Article
Materials Science, Ceramics
Anwar Hushur, Murli H. Manghnani, Quentin Williams
Summary: The sound velocities of Na2FeSi3O8.5 glass were measured up to 12 GPa using Brillouin spectroscopy. The Poisson's ratio, bulk, shear, and Young's moduli were calculated under different pressures. The shear and Young's moduli and Poisson's ratio exhibited a shift in response to compression at around 2.2 GPa, indicating a pressure-induced shear velocity minimum in the glass. Raman spectra were also obtained up to 6.5 GPa. A relationship between the magnitude of shear velocity depression and the ratio of network-modifying cations to network-forming cations was proposed, suggesting the potential for tailored pressure dependence of elastic velocities in silicate glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
J-M Delaye, A. Le Gac, S. Macaluso, F. Angeli, F. Lodesani, T. Charpentier, S. Peuget
Summary: The study focused on structural modifications in alumino-silicate glasses as CaO replaces Na2O and Al2O3 replaces SiO2, as well as the impact of increasing Al2O3 content. Results showed that Al is always 4-coordinated, and the number of Al-O-Al bonds increases with higher Al2O3 or CaO content. The study also confirmed the attribution of Raman bands to specific bonding configurations, and demonstrated the effectiveness of classical molecular dynamics potentials in replicating experimental results.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
J. -M. Delaye, A. Le Gac, S. Macaluso, F. Angeli, F. Lodesani, T. Charpentier, S. Peuget
Summary: A set of SiO2-Al2O3-Na2O-CaO glasses with varying Si/Al and Na/Ca ratios was experimentally irradiated with Au4+ ions at 7.3MeV. Depending on the glass composition, the density could increase or decrease. Through simulations and experimental comparisons, a phenomenological density change model was proposed to explain the observations.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Henning Hoellwarth, Stephan A. H. Sander, Matthias Werner, Sindy Fuhrmann, Bjoern Sprungk
Summary: Simulating the phenomenon of spinodal decomposition in glasses and polymers has become popular, but simulation models are affected by uncertainties. This study quantifies the consequences of such uncertainties in the phase separation modeling of Na2O-SiO2 glass and finds that thermodynamic quantities are less impacted by random perturbations than kinetic quantities.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Geochemistry & Geophysics
Zachary M. M. Geballe, Sarah M. M. Arveson, Sergio Speziale, Raymond Jeanloz
Summary: Brillouin spectroscopy reveals that the elasticity and refractive index of amorphous CaSiO3 are almost the same under pressures up to 40 GPa, regardless of the synthesis method. The observed changes in refractive index suggest a continuous and reversible change in atomic packing induced by pressure. The hysteresis effect during pressure cycling is small compared to the changes in wave velocities.
AMERICAN MINERALOGIST
(2022)
Article
Materials Science, Ceramics
L. T. San, N. Yen, N. T. Thao, P. K. Hung, Fumiya Noritake
Summary: Molecular dynamics simulations were used to investigate the dynamics and structure of sodium silicate glasses. It was found that Na atoms diffused quickly in NBFx polyhedrons, and predominantly moved through connection lines between these polyhedrons.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
M. Monisha, M. S. Murari, M. Sayyed, Hanan Al-Ghamdi, Aljawhara H. Almuqrin, G. Lakshminarayana, Sudha D. Kamath
Summary: In this study, the thermal, structural, and optical behavior of glasses doped with different concentrations of Eu2O3 ions were reported. Various techniques such as differential thermal analysis, FTIR, and absorption spectra were used to study the properties of the glasses, revealing that an increase in Eu3+ concentration can enhance the lifetime and red emission of the glasses.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
N. T. Thao, P. H. Kien, N. Yen, P. K. Hung, Fumiya Noritake
Summary: In this study, molecular dynamics simulation was used to investigate the diffusion in sodium silicate glasses under different temperatures. The results showed that the glasses consisted of a static network region and a dynamic Na-polyhedron region. Na atoms were found to reside in a small part of the Na-polyhedron region and frequently moved through pathways consisting of polyhedrons with high local sodium density.
MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
(2023)
Article
Optics
Heng Yao, Qiong Xie, Maxime Cavillon, Daniel R. Neuville, Diego Pugliese, Davide Janner, Ye Dai, Bertrand Poumellec, Matthieu Lancry
Summary: Self-assembled nanogratings formed by femtosecond laser writing in multicomponent alkali and alkaline earth containing alumino-borosilicate glasses were studied. The existence of nanogratings was investigated by varying laser parameters including pulse duration, energy, and polarization. Form birefringence, characteristic of nanogratings, was observed through retardance measurements. Glass composition was found to significantly impact the formation of nanogratings, with the Type II processing window decreasing as certain ratios increase. The ability to form nanogratings and its dependence on temperature were interpreted from a glass viscosity viewpoint.
Article
Materials Science, Ceramics
William C. Lepry, Gabriele Griffanti, Showan N. Nazhat
Summary: This study investigated the impact of magnesium content on the structural, textural, and bioactive properties of sol-gel derived borate glass formulations. Results showed that magnesium content up to 10 mol% contributed to high bioactivity, forming hydroxycarbonated apatite within 2 hours in simulated body fluid. However, glasses with over 20 mol% magnesium exhibited reduced specific surface area, pore volume, and bioactive properties. Additionally, viability levels of pre-osteoblastic cells remained similar when magnesium content ranged from 5 to 10 mol%, but increased mortality was observed with magnesium content from 20 to 40 mol%.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Construction & Building Technology
Yitian Xu, Tao Wei, Guoqing Chen, Jingen Ma, Ming Yan
Summary: This paper investigates the mechanism and characteristics of water glass curing sandy soil at different temperatures. The results show that the effect of high temperature on the gel layer is stronger than at room temperature, and the longer the room temperature curing time, the weaker the effect of high temperature on the specimen. After high-temperature curing, the strength of the specimens significantly increases, and the growth rate and deterioration rate of the strength also increase significantly.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Wenke Li, Xiujian Zhao, Chao Liu, Francois-Xavier Coudert
Summary: This study characterized and analyzed the electronic structure of CdSe quantum dots doped in glass matrices, revealing the significant impact of the glass composition on the atomic structure of quantum dots and luminescence mechanisms. The results showed that the glass composition directly affects the nature of the highest occupied molecular orbitals (HOMO) and introducing CdSe quantum dots decreased the HOMO-LUMO gap of the glass.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Michele Cassetta, Danilo Di Genova, Marco Zanatta, Tiziana Boffa Ballaran, Alexander Kurnosov, Marco Giarola, Gino Mariotto
Summary: By analyzing the vibrational properties of parental glasses, this study proposes a new method for estimating the viscosity of volcanic melts without being affected by crystallization of the melt phase. The results show that the ratio between bulk and shear moduli and the boson peak position can accurately reveal the fragility of melts, providing a reliable way to estimate volcanic melt viscosity under eruptive conditions. These findings could contribute to the development of new studies on the nanoscale dynamics of natural melts and their impact on volcanic eruption styles.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Composites
Taineng Zhou, Bo Jin, Wei Liu, Le Yang, Tuanhui Jiang, Xiangbu Zeng, Faguo Shi, Kuanchun Shen, Chun Zhang, Li He
Summary: In this study, a new and simple negative pressure foaming method was innovatively designed to prepare epoxy resin composite foam (ERCF) using inorganically modified calcium silicate (MCS) particles as air carriers. By adjusting the negative pressure value in a vacuum oven, the density and expansion ratio of ERCF could be precisely controlled. The results showed that the ERCF prepared by this method had a low density and better compressive strength compared to other epoxy foams of similar density.
POLYMER COMPOSITES
(2023)
Article
Construction & Building Technology
Laura Diaz Caselles, Bastien Balsamo, Virginie Benavent, Vincent Trincal, Hugo Lahalle, Cedric Patapy, Valerie Montouillout, Martin Cyr
Summary: This paper investigates the behavior and degradation mechanisms of four different calcined clay-based geopolymers under sulfuric acid attack. It explores the potential of meta-illite based geopolymers, which have not been addressed in previous studies, for improving the durability of materials in aggressive environments. The results suggest that all pastes experienced some level of leaching of alkali cations, leading to a disequilibrium of the geopolymer network.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Materials Science, Ceramics
F. Z. Agti, M. T. Soltani, L. F. Santos, A. Messaoudi, N. Guesmia, D. D. Ligny
Summary: New glasses with varying compositions were prepared using melt quenching technique, with properties such as thermal stability and refractive index improving upon insertion of WO3. The glasses studied have the potential to be candidates for optical devices.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Physical
Mariana M. Timm, Lucien Saviot, Aurelien Crut, Nicholas Blanchard, Lucian Roiban, Karine Masenelli-Varlot, Lucile Joly-Pottuz, Jeremie Margueritat
Summary: This paper presents the use of optical spectroscopy techniques to study the vibrational modes of single gold nanocrystals and their interactions with light. The results show that nanoparticle crystallinity has a significant impact on inelastic scattering spectra, and slight shape and environment effects can also modify the spectra.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Neamul H. Khansur, Udo R. Eckstein, Michael Bergler, Alexander Martin, Ke Wang, Jing-Feng Li, Maria Rita Cicconi, Keiichi Hatano, Ken-ichi Kakimoto, Dominique de Ligny, Kyle G. Webber
Summary: This study investigated the influence of mechanical and thermal fields on the structure phase transitions in lead-free Li-modified Na0.5K0.5NbO3 ferroelectrics. A stress-temperature phase diagram was established, and the correlation between vibrational modes changes and phase transition stages was found. The measurement method used in this study can be applied to research on the influence of mechanical fields on local structure in other functional ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Optics
L. H. C. Andrade, S. M. Lima, R. A. Silva, M. R. Devecchi, J. C. S. Moraes, D. de Ligny, L. A. O. Nunes
Summary: For the first time, Eu2O3-doped lithium tellurite (TL) glasses were synthesized under vacuum conditions. The structural and optical spectroscopic properties were discussed. The investigation showed that the Eu3+-doped TL-vac glasses prepared under vacuum had low OH- concentration, resulting in increased transparency in the visible spectral range and mid-infrared spectral region. Luminescence spectra exhibited emission bands from various energy levels, and time-resolved luminescence experiments revealed energy relaxation and migration among different energy levels due to Eu3+ ions pairs. Judd-Ofelt analysis of the emission spectrum indicated that Eu3+ in TL-vac glass had less covalent characteristics compared to other tellurite glasses, with a quantum efficiency of 51% for the 5D0 energy level. These results suggest that TL-vac glass doped with rare earths has potential for new optical devices.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
M. R. Cicconi, R. Belli, M. Brehl, J. Lubauer, T. Hayakawa, K. Kimura, T. Hirota, K. Usui, S. Kohara, Y. Onodera, U. Lohbauer, K. Hayashi, D. de Ligny
Summary: The influence of time and temperature on phase stabilisation, crystal phases evolution, and physical properties of lithium-silicate were studied. The effect of nucleation temperature on mineral assemblage and fracture toughness was observed through reverse-engineering a commercial material. The spatial distribution of structural units influenced the final properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Physics, Multidisciplinary
Ferdinand Werr, Urs Eppelt, Ludger Muellers, Dominique de Ligny
Summary: Utilizing ultra-short-pulse laser filamentation of glass is a new technique for glass cutting, which has the advantages of small heat-affected zone and quasi-non-gap cut. However, the cleaving process and underlying mechanisms are still not well understood. In this study, a specially designed optic was used to generate laser filamentation in different types of glass, and the filaments and cut edge were analyzed. Based on the observations, models were proposed to describe the micro crack formation caused by laser pulses.
FRONTIERS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Nesrine Guesmia, Majda Hamzaoui, Lina Beghdadi, M. T. Soltani, D. de Ligny
Summary: In this study, the thermal, physical, mechanical, and structural properties of the new series of SWN glasses were examined. It was found that the addition of NaPO3 content could increase the stiffness of the glass system, as well as the glass transition temperature and elasticity modulus.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Patrick Duchstein, Philipp Schodder, Simon Leupold, Thi Q. N. Dao, Shifi Kababya, Maria R. Cicconi, Dominique de Ligny, Vitaliy Pipich, David Eike, Asher Schmidt, Dirk Zahn, Stephan E. Wolf
Summary: This study reveals the molecular mechanisms by which small-molecular-weight additives impact amorphous calcium carbonate (ACC), stabilizing its structure and preventing crystallization through interactions with prenucleation clusters (PNCs). These findings are significant for understanding the role of small-MW molecules in crystallization and biomineralization, and provide a theoretical basis for the development of new sustainable antiscalants.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Multidisciplinary
Udo Eckstein, Neamul H. Khansur, Michael Bergler, Daisuke Urushihara, Toru Asaka, Ken-ichi Kakimoto, Matej Sadl, Mirela Dragomir, Hana Ursic, Dominique de Ligny, Kyle G. Webber
Summary: The room temperature aerosol deposition method shows great potential for the rapid deposition of ceramic thick films. However, challenges remain in terms of electrical conductivity and internal stresses in as-deposited films. In this study, a novel technique using a sacrificial water-soluble buffer layer was employed to fabricate freestanding ceramic thick films, allowing for direct observation of the film's properties. The temperature-dependent chemical and structural relaxation phenomena in freestanding BaTiO3 films were investigated, revealing the influence of lattice defects and introducing insight into the origin of high room temperature conductivity in as-deposited films.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Alexander Martin, Martin Brehl, Neamul H. Khansur, Ferdinand Werr, Dominique de Ligny, Kyle G. Webber
Summary: In this study, in situ stress-dependent Raman and Brillouin spectroscopy were used to investigate the polycrystalline NBT-7BT. The results revealed stress-dependent changes in elastic properties and the appearance of a transversal acoustic wave mode, which were similar to the changes in crystallographic structure and ferroelectric order.
Article
Materials Science, Multidisciplinary
Ahmed Gadelmawla, David Dobesh, Udo Eckstein, Oliver Gruebl, Matthias Ehmke, Maria Rita Cicconi, Neamul H. Khansur, Dominique de Ligny, Kyle G. Webber
Summary: The influence of stress on the phase boundaries and dielectric response of lead-free perovskite ceramics was investigated. The results showed that the phase transition temperatures increased and the dielectric and piezoelectric responses decreased with increasing stress. Additionally, applying stress at certain temperatures could enhance the dielectric properties of the ceramics.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Materials Science, Ceramics
Larissa Wahl, Maria Rita Cicconi, Michelle Weichelt, Dominique de Ligny, Nahum Travitzky
Summary: Raman investigations were performed to estimate the residual stresses in layered composites, and it was found that there were differences in stresses among different layers. By adjusting the paste composition, crack-free layered composites were successfully obtained.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Thilo Grammes, Dominique de Ligny, Franziska Scheffler, Alina Nizamutdinova, Leo van Wuellen, Efstratios I. Kamitsos, Jonathan Massera, Delia S. Brauer
Summary: The structure of metaluminous aluminosilicate glasses in the SiO2-Al2O3-Na2O-P2O5 system was investigated, revealing the incorporation of phosphate into the network structure. Changes in phosphate content resulted in depolymerization of the network structure, while increasing silica content had a minimal effect on network polymerization. These changes correlated with variations in glass transition temperature and spectroscopic properties.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Multidisciplinary
Eduardo Hernando Abad, Frederic Bouyer, Laroussi Chaabane, Alan Zerrouki, Jeremie Margueritat, Lucien Saviot
Summary: The vibrational dynamics in the sub-THz range of mesoporous silica nanoparticles with ordered cylindrical mesopores were studied. The structure of MCM-41 and SBA-15 particles was determined using SEM, XRD, N2 physisorption, and Raman scattering. The stiffness of the silica walls (speed of sound) was determined using Brillouin scattering measurements and finite element calculations, and the relevance of this approach was discussed based on the comparison with numerical and experimental results and previous works reported in the literature.
Article
Chemistry, Multidisciplinary
Laura Wollesen, Paul-Antoine Douissard, Ingrid C. C. Infante, Jeremie Margueritat, Brice Gautier, Thierry Martin, Christophe Dujardin
Summary: Ferroelectric epitaxial films of Pb1-xSrx TiO3 (PST) with different Sr compositions have been successfully grown by liquid phase epitaxy (LPE). Structural and spectroscopic investigations reveal that the PST films possess a tetragonal structure and decrease in tetragonality and Curie temperature with increasing Sr-content. Piezoresponse force microscopy shows that films with higher Sr content have different polar domain configurations. Overall, this work demonstrates the control of tetragonal ferroelectric PST film growth and the tuning of nanoscale polarization landscape.
