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Special Issue "Polymer Derived Ceramics and Applications"

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: 31 January 2018

Special Issue Editors

Guest Editor
Dr. Samuel Bernard

SPCTS (UMR CNRS 7315), European Ceramic Center, Limoges-France, European Membrane Institute, Montpellier-France
Website | E-Mail
Interests: precursor synthesis; processing and shaping; polymer-to-ceramic conversion; porous components; nanocomposites; fibers; structural properties; functional properties
Guest Editor
Dr. Emanuel Ionescu

Technische Universität Darmstadt, Institute for Materials Science, Jovanka-Bontschits-Strasse 2, D-64287 Darmstadt, Germany
Y Universität zu Köln, Institute for Inorganic Chemistry, Greinstrasse 6, 50939 Köln, Germany
Website | E-Mail
Fax: +49-6151-16-6346
Interests: nanocomposite materials; ceramic nanocomposites; ultrahigh-temperature stable materials; multifunctional nanocomposites; single-source-precursor-based syntheses; materials chemistry; organometallic and polymer chemistry

Special Issue Information

Dear Colleagues,

The polymer-derived ceramic (PDC) route is based on the synthesis of preceramic polymers as suitable and highly pure synthetic precursors to supply after pyrolysis ceramics with a desired phase distribution and homogeneity. Additionally, the PDC route allows for polymer shaping to produce, after pyrolysis, complex-shaped ceramic parts, such as (nano)fibers, coatings, or dense pieces. Ceramics with various pore scales can be also made from them. Following a more conventional ceramic processing route, preceramic polymers can be directly pyrolyzed into ceramic powders with the desired composition, to be sintered into dense objects. This route leads to three classes of products: 1) amorphous networks, containing the constituents, homogeneously dispersed at the atomic level; 2) crystalline phases; and 3) composites and nanocomposites of binary or multinary phases, that provide a large variety of properties and functions for basic research and application technologies, from energy and environment to transportation, aerospace, and defense applications.

This Special Issue aims to provide a range of comprehensive reviews and research articles on advances in the synthesis and application of PDCs. The scientific issues related to the synthesis and application of PDCs include the molecular chemistry and engineering of processable and functional preceramic polymers, polymer processing and shaping through in particular innovating processes, such as additive manufacturing, advanced and innovative polymer-to-ceramic conversion methods, special nano/microstructure features of PDCs, modeling and thermodynamics of PDCs and functional properties. Papers that emphasize applications of PDCs are also welcomed.

Dr. Samuel Bernard
Dr. Emanuel Ionescu
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 papers will be 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 monthly 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 1600 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

  • Preceramic polymers
  • Single-source precursors
  • Synthesis
  • Processing and Shaping
  • Polymer-to-ceramic conversion
  • (Oxy)Carbides
  • Carbonitrides
  • (Oxy)Nitrides
  • Amorphous phases
  • Crystalline materials
  • (Nano)composites
  • Additive manufacturing
  • Porous components
  • Fibers
  • Coatings
  • Dense parts
  • Applications

Published Papers (3 papers)

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Research

Open AccessFeature PaperArticle High-Temperature Raman Spectroscopy of Nano-Crystalline Carbon in Silicon Oxycarbide
Materials 2018, 11(1), 93; doi:10.3390/ma11010093
Received: 5 December 2017 / Revised: 26 December 2017 / Accepted: 5 January 2018 / Published: 9 January 2018
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Abstract
The microstructure of segregated carbon in silicon oxycarbide (SiOC), hot-pressed at T = 1600 °C and p = 50 MPa, has been investigated by VIS Raman spectroscopy (λ = 514 nm) within the temperature range 25–1000 °C in air. The occurrence of the
[...] Read more.
The microstructure of segregated carbon in silicon oxycarbide (SiOC), hot-pressed at T = 1600 °C and p = 50 MPa, has been investigated by VIS Raman spectroscopy (λ = 514 nm) within the temperature range 25–1000 °C in air. The occurrence of the G, D’ and D bands at 1590, 1620 and 1350 cm−1, together with a lateral crystal size La < 10 nm and an average distance between lattice defects LD ≈ 8 nm, provides evidence that carbon exists as nano-crystalline phase in SiOC containing 11 and 17 vol % carbon. Both samples show a linear red shift of the G band up to the highest temperature applied, which is in agreement with the description of the anharmonic contribution to the lattice potential by the modified Tersoff potential. The temperature coefficient χG = −0.024 ± 0.001 cm−1/°C is close to that of disordered carbon, e.g., carbon nanowalls or commercial activated graphite. The line width of the G band is independent of temperature with FWHM-values of 35 cm−1 (C-11) and 45 cm−1 (C-17), suggesting that scattering with defects and impurities outweighs the phonon-phonon and phonon-electron interactions. Analysis of the Raman line intensities indicates vacancies as dominating defects. Full article
(This article belongs to the Special Issue Polymer Derived Ceramics and Applications)
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Open AccessFeature PaperArticle Synthesis of a Novel Polyethoxysilsesquiazane and Thermal Conversion into Ternary Silicon Oxynitride Ceramics with Enhanced Thermal Stability
Materials 2017, 10(12), 1391; doi:10.3390/ma10121391
Received: 26 October 2017 / Revised: 27 November 2017 / Accepted: 29 November 2017 / Published: 5 December 2017
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Abstract
A novel polyethoxysilsesquiazane ([EtOSi(NH)1.5]n, EtOSZ) was synthesized by ammonolysis at −78 °C of ethoxytrichlorosilane (EtOSiCl3), which was isolated by distillation as a reaction product of SiCl4 and EtOH. Attenuated total reflection-infra red (ATR-IR), 13C-, and
[...] Read more.
A novel polyethoxysilsesquiazane ([EtOSi(NH)1.5]n, EtOSZ) was synthesized by ammonolysis at −78 °C of ethoxytrichlorosilane (EtOSiCl3), which was isolated by distillation as a reaction product of SiCl4 and EtOH. Attenuated total reflection-infra red (ATR-IR), 13C-, and 29Si-nuclear magnetic resonance (NMR) spectroscopic analyses of the ammonolysis product resulted in the detection of Si–NH–Si linkage and EtO group. The simultaneous thermogravimetric and mass spectrometry analyses of the EtOSZ under helium revealed cleavage of oxygen-carbon bond of the EtO group to evolve ethylene as a main gaseous species formed in-situ, which lead to the formation at 800 °C of quaternary amorphous Si–C–N with an extremely low carbon content (1.1 wt %) when compared to the theoretical EtOSZ (25.1 wt %). Subsequent heat treatment up to 1400 °C in N2 lead to the formation of X-ray amorphous ternary Si–O–N. Further heating to 1600 °C in N2 promoted crystallization and phase partitioning to afford Si2N2O nanocrystallites identified by the XRD and TEM analyses. The thermal stability up to 1400 °C of the amorphous state achieved for the ternary Si-O-N was further studied by chemical composition analysis, as well as X-ray photoelectron spectroscopy (XPS) and 29Si-NMR spectroscopic analyses, and the results were discussed aiming to develop a novel polymeric precursor for ternary amorphous Si–O–N ceramics with an enhanced thermal stability. Full article
(This article belongs to the Special Issue Polymer Derived Ceramics and Applications)
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Open AccessArticle Properties and Applications of High Emissivity Composite Films Based on Far-Infrared Ceramic Powder
Materials 2017, 10(12), 1370; doi:10.3390/ma10121370
Received: 11 October 2017 / Revised: 22 November 2017 / Accepted: 23 November 2017 / Published: 29 November 2017
PDF Full-text (6250 KB) | HTML Full-text | XML Full-text
Abstract
Polymer matrix composite materials that can emit radiation in the far-infrared region of the spectrum are receiving increasing attention due to their ability to significantly influence biological processes. This study reports on the far-infrared emissivity property of composite films based on far-infrared ceramic
[...] Read more.
Polymer matrix composite materials that can emit radiation in the far-infrared region of the spectrum are receiving increasing attention due to their ability to significantly influence biological processes. This study reports on the far-infrared emissivity property of composite films based on far-infrared ceramic powder. X-ray fluorescence spectrometry, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray powder diffractometry were used to evaluate the physical properties of the ceramic powder. The ceramic powder was found to be rich in aluminum oxide, titanium oxide, and silicon oxide, which demonstrate high far-infrared emissivity. In addition, the micromorphology, mechanical performance, dynamic mechanical properties, and far-infrared emissivity of the composite were analyzed to evaluate their suitability for strawberry storage. The mechanical properties of the far-infrared radiation ceramic (cFIR) composite films were not significantly influenced (p ≥ 0.05) by the addition of the ceramic powder. However, the dynamic mechanical analysis (DMA) properties of the cFIR composite films, including a reduction in damping and shock absorption performance, were significant influenced by the addition of the ceramic powder. Moreover, the cFIR composite films showed high far-infrared emissivity, which has the capability of prolonging the storage life of strawberries. This research demonstrates that cFIR composite films are promising for future applications. Full article
(This article belongs to the Special Issue Polymer Derived Ceramics and Applications)
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