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Crystals
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Functional Glass-Ceramics
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Functional Glass-Ceramics

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (20 April 2021) | Viewed by 8655

Special Issue Editors

Prof. Dr. Marcin Środa

E-Mail Website
Guest Editor
Department of Glass Technology and Amorphous Coatings, AGH University of Science and Technology, 30-059 Krakow, Poland
Interests: glass technology; oxyfluoride glasses; thermal and spectroscopic properties of glass; glass-ceramics; amorphous coatings
Special Issues, Collections and Topics in MDPI journals
Dr. Iwona Grelowska

E-Mail Website
Guest Editor
AGH University of Science and Technology, Krakow MP, Poland

Special Issue Information

For a very long time, the main effort of glassmakers was focused on avoidance of glass crystallization during glass production. However, in the second half of the 20th century, the accidental discovery of the mechanical properties of glass-ceramics by S. Donald Stookey lead to a profound shift. Since then, the process of glass crystallization has been continuously developed, and new oxide and non-oxide glass systems have been studied to fulfill medical, optical, electronic, thermal, and mechanical needs. It is a well-known fact that significant changes in properties are observed when glass transforms into glass-ceramics. The wide range of compositions gives the opportunity to develop materials for demanding requirements.

This Special Issue is focused on new materials based on glass-ceramics, their properties, and application.

We believe that this Special Issue will help to create a stimulating platform enabling studies on glass-ceramics.

Prof. Marcin Środa
Dr. Iwona Grelowska
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. Crystals 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 2100 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

  • Glass-ceramics
  • Structure and microstructure
  • Methods of processing
  • Thermal and mechanical properties
  • Photonic glass-ceramics
  • Application of glass-ceramics
  • Thermodynamics

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Published Papers (2 papers)

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Research

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12 pages, 2855 KiB  
Article
Effect of Solvent and Catalyst Types on Stability and Properties of Zinc Phthalocyanine in the Organic–Inorganic Hybrid Materials
by Barbara Popanda, Marcin Środa and Katarzyna Cholewa-Kowalska
Crystals 2021, 11(6), 592; https://doi.org/10.3390/cryst11060592 - 24 May 2021
Cited by 3 | Viewed by 2400
Abstract
Hybrid materials, i.e., the organically modified silicates (ORMOSIL) based on zincphthalocyanine (ZnPc) and silica glass matrix were synthesized by the sol-gel method using protic solvents (methanol, ethanol, isopropanol, butanol) and aprotic solvent (N,N-dimethylformamide; DMF). The effect of an alkaline environment with NaOH addition [...] Read more.
Hybrid materials, i.e., the organically modified silicates (ORMOSIL) based on zincphthalocyanine (ZnPc) and silica glass matrix were synthesized by the sol-gel method using protic solvents (methanol, ethanol, isopropanol, butanol) and aprotic solvent (N,N-dimethylformamide; DMF). The effect of an alkaline environment with NaOH addition (a single-stage process) and acid–alkaline environment with CH3COOH-NH4OH and HCl-NaOH (a two-stage process) was analyzed. UV-Vis spectroscopy was used to study the stability of ZnPc in the sol. The highest stability of zinc phthalocyanine in the glass was obtained for synthesis with isopropanol in the presence of the alkaline catalyst. The lowest stability of ZnPc was observed when the aprotic solvent was used. The structure and optical properties of the gels were studied by SEM, FTIR, and XRD techniques and optically stimulated luminescence (OSL) and thermoluminescence (TL), respectively. The thermal stability of the materials was analyzed by TG-DSC methods. Full article
(This article belongs to the Special Issue Functional Glass-Ceramics)
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Review

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37 pages, 6060 KiB  
Review
Recent Developments in Carbon Nanotubes-Reinforced Ceramic Matrix Composites: A Review on Dispersion and Densification Techniques
by Kar Fei Chan, Mohd Hafiz Mohd Zaid, Md Shuhazlly Mamat, Shahira Liza, Masaki Tanemura and Yazid Yaakob
Crystals 2021, 11(5), 457; https://doi.org/10.3390/cryst11050457 - 21 Apr 2021
Cited by 27 | Viewed by 5726
Abstract
Ceramic matrix composites (CMCs) are well-established composites applied on commercial, laboratory, and even industrial scales, including pottery for decoration, glass–ceramics-based light-emitting diodes (LEDs), commercial cooking utensils, high-temperature laboratory instruments, industrial catalytic reactors, and engine turbine blades. Despite the extensive applications of CMCs, researchers [...] Read more.
Ceramic matrix composites (CMCs) are well-established composites applied on commercial, laboratory, and even industrial scales, including pottery for decoration, glass–ceramics-based light-emitting diodes (LEDs), commercial cooking utensils, high-temperature laboratory instruments, industrial catalytic reactors, and engine turbine blades. Despite the extensive applications of CMCs, researchers had to deal with their brittleness, low electrical conductivity, and low thermal properties. The use of carbon nanotubes (CNTs) as reinforcement is an effective and efficient method to tailor the ceramic structure at the nanoscale, which provides considerable practicability in the fabrication of highly functional CMC materials. This article provides a comprehensive review of CNTs-reinforced CMC materials (CNTs-CMCs). We critically examined the notable challenges during the synthesis of CNTs-CMCs. Five CNT dispersion processes were elucidated with a comparative study of the established research for the homogeneity distribution in the CMCs and the enhanced properties. We also discussed the effect of densification techniques on the properties of CNTs-CMCs. Additionally, we synopsized the outstanding microstructural and functional properties of CNTs in the CNTs-CMCs, namely stimulated ceramic crystallization, high thermal conductivity, bandgap reduction, and improved mechanical toughness. We also addressed the fundamental insights for the future technological maturation and advancement of CNTs-CMCs. Full article
(This article belongs to the Special Issue Functional Glass-Ceramics)
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