Article
Materials Science, Ceramics
E. Roitero, L. Gremillard, V. Garnier, C. Ritzberger, J. Chevalier
Summary: To decrease light scattering caused by birefringence in dental Yttria-Stabilized Zirconia (YSZ), two strategies are followed: increasing Y2O3 content or decreasing grain size. Increasing the stabilizer content enhances translucency and aging resistance, but sacrifices mechanical properties. On the other hand, nanometric-sized YSZ with stabilized tetragonal nano-grains shows high strength, toughness, aging resistance, and translucency. These results highlight the significance of Yttria-containing transformable tetragonal nano-ceramics for dental applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Jaroslav Kastyl, Premysl Stastny, Zdenek Chlup, Lu Song, Erik Scasnovic, Martin Trunec
Summary: In this investigation, dental 3Y-TZP ceramics with excellent strength and enhanced translucency were developed. The applicability and resistance to low-temperature degradation of the new dental ceramics were demonstrated.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Biomedical
Li Wang, Hang Yu, Zongdong Hao, Weizhe Tang, Rui Dou
Summary: This study investigated the potential of 5 mol% yttria-partially stabilized zirconia (5Y-PSZ) ceramics for dental restorations using stereolithography (SLA) printing technique. The effects of different solid loadings on the microstructure, mechanical properties, and translucency were examined. Results showed that increasing powder concentration led to a decrease in cure depth and penetration depth. Higher solid loading resulted in a narrower pore size distribution in the green bodies, facilitating final densification. The highest green and sintered densities were achieved at 52 vol%, with corresponding values of 3.46 ± 0.01 g/cm3 and 6.01 ± 0.02 g/cm3.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Chemistry, Physical
Mi-Hyang Cho, Hyo-Joung Seol
Summary: The optical properties, microstructures, and phase fractions of multi-layered zirconia with and without yttria-gradient were evaluated and compared in this study. The translucency of e.max MT Multi was slightly higher than that of Katana STML, and the opalescence gradient was higher in Katana STML. Translucency increased from the dentin to enamel layer in both zirconia types, but the reasons behind the increase differed.
Article
Engineering, Biomedical
Raissa Monteiro Pereira, Tiago Moreira Bastos Campos, Estevam Augusto Bonfante, Gilmar Patrocinio Thim
Summary: This study evaluated the mechanical properties and microstructural features of in-house produced zirconia multilayer materials through characterization tests. The results showed that the bilayer zirconia materials had intermediate mechanical properties, and the failure origin was not at the interface, but residual stress was present between the layers.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Konstantinos Dimitriadis, Dimitrios Moschovas, Simeon Agathopoulos
Summary: This in vitro study characterized dental zirconia ceramics stabilized with a high amount of Y2O3, revealing that the materials have good mechanical properties and esthetics, making them suitable for fabricating dental restorations.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Seung-Ryong Ha, Yu-Sung Choi
Summary: The in vitro study investigated the changes in mechanical, optical, and surface properties of multilayered zirconia during hydrothermal aging. Results showed that hydrothermal aging led to increased surface roughness, opacity, and elasticity of multilayered zirconia, while decreasing concentrations of zirconia and yttrium, and increasing oxygen concentration and surface roughness. In addition, total transmittance increased while contrast ratio and Young's modulus decreased in all specimens after aging.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sivaranjani Gali, Suhasini Gururaja, T. Niranjana Prabhu, Srikari Srinivasan
Summary: This study explored the potential of Spark Plasma Sintering (SPS) technique for dental restorative materials using zirconia-reinforced fluormica glass (FM). By optimizing the processing parameters, SPS treatment improved the microstructure of FMZ and resulted in materials with high density, superior mechanical properties, and no genotoxicity on human gingival fibroblast cells.
Article
Chemistry, Physical
Mi-Hyang Cho, Hyo-Joung Seol
Summary: This study aimed to investigate the effect of high-speed sintering on the optical properties of dental 5Y-zirconia. The results showed that high-speed sintering slightly decreased the translucency in all layers except the dentin layer for Lava Esthetic, and decreased the opalescence in the dentin layer for Cercon xt ML and in all layers for Lava Esthetic. The decrease in translucency was attributed to a decrease in the yttria-rich t'-phase and an increase in the yttria-lean t-phase.
Article
Materials Science, Ceramics
Tadej Mirt, Anze Abram, Nigel van del Velde, Ivan Jerman, Raul Bermejo, Andraz Kocjan, Peter Jevnikar
Summary: Airborne-particle abrasion (APA) can mechanically enhance the adhesion between zirconia and resin in fixed dental prostheses, but its effects vary among different types of zirconia dental ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Dentistry, Oral Surgery & Medicine
Veronica P. Lima, Jaqueline B. Machado, Yu Zhang, Bas A. C. Loomans, Rafael R. Moraes
Summary: This study reviewed in vitro approaches used to simulate the degradation and fatigue of resin composite restorations. The included studies showed heterogeneity in methods, devices, and test parameters. The majority of studies combined cyclic loading with other aging methods. The study suggests the need for better clinical validation and reporting practices.
Article
Materials Science, Ceramics
Lukas Theis, Frank Kern
Summary: Partially stabilized zirconia ceramics with different gadolinia content were prepared by co-milling, spray granulation, axial pressing, and pressureless sintering. The redistribution of stabilizers at high sintering temperatures was observed by XRD. Substituting gadolinia for yttria reduced the stabilizer content in the tetragonal phase and increased the tetragonality, transformability, and toughness of the materials, while decreasing the hardness. The cubic content increased with increasing gadolinia content, as predicted by thermodynamic considerations.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Lucian Toma Ciocan, Jana Ghitman, Vlad Gabriel Vasilescu, Horia Iovu
Summary: The significant technological advancements in restorative dentistry and prosthodontics have led to the development of valuable CAD/CAM restorative dental materials with diverse design and improved mechanical, physical, and morphological properties. This research study aimed to compare the micro-mechanical properties of various CAD/CAM restorations used in clinical dentistry, finding the hybrid ceramic-based CAD/CAM to have the highest properties, followed by CAD/CAM PMMA-graphene, and the lowest in CAD/CAM multilayered PMMA.
Article
Chemistry, Physical
Marko Jakovac, Teodoro Klaser, Arijeta Bafti, Zeljko Skoko, Luka Pavic, Mark Zic
Summary: This study investigates the impact of Y3+ addition on the properties of zirconia materials, including grain size, grain boundary, lattice parameter values, and electrical parameters. The results show that Y3+ addition increases grain size and density, and influences the composition of the zirconia phases. Higher concentrations of Y3+ ions mainly incorporate into the tetragonal phase, resulting in decreased resistivity and increased capacitance in the grain boundaries.
Article
Physics, Multidisciplinary
Le Thu Lam, Vu Van Hung, Dang Thanh Hai, Le Thi Thanh Huong
Summary: In this study, the mechanical properties of yttria-stabilized zirconia (YSZ) crystal under extreme conditions were theoretically investigated using analytic free energy formulas derived from the statistical moment method. Elastic moduli and constants were calculated under high temperatures and pressures, considering the anharmonic effects of lattice vibrations. The results showed reasonable agreement with previous experiments and simulations, and this approach can be further developed to investigate the thermodynamic and mechanical properties of other ceramic materials used in solid oxide fuel cells.
Article
Chemistry, Multidisciplinary
Svetlana M. M. Posokhova, Vladimir A. A. Morozov, Dina V. V. Deyneko, Boris S. S. Redkin, Dmitry A. A. Spassky, Vitali Nagirnyi, Alexei A. A. Belik, Joke Hadermann, Erzhena T. T. Pavlova, Bogdan I. I. Lazoryak
Summary: The influence of preparation techniques on the structure and luminescent properties of K5Eu(MoO4)(4) (KEMO) was studied. The different synthesis techniques resulted in variations in the crystal structure of KEMO, with the CZ technique producing a (3 + 1)D incommensurately modulated structure. The crystal grown by the CZ technique also exhibited the highest luminescent intensity and a high quantum yield of 66.5%.
Article
Dentistry, Oral Surgery & Medicine
Watcharapong Tonprasong, Masanao Inokoshi, Muneaki Tamura, Keita Hatano, Shunsuke Minakuchi
Summary: The suppressive effect of a surface pre-reacted glass ionomer (S-PRG) on Candida albicans (C. albicans) activity and growth has been studied, but its effect on the expression of the lipase gene family has not been investigated. This study evaluated the effect of S-PRG filler eluates on lipase expression in C. albicans and found that the diluted S-PRG filler eluates suppressed lipase activity by downregulating LIP5 and LIP8 expression. These findings suggest that the S-PRG filler eluate has the potential to suppress fungal activity by downregulating lipase expression.
DENTAL MATERIALS JOURNAL
(2023)
Article
Chemistry, Physical
Nadezhda V. Vladimirova, Alexander S. Frolov, Jaime Sanchez-Barriga, Oliver J. Clark, Fumihiko Matsui, Dmitry Yu Usachov, Matthias Muntwiler, Carolien Callaert, Joke Hadermann, Vera S. Neudachina, Marina E. Tamm, Lada Yashina
Summary: Occupancy of different structural positions in a crystal lattice plays a key role in material properties. X-ray Photoelectron Diffraction (XPD) is a surface science structural method that can be used for occupancy analysis. By studying Sb2(Te1-xSex)3 mixed crystals, we found that XPD data showed excellent agreement with the reference method. We also discovered significant differences in anion occupancy between the surface and bulk.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Jide Han, Berfu Goksel, Shiva Mohajernia, Manuela Sonja Killian, Jozef Vleugels, Annabel Braem, Sylvie Castagne
Summary: Zirconia toughened alumina (ZTA) is commonly used in hip joint implants and cutting tools due to its unique properties. The difference in material properties between zirconia and alumina phases leads to the selectivity of phase melting and the disintegration of alumina grains during laser processing. This selective phase melting phenomenon makes the material removal mechanism of the nanocomposite significantly different from that of single-phase materials.
APPLIED SURFACE SCIENCE
(2023)
Article
Construction & Building Technology
Nicole Dilissen, Jef Vleugels, Jules Vermeiren, Beatriz Garcia-Banos, Juan Rafael Sanchez Marin, Jose M. Catala-Civera
Summary: This study focuses on the microwave (MW) dehydration and clinkering of hydrated cement paste, specifically investigating the MW-material interaction during heating to 1100 degrees C. The dielectric properties of various cement components were measured, and their changes were correlated to phase changes detected through different analysis methods. The research shows that ordinary Portland Cement (OPC) can be effectively MW heated, and the dielectric properties of hydrated cement contribute to its efficient heating process. The recovery of clinker phases demonstrates the potential for cement retrieval from hydrates.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Dentistry, Oral Surgery & Medicine
Masanao Inokoshi, Hengyi Liu, Kumiko Yoshihara, Mao Yamamoto, Watcharapong Tonprasong, Yasuhiko Benino, Shunsuke Minakuchi, Jef Vleugels, Bart Van Meerbeek, Fei Zhang
Summary: This study investigated crystallography, translucency, phase content, microstructure and flexural strength of two commercial strength-gradient multilayered dental zirconia grades. The results showed that the 'enamel' layer contains a higher amount of c-ZrO2, resulting in higher translucency but lower flexural strength. The strength-gradient approach allowed for integration of monoliths with irreconcilable properties.
Article
Materials Science, Multidisciplinary
Gamze Colak, Gregory Leinders, Jef Vleugels, Remi Delville, Marc Verwerft
Summary: A hybrid route combining internal gelation and a single-step infiltration was investigated to prepare U1-yNdyO2-x sintered microspheres as a surrogate for U1-yAmyO2-x transmutation targets. The use of starch as a pore-forming agent in the internal gelation process for fabricating porous uranium oxide microspheres has been studied in detail. High accessible porosity levels were measured after calcination, allowing efficient infiltration behavior and achieving high average dopant levels up to y = 30 mol% after sintering.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Chemistry, Physical
Andreas Paulus, Mylene Hendrickx, Selma Mayda, Maria Batuk, Gunter Reekmans, Miriam von Holst, Ken Elen, Artem M. M. Abakumov, Peter Adriaensens, Dirk Lamoen, Bart Partoens, Joke Hadermann, Marlies K. K. Van Bael, An Hardy
Summary: Layered Li-rich oxides are promising positive electrodes for Li-ion batteries due to their high specific discharge capacities. However, the anionic redox chemistry in these materials leads to irreversible structural transformations and voltage fade during cycling. In this study, Ti4+-substituted Li2MnO3 was synthesized and its structural stability and electrochemical performance were investigated. The results showed that increasing Ti content to x = 0.2 preserved the layered honeycomb-ordered structure and improved the reversibility of the anionic redox. Molecular dynamics simulations revealed the role of Ti substitution in lowering the activation energy barrier and promoting oxygen redox activity. Optimal electrochemical performance was achieved by carefully optimizing the Ti substitution degree.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Jacinthe Gamon, Jean-Marc Bassat, Antoine Villesuzanne, Mathieu Duttine, Maria Batuk, Daphne Vandemeulebroucke, Joke Hadermann, Fouad Alassani, Francois Weill, Etienne Durand, Alain Demourgues
Summary: Sr2FeO3+x F1-x (x = 0.08, 0.2), an n = 1 Ruddlesden-Popperphase, was synthesized through the oxidation of Sr2FeO3F, and the structural investigation reveals the presence of defect and impurity during the oxidation process. This study provides a basis for further research on the ionic and electronic transport properties of Sr2FeO3.2F0.8 and its application in devices such as solid oxide fuel cells.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
J. H. Huang, S. G. Huang, J. Vleugels
Summary: Binderless NbC with 0-25 wt% WC powder mixtures were pressureless sintered in vacuum at different temperatures to generate open porosity (Nb,W)C skeletons. The formation of residual minor amounts of W2C and WC was discussed and compared with thermodynamic predictions. The microstructure of the as-sintered homogeneous (Nb,W)C grains in the skeleton changed after Cu infiltration due to the partial dissolution of Nb. The properties of the as-sintered porous and Cu-infiltrated materials were evaluated and discussed.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
D. Lunt, R. Thomas, D. Bowden, M. T. P. Rigby-Bell, S. de Morae Shubeita, C. Andrews, T. Lapauw, J. Vleugels, J. Quinta da Fonseca, K. Lambrinou, P. Frankel
Summary: This work proposes a novel approach to detect strain localisation caused by irradiation-induced damage in nuclear materials on the microstructural level. High-resolution digital image correlation (HRDIC) is used to determine local strains and generate high-resolution strain maps, which can help understand the effects of irradiation-induced dimensional change and cracking. The combination of scanning electron microscopy (SEM) and HRDIC is demonstrated to measure irradiation-induced dimensional changes in three different materials and is crucial in designing microstructures that are structurally resilient during irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Maoyin Li, Shuigen Huang, Evita Willems, Jeroen Soete, Masanao Inokoshi, Bart Van Meerbeek, Jef Vleugels, Fei Zhang
Summary: This study proposes a hybrid 3D printing method that combines UV-curing with direct ink writing to fabricate tough and strong ceramics. The addition of a non-reactive diluent relieves polymerization-induced stress, avoiding warpage and cracking, and allows for locally tunable compositions.
ADVANCED MATERIALS
(2023)
Review
Dentistry, Oral Surgery & Medicine
Hengyi Liu, Masanao Inokoshi, Kaiqi Xu, Watcharapong Tonprasong, Shunsuke Minakuchi, Bart Van Meerbeek, Jef Vleugels, Fei Zhang
Summary: This study conducted a systematic review and meta-analysis to investigate the influence of speed-sintering on the optical and mechanical properties of dental YSZ. The results indicate that speed-sintering does not significantly affect the translucency, contrast ratio, flexural strength, and fracture toughness of YSZ compared to conventional sintering, but it does decrease the translucency parameter. Speed-sintering has no impact on the hardness of YSZ. Therefore, it can be used for preparing YSZ for dental restorations.
JAPANESE DENTAL SCIENCE REVIEW
(2023)
