Article
Materials Science, Ceramics
Lina Chen, Tengfei Sun, Zhenbang Hao, Jun Xie, Jihong Zhang, Jianjun Han, Mingzhong Wang, Xiuzhen Cui, Xinhui Liang
Summary: Li2O-MgO-Al2O3-SiO2 glass-ceramics with ultrahigh hardness were prepared by introducing MgO via Li2O substitution. The highest hardness reached 9.34 GPa, much higher than traditional silicate glass-ceramics. Crystal phases and crystal diameters varied with MgO/Li2O ratios and heat-treatment temperatures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Jae-ho Lee, Tae-min Yeo, Jung-Wook Cho
Summary: The effects of Li2O on the crystallization behavior of Cuspidine in CaO-SiO2-CaF2 glass were studied, revealing that Li2O could affect the crystallization rate and nucleation was identified as the limiting step of the crystallization process.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Lifan Zhu, Mingzhong Wang, Yinsheng Xu, Xianghua Zhang, Ping Lu
Summary: This study investigated the effect of ZrO2 on the phase separation and crystallization of Li2O-Al2O3-SiO2-P2O5 glasses. The results showed that ZrO2 increased the crystallization temperature and promoted the separation of phosphate-rich phases. The findings revealed the beneficial role of ZrO2 in activating the nucleation of P2O5.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Tae-min Yeo, Jung-Wook Cho, Ivan Hung, Zhehong Gan, Sabyasachi Sen
Summary: The structure of mold flux glasses with high modifier contents was studied using nuclear magnetic resonance spectroscopy. The results showed that the glasses primarily consist of dimeric units and corner-shared BO3 units. The addition of Li increased the undercooling required for the formation of cuspidine, indicating a frustrated local structure caused by the mixing of alkali ions.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
H. A. Abo-Mosallam, S. Ibrahim, Ebrahim A. Mahdy
Summary: In this study, the authors investigated the effects of composition modification on crystallization characteristics and magnetic behavior by partially introducing NiO into the 23.5Li(2)O-11.5CaO-55SiO(2) eutectic glass system. The addition of NiO improved the density, hardness, and chemical durability of the glass-ceramics, while also significantly enhancing their magnetic properties. These glass-ceramics show great potential in electronic devices, wear-resistance uses, and biomedicine applications.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Ping Lu, Saurabh Kapoor, Libor Kobera, Jiri Brus, Ashutosh Goel
Summary: The article explores the structural dependence of crystallization in Na2O-Al2O3-B2O3-P2O5-SiO2-based glasses and the impact of phosphate at different concentrations on crystallization. Phosphate is found to integrate into the glass network mainly through the formation of Al-O-P and B-O-P linkages.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Mohamed Zekri, Andreas Herrmann, Andreas Erlebach, Kamel Damak, Christian Russel, Marek Sierka, Ramzi Maalej
Summary: Understanding the atomic structure of glasses, especially the local environment of rare-earth ions, is crucial for applications in photonic devices. Molecular dynamics simulations of lithium and potassium aluminosilicate glasses doped with Gd2O3 show that increasing the network modifier oxide to aluminum oxide ratio increases the coordination number of modifier ions and reduces overall network structure stability, while also increasing the fraction of non-bridging oxygen sites around Gd3+ ions. These findings are consistent with experimental results and simulations of similar glasses, indicating a low driving force for Gd3+ clustering.
Article
Materials Science, Ceramics
Xufeng Zhang, Huidan Zeng, Xin Wang, Weichang Li, Lili Hu, Shubin Chen
Summary: The effect of replacing P2O5 with different amounts of TiO2 on the crystallization, structure, and mechanical properties of an MgO-Al2O3-SiO2 system was investigated. The results showed that adding TiO2 favored the precipitation of fine grains and significantly increased the Vickers hardness, Young's modulus, and fracture toughness of the glasses. Introducing an appropriate amount of TiO2 can make a glass structure more compact, promote crystallization, and improve the mechanical properties of MgO-Al2O3-SiO2 glass-ceramics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jinfeng Li, Jianguo Huang, Hao Feng, Xiaoyang Wang, Xiangchun Yin, Yuantao Zhang
Summary: The study characterized the structural changes of SiO2-TiO2-ZrO2-RO-Al2O3 (R=Ca, Sr, Ba) multicomponent glass using various techniques, finding that the substitution of TiO2 increases the density and dielectric constant of the glass, but slightly decreases thermal stability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Maria V. S. Alencar, Glauco V. P. Bezerra, Lais D. Silva, Jose F. Schneider, M. Jesus Pascual, Aluisio A. Cabral
Summary: The study revealed that the presence of TiO2 in the glass caused changes in the structure of boron and silicon, affecting the crystalline properties of the glass. As the TiO2 content increased, the glass stability parameters increased, while the activation energy for crystallization decreased.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Multidisciplinary
H. A. ElBatal, M. A. Azooz, G. T. El-Bassyouni, F. H. ElBatal, E. M. Hamzawy
Summary: The glasses from the ternary system SiO2-Li2O-TiO2 with increasing titania content replacing silica were prepared by melting-annealing technique. The thermal and structural properties of the glasses were evaluated, showing an increase in coefficient of thermal expansion with titania content. X-ray diffraction and SEM investigations revealed the formation of different crystalline phases with increasing TiO2 content, impacting the mechanical properties of the glass.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Ceramics
Marina Konon, Irina Polyakova, Sergey Stolyar, Nikolay Simonenko, Tatiana Simonenko, Nikita Zolotov, Ekaterina Semenova, Tatiana Antropova
Summary: Glasses in the Na2O-B2O3-SiO2-Fe2O3 system with compositions containing 7-12 mol % Fe2O3 and a constant SiO2 concentration of 70 mol % were studied at 550 degrees C. The immiscibility areas and crystallization fields of magnetite and FeSiO3 were outlined, with Fe3+ and Fe2+ ions found to be octahedrally coordinated in the low-alkali region and tetrahedrally and octahedrally coordinated in the higher alkali area. The formation of FeSiO3 in the low-alkali region was attributed to a significant amount of Fe2+.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Weichang Li, Xin Wang, Huiyu Chen, Xufeng Zhang, Lili Hu, Shubin Chen
Summary: The effect of fluorine content on the crystallization, microstructure and mechanical properties of SiO2-Li2O glassceramics was investigated. Lithium disilicate (Li2Si2O5) is the main phase crystallizing during the heat treatment, while lithium metasilicate (Li2SiO3), petalite (LiAlSi4O10), and fluorapatite (Ca5(PO4)3F) appear in some samples as minor phases. The addition of fluorine increases the crystallinity and promotes the formation of Li2Si2O5 and Ca5(PO4)3F crystals, thereby regulating the microstructure and mechanical properties. Proper fluorine content significantly enhances mechanical properties.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Yao He, Xuefeng Shen, Yong Jiang, Anxian Lu
Summary: By replacing Na2O with Li2O in the xLi2O-(5-x)Na2O-20MgO-20Al2O3-54SiO2 system, the crystallization, physical properties, and conductivity of glasses were affected. The main crystalline phase of glass-ceramics is cordierite, and the ionic conductivity is significantly higher.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Svetlana V. Pershina, Tamara A. Kuznetsova, Emma G. Vovkotrub, Semyon A. Belyakov, Elena S. Kuznetsova
Summary: This study investigates the parent glasses for the production of Li1.5+xAl0.5Ge1.5SixP3-xO12 glass-ceramics for rechargeable Li-metal/Li-ion all-solid-state batteries. It is found that Si-doped glasses have lower crystallization activation energy compared to Si-free glasses, enabling the production of glass-ceramics at lower temperatures.
Article
Materials Science, Ceramics
Anuraag Gaddam, Daniela S. Brazete, Ana S. Neto, Bo Nan, Hugo R. Fernandes, Jose M. F. Ferreira
Summary: This study demonstrates the fabrication of YSZ scaffolds with 70% macro porosity using robocasting, with inks containing 48% solids volume fraction proving to be the most reliable. The sintered porous structures showed a high compressive strength of around 236 MPa. After coating with bioactive glass and immersion in simulated body fluid, the scaffold exhibited excellent bioactivity and deposition of hydroxyapatite.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Sultan Khan, Amarnath R. Allu, Anuraag Gaddam, Hugo R. Fernandes, Sutanu Dutta, Partha S. Kongar, Anal Tarafder, Jose M. F. Ferreira, K. Annapurna
Summary: The study demonstrates that using carbonate-free borate minerals as alternatives in glass production can reduce melting temperature and CO2 emissions. This can not only save energy consumption, but also improve the mechanical and thermal properties of the glass.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Ana S. Neto, Patricia Pereira, Ana C. Fonseca, Carla Dias, Mariana C. Almeida, Ines Barros, Catarina O. Miranda, Luis P. de Almeida, Paula V. Morais, Jorge F. J. Coelho, Jose M. F. Ferreira
Summary: The study focused on developing multifunctional biphasic calcium phosphate scaffolds coated with biopolymers loaded with antibiotic drug Rifampicin. The drug release profiles were different between PCL and PEU-coated scaffolds, with PCL showing a faster burst release. The effectiveness of the scaffolds in inhibiting bacterial growth depends on the specific bacterial strain and the type of polymer coating, influencing the drug release behavior.
Article
Chemistry, Physical
T. Tite, A. C. Popa, B. W. Stuart, H. R. Fernandes, I. M. Chirica, G. A. Lungu, D. Macovei, C. Bartha, L. Albulescu, C. Tanase, S. Nita, N. Rusu, D. M. Grant, J. M. F. Ferreira, G. E. Stan
Summary: The incorporation of therapeutic-capable ions into bioactive glasses has potential for bone regeneration. This study assessed the structural and bio-functional roles of CuO and Ga2O3 in SBG and PBG, and revealed the roles of Cu and Ga in the glass networks. The results showed lower ion release of Cu and higher ion release of Ga in SBG, while all glasses exhibited good cytocompatibility and the coupled release of Cu and Ga ions in SBG enhanced antibacterial efficacy.
JOURNAL OF MATERIOMICS
(2022)
Article
Materials Science, Multidisciplinary
Shweta R. Keshri, Indrajeet Mandal, Sudheer Ganisetti, S. Kasimuthumaniyan, Rajesh Kumar, Anuraag Gaddam, Ankita Shelke, Thalasseril G. Ajithkumar, Nitya Nand Gosvami, N. M. Anoop Krishnan, Amarnath R. Allu
Summary: This study improves the crack resistance of glass as a solid electrolyte for sodium-ion batteries through Na+-Ag+ ion exchange while maintaining its ionic conductivity. The study evaluates the structure, crack resistance, and conductivity of the glass using various techniques and concludes through experiments and simulations.
Article
Nanoscience & Nanotechnology
G. Jagannath, Anuraag Gaddam, S. Venugopal Rao, D. A. Agarkov, G. M. Korableva, Manasi Ghosh, Krishna Kishor Dey, Jose M. F. Ferreira, Amarnath R. Allu
Summary: This study demonstrates the optimization of borate structural units in lanthanum borate glasses by adding heavy metal oxides, resulting in an optimum optical threshold value for power optical limiting devices. The structural changes of the glasses and the nonlinear optical attributes were analyzed, indicating that LB glasses containing heavy metal oxides exhibit superior optical limiting performance.
SCRIPTA MATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Bruna L. Correia, Ana T. P. C. Gomes, Rita Noites, Jose M. F. Ferreira, Ana S. Duarte
Summary: Endodontic treatment aims to preserve teeth by removing infected tissue, disinfecting, and filling/sealing the root canal. The removal of microorganisms is crucial to prevent reinfection and tooth loss. Due to drug resistance, alternative procedures are needed. This study suggests using bioactive glass as an intracanal medication, which has been found to inhibit the growth of oral pathogens and greatly impact the success of endodontic treatments.
Article
Materials Science, Multidisciplinary
Henrik Bradtmueller, Anuraag Gaddam, Hellmut Eckert, Edgar D. Zanotto
Summary: The structural rearrangements during relaxation and crystal nucleation in lithium-disilicate glass were investigated using solid-state nuclear magnetic resonance (NMR) experiments and molecular dynamics (MD) simulations. It was found that the change in the local environment of lithium, rather than the network former unit distribution, played a key role in the relaxation and nucleation processes. The crystal nucleation was accompanied by changes in the electric field gradients.
Article
Biochemistry & Molecular Biology
Helena Salgado, Ana T. P. C. Gomes, Ana S. Duarte, Jose M. F. Ferreira, Carlos Fernandes, Maria Helena Figueiral, Pedro Mesquita
Summary: This study tested the antimicrobial activity and surface roughness of a graphene-enhanced dental resin against Candida albicans and Streptococcus mutans. The increase in graphene concentration resulted in increased surface roughness. Graphene was effective in inhibiting the growth and adhesion of C. albicans and S. mutans.
Article
Chemistry, Physical
Liviu Nedelcu, Jose M. F. Ferreira, Adrian-Claudiu Popa, Luminita Amarande, Bo Nan, Liliana-Marinela Balescu, Cezar Dragos Geambasu, Marius-Cristian Cioangher, Lucia Leonat, Mihai Grigoroscuta, Daniel Cristea, Hermine Stroescu, Robert Catalin Ciocoiu, George E. Stan
Summary: This study conducted a comparative analysis of various sintered piezoceramic materials using multi-parametric unitary methods. The aim was to identify the most promising biocompatible piezoelectric material for use in 3D printed macro-porous ceramic scaffolds. The results showed that the BCTZ solid solution had the best combination of functional properties and compatibility with osteoblast cell cultures. Using the selected piezoceramic as a base material, 3D macro-porous scaffolds with promising compressive strength and excellent cell colonization capability were fabricated.
Article
Materials Science, Multidisciplinary
Henrik Bradtmueller, Qiuju Zheng, Anuraag Gaddam, Hellmut Eckert, Edgar D. Zanotto
Summary: This study investigates the structural role of Nb and its impact on covalent/ionic oxide glasses in Nb2O5-containing lithium silicate glasses. Through advanced NMR methods and simulations, it is found that the addition of Nb2O5 leads to network repolymerization and requires a certain amount of Li2O for stability. Significant 7Li-93Nb interactions are also observed. These results suggest that niobium oxide acts as a network former in these glasses.
Review
Materials Science, Ceramics
Dilshat U. Tulyaganov, Konstantinos Dimitriadis, Simeon Agathopoulos, Hugo R. Fernandes
Summary: CaO-MgO-SiO2 system is one of the most promising silicate systems due to its abundance of reagents, easier fabrication, improved performance, and wide range of application. The phase diagram of this system is widely used as a constitutive model for synthesizing glass-ceramic materials with high chemical durability and desirable mechanical and electrical properties. The materials from this system have attracted extra interest for bone tissue repair due to their ability to induce hydroxyapatite formation and controllable degradation rate.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Biomedical
Cristina Besleaga, Bo Nan, Adrian-Claudiu Popa, Liliana Marinela Balescu, Liviu Nedelcu, Ana Sofia Neto, Iuliana Pasuk, Lucia Leonat, Gianina Popescu-Pelin, Jose M. F. Ferreira, George E. Stan
Summary: Bi-phasic calcium phosphates (BCPs) are promising materials for bone graft substitutes. This study investigates the structural role of supplemental cation-doping in BCPs and its influence on biological effects. The results show that double Mg-Sr doping in BCPs leads to the highest β-TCP/hydroxyapatite mass concentration ratio.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(2022)
