Article
Materials Science, Ceramics
Chengjun Liu, Rui Zhang, Xuan Zhao, Jixiang Jia, Yi Min
Summary: The structures of phosphorus in CaO-SiO2-P2O5 glasses were analyzed through Raman spectroscopy and calibrated using P-31 MAS-NMR spectroscopy. It was found that CaO had a stronger ability to depolymerize [PO4]-tetrahedrons compared to [SiO4]-tetrahedrons, and the addition of P2O5 increased the degree of polymerization of Si.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Svetlana V. Pershina, Boris D. Antonov, Ivan I. Leonidov
Summary: The glasses synthesized by melt quenching method exhibit a tendency of devitrification with increased MoO3 content and higher glass transition temperatures. Raman spectroscopy shows the presence of different structural units in the glasses, and the electrical conductivity increases with the MoO3 content.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
Nicholas J. Tostanoski, S. K. Sundaram
Summary: This study reports the structure-terahertz property relationship for sodium tungsten tellurite (NWT) and lanthanum tungsten tellurite (LWT) glass systems, which is the first of its kind for non-silicate oxide glasses. The results show three distinct regions of terahertz refractive index.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Ceramics
Bing Yuan, Bruce G. Aitken, Derrick C. Kaseman, Ping Yu, Sabyasachi Sen
Summary: The atomic structure of glass along the P4Se3-As4Se3 join with different compositions was studied using various spectroscopic techniques. The results showed the coexistence of cage-like molecular moieties and corner-shared network moieties in these glasses. The increase in substitution of As with P correlated with an increase in the ratio of molecules to network, which also affected the glass transition temperature.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Guilherme M. Martins, Cristiano Fantini, Roberto L. Moreira, Anderson Dias
Summary: In this study, Gd2Ge2O7 polymorphs were obtained by solid-state reactions and their structural and vibrational features were investigated. The electronic transitions of Gd3+ 4f-4f were examined by diffuse reflectance spectroscopy and bandgap values were determined using the Kubelka-Munk function. The results showed that polymorphism in Gd2Ge2O7 ceramics can be utilized to tailor materials with specific optical properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Nicholas J. Tostanoski, Edwin J. Heilweil, Peter F. Wachtel, J. David Musgraves, S. K. Sundaram
Summary: In this study, the structure-terahertz (THz) property relationship of various non-oxide chalcogenide glasses, including unary, binary, and ternary systems, was investigated. Raman spectroscopy was used to examine the glass structure, while terahertz time-domain spectroscopy (THz-TDS) was used to measure the THz refractive index. The study found that vitreous selenium had the lowest THz refractive index value, followed by arsenic sulfide and arsenic selenide glasses. Germanium selenide glasses showed an increased THz refractive index with increasing germanium content. A correlation between long-wave infrared and THz refractive index was also presented for all studied chalcogenide glasses, which is useful for designing integrated optical applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Brian Topper, Elizabeth M. Tsekrekas, Lucas Greiner, Randall E. Youngman, Efstratios Kamitsos, Doris Moncke
Summary: The structures of glasses in the lithium-bismuth orthoborate composition range show deviation from the short-range order structure of crystalline end-members. The increase in bismuth oxide content leads to an increase in the fraction of tetrahedral boron and a continuous rise in glass transition temperature. However, the glass stability reaches a maximum in the multicomponent glass of x = 40.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Andrew P. Lange, Koroush Sasan, Leonardus Bimo Bayu Aji, Timothy Y. Yee, Jungmin Ha, F. J. Ryerson, Gabriela Remulla, Rebecca Dylla-Spears
Summary: The mass transport mechanisms of Ti and Ge in TiO2:SiO2 and GeO2:SiO2 direct ink write, additively manufactured glasses were studied. Ti was found to transport through solid state interdiffusion between SiO2 and TiO2 precursor particles, while Ge was more mobile. These results are important for the design of index modifying inks in the direct ink write process.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Sung-Hee Hyun, Tae-Min Yeo, Hong-Min Ha, Jung-Wook Cho
Summary: The structure and behavior of mixed alkali aluminoborosilicate glasses were studied using solid-state MAS NMR and Raman spectroscopy. The correlation between Raman peaks and polymerization degree, as well as the relationship between MAS NMR results of network formers and the glass network changes, were revealed. The mixed alkali effect was observed to increase the charge compensation stability between network modifiers and network formers.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Materials Science, Ceramics
Hirokazu Masai, Yasuhiro Fujii, Naoyuki Kitamura, Masato Yamawaki
Summary: This study examines the relationship between the elastic modulus of glasses and structural parameters, including the correlation length of the Boson peak and cavity size, as well as the correlation with the longitudinal and transversal sound velocities and thermal stability parameters. The results show that the glasses in the GeO2-rich region exhibit a plateau behavior in the Boson peak frequencies, indicating a similarity in the rate of change in sound velocity and correlation length.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Justyna Sulowska, Piotr Jelen, Zbigniew Olejniczak, Magdalena Szumera
Summary: The study found that glasses from the SiO2-P2O5-K2O-MgO-SO3 system can contain various reduced forms of sulfur, with MAS NMR spectra indicating slight polymerization of the silico-oxygen and phospho-oxygen subnetworks.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Lyubov A. Nevolina, Mikhail V. Shtenberg, Dmitry A. Zherebtsov, Olga N. Koroleva
Summary: The stability and crystallizability of K2O-B2O3-GeO2 and K2O-B2O3-SiO2 glasses are important considerations for optical purposes and the immobilization of radioactive wastes. Experimental results show that glasses with B2O3/SiO2 = 2/5 and B2O3/GeO2 = 4/3 ratios exhibit the highest resistance to heating. The crystallization products and structural differences between the borosilicate and borogermanate systems are attributed to the presence of germanium and its ability to form highly oriented structural units.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Nicolas Bisbrouck, Marco Bertani, Frederic Angeli, Thibault Charpentier, Dominique de Ligny, Jean-Marc Delaye, Stephane Gin, Matthieu Micoulaut
Summary: The study examined the structural changes of magnesium-containing aluminoborosilicate glasses, showing that the addition of magnesium increased the proportion of tri-coordinated boron, leading to the formation of different polymerization subnetworks and promoting the formation of high-coordination aluminum sites. Magnesium may play an intermediate role in these glasses.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Parker T. Freudenberger, Rebekah L. Blatt, Randall E. Youngman, Richard K. Brow
Summary: The structural changes of borophosphate glasses with different compositions were investigated using NMR, Raman spectroscopy, and HPLC. The replacement of P2O5 by B2O3 led to the formation of tetrahedral borate sites linked to four phosphate anions and a decrease in the average size of phosphate anions. Further increases in B2O3 content resulted in the replacement of phosphate units linked to the boron tetrahedra by borate units. The changes in the glass transition temperature and molar volume of the glasses can be explained by considering the number and types of bridging oxygens per glass former.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Kowsik Ghosh, M. Mangir Murshed, Michael Fischer, Thorsten M. Gesing
Summary: Mullite-type RAlGeO5 phases exhibit interesting structural, spectroscopic, and thermal properties, including rare inversion of Al/Ge between coordination sites. They are high bandgap semiconductors with a high decomposition temperature.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Deniz Bozoglu, Sahin Yakut, Kemal Ulutas, Deniz Deger
Summary: Thin film polyethylene oxide, produced by the thermal evaporation technique, exhibits structural and property differences compared to bulk polyethylene oxide. The dielectric constant of polyethylene oxide thin film is 10 times greater than that of bulk polyethylene oxide. There is consistency among dielectric constants, activation energies, and free volume fractions for both thin film and bulk samples. Polyethylene oxide thin film is observed to be more brittle than bulk polyethylene oxide.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Xiaozhen Fan, Zhuo Wang, Zheng Fang, Huiqun Ye, Jinju Zheng, Jianqiang Zhang, Yanjun Qin, Yao Zhai, Yanlong Miao, Zixiang Zhao, Can Yang, Jiajun He, Zhenghang Wei, Yunzhang Fang
Summary: The microscopic strain evolution and microstructural of FeCuNbSiB amorphous alloy samples were studied under both free and tensile stress annealing conditions. It was found that an amorphous-nanocrystalline structure was developed in both samples after annealing at 813 K, and the size of nanocrystals was limited by the applied stress.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Atsushi Tanaka, Atsuki Saito, Takashi Murata, Ayako Nakata, Tsuyoshi Miyazaki
Summary: Although molecular dynamics (MD) simulation is a powerful tool for investigating the atomic-scale structures of complex materials, its reliable and accurate application to multi-component glass systems faces challenges due to limited force fields (FFs) and the complexity of chemical environments. This study demonstrates the feasibility of efficient and accurate large-scale density functional theory (DFT) calculations for multi-component glass systems. The evaluation of classical FFs based on the results of large-scale DFT calculations reveals low accuracy for non-bridging oxygen atoms, and differences in Si-O-Si angle distribution and electronic structure for X = Mg.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Petr Shvets, Ksenia Maksimova, Aleksandr Goikhman
Summary: In this study, vanadium oxide xerogel samples were successfully synthesized through a liquid phase reaction and the interaction of films with water. The samples were thoroughly analyzed using X-ray diffraction and Raman spectroscopy, revealing the existence of two distinct phases. It was also discovered that previous misinterpretations regarding the high-pressure polymorph structure were due to the formation of a high-temperature phase. These findings highlight the potential for further refining and expanding the current structural models of vanadium oxide xerogel in future research efforts.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Yiran Zhang, Jing Pang, Qingchun Xiang, Dong Yang, Yinglei Ren, Xiaoyu Li, Keqiang Qiu
Summary: The effect of the volume fraction of body-centered cubic (BCC) crystal on the room temperature brittleness of Fe-based amorphous nanocrystalline alloys was investigated. Molecular dynamics simulations were conducted to obtain seven model samples with different embedded BCC nanocrystal contents. The results showed a gradient decrease in the plasticity of the alloys with different nanocrystal contents.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Moustafa Sahnoune Chaouche, Hani K. Al-Mohair, Shavan Askar, Barno Sayfutdinovna Abdullaeva, Naseer Ali Hussien, Ahmed Hussien Alawadi
Summary: In this work, a novel micromechanical data-driven machine learning framework was proposed to characterize material parameters in bulk metallic glasses. The framework utilized nanoindentation simulations with Berkovich and spherical tips to compile a vast collection of data on material behavior in BMGs. The developed machine learning model efficiently predicted critical material properties and highlighted the importance of input feature weight functions.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Louisiane Verger, Vinuyan Ganesaratnam, Virginie Nazabal, Sebastien Chenu, Christophe Calers, David Le Coq, Laurent Calvez, Olivier Hernandez, Xiang-Hua Zhang
Summary: Crystallization in Ga, Sb, and Se glasses was studied, and a correlation between Se content, crystalline phases, and electrical conductivity was observed. The resulting glass-ceramics exhibited significantly higher conductivity compared to other Se-based glass-ceramics.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Seong-Sik Shin, Ga-Yeong Kim, Byeonggwan Lee, Jae-Hwan Yang, Yeon-Su Son, Jung-Hoon Choi, Jae-Young Pyo, Ki Rak Lee, Hwan-Seo Park, Hyun Woo Kang
Summary: In this study, silver tungstate-tellurite glass with different loading of AgI was developed for immobilization of radioactive iodine. The effects of increasing the amount of AgI on the glass matrix were investigated. The leaching properties of all samples were evaluated, and it was found that the release of all elements satisfied the US regulation.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Chunghee Nam
Summary: This study demonstrates the prediction performance of a CNN regression model for the magnetic entropy changes and transition temperatures of bulk metallic glasses with magnetocaloric effects. The model achieved high prediction performance, as measured by the determination coefficient and root mean square error. The results showed good agreement with experimental values and reported results.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
A. Hosny, Y. M. Moustafa, G. El-Damrawi
Summary: In this study, crystalline glass ceramics were obtained directly from glasses using an ion exchange process between lead bromide and oxygen ions. The addition of lead bromide caused significant changes in the glass structure and the formation of specific crystalline phases.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Luana Cristina Feitosa Alves, Jheimison Ferreira Gomes, Natacya Fontes Dantas, Maria Nayane Queiroz, Pablo Nabuco Portes, Francielle Sato, Nilma de Souza Fernandes, Karina Miyuki, Celso Vataru Nakamura, Alysson Steimacher, Franciana Pedrochi
Summary: This study evaluated the influence of CaF2 addition on the bioactivity of the samples. The results showed that the samples exhibited good bioactivity and cytocompatibility, making them suitable for biomedical applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
N. Keninger, S. Feller
Summary: The principles of Topological Constraint Theory (TCT) were used to study alkali borate and silicate glass systems. Structural models were developed based on experimental data and used to predict properties of the glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Hao Wang, Chengliang Zhao, Chuntao Chang, Shengli Zhu, Zhankui Zhao
Summary: The relationship between the heterogeneous structure and structural relaxation in metallic glasses was explored by investigating the quasielastic and viscoelastic behavior of a Zr55Cu30Ni5Al10 metallic glass. Stress-annealing treatment was used to retain elastic strain energy, and a unique creep recovery phenomenon was observed during the reheating process. The Maxwell model was employed to qualitatively describe the mechanisms of elastic strain energy retention and release.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Sihyung Lee, Giyeol Han, Karuppasamy Pandian Marimuthu, Hyungyil Lee
Summary: This study presents a method for extracting FVM parameters of Zr-based TFMG using MD and FEA, and validates the method through simulation and experiments.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)
Article
Materials Science, Ceramics
Nedra Saad, Mohamed Haouari, Mayssa Ibrahim, Noura Amamou
Summary: In this work, we investigated the optical properties of a fluorophosphate glass system doped with Tb3+ and Eu3+ ions. We found that the emitted light can be tuned by changing the doping concentration, excitation wavelength, or excitation power, which is important for the design of solid-state lighting sources.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2024)