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Advances in Nanoceramics and Nanoceramic-Reinforced Functional Composites
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Advances in Nanoceramics and Nanoceramic-Reinforced Functional Composites

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

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 2220

Special Issue Editor

Dr. Małgorzata Norek

E-Mail Website
Guest Editor
Institute of Materials Science & Engineering, Faculty of Advanced Technology & Chemistry, Military University of Technology, Warsaw, Poland
Interests: nanostructures; anodization; surface properties; optical materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Functional composites are essential to the development of next-generation technologies and materials for electronics, optics, biomedical, environmental, energy, and aerospace applications. The combination of two or more components mechanically integrated within one composite material allows for engineering unique structural and functional properties that cannot be achieved within a single constituent. Nanoceramics are frequently used as a component of functional composites owing to their high fatigue resistance, excellent toughness, and superplasticity that can considerably improve material performance especially under extreme conditions including strength retention at elevated temperatures, enhanced creep characteristics, etc. Moreover, their physical and chemical characteristics such as high porosity, high surface area, electro-optical abilities, magneto resistivity, and higher oxygen activity and dielectric constants can significantly contribute to the advancement in the development of energy harvesting, energy storage, and energy conversion materials. Therefore, the topics of this Special Issue include, but are not limited to, the following:

  • Synthesis and characterization of new functional composites;
  • Optical ceramics and composites;
  • Magnetic composites;
  • Ferroelectric composites;
  • Sensing and actuation properties of the composites;
  • Energy conversion and storage materials;
  • Biomedical and bio-compatible composites;
  • Composite materials with exceptional mechanical, thermal, and electrical properties;
  • Smart multi-functional composites;
  • Macro-, micro-, and nanoscale ceramics with novel functional properties.

Dr. Małgorzata Norek
Guest Editor

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

  • nanoceramics
  • functional composites
  • hybrid materials
  • porous ceramics
  • functional properties

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Published Papers (2 papers)

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Research

15 pages, 19604 KiB  
Article
Simultaneously Achieved High Piezoelectricity and High Resistivity in Na0.5Bi4.5Ti4O15-Based Ceramics with High Curie Temperature
by Zhengli Huan, Ning Chang, Yunyun Feng, Xuan Fei, Xiang Xu and Huiming Ji
Materials 2024, 17(23), 5857; https://doi.org/10.3390/ma17235857 - 29 Nov 2024
Viewed by 691
Abstract
Good piezoelectricity and high resistivity are prerequisites for high-temperature acceleration sensors to function correctly in high-temperature environments. Bismuth layered structure ferroelectrics (BLSFs) are promising candidates for piezoelectric ceramics with excellent piezoelectric performance at high temperatures, high electrical resistivity, and high Curie temperatures ( [...] Read more.
Good piezoelectricity and high resistivity are prerequisites for high-temperature acceleration sensors to function correctly in high-temperature environments. Bismuth layered structure ferroelectrics (BLSFs) are promising candidates for piezoelectric ceramics with excellent piezoelectric performance at high temperatures, high electrical resistivity, and high Curie temperatures (Tc). In this study, (LiMn)5+ is substituted for Bi at the A-site, and Ce-doping is performed to replace Ti ions in Na0.5Bi4.5Ti4O15, which achieves the desired combination of high piezoelectric coefficients and high resistivity. Herein, we prepared Na0.5Bi3(LiMn)0.9Ti4−xCexO15 high-temperature piezoelectric ceramics, achieving a high piezoelectric coefficient d33 of 32.0 pC/N and a high resistivity ρ of 1.2 × 108 Ω·cm (at 500 °C), and a high Curie temperature of 648 °C. It is important that the d33 variation remains within 8% over a wide temperature range from 25 °C to 600 °C, demonstrating excellent thermal stability. Structural characterization and microstructure analysis showed that the excellent piezoelectric coefficient and high resistivity of cerium-doped Na0.5Bi4.5Ti4O15-based ceramics are attributable to the synergistic effects of structural characteristics, defect concentration, refined grain size and domain morphology. This study demonstrates that the superior properties of Na0.5Bi3(LiMn)0.9Ti4−xCexO15 ceramics are crucial for the stable operation of high-temperature accelerometer sensors and for the development of high-temperature devices. Full article
(This article belongs to the Special Issue Advances in Nanoceramics and Nanoceramic-Reinforced Functional Composites)
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12 pages, 8340 KiB  
Article
Fabrication of Mid-Infrared Porous Anodic Alumina Optical Microcavities via Aluminum Anodization
by Ewelina Białek, Weronika Gruszczyńska, Maksymilian Włodarski, Malwina Liszewska and Małgorzata Norek
Materials 2024, 17(22), 5620; https://doi.org/10.3390/ma17225620 - 18 Nov 2024
Viewed by 1040
Abstract
This study reports the production of mid-infrared (MIR) porous anodic alumina (PAA)-based microcavities with tunable optical quality. The spectral position of the cavity resonance peak (λC), along with its intensity (IR) and Q-factor, varies depending on the geometric positioning [...] Read more.
This study reports the production of mid-infrared (MIR) porous anodic alumina (PAA)-based microcavities with tunable optical quality. The spectral position of the cavity resonance peak (λC), along with its intensity (IR) and Q-factor, varies depending on the geometric positioning of the cavity layer within the multilayer stack of alternating low- and high-porosity layers, as well as the type of cavity produced—either by high voltage (CvH-type) or low voltage (CvL-type) pulses. In most cases, PAA microcavities with CvH-type cavity layers exhibited superior light confinement properties compared to those with CvL-type cavities. Additionally, shifting the cavity layer from the center toward the edges of the multilayer stack enhanced the intensity of the resonance peak. For PAA microcavities with CvH-type cavity layers, the highest intensity (IR = 53%) and the largest Q-factor (Q = 31) were recorded at λC of around 5.1 µm. The anodization approach used in this study demonstrates significant potential for designing PAA-based microcavities with high optical performance in the MIR spectral region, especially with further refinement of electrochemical parameters. These findings pave the way for the development of new photonic materials specifically tailored for the MIR spectral range, broadening their applications in various optoelectronic and sensing technologies. Full article
(This article belongs to the Special Issue Advances in Nanoceramics and Nanoceramic-Reinforced Functional Composites)
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