Article
Materials Science, Ceramics
B. M. G. Melo, D. Blaskova-Kochnitcharova, S. Soreto Teixeira, E. Lefterova, P. Petkov, T. Petkova, L. C. Costa
Summary: Bulk samples of the ternary TiO2-V2O5-P2O5 system were synthesized using the melt-quenching technique. The structure and composition were identified using X-ray diffraction and scanning electron microscopy, with dielectric properties measured using impedance spectroscopy. Analysis of impedance spectra indicated a grain conductivity of 10-1 S/m at 190 degrees Celsius for the NASICON sample.
CERAMICS INTERNATIONAL
(2021)
Review
Materials Science, Ceramics
Hyunseok Song, J. Pundareekam Goud, Jiwon Ye, Wonsik Jung, Jaehoon Ji, Jungho Ryu
Summary: Atomic defects, especially oxygen vacancies, play a critical role in understanding the deterioration of electrical properties in dielectric materials. The thermally stimulated depolarization current (TSDC) technique is widely used for investigating the behavior and characteristics of atomic defects. By analyzing TSDC results, such as peak temperature (Tm), peak current density (Jm), and activation energy (Ea), the relaxation type and defect concentration in dielectrics can be determined. This review provides an overview of the TSDC technique, including its fundamental theory, characterizing procedures, analytical methods, and applications to different dielectric systems.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Pu Mao, Jiping Wang, Peng Xiao, Lixue Zhang, Fang Kang, Hao Gong
Summary: This study developed a novel system of isovalent Zr4+ and donor Nb5+ co-doped CaCu3Ti4O12 (CCTO) ceramics to enhance dielectric response. The co-doping of Zr4+ and Nb5+ ions significantly reduced grain size and improved dielectric constant, leading to giant dielectric response within broader frequency and temperature ranges. The enhanced dielectric response is primarily attributed to the complex defect dipoles associated with oxygen vacancies by co-doping Zr4+ and Nb5+ ions into CCTO structure.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
S. J. Sondarva, D. V. Shah
Summary: This study synthesized polycrystalline Mn3-xCrxTeO6 (MCTO) compounds using the SSR method and investigated the non-Debye relaxation mechanism and correlated barrier hopping mechanism in Cr-doped MCTO compounds, laying the foundation for their applications in the field of multiferroics.
SOLID STATE SCIENCES
(2022)
Article
Materials Science, Ceramics
Sushmita Dwivedi, Manish Badole, Hari Narayanan Vasavan, Sunil Kumar
Summary: The electrical conduction behavior of lead-free BiZnNbO ceramics annealed in different atmospheres was studied, with the sample annealed in oxygen environment showing the lowest conductivity due to reduced oxygen vacancy defects. An anomaly observed at 250 degrees Celsius in dielectric plots for certain samples was attributed to defect relaxation.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
S. J. Sondarva, D. Shah
Summary: In this study, the complex oxide Mn3TeO6 (MTO) compound was synthesized using solid-state reaction method at high processing temperature. The material was characterized in terms of structure, morphology, and electrical properties. The dielectric constant and conductivity of the compound were found to increase with temperature, indicating a correlated barrier hopping mechanism responsible for conduction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
Herminio P. Diogo, Joaquim J. Moura Ramos
Summary: This study investigates the molecular mobility of poly (ether imide) across a wide temperature range using thermostimulated depolarization currents, covering the amorphous solid state, glass transition, and rubber state. Through analyzing different motional modes of the PEI glass transition, a comprehensive view of physical aging process was achieved. Additionally, a new mobility mode was identified below T-g and space charge motions were found in the rubber state.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Environmental Sciences
Rajesh Rohilla, Satish Khasa, Ashima Hooda
Summary: Glass-ceramics with novel composition have been synthesized using melt quench technique, and their dielectric and electrical properties have been characterized. The results indicate that these glass-ceramics show promising potential as eco-friendly and safe dielectric materials.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Ceramics
Ekaterina Koroleva, Andrey Lipovskii, Svetlana Petrunenkova, Dmitry Tagantsev, Sergey Vakhrushev
Summary: The study focused on the dielectric response and effect of heat treatment on the properties of a potassium-sodium-niobium-silicate glass with a high niobium content. Heat treatment resulted in the formation of sodium niobate nanocrystals, leading to improved dielectric performance. The crystallization process occurred in two stages, with anisotropic nanocrystals and no new nuclei during crystallization.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Seema Thakur, Vanita Thakur, Rajesh Punia, Sajjan Dahiya, Lakhwant Singh
Summary: The dielectric permittivity and tan delta of BaTiO3-modified bismuth borate glass-ceramics have been observed to increase with temperature and BaTiO3 content. The presence of grain boundary contributions is confirmed by a sharp and intense peak in Z. The impedance data is analyzed using R-C and R-CPE models, and the experimental data of the imaginary part of the electric modulus is fitted using a theoretical non-exponential Kohlrausch-Williams-Watts (KWW) function. The activation energy values obtained from impedance and electric modulus are in agreement and increase with BaTiO3 content. The stretched coefficient (beta) is found to be temperature and composition-dependent, indicating a purely non-Debye type relaxation nature in the samples.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Ke Meng, Wenhua Li, Xingui Tang, Xiaobin Guo, Qiuxiang Liu, Yanping Jiang
Summary: The research focused on the Sn-doped Ba0.955La0.03Zr0.02Ti0.98O3 ferroelectric ceramics, revealing that their dielectric properties and electrical behavior at high temperatures are influenced by oxygen defects, and partial short-range carrier migration also contributes to their high-temperature dielectric properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Ceramics
Yuan Zhou, Zhixuan Tian, Yanzhi Cai, Chengye Liu, Yifan Li, Xiang Li
Summary: Tm2O3 was introduced into the KNN structure for the first time in this study, and (1-x)K0.5Na0.5Nb0.7Ta0.3O3xTm(2)O(3) (x=0.1-1.0%) powders were synthesized through a solvothermal method. The corresponding ceramics were prepared via atmospheric sintering. The introduction of Tm3+ promoted the refinement of KNN grain and resulted in significant increase in room-temperature dielectric permittivity and relaxation dispersion.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Mohamed Afqir, Mohamed Elaatmani, Abdelouahad Zegzouti, Nabiha Tahiri, Mohamed Daoud
Summary: The bismuth layer ferroelectric materials have been studied for their potential applications in high-temperature piezoelectricity and non-volatile ferroelectric memories. Electrical properties of strontium bismuth niobate ceramics were investigated. The variable range hopping theory was found to be suitable for describing the behavior of the ceramic compound, suggesting the presence of oxygen vacancies acting as polarons. The charge carriers' short-distance mobility caused by the non-Debye process dominantly contributed to the relaxation mechanism.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Hosam M. Gomaa, A. M. Moneep, A. S. Abdel-Moety, A. A. Bendary, I. S. Yahia, Samer H. Zyoud
Summary: This study investigates the impact of substituting Fe2O3 for B2O3 on the structure and electrical properties of lithium vanadate borate glass. Six samples were prepared with varying Fe2O3 content, and their amorphous nature was confirmed by XRD patterns. FTIR analysis showed an increase in BO3 groups and a decrease in BO4 groups. The presence of Fe and V cations in the glass network as formers was also detected. Increasing Fe2O3 content led to higher bulk density, decreased molar volume, and interatomic spacing. The electrical characterization indicated increased conductivity. The conduction mechanism in the glasses was best described by the correlated barrier hopping model. The prepared glasses showed hindered ionic conductivity, making them ideal cathode materials.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Ceramics
Bijaylaxmi Biswal, Dilip Kumar Mishra
Summary: Polycrystalline ceramic specimens of three different alumino-silicate solid solutions have been successfully synthesized by thermal plasma sintering technique. The ceramics consist of mullite and sillimanite phases, and exhibit high density and homogeneous grain distribution. These materials have high dielectric constant and low dissipation factor, with conductivity increasing with temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Hasna Ltaief, Saida Ben Ali, Adel Mahroug, Valeria Ferretti, Manuel Pedro Fernandes Graca, Mohamed Belhouchet
Summary: A new copper compound [H2L]2(CuCl4(H2O)2).2Cl center dot 2H2O [ L = 3,3'- diaminodiphenylsulfone] was synthesized by slow evaporation method and characterized by various techniques. The compound crystallizes in the P-1 triclinic space group and shows a packing pattern with alternating organic and inorganic layers stabilized by hydrogen interactions. The compound exhibits optical absorption bands at 245, 308, and 554 nm, with indirect and direct gap energies of 1.54 and 1.64 eV, respectively. Thermal analysis (TGA and DSC) was also performed.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Chemistry, Physical
Silvia R. Gavinho, Ana Sofia Padua, Isabel Sa-Nogueira, Jorge C. C. Silva, Joao P. Borges, Luis C. C. Costa, Manuel Pedro F. Graca
Summary: Polymeric membranes are commonly used in guided bone regeneration (GBR) in dentistry. The addition of bioactive glasses with therapeutic ions, including zinc, can enhance cell adhesion, proliferation, and differentiation. In this study, bioactive glasses containing different concentrations of zinc were developed, and their structural and biological characteristics were evaluated. The results showed that the zinc-containing bioactive glasses did not exhibit significant antibacterial activity, but the highest concentration of zinc did not compromise bioactivity and promoted cell viability. Cell culture assays using the membranes demonstrated that the addition of zinc improved cell viability and increased alkaline phosphatase production.
Article
Biochemistry & Molecular Biology
Imen Hammami, Silvia Rodrigues Gavinho, Ana Sofia Padua, Maria do Carmo Lanca, Joao Paulo Borges, Jorge Carvalho Silva, Isabel Sa-Nogueira, Suresh Kumar Jakka, Manuel Pedro Fernandes Graca
Summary: In this study, a biomaterial for implant coatings based on 45S5 Bioglass modified with different amounts of niobium pentoxide (Nb2O5) was developed to address the problem of bacterial infection during implant placement. The results showed that the samples loaded with 2 mol% Nb2O5 had the highest bioactivity and greatest antibacterial effect.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Joao Paulo Costa do Nascimento, Felipe Felix do Carmo, Antonio Jefferson Mangueira Sales, Saulo Macedo Maia, Romulo Lopes Frutuoso, Tarique da Silveira Cavalcante, Cleidson Cavalcante, Julio Daniel Siqueira Vieira, Carlos Roberto Ribeiro de Carvalho, Antonio Sergio Bezerra Sombra
Summary: In this study, a patch antenna loaded with sensitive silver film was used to detect high concentrations of oxygen gas. SEM micrographs confirmed the suitability of the porous Ag film for adsorbing O2 gas molecules. Numerical simulation validated the antenna's efficiency. The device showed sensitive response to the presence of oxygen gas, with shifts in resonant frequency as a function of O2 concentration. The patch antenna could potentially be used as a sensor in healthcare monitoring.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Susana Devesa, Filipa Goncalves, Manuel Graca
Summary: Iron niobate (FeNbO4) was prepared using the sol-gel method via two processes: colloidal gel and polymeric gel. Heat treatments at different temperatures were applied to the obtained powders based on differential thermal analysis. The structure and morphology of the samples were characterized using X-ray diffraction and scanning electron microscopy. Dielectric measurements were conducted in the radiofrequency and microwave range, revealing the influence of the preparation method on structural, morphological, and dielectric properties. The polymeric gel method resulted in the formation of monoclinic and orthorhombic iron niobate at lower temperatures, with noticeable differences in morphology and a relaxation mechanism observed in all samples.
Article
Chemistry, Physical
Joao P. F. Carvalho, Tania Vieira, Jorge Carvalho Silva, Paula I. P. Soares, Nuno M. Ferreira, Carlos O. Amorim, Silvia Soreto Teixeira, Manuel P. F. Graca
Summary: In this study, KFeO2 magnetic nanoparticles were synthesized using a proteic sol-gel method and powdered coconut water as a precursor. Scanning electron microscopy revealed micrometric grains. The samples exhibited saturation magnetizations between 15.5 and 24.1 emu/g at 300 K with an applied field of 50 kOe. Cell compatibility assays showed cytotoxicity only in samples treated at 350 degrees C at concentrations up to 5 mg/mL. However, the samples containing KFeO2 displayed good biocompatibility with low specific absorption rates (1.55-5.76 W/g).
Article
Chemistry, Multidisciplinary
Pedro R. Prezas, Manuel J. Soares, Joao P. Borges, Jorge C. Silva, Filipe J. Oliveira, Manuel Pedro F. Graca
Summary: Conventional methods fail to achieve electrical charging of atmospheric plasma spray (APS) hydroxyapatite (Hap) coatings, but a new non-contact, electrode-free method - corona charging achieves this goal. Charged coatings show higher bioactivity compared to non-charged coatings, promoting osteoblastic cell proliferation and increased intake of calcium and phosphorus. The results of this study indicate the promising potential of corona charging in orthopedics and dental implantology.
Article
Crystallography
Marina Vieira Peixoto, Florinda Mendes Costa, Susana Devesa, Manuel Pedro Fernandes Graca
Summary: BiFeO3 fibers were prepared using the Laser Floating Zone (LFZ) technique at different growth speeds. The samples were characterized structurally and morphologically using X-ray diffraction (XRD), Raman spectroscopy, and scanning electron microscopy (SEM), and electrically characterized using impedance spectroscopy. XRD patterns confirmed BiFeO3 as the major phase in all samples. Fibers grown at 10 mm/h showed superior structural and morphological properties. Dielectric characterization revealed a thermally activated relaxation phenomenon in all samples, with a higher dielectric constant observed at a growth pull rate speed of 10 mm/h.
Article
Engineering, Biomedical
Silvia Rodrigues Gavinho, Mehmet Bozdag, Cevriye Kalkandelen, Joana Soares Regadas, Suresh Kumar Jakka, Oguzhan Gunduz, Faik Nuzhet Oktar, Manuel Pedro Fernandes Graca
Summary: Hydroxyapatite was extracted from sheep femur bones and its structural and electrical properties were studied by adding different amounts of magnesium oxide. The results showed that sheep hydroxyapatite is a natural, environmentally friendly, low-cost material with potential applications in regenerative medicine.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2023)
Article
Biochemistry & Molecular Biology
Imen Hammami, Silvia Rodrigues Gavinho, Ana Sofia Padua, Isabel Sa-Nogueira, Jorge Carvalho Silva, Joao Paulo Borges, Manuel Almeida Valente, Manuel Pedro Fernandes Graca
Summary: Implantology is important for oral rehabilitation, and this study aimed to address challenges by developing a biomaterial for dental implant coating based on zirconium-modified 45S5 Bioglass. The incorporation of zirconium enhanced conductivity and showed antibacterial effects, without cytotoxicity, making it a potential coating material for dental implants.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Silvia Rodrigues Gavinho, Ana Sofia Padua, Laura Isabel Vilas Holz, Isabel Sa-Nogueira, Jorge Carvalho Silva, Joao Paulo Borges, Manuel Almeida Valente, Manuel Pedro Fernandes Graca
Summary: In this study, Bioglass 45S5 with added SrO or MgO was developed and its physical and biological properties were evaluated. The results showed that the addition of these ions promoted a slight increase in the number of non-bridging oxygens, decreased cell toxicity of Bioglass 45S5, and enhanced antibacterial effect.
Article
Crystallography
Eduardo da Silva Gomes, Antonia Millena de Oliveira Lima, Silvia Rodrigues Gavinho, Manuel Pedro Fernandes Graca, Susana Devesa, Ana Angelica Mathias Macedo
Summary: Bioceramics, in the form of powder, coatings or prostheses, are widely used in medical and dental areas for repairing and replacing parts of the human body. In this study, hydroxyapatite nanocrystalline powders were synthesized and sintered with a blend of galactomannan and chitosan. The influence of the blend content on the bioceramics was investigated, and it was found that increasing the blend percentage led to an increase in grain size and a decrease in density and hardness of the samples.
Article
Crystallography
Eya Rezgui, Najoua Ouerfelli, S. R. Gavinho, J. P. F. Carvalho, M. P. F. Graca, S. Soreto Teixeira
Summary: The compounds (Na1.5Mn3MnIII)-Mn-II (0.5)(AsO4) (3) and Na1.5MnII Fe-3(III) (0.5)(AsO4) (3) were synthesized via a high-temperature solid-state combustion reaction and characterized. X-ray diffraction measurements showed their monoclinic crystal structures. These compounds have potential applications due to their unique structural and electrical properties.
Article
Engineering, Biomedical
Imen Hammami, Silvia Rodrigues Gavinho, Suresh Kumar Jakka, Manuel Almeida Valente, Manuel Pedro Fernandes Graca, Ana Sofia Padua, Jorge Carvalho Silva, Isabel Sa-Nogueira, Joao Paulo Borges
Summary: This study demonstrates the development of antibacterial materials for implant coatings by incorporating copper into 45S5 Bioglass((R)). By combining the regenerative properties of Bioglass((R)) with the antimicrobial effects of copper, this material has the potential to prevent infections, enhance osseointegration, and improve the long-term success of implants.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(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)
