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Crystals
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Transparent Glass Ceramics
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Transparent Glass Ceramics

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

Deadline for manuscript submissions: closed (27 October 2020) | Viewed by 15763

Special Issue Editors

Dr. Atul D. Sontakke

E-Mail Website
Guest Editor
Condensed Matter & Interfaces, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 1, 3584 CC Utrecht, The Netherlands
Interests: optical and photonic materials; phosphors; scintillators; laser materials; white LEDs; glass; ceramics; glass-ceramics; composites.
Dr. Shiv Prakash Singh

E-Mail Website
Guest Editor
Center for Ceramic Processing, International Advanced Research Center for Powder Metallurgy and New Materials (ARCI), Hyderbad, India
Interests: Glass, Glass Ceramics, Glass Powders and Paste, Nanostructured Materials

Special Issue Information

Dear Colleagues,

Glass ceramics are a very interesting class of engineered materials capable of incorporating extreme optical, mechanical, and thermal properties. For this Special Issue, we aim to present a collection of papers encompassing a wide range of topics on transparent glass ceramics, including their developmental aspects, properties, and applications in different technological frontiers. The collection of contributed articles will also summarize recent developments in transparent glass ceramics.

This Special Issue will focus on the following topics:

  • Crystallization kinetics, controlled crystallization, total crystallization, laser crystallization, photo-thermo-crystallization, and microstructures;
  • Transparent glass ceramics for infrared windows, low thermal expansion substrates/monoliths, solid-state lighting, waveguides, laser cavities, non-linear effects, and luminescent hosts;
  • Improved mechanical strength, hardness, structural glass ceramics, transparency, and birefringence;
  • Nano-glass ceramics and transparent ceramics.

It is my great pleasure to invite you to contribute to this Special Issue of the MDPI journal Crystals (2018 impact factor: 2.086) on “Transparent Glass Ceramics”. Contributions on all relevant topics are welcome.

Dr. Atul D. Sontakke
Dr. Shiv Prakash Singh
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

  • transparent glass-ceramics
  • controlled crystallization
  • infrared windows
  • optical waveguides
  • zero thermal expansion
  • transparent ceramics

Published Papers (4 papers)

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Editorial

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3 pages, 181 KiB  
Editorial
Transparent Glass Ceramics
by Shiv Prakash Singh and Atul D. Sontakke
Crystals 2021, 11(2), 156; https://doi.org/10.3390/cryst11020156 - 4 Feb 2021
Cited by 8 | Viewed by 3565
Abstract
In the past few decades, glass ceramic (GC) has revolutionized the application of glass [...] Full article
(This article belongs to the Special Issue Transparent Glass Ceramics)

Research

Jump to: Editorial

14 pages, 12277 KiB  
Article
Library of UV-Visible Absorption Spectra of Rare Earth Orthophosphates, LnPO4 (Ln = La-Lu, except Pm)
by Suchinder K. Sharma, Thomas Behm, Thomas Köhler, Jan Beyer, Richard Gloaguen and Johannes Heitmann
Crystals 2020, 10(7), 593; https://doi.org/10.3390/cryst10070593 - 9 Jul 2020
Cited by 9 | Viewed by 4872
Abstract
In recent times, rare earth orthophosphates ( L n PO 4 ) have shown great potential as efficient optical materials. They possess either m o n a z i t e or x e n o t i m e –type structures. These [...] Read more.
In recent times, rare earth orthophosphates ( L n PO 4 ) have shown great potential as efficient optical materials. They possess either m o n a z i t e or x e n o t i m e –type structures. These light or heavy rare earth bearing orthophosphates also exhibit an extraordinary stability over geological time scale in nature, ∼10 9 years. In the present contribution, we measure, collect, and present a library of absorption spectra of all the L n PO 4 hosts ( L n = La–Lu, except Pm) using their single crystal samples, to conclude that the observed spectral features for wavelengths longer than 200 nm were attributable to either Ln- or defect related centers, which corroborate the fact that they have a bandgap higher than 8.0 eV. The absorption band around wavelength, 275 nm, corresponds to defect absorption related to PO 3 centers and/or oxygen vacancies. The hosts can potentially be used to study and interpret unperturbed rare earth emissions due to absence of host related absorption above 300 nm. The information presented herein is expected to serve as a library of absorption spectra for geologists, physicists, material scientists, and chemists working in the field of rare earths. Full article
(This article belongs to the Special Issue Transparent Glass Ceramics)
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14 pages, 4546 KiB  
Article
Crystallization of GeO2–Al2O3–Bi2O3 Glass
by Małgorzata Płońska and Julian Plewa
Crystals 2020, 10(6), 522; https://doi.org/10.3390/cryst10060522 - 18 Jun 2020
Cited by 7 | Viewed by 3939
Abstract
In the presented work, two kinds of germanium oxide glass with different compositions, namely GeO2 and GeO2–Al2O3–Bi2O3, were investigated. After controlled crystallization of a glassy sample, the emission in the NIR-range was [...] Read more.
In the presented work, two kinds of germanium oxide glass with different compositions, namely GeO2 and GeO2–Al2O3–Bi2O3, were investigated. After controlled crystallization of a glassy sample, the emission in the NIR-range was determined (1165 nm with excitation at 470 nm). To better understanding the kinetics of the glass crystallization, the activation energy was also determined by applying the Kissinger method. The obtained results show that in the case of GeO2–Al2O3–Bi2O3, activation energy value was 400 and 477 kJ/mol, which means that such values are significantly larger than for pure GeO2 (254 kJ/mol). The investigations also show that two phases crystallized in the complex glass matrix: the mullite-like phase and germanium oxide. Full article
(This article belongs to the Special Issue Transparent Glass Ceramics)
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Graphical abstract

12 pages, 2732 KiB  
Article
Luminescence Behavior of GdVO4: Tb Nanocrystals in Silica Glass-Ceramics
by Shuai Han, Yiting Tao, Ying Du, Sasa Yan, Yanping Chen and Danping Chen
Crystals 2020, 10(5), 396; https://doi.org/10.3390/cryst10050396 - 15 May 2020
Cited by 6 | Viewed by 2643
Abstract
Glass ceramics with GdVO4: Tb nanocrystals impregnated in the highly transparent silica glass were prepared by the porous glass and sintering process and confirmed by XRD, Raman spectrum, and TEM. Spectral analysis shows that there are multifarious energy transfer processes in [...] Read more.
Glass ceramics with GdVO4: Tb nanocrystals impregnated in the highly transparent silica glass were prepared by the porous glass and sintering process and confirmed by XRD, Raman spectrum, and TEM. Spectral analysis shows that there are multifarious energy transfer processes in GdVO4: Tb nanocrystals, such as VO43− → Tb3+, Gd3+ → VO43−, Gd3+ → VO43− → Tb3+, and Gd3+ → Tb3+, and the main one is VO43− → Tb3+. In this process, 3T1,2 → 1A1 transition of VO43− transfers the energy to Tb3+ and generates 5D3 → 7F6,5,4,3,2 and 5D4 → 7F5 transitions of Tb3+. The energy transfer efficiency is 29.5%, and the excitation wavelength range of Tb3+ ions can be shifted from 230–260 nm to 280–365 nm. This shows that GdVO4 can effectively change the excitation wavelength of Tb3+, which is conducive to the application of Tb3+ ions excited by LED light sources. Full article
(This article belongs to the Special Issue Transparent Glass Ceramics)
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