Article
Chemistry, Physical
O. E. Cigarroa-Mayorga, S. Gallardo-Hernandez, P. Talamas-Rohana
Summary: In this study, SERS substrates were synthesized by growing Au nanoparticles layer over porous anodized aluminum oxide support, with the strongest effect observed in a 50 nm Au precursor layer. The method is highly reproducible and has a homogeneous size distribution compared to other methods and substrates.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Wei Zhou, Naoki Ogiwara, Zhewei Weng, Congcong Zhao, Likai Yan, Yuji Kikukawa, Sayaka Uchida
Summary: This study presents the first example of a vanadium-substituted delta-Keggin Al-13-based porous Ionic crystal (PIC), which exhibits Lewis acidity. The Lewis acidity was confirmed through acetalization reaction using Al28V4-PW9V3 as a solid catalyst and investigating with pyridine or 2,6-lutidine as basic probe molecules.
CHEMICAL COMMUNICATIONS
(2022)
Article
Materials Science, Ceramics
Haoran Zou, Xide Li, Chuo Zhang, Bin Li, Yuzuo Liu, Xuejin Yang, Lieqiang Xiong, Xiao Zheng, Junsheng Yang
Summary: The study demonstrated that the Al content has a significant impact on the pore structures of TiVAlC ceramics, as increasing Al content can reduce pore size and viscous permeability coefficients while increasing porosity. However, once the Al content exceeds a certain range, these properties exhibit an opposite trend.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Z. Lovinger, C. Czarnota, S. Ravindran, A. Molinari, G. Ravichandran
Summary: Experimental investigation on closed-cell porous aluminum with small porosity provides evidence for the fundamental role of micro-inertia in describing shock structure in porous materials. The study conducted plate impact experiments on porous aluminum samples with varying levels of porosity to validate behavior revealed through analytical approaches, highlighting the significant role of micro-inertia effects in such cases. The structure of steady shock was characterized as a function of porosity, confirming the importance of micro-inertia effects in modeling the dynamic behavior of porous materials.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Green & Sustainable Science & Technology
Sabine Jessica Ouedraogo, Ya Vinh, Pongsak (Lek) Noophan, Vincenzo Naddeo, Chi-Wang Li
Summary: The dissolution of aluminum hydroxide was studied to recover fluoride and neutralize acidity. Dissolving aluminum hydroxide with sodium carbonate reduced the treatment cost by 45% compared to using other aluminum salts. Two types of aluminum hydroxide with different crystallinity were investigated, showing different effects on dissolution.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Nanoscience & Nanotechnology
Shuhui Xia, Yuanyuan Zhang, Yun Zhao, Xiao Wang, Jianhua Yan
Summary: This study presents a scalable electrospinning technique to fabricate porous carbon nanofibers with tunable pore structures by adjusting the mass ratios of carbon precursors. The resulting PCNFs have high porosity and adjustable pore volume, making them suitable for constructing high-performance electrodes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Mathematics, Interdisciplinary Applications
Hongyang Ni, Jiangfeng Liu, Xiaozhao Li, Ziheng Sha, Hai Pu
Summary: Permeability, as a critical parameter in characterizing fluid migration in porous media, plays a crucial role in guiding geotechnical engineering practice. This study proposes an improved permeability model based on the fractal features of porous geomaterials, taking into account the periodic variation of pore path cross-section and pore surface roughness. The model provides better insight into fluid transport mechanism and accurate prediction of permeability in high-low-permeability porous media can be achieved by considering the variation of key parameters.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Fatma Cagla Durmus, Jose Miguel Molina Jorda
Summary: The development of porous materials with hierarchical porous structures has attracted great interest, as these materials exhibit properties representative of different pore scales and open up the possibility of new applications. The method discussed in this paper involves the preparation of silver foams with hierarchical porous structures by combining the replication method with dealloying, resulting in materials with pores ranging from nanometers to micrometers and exhibiting high antibacterial performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Ramachandra Chikkegowda, Dinesh Rangappa, Zhong Chen, Hemam Rachna Devi, Ashok Kumar Yadav, Karuna Kar Nanda
Summary: In this study, bimetallic and trimetallic (Ni, Co and Mn) oxide-hydroxide nanosheets were synthesized and their catalytic activity in water oxidation was evaluated. The trimetallic nanosheets showed higher catalytic activity than the bimetallic hybrids. X-Ray Photoelectron Spectroscopy and Mott-Schottky analysis revealed that the trimetallic systems have a larger electrochemical surface area and better intrinsic activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Ahmet Alperen Gunay, Sivasankaran Harish, Masanori Fuchi, Ikuya Kinefuchi, Yaerim Lee, Junichiro Shiomi
Summary: We demonstrate a novel strategy to enhance the thermoelectric conversion efficiency by utilizing the latent heat of atmospheric water, radiative cooling, and an enhanced surface area. Coating porous copper substrates with metal-organic frameworks significantly increases the heat transfer efficiency, leading to a substantial increase in the total electromotive force generated by the thermoelectric generator within 30 minutes.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Rui Liu, Li Chen, Shouguang Yao, Yan Shen
Summary: The study investigates the dynamics of capacitive charging and desalination in CDI cells by developing a pore-scale model and effective boundary conditions. Various factors affecting these processes are explored, highlighting the importance of porous electrode properties in salt removal rate and adsorption capacity.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Polymer Science
Elpida Piperopoulos, Giuseppe Scionti, Mario Atria, Luigi Calabrese, Edoardo Proverbio
Summary: This paper aims to develop and optimize flame-retardant coatings for naval applications. The study investigates the effect of adding magnesium hydroxide and aluminum hydroxide fillers in an acrylic carrier on the fire resistance of the coatings. The results show that the coatings based on aluminum and magnesium hydroxides exhibit favorable fire resistance, particularly for short times of exposure to direct flames.
Article
Materials Science, Multidisciplinary
Zhengzheng Xu, Yan Liu, Chuncheng Yang, Guoyong Wang
Summary: Aluminum-based superhydrophobic surfaces have attracted great interest but face challenges in cold conditions due to frost and ice formation. The research has successfully developed a lubricant-infused porous surface that not only possesses self-cleaning, non-infiltration, and durability properties like the superhydrophobic surface, but also effectively delays freezing and has advantages in passive defrosting.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Physics, Multidisciplinary
J. L. Gonzalez
Summary: The study reveals that the pore structure simulated through a fully-interpenetrable sphere model exhibits multifractal statistics, with the multifractal parameters depending on porosity. Additionally, porous structures with the same porosity may have slightly different multifractal dimensions, indicating a possible correlation with the heterogeneity level of the solid-phase.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Review
Materials Science, Multidisciplinary
Michael Schneider, Wolfram Fuerbeth
Summary: The presentation provides an overview of anodizing as corrosion protection and highlights the importance of pore design in the application of anodizing layers.
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
(2022)
Article
Materials Science, Ceramics
Rafael Salomao, Veridiana Lopes Ferreira, Ligia M. M. Costa, Ivone Regina de Oliveira
CERAMICS INTERNATIONAL
(2018)
Article
Materials Science, Multidisciplinary
Leandro Fernandes, Rafael Salomao
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Rafael Salomao
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2018)
Article
Materials Science, Ceramics
Ligia M. M. Costa, Jose Sakihama, R. Salomao
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2018)
Article
Materials Science, Multidisciplinary
Leandro Fernandes, Renata Aquino de Carvalho, Andre Capaldo Amaral, Edison Pecoraro, Rafael Salomao, Eliane Trouatti
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2019)
Article
Materials Science, Ceramics
R. Salomao, V. C. Pandolfelli
CERAMICS INTERNATIONAL
(2020)
Article
Materials Science, Ceramics
Rafael Salomao, Mirian A. Kawamura, Ana B. Emilio, Jose Sakihama, Ana M. Segadaes
Summary: Calcium hexaluminate (CA6) is a densification-resistant material used as high-temperature thermal insulators. This study investigated the combination of calcined alumina and calcium aluminate cement (CAC) in forming porous CA6. Different porogenic events were observed at various temperatures, with porosity content controlled by CAC content and curing conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Rafael Salomao, Leandro Fernandes, Natalia C. M. Spera
Summary: The study investigated the combined effects of variable SiO2/Al2O3 ratios and the presence of low-melting-point impurities on the physical properties and microstructure of in situ alumina-mullite ceramics. Different microsilica loads were found to hinder densification of the matrix, favor grain growth events, and significantly affect the amount of liquid phases formed, leading to different microstructures and levels of flexural strength and total porosity in the samples.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
R. Salomao, C. C. Arruda, V. C. Pandolfelli, L. Fernandes
Summary: By varying the ratios of Mg(OH)2-Al2O3 and sintering temperature, structures with tailored porosity, compression strength, thermal conductivity, and pore sizes in the range of 15 μm were obtained, suitable for high-temperature materials.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
B. P. Bezerra, A. P. Luz, R. Salomao, V. C. Pandolfelli
Summary: Polymeric fibers can act as drying additives for refractory compositions to enhance their explosion resistance. The changes in fiber morphology during softening and melting process have a significant impact on the drying behavior of refractory castables.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
A. P. Luz, M. H. Moreira, R. Salomao, M. A. L. Braulio, V. C. Pandolfelli
Summary: This article focuses on the drying process and its influencing factors of monolithic dense refractories, including the effects of drying agents on material microstructure and the related effects of heating program design. Recent advances indicate that appropriate drying additives and engineering techniques can improve the safety and stability of refractory materials.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Rafael Salomao, Leandro Fernandes
Summary: The hydroxylation behavior of magnesia (MgO) has been extensively studied in dilute suspensions, but its effects on concentrated systems have not been systematically analyzed. In this study, the hydroxylation behavior of different sources of magnesia in aqueous suspensions with various solids concentrations was investigated. The results showed that the hydroxylation degree, volumetric expansion, and maximum internal temperature during curing were more pronounced in suspensions containing caustic magnesia. Despite the small quantity of hydroxylation products formed, compositions with higher solid loads had higher reaction yield levels. Significant differences in the microstructure of the products were observed and attributed to the ions' mobility towards crystallization nuclei.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2023)
Article
Materials Science, Ceramics
Rafael Salomao, Isabela S. Martinatti, Leandro Fernandes, Andreas Sundblom, Peter Greenwood, Paulo R. T. Tiba
Summary: This study used a novel aqueous dispersion of colloidal silica, whose particles' surfaces were modified with an epoxysilane-based coupling agent, to combine with fine MgO powder, generating self-flowing MgO-colloidal silica suspensions of excellent workability. After curing, a dense magnesium silicate hydroxide hydrate protective coating formed over MgO particles, hindering their hydroxylation and volumetric expansion. During thermal treatment, softened silica particles promoted densification. The microstructure after sintering comprised dense MgO grains surrounded by thin layers of forsterite.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Biomedical
P. R. Minim, L. J. de Azevedo-Silva, B. M. Ferrairo, L. F. Pereira, C. A. Goulart, R. S. Monteiro-Sousa, P. N. Lisboa, C. A. Fortulan, R. Saloma, A. F. S. Borges, H. Rubo
Summary: This study assessed the effects of adding polyvinyl butyral (PVB) in combination with two sintering methods on the mechanical properties of polycrystalline bovine HA bioceramics. The results showed that samples sintered using the conventional method without binders exhibited the best mechanical properties.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Ceramics
Rafael Salomao, Leandro Fernandes, Luiz Carlos Simao
Summary: This paper introduces a novel microporous MgO-based thermal insulator with temperature-resistant microporous structure. The controlled packing flaws were introduced among highly asymmetric and porous particles during uniaxial pressing. The study shows that thermal treatments have little effect on the microporous microstructure generated during pressing. The thermal conductivity, total porosity, and compression strength of the samples vary at different temperatures.
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)
