical devices and require further in-depth studies. Full article
(This article belongs to the Special Issue Dielectric Composite Materials)
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