Article
Materials Science, Multidisciplinary
Alberto Viani, Petra Macova, Konstantinos Sotiriadis
Summary: Magnesium phosphate cements undergo a transformation from amorphous to crystalline during hardening, leading to an increase in porosity. However, the interlocked lath shaped microstructure provides a beneficial effect which outweighs the detrimental role of increased porosity, resulting in an increase in mechanical strength.
Article
Spectroscopy
Magdalena Gaweda, Piotr Jelen, Maciej Bik, Magdalena Szumera, Zbigniew Olejniczak, Maciej Sitarz
Summary: Vibrational spectroscopy is an indispensable tool for examining silicon oxycarbide-based amorphous materials. In this study, SiOC glasses were modified with phosphate ions, and the structural examination was mainly carried out using infrared and Raman spectroscopy. The obtained results proved the efficient preparation of desired materials with structural parameters similar to the unmodified one.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Medicinal
Tyson Chasse, Stephen L. Conway, Gerald D. Danzer, Lili Feng, Anthony M. Leone, Michael McNevin, John Smoliga, Paul A. Stroud, Holger van Lishaut
Summary: The IQ Consortium Working Group on Characterization of Amorphous Solid Dispersions shares their perspective on the analytical challenges and limitations of detecting low levels of crystalline drug substance in ASDs and associated drug products. They aim to guide development, support control strategies, and enable registration of quality products using highly sensitive analytical technologies. The article highlights the unique challenges of monitoring crystalline drug substance and emphasizes the merits and limitations of diverse analytical tools.
JOURNAL OF PHARMACEUTICAL SCIENCES
(2022)
Article
Construction & Building Technology
Konstantinos Sotiriadis, Radoslaw Mroz, Petra Macova, Anton S. Mazur, Andraz Krajnc
Summary: Synthesized cement systems with different C3A/C4AF ratios were tested under long-term humid conditions to assess the changes in crystalline and amorphous phases. The findings indicate that systems with C3A/C4AF < 1 better preserved the integrity of the C-S-H phase and prevented thaumasite formation. Addition of calcite inhibited carbonation reactions.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Construction & Building Technology
Rita Gelli, Monica Tonelli, Francesca Martini, Lucia Calucci, Silvia Borsacchi, Francesca Ridi
Summary: This study explores the concentration dependent retarding effect of borax on tri-magnesium phosphate-based cements for the first time. By investigating the hydration and phases formed in the set cements using multiple characterization techniques, it was found that borax slows down the hydration process, reduces heat release, and leads to the formation of struvite instead of newberyite, without affecting the strength of the cement. The observed boron species suggest that the retardation is caused by the complexation of NH4+ and Mg2+ ions with borate and polyborate anions.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Benedikt Soeldner, Kristof Grohe, Peter Neidig, Jelena Auch, Sebastian Blach, Alexander Klein, Suresh K. Vasa, Lars V. Schaefer, Rasmus Linser
Summary: Understanding macromolecular function, interactions, and stability requires detailed assessment of conformational ensembles. Limited by the qualitative or low abundance of solid-state nuclear magnetic resonance internuclear distance information, accurately elucidating the spatial dynamics of solid proteins at physiological temperatures is challenging. However, this study demonstrates unprecedented access to abundant proton-proton internuclear distances, enabling accurate molecular dynamics simulations and providing atomic-level spatial details of conformational dynamics in various biomolecular systems.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Heng Li, Jianmin Jiao, Wang Xie, Yue Zhao, Chen Lin, Juli Jiang, Leyong Wang
Summary: Single crystal X-ray diffraction is a reliable method for determining molecular structures, but it has limitations with oily organic molecules. A new crystallization chaperone called TMAPA was developed to overcome this limitation and successfully determined the structures of 51 organic guest molecules. The introduction of anthracene moieties in TMAPA allowed for efficient capture of guest molecules. This work opens up new possibilities for identifying and determining the conformation of unknown oily organic molecules.
ACS MATERIALS LETTERS
(2023)
Article
Chemistry, Physical
Shaochun Lv, Tianyu Qu, Hisham Al-Ward, Liting Mu, Hongbin Qiu, Yunlong Zhang
Summary: Bone defects can cause deformities and dysfunctions in the human body. The use of bioactive bone cement for bone regeneration is essential. In this study, bioactive magnesium phosphate bone cement (BMPC) was fabricated and its properties were discussed. The results showed that BMPC had good biocompatibility and degradability, making it a promising orthopedic material.
Article
Construction & Building Technology
Xinzhou Liu, Kai Xiang, Yuanchen Guo, Qing Ye, Jingtao Zhang, Xueke Pei, Xue Wang
Summary: This study investigates the mechanical properties of hybrid fiber-reinforced magnesium phosphate cement-based composite materials (HFRMPC) by incorporating four types of fibers. The impact resistance of the fiber hybridization group was found to be better than that of the single fiber group, with the impact resistance increasing continuously with increasing fiber content. Microscopic structural analysis revealed that the multiscale strengthening and toughening zone composed of fibers with different geometric dimensions and elastic modulus played a crucial role in improving the impact toughness of HFRMPC.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Medicine, Research & Experimental
Jinghan Li, Naga Kiran Duggirala, N. S. Krishna Kumar, Yongchao Su, Raj Suryanarayanan
Summary: In this study, amorphous solid dispersions (ASDs) containing sulfamethoxazole (SMZ) and trimethoprim (TMP) were designed and prepared to enhance the solubility of both drugs. The drug-drug and drug-polymer interactions in the ASDs resulted in highly stable formulations with synchronized release of the two drugs.
MOLECULAR PHARMACEUTICS
(2022)
Article
Chemistry, Physical
Rita Gelli, Francesca Martini, Marco Geppi, Silvia Borsacchi, Francesca Ridi, Piero Baglioni
Summary: The study demonstrates that AMCPs can form in the presence of mucin, with the glycoprotein efficiently incorporated in the amorphous particles. Solid State NMR investigation reveals interactions between AMCPs and mucin, affecting the features of the glycoprotein.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Construction & Building Technology
Wenqiang Ruan, Fengheng Li, Jianguo Liao, Xinqi Gu, Jiajia Mo, Yuanyuan Shen, Yu Zhu, Xiaoe Ma
Summary: This study investigates the effects of water purifying material waste (WP) as a mineral admixture on the properties of magnesium phosphate cement-based grouting materials (MPCG). The results demonstrate that WP can improve the fluidity, mechanical properties, and water resistance of MPCG. Furthermore, WP delays the early hydration reaction and enhances the microstructure density of MPCG. These findings are significant for the application of grouting materials.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Hao Tang, Jueshi Qian, Jihui Qin, Zhen Li, Xingwen Jia, Yanfei Yue, Fumin Dai
Summary: The electrochemical behaviors of steel bars in magnesium phosphate cement (MPC) were studied, and it was found that the steel bars in the simulated MPC pore solution could effectively passivate, forming films mainly composed of FePO4. Compared to traditional cement materials, MPC exhibited superior corrosion protection due to the continuous precipitation of phosphates and accumulation of passive films. After depassivation of steel bars, MPC showed self-healing corrosion behavior characterized by dramatic recovery of passive film resistance and charge transfer resistance. Corroded steel bars in MPC with a low magnesia-to-phosphate ratio could re-passivate and stabilize for long periods of time.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Construction & Building Technology
Shanliang Ma, Zengqi Zhang, Xiaoming Liu, Fanghui Han
Summary: The in-situ characterization of the rapid early reaction of magnesium potassium phosphate cement (MKPC) via common methods is difficult. This study utilized low field nuclear magnetic resonance (LF-NMR) for in-situ monitoring the reaction degree of MgO in MKPC. Compared with XRD-Rietveld, BSE image analysis, and TG analysis methods, LF-NMR proved to be a correct and effective method for the rapid and accurate characterization of the reaction kinetics of MKPC. The obtained insitu kinetic data contributed to the simulation of MKPC's porosity development and established a strong relationship between calculated porosity and compressive strength, which can be used for further performance prediction.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Francesco Panattoni, Jonathan Mitchell, Edmund J. Fordham, Ravinath Kausik, Clare P. Grey, Pieter C. M. M. Magusin
Summary: The study utilized high-field, solid-state NMR methods to analyze kerogen isolates of different maturity levels, finding that the aromatic/aliphatic ratio of kerogen increases with maturity. This increase in ratio is reflected in the H-1 MAS NMR spectra by the intensity ratio of aliphatic-to-aromatic signals, suggesting a decrease in kerogen proton density during maturation.
Article
Materials Science, Ceramics
Lucie Zarybnicka, Jana Machotova, Petra Macova, Alberto Viani
Summary: The role of carboxyl functional groups in acrylic latex on fabricating an organic-inorganic composite material based on magnesium phosphate cement was investigated. The acidic nature of the latex aqueous medium enhanced the dissolution of magnesium oxide in the initial stages of the cement reaction. The deprotonation of carboxyl groups due to increased pH promoted surface adsorption effects, which controlled the nucleation and growth of reaction products. The resulting hindering effect slowed down reaction rates, delaying the precipitation of solid phosphates and leading to improved properties of the composite.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Alberto Viani, Petra Macova, Radek Sevcik, Lucie Zarybnicka
Summary: Citric acid enhances the dissolution of MgO and delays the nucleation of phosphates in magnesium phosphate cements. Citrates complex the released Mg2+ ions, reducing the degree of supersaturation. The adsorption of citrate hinders crystal growth and amorphous-to-crystalline transformation.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Pavla Bauerova, Magdalena Kracik-Storkanova, Petra Macova, Pavel Reiterman, Eva Vejmelkova, Martin Keppert
Summary: This paper investigates the possibility of using thermal analysis to estimate the linseed oil content in historic mortar. By studying model mortar samples, a calculation method and mass spectroscopy analysis were proposed to determine the oil content, and it was found that the mass spectroscopy analysis method yielded the most accurate results.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Construction & Building Technology
Lucie Zarybnicka, Jaroslav Pokorny, Jana Machotova, Radek Sevcik, Jiri Sal, Alberto Viani
Summary: New acrylic latex additives with and without keto-hydrazide crosslinking were prepared and incorporated into Portland cement-based mortars. The results showed that the latexes without crosslinking had the highest effect on heat flow evolution. The addition of both latex types increased the open porosity and decreased the mechanical strength of the cement composites, but improved the liquid water transport properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Irina I. Fedorova, Natalia S. Soldatova, Daniil M. Ivanov, Ksenia Nikiforova, Irina S. Aliyarova, Mekhman S. Yusubov, Peter M. Tolstoy, Rosa M. Gomila, Antonio Frontera, Vadim Yu. Kukushkin, Pavel S. Postnikov, Giuseppe Resnati
Summary: This study reports the planarity of the benzothienoiodolium cation and the preorganization it provides for the hydrogen, halogen, and chalcogen bonds formed by the phenyl hydrogen, iodolium iodine, and thienyl sulfur. Crystallographic analysis reveals the coupling of these bonds to a single anion, coordinated via the supramolecular and heteroditopic synthon XB/HB or XB/ChB. The interactions of these synthons act synergistically and result in unusually short chalcogen bonds formed by the thienyl sulfur.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Engineering, Chemical
Daniil Ivanov, Mariya Ekaterincheva, Aleksey Kalashnikov, Ksenya Baca, Anton Mazur
Summary: A new modifier-curing agent MC-4SF has been developed to reduce hot pressing time and formaldehyde emission in plywood and wood boards. Compared to traditional ammonium salts, MC-4SF combines the properties of direct and latent catalysts, resulting in increased hydrolytic stability and reduced toxicity of cured resin. Manufacturing tests have shown that using MC-4SF as a curing agent allows for a significant reduction in pressing time, while improving the line shear strength by 14% and reducing formaldehyde emission by 45%.
PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Ceramics
Davide Bernasconi, Alberto Viani, Lucie Zarybnicka, Petra Macova, Simone Bordignon, Caterina Caviglia, Enrico Destefanis, Roberto Gobetto, Alessandro Pavese
Summary: This study investigates the incorporation of solid waste incineration fly ash into phosphate-based geopolymers as a substitute for metakaolin. Analytical techniques such as X-ray diffraction, scanning electron microscopy, solid-state nuclear magnetic resonance spectroscopy, and infrared spectroscopy were used to analyze the changes in mineralogy and structural modifications of the geopolymer networks, which affected the mechanical performance of the materials. The results show that fly ash behaves differently from metakaolin, primarily acting as an alkali source and competing with the aluminosilicate metakaolin fraction by precipitating crystalline and amorphous phosphates. The substitution of 10% metakaolin with fly ash preserves the amorphous geopolymer matrix and retains the mechanical properties. However, at higher waste content (30-50% wt), the fast acid-base reactions involving the fly ash reactive phases dominate, leading to a shift in the material nature towards an alkali-phosphate cement/phosphate-geopolymer composite. This change, along with the development of porosity and the presence of low-strength phases in the ash, results in a decline in mechanical performance. Overall, this work provides valuable information for the sustainable utilization of phosphate-based geopolymers, while highlighting the recycling potential for this type of fly ash.
CERAMICS INTERNATIONAL
(2023)
Article
Archaeology
Radek Sevcik, Jana Machotova, Lucie Zarybnicka, Petra Macova, Alberto Viani
Summary: This investigation evaluates the use of polyacrylate latex nanodispersions as consolidation agents for sandstones. Four types of latex with different polymer fluorination and crosslinking have been synthesized and tested on Prague sandstone. The consolidated stone samples showed significant improvements in mechanical properties, even with diluted latex nanodispersions, while maintaining comparable moisture transport properties. The flexibility of the chemical properties of these novel nanodispersions allows for customized treatments to preserve cultural heritage objects at risk from climate change.
JOURNAL OF CULTURAL HERITAGE
(2023)
Article
Chemistry, Physical
Marina Konon, Irina G. Polyakova, Anton S. Mazur, Artem S. Saratovskii, Dmitry P. Danilovich, Mikhail Alikin
Summary: This study investigated the crystallization of cristobalite in sodium borosilicate glass with the presence of chromium oxide, finding that chromium oxide can catalyze the crystallization of cristobalite at lower temperatures and concentrations.
Article
Biochemistry & Molecular Biology
Ilya Khodov, Valentina Sobornova, Valeriya Mulloyarova, Konstantin Belov, Alexey Dyshin, Luis Batista de Carvalho, Peter Tolstoy, Michael Kiselev
Summary: This study investigates the impact of mefenamic acid on the physical and chemical properties of silica aerogels, as well as its influence on the sorption characteristics of the composite material. Through solid state magic angle spinning nuclear magnetic resonance (MAS NMR) and high-pressure C-13 NMR kinetic studies, the presence of mefenamic acid was identified and the kinetic rates of CO2 sorption were measured. Additionally, high-pressure T-1-T-2 relaxation-relaxation correlation spectroscopy (RRCOSY) and high-pressure nuclear Overhauser effect spectroscopy (NOESY) studies were conducted to estimate the relative amount of mefenamic acid in the aerogel's pores and investigate its conformational preference when released from the aerogel.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Elena Yu. Tupikina, Vladislav O. Korostelev, Danil V. Krutin, Peter M. Tolstoy
Summary: This study computationally investigated the geometry and IR parameters of arsinic acid (H2AsOOH) and its hydrogen-bonded complexes in different media. The effects of the medium on the complexes were examined both implicitly using the IEFPCM model and explicitly by considering hydrogen-bonded complexes with various hydrogen bond donors or acceptors. The results showed that the transition from vacuum to a polar medium caused changes in the geometry and IR parameters of the complexes, with weak hydrogen bonds becoming weaker and strong and medium hydrogen bonds becoming stronger. The preferential solvation of charge-separated structures was identified as the driving force behind these changes.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
E. R. Chakalov, R. P. Shekurov, V. A. Miluykov, P. M. Tolstoy
Summary: The structure of two intramolecular hydrogen-bonded motifs in ferrocene-1,1'-diyl-bisphosphinic acid has been experimentally revealed using NMR spectroscopy. The study also addressed the localization of bridging hydrons and the origins of opposite signs of H/D isotope effects on P-31 NMR chemical shifts in a cyclic dimer and a homoconjugated anion, utilizing DFT calculations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Crystallography
Alberto Viani, Lucie Zarybnicka, Radek Sevcik, Petra Macova, Jana Machotova
Summary: The mechanisms of how EDTA and NTA sodium salts control the precipitation of struvite-K from solution have been investigated. These additives influence the precipitation process by extending the induction time, reducing the crystallization rate, and decreasing the amount of reaction product.
JOURNAL OF CRYSTAL GROWTH
(2023)
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)