Article
Materials Science, Ceramics
Zhentao Wang, Tianyu Li, Jiamao Li, Feiwen Zhao, Ruzhong Zuo, Lei Zhang, Zhan Cheng, Dong Xu
Summary: (Al, Nb) co-doped TiO2 colossal dielectric ceramics were prepared using conventional sintering, flash sintering, and two-step flash sintering methods. The flash sintering and two-step flash sintering reduced processing temperature by 20% and sintering time by 30 times compared to conventional sintering. The two-step flash sintering samples with finer grain size exhibited higher permittivity. The TSFS ceramic sample sintered at 1080 degrees C showed the best overall performance with a dielectric constant of 1.4 x 105, dielectric loss of 0.57 at 1 kHz, and a nonlinear coefficient of 5.8. The excellent dielectric properties were attributed to the internal barrier layer capacitance model.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Mattia Biesuz, Andrea Ometto, Vaclav Tyrpekl, Monika Vilemova, Vincenzo M. Sglavo
Summary: The study found that the flash onset conditions in YSZ/Al2O3 composites are influenced by the amount of Al2O3, while the power density of the total composite and YSZ is sensitive to the composite composition and flash onset temperature.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Hassan Javed, Theo Saunders, Michael John Reece, Elisa Zanchi, Antonio Gianfranco Sabato, Aldo R. Boccaccini, Federico Smeacetto
Summary: Pressure assisted flash sintering was used to process Mn-Co-Cu based spinel coatings on a Crofer22APU interconnect, resulting in highly dense coatings heat-treated for a short duration at lower temperatures than conventional sintering. The electrophoretically deposited coatings showed no delamination or cracks after flash sintering at high heating rates (200 C/min), indicating the potential of flash sintering as a promising and time efficient technique to overcome issues related to low coating density and oxide scale formation in solid oxide electrolysis cell conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Vaclav Tyrpekl, Marco Cologna, Michael Holzhauser, Petr Svora
Summary: This paper investigates the process of flash spark plasma sintering (FSPS) and the densification process of Gd0.1Ce0.9O2-x powder, finding that low electrical fields are sufficient for flash sintering to occur. The study discusses the challenges of sintering ceria using FAST techniques due to its mechanochemical transformations.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Changhun Hwang, Jondo Yun
Summary: In flash sintering, the sintering atmosphere and sample thickness affect the flash onset temperature; samples with higher density and larger grain size have higher flash onset temperatures.
Article
Materials Science, Ceramics
Guillaume Riquet, Thomas Grippi, Christelle Harnois, Sylvain Marinel, Charles Maniere
Summary: In the field of flash sintering, microwave energy is used for densifying ceramics complex shapes through contactless volumetric heating. A novel multiple susceptors cascade strategy is developed using both SiC and 3D-printed ZrO2 susceptors, allowing for a fast and homogeneous flash hybrid heating. This study highlights the sintering behavior of zirconia and the temperature distribution during flash microwave sintering through comprehensive simulations, in situ dilatometry measurements, kinetics method analysis, and microstructural characterizations.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Charles Maniere, Christelle Harnois, Guillaume Riquet, Thomas Grippi, Stephanie Behar-Lafenetre, Sylvain Marinel
Summary: Microwave sintering is a method that allows ultra-rapid heating and control of the heating cycle. However, high heating rates can lead to thermal cracks and high porosity. Comprehensive simulations can determine the heating regime transition and cooling fluxes during the flash process.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Yue Cao, Guo-Cheng Xu, Lin Li, Hai-Rong Mao, Rui-Fen Guo, Ping Shen
Summary: Flash sintering and in situ joining of 3YSZ with metal were achieved under an electric field, leading to rapid densification. However, defects were present in the joints due to the application of a single AC or DC field. Electric field-induced Joule heating and internal electrochemical reaction were the key mechanisms for the sintering process.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
R. W. Harrison, J. Morgan, J. Buckley, S. Bostanchi, C. Green, R. White, D. Pearmain, T. Abram, D. T. Goddard, N. J. Barron
Summary: In this study, cerium dioxide was densified using conventional and field-assisted sintering techniques. The effects of various sintering parameters on the microstructure of the ceramics, including temperature, hold time, atmosphere, electric field strength, and polarity, were examined.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Syed I. A. Jalali, Alejandro F. Manchon-Gordon, Ricardo Chacartegui, Pedro E. Sanchez-Jimenez, Javier S. Blazquez, Antonio Perejon, Rishi Raj, Luis A. Perez-Maqueda
Summary: This work presents an extension of the touch-free flash sintering technique, where chemical reaction and sintering occur simultaneously in the presence of electric and magnetic fields, without the use of electrodes. The study demonstrates the production of a dense, single-phase strontium hexaferrite magnet from a mixture of commercial carbonate and oxide powders in just over a minute. This technique offers significant reductions in energy and time consumption compared to conventional sintering, primarily due to its ultrafast processing.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Murat Murutoglu, Tugce Ucun, Ozge Ulasan, Aligul Buyukaksoy, Yahya Kemal Tur, Huseyin Yilmaz
Summary: Cold sintering is a novel technique that enables the densification of ceramics at lower temperatures. In the experiment, successful cold sintering at room temperature resulted in slightly higher redox potential values compared to conventional sintering methods.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Ceramics
Subhadip Bhandari, Tarini Prasad Mishra, Martin Bram, Olivier Guillon, Devinder Yadav
Summary: Flash sintering of 8YSZ/NiO composites was studied, and it was found that the sintering atmosphere and NiO content strongly influenced the flash onset temperature and power dissipation. The current density could control the densification of the composites.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Camila Ribeiro, Luis Figueiredo, Ricardo Serrazina, Jose C. Almeida, Joana Salgado, Regina Santos, Helio Jorge, Alvaro Serra, Pedro Marcos, M. Elisabete Costa, Paula M. Vilarinho, Ana M. Senos
Summary: In this study, FLASH sintering technology was explored as an alternative process for producing porcelain stoneware. By using lower temperatures and shorter sintering times compared to conventional methods, FLASH sintering achieved successful sintering of porcelain stoneware. Decreasing the feldspar content led to more uniform microstructures and higher density. These findings illustrate the applicability of FLASH sintering and its importance for developing alternative sintering technologies in the traditional ceramic industry.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Pai Peng, Caohong Chen, Bing Cui, Jiamao Li, Dong Xu, Bin Tang
Summary: The effects of flash sintering on (Zr + Ta) co-doped TiO2 ceramics were investigated, and the results showed that flash sintering can reduce the sintering temperature, shorten the processing time, and increase the dielectric permittivity with increasing electric fields.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Fanbo Meng, Mingchang Zhang, Jin Huang, Wen Feng Lu, Jun Min Xue, Hao Wang
Summary: The study introduces a novel multinozzle, multimaterial printing device that addresses challenges in flexible device manufacturing, enhancing efficiency and stability in capacitor fabrication. Additionally, the interlayer reaction of materials improves battery performance, allowing for >2000 charge/discharge cycles with a high efficiency and capacity.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Andrea Zambotti, Francesco Valentini, Emanuele Lodi, Alessandro Pegoretti, Vaclav Tyrpekl, Sona Kohutekova, Gian Domenico Soraru, Matous Kloda, Mattia Biesuz
Summary: This study introduces the use of polymer-derived SiOC ceramic aerogel as a host for hygroscopic magnesium sulphate, providing a new approach for seasonal thermal energy storage with controllable porosity and rapid hydration while avoiding composite breakage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Spectroscopy
Michele Cassetta, Marco Zanatta, Mattia Biesuz, Marco Giarola, Gino Mariotto
Summary: Basalts are abundant igneous rocks with unique physico-chemical properties, making them increasingly used in glass and ceramic technology. Understanding the interplay between the structure and properties of basalt glasses is crucial for industrial exploitation.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Materials Science, Ceramics
Luca Spiridigliozzi, Claudio Ferone, Raffaele Cioffi, Gianfranco Dell'Agli
Summary: In this study, we used the cluster-plus-glue atom model to investigate the formation of fluorite-structured High-Entropy Oxides (HEOs), especially based on equimolar mixtures of Rare-Earth Oxides. We were able to confirm the effectiveness of our previously proposed empirical predictor, and also explained the role of Cerium and Zirconium in the formation of these HEOs. Additionally, we designed a novel non-equimolar system and successfully stabilized a bixbyite-like single phase.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Mattia Biesuz, Gino Mariotto, Michele Cassetta, Ovidiu Ersen, Dris Ihiawakrim, Petr Hausild, Paolo Giopato, Alessandro Martucci, Mauro Bortolotti, Vincenzo M. Sglavo, Gian D. Soraru
Summary: The application of a DC current enables fast Ag+ -> Na+ ion exchange in SLS glass. The effects of processing parameters, electric current, and treating time on both air and tin sides of SLS float glass are studied, revealing non-Fickian diffusion. The ion exchange kinetics are similar on both sides, but the structure/microstructure is vastly different. Clear silver nanoclustering occurs on the tin side, resulting in metallic particles near the surface. The formation of nanoparticles involves a deep structural reorganization.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Elena De Vita, Pasquale Di Palma, Sidrish Zahra, Giuseppina Roviello, Claudio Ferone, Agostino Iadicicco, Stefania Campopiano
Summary: This article proposes a hot-wire anemometer based on an optical fiber with a fiber Bragg grating (FBG) and a D-shaped transversal section with a thin metallic layer. The embedded FBG can measure the temperature increase and fluctuation caused by the wind flowing. Numerical simulations were performed to determine the appropriate design parameters, and the device was fabricated and tested to validate its working principle. The developed sensor has low power requirements, small size, high accuracy, cost-effectiveness, and adjustable wind sensitivity.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Ceramics
Andrea Zambotti, Emanuel Ionescu, Nicola Gargiulo, Domenico Caputo, Cekdar Vakifahmetoglu, Balanand Santhosh, Mattia Biesuz, Gian Domenico Soraru
Summary: By embedding porous polymer-derived ceramics (PDCs) within the open cells of a silicon carbide foam, the thermal conductivity of the foam can be significantly reduced, allowing for a combination of mechanical properties and insulating ability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Luca Spiridigliozzi, Mauro Bortolotti, Gianfranco Dell'Agli
Summary: Fluorite-structured Entropy-Stabilized Oxides (F-ESO) can be obtained using a multicomponent equimolar system based on cerium, zirconium, and other rare earth elements. The phase transition from multiple phases to a single-phase fluorite structure was confirmed through calcination at 1500 degrees C for 1 hour. High temperature X-ray diffraction analysis revealed an inverse correlation between the standard deviation and the entropy-driven transition temperature, indicating that higher standard deviation leads to lower transition temperature. These findings support the empirical predictor developed by the authors and suggest that high standard deviation contributes to the overall entropy of the system.
Article
Chemistry, Physical
Francesco Todaro, Francesco Colangelo, Sabino De Gisi, Ilenia Farina, Claudio Ferone, Claudia Labianca, Andrea Petrella, Raffaele Cioffi, Michele Notarnicola
Summary: This research proposes a cement-free cold granulation process for the remediation of contaminated marine sediments and the production of low-cost aggregates for civil engineering. The use of industrial by-products, coal fly ash and Blast Furnace Slag, as geopolymer precursors in the granulation process was investigated. The results showed that sediments treated with a specific mix design had optimal metal leachability and meet the technical requirements for pavement construction. Cold granulation was found to be a sustainable solution for recycling contaminated sediments and industrial by-products into lightweight artificial aggregates.
Article
Materials Science, Ceramics
Adam Alemayehu, Mattia Biesuz, Kimia Y. Javan, Alexander Tkach, Paula M. Vilarinho, Vincenzo M. Sglavo, Vaclav Tyrpekl
Summary: Ultrafast high-temperature sintering (UHS) is a rapidly growing research area in material science and engineering. In this study, single and multi-step approaches were used to UHS gadolinia-doped ceria (GDC) powders. The sintered ceramics were characterized both physically and electrochemically. With a gradual application of power during the multistep UHS process, crack-free GDC ceramics with 95% bulk density can be obtained using commercial powder. The same multistep sintering process using oxalate converted GDC powder resulted in 86% bulk density. It was also demonstrated that multistep UHS is suitable for multilayer cosintering necessary for solid oxide fuel cells (SOFC), as evidenced by the production of dense GDC electrolyte in tight contact with porous electrodes.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Geochemistry & Geophysics
Michele Cassetta, Gino Mariotto, Nicola Daldosso, Emanuele De Bona, Mattia Biesuz, Gian Domenico Soraru, Renat Almeev, Marco Zanatta, Francesco Vetere
Summary: In this study, we focused on the relationship between the bulk and shear moduli ratio and the melt fragility of parental glasses. By integrating data from different measurement methods, we were able to predict the viscosity of the Na2O-SiO2 system accurately during the liquid to glass transition.
Article
Chemistry, Physical
Mattia Biesuz, Jixi Chen, Mauro Bortolotti, Giorgio Speranza, Vincenzo Esposito, Vincenzo M. Sglavo
Summary: High-entropy oxides with rock salt structure are materials with intriguing functional properties, but elements like Ni in their composition pose a threat to human health. In this study, we successfully develop a Ni-free high entropy rock salt by replacing nickel with manganese. Through suitable thermal treatment, we obtain samples with high density and good phase purity, and demonstrate the electrical properties of the materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Manufacturing
Farid Salari, Paolo Bosetti, Vincenzo M. Sglavo
Summary: Powder-bed binder jet 3D printing of MOC cement-based components is a promising method, but the influence of processing factors on material performance has not been investigated. In this study, the effect of six key manufacturing factors on the modulus of rupture was analyzed, revealing the importance of particle size, binder amount, and layer thickness. A quadratic regression model was developed to aid in selecting optimal process parameters for desired material performance.
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING
(2022)
