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Structures, Properties, and Phase Transition in Dielectric Ceramics

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced and Functional Ceramics and Glasses".

Deadline for manuscript submissions: 10 November 2024 | Viewed by 881

Special Issue Editors


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Guest Editor
Institute of Advanced Ceramics, College of Materials Science and Engineering, Fuzhou University, 2 Xueyuan Road, University Town, Fuzhou 350108, China
Interests: dielectrics; ferroelectrics; phase transition; characterization
College of Electrical and Information Engineering, Hunan University, 410082, Changsha, China
Interests: microwave/millimeter-wave electronic components; low-temperature co-fired ceramics and integrated devices; dielectric energy storage ceramics
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Special Issue Information

Dear Colleagues,

Dielectric ceramics are an important material widely applied in the fields of electronics and energy for capacitive energy storage, electrostriction, electrocaloric cooling, etc. Their structure, phase transition, and dielectric mechanism are crucial to achieving high-performance dielectric ceramics with high breakdown strength, high permittivity, low loss, and a wide operating temperature range. Characterizing structure and phase transition and evaluating its properties are significant to developing dielectric ceramics. In order to promote academic exchanges, Materials plans to launch a Special Issue entitled “Structures, Properties, and Phase Transition in Dielectric Ceramics”. This Special Issue aims to provide a unique international forum for researchers working in dielectric ceramics to report their latest endeavors to advance this field, including new pristine dielectric ceramics, strategies used to improve dielectric properties, dielectric mechanisms, the structures and phase transition of dielectric ceramics, the discovery of new dielectric ceramics, and so on. We will solicit high-level research papers and reviews globally.

Prof. Dr. Xinghua Zheng
Dr. Hao Li
Guest Editors

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Keywords

  • phase transition

  • dielectric properties
  • core-shell
  • sintering temperature
  • dielectric mechanism
  • grain growth
  • dielectric relaxation

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Published Papers (1 paper)

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Research

15 pages, 14021 KiB  
Article
Crystal Structure, Infrared Reflection Spectrum, and Improved Microwave Dielectric Characteristics of Ba4Sm28/3Ti18O54 Ceramics via One-Step Reaction Sintering
by Zeping Li, Huajian Zhou, Gang Xiong, Huifeng Wang and Geng Wang
Materials 2024, 17(14), 3477; https://doi.org/10.3390/ma17143477 - 13 Jul 2024
Viewed by 687
Abstract
High-k Ba4Sm28/3Ti18O54 ceramics with improved microwave dielectric characteristics were successfully fabricated using the one-step reaction sintering (RS) route. The sintering characteristics, microstructure, crystal structure, infrared reflection spectrum, and microwave dielectric characteristics of Ba4Sm28/3 [...] Read more.
High-k Ba4Sm28/3Ti18O54 ceramics with improved microwave dielectric characteristics were successfully fabricated using the one-step reaction sintering (RS) route. The sintering characteristics, microstructure, crystal structure, infrared reflection spectrum, and microwave dielectric characteristics of Ba4Sm28/3Ti18O54 ceramics prepared by the RS route were systematically investigated. Samples prepared by the RS route exhibited single-phase orthorhombic tungsten–bronze structure and dense microstructure at optimum sintering temperature. Compared with the conventional solid-state (CS) process, the Ba4Sm28/3Ti18O54 ceramics fabricated by the RS route presented a smaller temperature coefficient (TCF), a higher quality factor (Q × f), and a higher permittivity (εr). The improved microwave dielectric characteristics were highly dependent on the theoretical permittivity, atomic packing fraction, suppression of Ti3+, and Ti-site bond valence. Excellent combined microwave dielectric characteristics (TCF = −7.9 ppm/°C, Q × f = 9519 GHz, εr = 80.26) were achieved for Ba4Sm28/3Ti18O54 ceramics prepared by RS route sintered at 1400 °C, suggesting the RS route was a straightforward, economical and effective route to prepare high-performance Ba4Sm28/3Ti18O54 ceramics with promising application potential. Full article
(This article belongs to the Special Issue Structures, Properties, and Phase Transition in Dielectric Ceramics)
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