Article
Materials Science, Ceramics
Guo-Qing Li, Min Yu, Hang Luo, Ze-Ya Huang, Ren-Li Fu, Francesco Gucci, Theo Saunders, Kong -Jun Zhu, Dou Zhang
Summary: To solve the problems in the production process of wood-derived C-SiC composites, such as low infiltration efficiency and poor mechanical properties, thermal modification of fir at low temperatures combined with sol-gel infiltration was used to produce biomorphic ceramics. The materials showed improved interfacial bonding and mechanical properties. The highest compressive strength and bending strength were observed in composites sintered at 1400 degrees C, while lower strengths were observed in composites sintered at 1600 degrees C due to excessive consumption of carbon. Thermal modification can promote slurry infiltration and improve the mechanical properties of the composites.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Anithadevi Sekar, Ramanan Vadivel, Ramanujam Ganesh Munuswamy, Rakhi Yadav
Summary: The study introduces a new fingerprint visualizing agent, the biocompatible zinc oxide-carbon dots/silica gel (C-ZnO-dots/Si) nanopowder, which is low-cost and non-toxic. Results show that the synthesized nanopowder performs well in LF identification and can extract features of Level 1-3.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Fahimeh Sharifi, Zahra Mahmoodi, Saloumeh Mesgari Abbasi, Abolhassan Najafi, Gholamreza Khalaj
Summary: Titanium carbide nanopowders and nanowhiskers were synthesized using the sol-gel process with phenolic resin and titanium alkoxide as precursors. The synthesis temperature and soaking time were found to affect the free carbon content and the formation and morphology of TiC nanopowders. Nucleation of titanium carbide occurred at approximately 1200 degrees C and ended at 1400 degrees C. The synthesized nanopowders had mesoporous structure with a specific surface area of 150 m2/g, and TiC nanowhiskers heterogeneously nucleated and grew in a soaking time of 3 h. The free carbon content in the synthesized product under 3 h soaking time was less than 1%.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Abolhassan Najafi, F. Golestani-Fard, H. R. Rezaie, Saviz Parsa Saeb
Summary: SiC-B4C nano powders were synthesized through sol-gel process in water-solvent-catalyst-dispersant system. The formation mechanism of the product during sol-gel process was evaluated using TEM, SEM, DTA/TG, BET, XRD, FTIR and DLS analysis methods. The nanoparticles had a high surface area and meso porous surfaces, with SiC-B4C particles in the range of 20-40 nm.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
J. G. Ke, R. Liu, Z. M. Xie, M. Sun, K. Jing, G. F. Zhang, X. Cheng, X. Q. Liu, X. P. Wang, X. B. Wu, C. S. Liu, Q. F. Fang
Summary: In this study, tungsten carbide (WC) nanopowders with an average size of about 10 nm were synthesized using a sol-gel preparation, reduction and carbonization process, and high-energy ball milling. This method provides a facile and cost-effective way to prepare nanoscale WC powders suitable for industrial production.
Article
Engineering, Electrical & Electronic
Yang Lu, Yiting Shan, Xiang Guo, Yajuan Zhang, Jingmin Feng, Hongqing Zhou
Summary: CaO-B2O3-SiO2/Al2O3/SiO2 composites were developed for LTCC applications, and their sintering behavior, phase compositions, microstructure, dielectric properties, and mechanical properties were investigated. The results showed that an appropriate amount of silica could reduce the dielectric constant and improve the dielectric properties of the composite material. The CBS/Al2O3/SiO2 glass ceramics with 32 wt% Al2O3 and 16 wt% SiO2 achieved excellent comprehensive performance and matched well with the silver electrode, making it a highly promising material for LTCC applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Biochemistry & Molecular Biology
Atheer Al Khudhair, Karim Bouchmella, Pierre Hubert Mutin, Vasile Hulea, Olinda Gimello, Ahmad Mehdi
Summary: The development of green and sustainable materials for use as heterogeneous catalysts is an emerging field of research in chemistry. This study prepared SiO2-Al2O3 mixed oxide catalysts with different Si/Al ratios using different methods and characterized their properties. The results showed that the Si/Al ratio of the catalysts influenced the texture and acidity of the mesoporous materials.
Article
Materials Science, Coatings & Films
F. Khalesi, M. Farhadian, K. Raeissi
Summary: In this work, post-treatment sol-gel methods using acidic and alkaline TEOS solutions were applied to refine the porous network of ZrO2 coating and improve corrosion resistance. The alkaline TEOS solution resulted in the formation of a dense SiO2 interlayer and narrowed pores in the coating, providing the best barrier performance. On the other hand, the acidic TEOS solution mainly formed thin SiO2 layers on the ZrO2 coating surface, leading to poor barrier performance due to electrostatic repulsion forces.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Thermodynamics
S. Kurajica, K. Muzina, I. Simcic, V. Mandic
Summary: This work presents a study of the thermal evolution of gels obtained by chelation of aluminum sec-butoxide with ethyl acetoacetate. The results show that samples with a low Eaa/Asb ratio are mainly amorphous, while samples with a high Eaa/Asb ratio are predominantly chelate. Crystallization of gamma-Al2O3 occurs between 600 and 1000 degrees C in two separate processes for all samples. Complete transition to alpha-Al2O3 at 1200 degrees C only occurs in samples with a high Eaa/Asb ratio, while it is partial for samples with a low Eaa/Asb ratio. The observed mass loss is consistent with the assumption that the overall gel content in the samples can be represented by a simplified formula Al(Eaa)(x)O(3-x)/2, where x is the Eaa/Asb ratio.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Agricultural Engineering
Jiajun Wang, Riley Simson, Roland Gleisner, Sara J. Fishwild, Marshall Begel, J. Y. Zhu
Summary: This study investigated the use of carbonate pre-treatment followed by densification to produce advanced wood structural materials. The results showed that carbonate effectively removed lignin and hemicelluloses, improving the mechanical properties of the wood. Compared to sodium hydroxide pre-treatment, carbonate pre-treatment achieved similar strength levels but with higher wood yield. This study highlights the significance of using spent process liquors for low-cost and environmentally friendly wood pre-treatment.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Materials Science, Ceramics
Pooja Yadav, R. Prasada Rao, P. Abdul Azeem
Summary: The current study successfully synthesized nanostructured CaTiO3 powder using two modified sol-gel methods. The addition of leaf extract effectively reduced the particle size. Characterization techniques including XRD, FE-SEM, Rietveld refinement, FTIR, XPS, UV-Vis, and PL were used to confirm the nanometric particle size, crystalline structure, phase involvement, functional groups, elemental composition, and optical properties. The synthesized sample showed promising potential as a blue color phosphor for LED applications.
CERAMICS INTERNATIONAL
(2023)
Article
Environmental Sciences
Alexandra Avram, Sorin Rapuntean, Maria Gorea, Gheorghe Tomoaia, Aurora Mocanu, Ossi Horovitz, Gheorghe Rapuntean, Maria Tomoaia-Cotisel
Summary: This study aimed to prepare, characterize, and evaluate the in vitro antibacterial activity of forsterite (Mg2SiO4) nanopowder obtained through sol-gel and co-precipitation methods. The co-precipitation method produced forsterite nanopowder with superior bactericidal activity against Staphylococcus aureus, showing inhibitory effects at a concentration of 10 mg/mL. The unique surface properties, such as specific surface area and nano-regime particle size, contribute to the enhanced bactericidal activity of the co-precipitated forsterite nanoparticles, reported for the first time as a novel bactericidal nanomaterial against S. aureus.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Diksha Choudhary, Deepika Tavar, Pardeep Singh, Pankaj Raizada, Mohammad Ashiq, Avanish Kumar Srivastava, Archana Singh
Summary: This study synthesized nano-gamma Al-Mn-O to remove As(III) and fluoride from groundwater. The results showed that the synthesized material had a good removal capacity.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Environmental Sciences
Syed Irfan, Sadaf Bashir Khan, Su Shiung Lam, Hwai Chyuan Ong, Muhammad Aizaz Ud Din, Fan Dong, Deliang Chen
Summary: Increasing water pollution is a severe problem in industrialized countries. Nanomaterials have the potential to efficiently remove organic pollutants. Co-doped bismuth ferrite nanostructures show high efficiency in eliminating acetophenone from pharmaceutical wastewaters. This research highlights the importance of co-doped bismuth ferrite photocatalysts in treating industrial wastewater.
Article
Materials Science, Multidisciplinary
Nahla Djebbari, Dikra Bouras, Hichem Farh
Summary: A previously unused compound consisting primarily of nickel oxide doped with varying amounts of zinc and manganese was prepared from expired materials using the sol-gel method. The structural and optical properties of the resulting powders were studied using X-ray diffraction, scanning electron microscopy, and infrared testing. The findings showed that the doped compound exhibited enhanced photocatalytic activity and increased optical absorbance in the visible region.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Biomedical
Despoina Brasinika, Olga Tsigkou, Athena Tsetsekou, Yiannis F. Missirlis
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
(2016)
Article
Chemistry, Physical
I. Kitsou, P. Panagopoulos, Th. Maggos, M. Arkas, A. Tsetsekou
APPLIED SURFACE SCIENCE
(2018)
Article
Materials Science, Ceramics
Fotini Petrakli, Michalis Arkas, Athena Tsetsekou
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2018)
Article
Geochemistry & Geophysics
Kostas Komnitsas, Evangelos Petrakis, Olga Pantelaki, Anna Kritikaki
Article
Nanoscience & Nanotechnology
Ioanna Kitsou, Athena Tsetsekou
JOURNAL OF NANOMATERIALS
(2019)
Article
Chemistry, Physical
I. Kitsou, P. Panagopoulos, Th. Maggos, A. Tsetsekou
APPLIED SURFACE SCIENCE
(2019)
Article
Engineering, Environmental
Vasiliki Savvilotidou, Anna Kritikaki, Antonios Stratakis, Konstantinos Komnitsas, Evangelos Gidarakos
Article
Chemistry, Physical
Tatiana Giannakopoulou, Nadia Todorova, Anastasia Erotokritaki, Niki Plakantonaki, Athena Tsetsekou, Christos Trapalis
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Applied
M. Arkas, M. Douloudi, E. Nikoli, G. Karountzou, I Kitsou, E. Kavetsou, D. Korres, S. Vouyiouka, A. Tsetsekou, K. Giannakopoulos, M. Papageorgiou
Summary: In this study, silver nanoparticles were synthesized using PEI as a template and immobilized on silica substrates to create hybrid nanocatalysts. The effects of different PEIs and pH regulators were investigated, and the catalytic performance was improved through organic scaffold pyrolysis. This eco-friendly synthesis procedure proved to be a successful alternative for producing multifunctional nanomaterials at ambient temperature.
REACTIVE & FUNCTIONAL POLYMERS
(2022)
Article
Multidisciplinary Sciences
Michael Arkas, Marilina Douloudi, Eleni Nikoli, Georgia Karountzou, Ioanna Kitsou, Eleni Kavetsou, Dimitrios Korres, Stamatina Vouyiouka, Athena Tsetsekou, Konstantinos Giannakopoulos, Michaela Papageorgiou
Summary: Silica-organic matrix-silver nano-catalysts were synthesized and characterized in this study. Kinetic studies were conducted to optimize the preparation of eco composites.
Article
Materials Science, Multidisciplinary
Louise Kruse Jensen, Henrik Elvang Jensen, Sophie Amalie Blirup-Plum, Mats Bue, Pelle Hanberg, Lasse Kvich, Bent Aalbaek, Yuly Lopez, Sara M. Soto, Marilina Douloudi, Michaela Papageorgiou, Eleni Nikoli, Michael Arkas, Ignacio Gutierrez-del-Rio, Sara Lopez-Ibanez, Claudio J. Villar, Felipe Lombo, Paraskevi Gkomoza, Ioanna Kitsou, Athina Tsetsekou, Michalis Vardavoulias
Summary: The use of bone implants and prostheses has revolutionized modern medicine. The development of new material designs, such as the sol-gel coating technique described in this study, has the potential to prevent implant-associated bone infections and represent a gamechanger in orthopedic research.
Article
Materials Science, Composites
Ioannis Makrygiannis, Athena Tsetsekou
Summary: Thermal insulation bricks are an energy efficient building material that provides fire resistance and remarkable thermal capacity. This study investigates the use of expanded perlite as an additive in the production of these bricks and examines its impact on properties such as density, thermal conductivity, and bending strength. The results show that adding perlite can significantly decrease the density and thermal conductivity of the bricks while slightly reducing their bending strength.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
Michaela Papageorgiou, Ioanna Kitsou, Paraskevi Gkomoza, Eleni Roussi, Eleni Lychna, Panagiota Angelopoulou, Vasiliki Papalouka, Athena Tsetsekou
Summary: In this paper, a novel photocatalyst consisting of a bio-mimetically formed silica core and silver based nanospheres attached to the substrate was prepared, characterized and tested. The photocatalytic activity of the catalyst was enhanced by the synergistic effect of silver, silver carbonate, and silver phosphate. The immobilization of the catalyst on silica substrates improved its photostability and prevented the formation of silver agglomerates. Various techniques were used to examine the structure of the catalyst and its photocatalytic properties were evaluated through a model reaction. The reusability of the catalyst was also demonstrated.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
I Kitsou, M. Arkas, A. Tsetsekou
SN APPLIED SCIENCES
(2019)
Article
Materials Science, Ceramics
I. Kitsou, E. Roussi, A. Tsetsekou
CERAMICS INTERNATIONAL
(2017)
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)
