Article
Chemistry, Multidisciplinary
Alessio Zandona, Aurina Martinez Arias, Mirjam Gutbrod, Gundula Helsch, Alfred P. Weber, Joachim Deubener
Summary: Glass-ceramic nanospheres of molar composition 0.83 SiO2 • 0.17 TiO2 are produced by the sol-gel spray-drying method, followed by controlled heat treatments up to 1200 degrees C. TiO2(B) and anatase nanocrystals are precipitated in the glassy matrix, with crystal sizes increasing over time. The nanospheres exhibit noticeable photocatalytic activity under UV-A irradiation, especially during annealing stages with higher amounts of TiO2(B) and smaller crystals.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Ceramics
Ebrahim A. Mahdy, Khadega M. Sahbal, Mostafa Mabrouk, Hanan H. Beherei, Yasser K. Abdel-Monem
Summary: A new TiO2-containing bioactive glass and glass-ceramics were designed and characterized for their physicochemical properties. The introduction of TiO2 substitutions led to enhanced thermal parameters and chemical stability of the materials. Cytotoxicity testing showed a safe dose range for cell viability, while differentiation tests demonstrated the superiority of glass-ceramics over native glasses in promoting cell differentiation.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ehsan Vafa, Reza Bazargan-Lari, Mohammad Ebrahim Bahrololoom
Summary: This study compared two different types of 45S5 bioactive glass-ceramic prepared with two different catalysts, and found that the Homemade Vinegar Catalyzed Bioactive Glass (HMVCBG) had more uniformity, larger specific surface area, and higher bioactivity levels compared to the traditional nitric acid catalyzed bioactive glass.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Zhuxing Tang, Yingjie Tao, Wenjie Zhang
Summary: The low-density TiO2-GB composite materials were synthesized via a sol-gel route with the support of glass bubbles. The bandgap energies and photocatalytic performance of the composites varied with different calcination temperatures.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Maria Eugenia Cruz, Joaquin Fernandez, Alicia Duran, Rolindes Balda, Yolanda Castro
Summary: Transparent oxyfluoride glass-ceramic (OxGCs) coatings with composition 1.2Nd3+ 80SiO2- 20LaF3 were prepared using a sol-gel route combined with a pre-crystallized nanoparticles route. These coatings consist of fluoride nanocrystals in a glass matrix and have shown promising results in powders and bulk glass-ceramics. In this study, aqueous suspensions of Nd3+-doped LaF3 nanoparticles were prepared and incorporated into a silica sol to form particulate sols. The resulting coatings exhibited well-structured crystalline-like emission spectra with lifetimes of 520 and 440 μs.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Narges Nasehi Gogajeh, Jafar Javadpour, Bijan Eftekhari Yekta
Summary: Bioactive glass microspheres (BGMs) were successfully produced using the sol-microemulsion-gel method, resulting in uniform and well-rounded microspheres under optimized conditions. Varying the reaction chamber size and stirring rate affected the diameter distribution of the microspheres, with increased stirring rate leading to the generation of smaller microspheres.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Nuray Yerli Soylu, Anil Soylu, Dilara Nur Dikmetas, Funda Karbancioglu-Guler, Sadriye Kucukbayrak, Melek Erol Taygun
Summary: TiO2-based ceramic nanofiber membranes were synthesized by combining sol-gel and electrospinning processes. The thermal treatment at different temperatures had a significant effect on the properties of the membranes. The nanofiber membranes calcined at 650 and 750 degrees C showed high photocatalytic and antibacterial activities, making them a promising candidate for wastewater treatment.
Article
Chemistry, Multidisciplinary
Maria Eugenia Cruz, Thi Ngoc Lam Tran, Alessandro Chiasera, Alicia Duran, Joaquin Fernandez, Rolindes Balda, Yolanda Castro
Summary: Oxyfluoride glass-ceramics (OxGCs) with the molar composition 80SiO(2)-20(1.5Eu(3+): NaGdF4) were prepared using sol-gel method with pre-crystallised nanoparticles. The structural and optical properties of the OxGCs were characterized using XRD, FTIR, HRTEM, and emission/excitation spectra. The results showed promising potential for transparent OxGCs coatings in photonic applications.
Article
Materials Science, Ceramics
Amirhossein Moghanian, Saba Nasiripour, Atiyyeh Koohfar, Mohammad Sajjadnejad, SeyedMohammad Hosseini, Mohsen Taherkhani, Zahra Miri, Seyed Hesamedin Hosseini, Mehrnaz Aminitabar, Ali Rashvand
Summary: The study shows that the optimal amount of titanium substitution in bioactive glasses can enhance hydroxyapatite formation, with 5 mol.% titanium substitution demonstrating the best biocompatibility and biological activity.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Alessio Zandona, Gundula Helsch, Aurina Martinez Arias, Alfred P. Weber, Joachim Deubener
Summary: Lithium aluminosilicate glass-ceramic powders were successfully synthesized by heat treating spray-dried sol-gel glassy nanobeads, resulting in the formation of quartz solid solution and keatite solid solution crystals with tunable coefficients of thermal expansion. The aerosol synthesis method was proven to be very versatile for producing glass-ceramic powders in the LAS system.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
G. Monros, M. Llusar, J. Badenes, R. Galindo
Summary: A frit is a glassy ceramic composition that is made by fusion, quenching, and granulating. It can be used for the preparation of ceramic glazes for waterproofing and aesthetic purposes.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
P. Rastgoo Oskoui, M. Rezvani
Summary: This study focuses on the effect of chemical composition and heat treatment temperature on the magnetic behavior of ferrimagnetic glass-ceramics. The results show that increasing the FeO content in the glass-ceramic compound leads to an increase in the percentage of maghemite phase. It is also observed that the role of iron cations in the network structure changes from former to modifier with varying heat treatment temperature. The magnetization of the glass-ceramics increases with the increase in FeO content, and the morphology of the maghemite crystals changes from spherical to dumbbell-shaped.
Article
Materials Science, Multidisciplinary
Efrat Shukrun Farrell, Nir Ganonyan, Ido Cooperstein, May Yam Moshkovitz, Yaron Amouyal, David Avnir, Shlomo Magdassi
Summary: Aerogels, the lightest solid material known, are nanoporous solids with low density, widely used in various applications. This study introduces a new comprehensive solution for preparing aerogels photochemically and fabricating them in complex shapes at different scales.
APPLIED MATERIALS TODAY
(2021)
Article
Materials Science, Ceramics
Rob Atkin, Timothy B. Sercombe, Neda Ghaebi Panah
Summary: Bioactive glass scaffolds are commonly used in bone tissue engineering applications, and sintering is often employed to enhance their mechanical strength. However, sintering can lead to crystallization, resulting in reduced bioactivity and biodegradability. This study compared the in-vitro bioactivity and biodegradability of sintered 58S bioactive glass made from fully amorphous powder and partially crystalline powder with the same chemical compositions. The results showed that the sintered 58S produced from glass ceramic powder exhibited higher in-vitro bioactivity and biodegradability rate than that from fully amorphous powder. The initial structure after calcination was found to be crucial in determining the subsequent crystallization during sintering, and the presence of crystallinity and hydroxyapatite formation after calcination played important roles in increasing the bioactivity and biodegradability rate of the sintered 58S.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Julio Correa, Jairo Murillo, Javier Jurado, Lina Garcia, Liliana Tirado, Hernan Colorado, Jesus Evelio Diosa, Alessandro Chiasera, Clara Goyes
Summary: This study focuses on the analysis of the crystallization process and the optical responses of Al2O3/glass-ceramic coatings on a brass substrate after laser surface modification. The study found that increasing irradiation power enhances the resolution of the photoluminescence response, and X-ray diffraction patterns show the presence of different crystalline phases in the irradiated samples.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Ceramics
Dan Zhao, Yi Feng, Zhipeng Pi, Fan Zhang
Summary: Phase equilibria in the ZrO2-GdO1.5-TaO2.5 (ZGTO) system were experimentally investigated, and the differences between ZGTO and the existing ZrO2-YO1.5-TaO2.5 (ZYTO) were discussed. The study is useful for thermodynamic assessment of ZGTO and can guide the design of novel thermal barrier coatings materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yutaka Ohya, Wingki Mey Hendra, Chika Takai-Yamashita, Takayuki Ban
Summary: Diffusion couples of rutile and corundum single crystals were prepared and examined to study the solid solution and precipitation of corundum in rutile during cooling. Different precipitation forms of corundum were observed under different cooling conditions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiaming Zhan, Yunfa Guo, Hao Wang
Summary: This study systematically investigates the mechanical behaviors of calcium fluoride in humid environments. The effects of water on the deformation and plastic enhancement of CaF2 under indentation are explored through microindentation experiments, atomic simulations, and Raman spectroscopy measurement.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hangfeng Zhang, Henry Giddens, Theo Graves Saunders, Matteo Palma, Isaac Abrahams, Haixue Yan, Yang Hao
Summary: The relationship between low and high frequency tunabilities in tin substituted barium titanate ceramics was investigated. It was found that there are differences in tunabilities at different frequencies due to the different activities of larger ferroelectric domains and polar nanoclusters.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Kaibiao Xi, Jiacheng Liu, Beibei Song, Huarong Cheng, Yihao Li, Xiaole Yu, Mupeng Zheng, Mankang Zhu, Yudong Hou
Summary: Composite modulation in the superparaelectric state of the BTBZ-CT system is proposed as an effective strategy to achieve both NTCC and excellent energy storage performance in dielectric ceramics. The addition of BZ and CT to BT ferroelectrics can move the SPE state to the normal use temperature zone, resulting in enhanced NTCC characteristics and energy storage performance. Furthermore, intentional precipitation of CT at grain boundaries can refine the grain size, increase the bandgap, and strengthen the local electric field distribution, thereby enhancing the breakdown electric field.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Hamed Salimkhani, Lovro Fulanovic, Till Froemling
Summary: The demand for robust multilayer ceramic capacitors with high-temperature and high-power capabilities is increasing rapidly. However, cost-effective production is a challenge. This study investigates the use of Na0.5Bi0.5TiO3-based materials as promising lead-free options. By adding sintering aids, the sintering temperature of Na0.5Bi0.5TiO3-BaTiO3-CaZrO3-BiAlO3 solid solutions was successfully reduced to 975 degrees C, suitable for co-sintering with Cu electrodes without adverse effects on capacitor properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Mingxing Li, Ran Mo, Zeshui Xu, Jie Zhou, Conglin Zhang, Xuefeng Cui, Fang Ye, Laifei Cheng, Ralf Riedel
Summary: Polymer infiltration and pyrolysis is an effective method for preparing ceramic matrix composites. The transformation of polymer to ceramic during the process affects the residual stress and interface behavior in the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yan Kang, Lin Chen, Chang-Jiu Li, Guan-Jun Yang
Summary: A novel abradable seal coating with low hardness and high bonding strength was successfully designed and prepared. This coating has significantly higher abradability and erosion resistance compared to metal-based coatings, and can retain excellent abradability and have a long lifetime during service.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Qingzhong Song, Xiangdong Zha, Ming Gao, Yingche Ma
Summary: This study analyzes the influence of calcia refractory purity on the properties of calcia crucibles. Higher purity calcia results in well-developed grains and improved hydration resistance, leading to better high-temperature strength and thermal shock resistance. In contrast, lower purity calcia crucibles exhibit inferior properties. Therefore, high-purity calcia is considered a potential refractory for manufacturing oxide crucibles.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sehreish Abrar, Faisal Nazeer, Zhuang Ma, Ling Liu, Abdul Malik, Mustafa Kamal, Abdullah G. Al-Sehemi
Summary: To raise the operating temperature of Si-based ceramic matrix composites (CMCs), researchers have applied thermal/environmental barrier coating (T/EBCs) materials, typically rare earth silicates. However, the high thermal conductivity and the mismatch of thermal expansion have been major challenges in developing new materials that can offer thermal insulation and environmental protection to CMCs. In this study, entropy engineering was used to create a multicomponent equi-atomic single-phase pyro silicate with extremely low thermal conductivity and enhanced water vapor corrosion resistance. The research findings show the potential of high entropy disilicates in achieving ultra-low thermal conductivity and low weight loss in corrosive environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zi-bo Niu, Daxin Li, Dechang Jia, Zhihua Yang, Kunpeng Lin, Paolo Colombo, Ralf Riedel, Yu Zhou
Summary: In this study, SiBCN ceramics with a special structure were prepared to improve the oxidation resistance. The effect of the structure on oxidation behavior and kinetics was investigated, revealing that the special structure can effectively inhibit heterogeneous oxidation and enhance the oxide layer composition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Melike Donmez, Metehan Erdogan, Cihangir Duran
Summary: The limited densification of CeO2 ceramics was improved by using an anorthite-based glass, resulting in high dielectric constant and quality factor with minimum dielectric loss. The CeO2-(anorthite-based) glass ceramic showed promising results in terms of low temperature densification and microwave properties.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
S. Rahmati, R. G. A. Veiga, J. Mostaghimi, T. Coyle, A. Dolatabadi
Summary: This study provides an atomic-scale description of the high-velocity impact of alpha-Al2O3 particles onto an alpha-Al2O3 substrate during Aerosol Deposition (AD). The results suggest that the crystal orientation plays a crucial role in both plasticity and damage of the nanoparticles. Impact velocity has a direct correlation with plasticity and fragmentation, but adhesion efficiency has only a marginal increase. The crucial element lies in the substrate's surface alterations caused by the fragments left on the substrate after impact.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Bo-Wen Chen, Yan-Mei Kan, De-Wei Ni, Chun-Jing Liao, Hong-Da Wang, Yu-Sheng Ding, Shao-Ming Dong
Summary: This study characterized the long-term and repeated ablation properties of modified Cf/HfC-SiC composites with YB4-Al2O3-Si3N4 under an air plasma torch. The structural stability and viscosity of the oxide layer were found to affect the ablation resistance of the composites. By forming nano c-HfO2 grains and high-viscosity Al-Si-Y-O glassy phase, the structural stability of the oxide layer was improved, resulting in enhanced ablation resistance. However, the oxidation of Si3N4 led to the formation of NO, NO2, and excessive SiO2 glassy phase, which resulted in a porous structure and reduced the viscosity of the oxide layer. Therefore, the addition of Si3N4 decreased the ablation resistance of the composites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yongxing Wei, Huawei Zhang, Siyuan Dong, Changqing Jin, Chenxing Bai, Junle Dai, Zengzhe Xi, Zhonghua Dai, Zengyun Jian, Li Jin
Summary: In this study, solid solutions of xBi(Ni1/2Hf1/2)O-3-(1 - x)PbTiO3 (xBNH-PT) were synthesized to investigate their phase boundary behaviors and physical properties. The presence of a tetragonal-pseudocubic phase boundary and a spontaneous ferroelectric-relaxor transition at specific compositions were confirmed. The introduction of a tetragonal-pseudocubic phase boundary improved the piezoelectric properties and suppressed the spontaneous ferroelectric-relaxor transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2024)