Article
Chemistry, Physical
Hao Ding, Xue Guo, Jiao Li, Qiangqiang Hu, Haibin Sun, Zanzhong Yang, Guochang Li, Fangyong Yu, Chengfeng Li, Yishang Wang
Summary: Bi-doped BiSDC-BCSBi composites exhibit excellent sinterability and electrical performance, making them suitable for intermediate-temperature solid oxide fuel cells. The high conductivity and peak power density suggest promising applications in the field.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Elena G. Kalinina, Elena Yu. Pikalova
Summary: This work aims to form dense anode coatings of yttria-stabilized zirconia (YSZ) and samarium-doped barium cerate (BCS) on the Ce0.8Sm0.2O2- electrolyte to improve the performance of a single fuel cell. Various methods, such as precipitation, laser vaporization condensation, and citrate-nitrate method, were used to obtain YSZ and BCS materials. The study reveals the challenges in forming dense YSZ layers on SDC substrates due to delamination during high-temperature sintering, which can be alleviated by the use of a Pt buffer sublayer. The compatibility of BCS barrier layers with SDC was also demonstrated.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Elena G. Kalinina, Darya S. Rusakova, Kirill S. Shubin, Larisa V. Ermakova, Elena Yu. Pikalova
Summary: This study investigates the direct electrophoretic deposition (EPD) of thin-film Ce0.8Sm0.2O1.9 (SDC) electrolyte on porous nonconductive NiO-BaCe0.8Sm0.2O3 (BCS) and NiO-SDC substrates. The addition of Co3O4, TiO2, and Al2O3 oxides in the suspensions improves the electrolyte sintering. The introduction of nanosized SDC powder into the suspensions achieves high zeta potential values for stable deposition. Dense composite electrolyte membranes are obtained after sintering, and the influence of sintering additives on the electrical properties of the films are studied.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Sea-Fue Wang, Hsi-Chuan Lu, Yung-Fu Hsu, Piotr Jasinski
Summary: In this study, a nine-layer structure of intermediate-temperature solid oxide fuel cells (IT-SOFCs) is constructed using a simple method based on cost-effective tape casting, screen printing, and co-firing process. The tri-layer electrolyte used in the cells exhibits good continuity and a highly dense structure, resulting in lower area-specific resistance and higher open circuit voltage (OCV), leading to a higher maximum power density (MPD).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Kang Yuan, Chen Song, Gang Chen, Zhenyuan Xu, Haoran Peng, Xiaoliang Lu, Xiaojuan Ji
Summary: Low-pressure plasma spray technology was used to produce scandium-stabilized zirconia thin films for solid oxide fuel cells, with a focus on investigating the influence of spraying parameters on the microstructure of the films.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Multidisciplinary
In -Ho Kim, Dae-Kwang Lim, Yeon Namgung, Hohan Bae, Jun-Young Park, Sun-Ju Song
Summary: In this study, the electrochemical and transport properties of a perovskite-type proton conductor BZCYYb5311 were evaluated. The material showed high proton conductivity and exceptional chemical stability. It exhibited a proton conductivity of 98% compared to ionic conductivity at 600°C. The maximum power density in fuel cell mode and current density in electrolysis mode were calculated, indicating the potential of BZCYYb5311 as a fuel cell material.
Review
Chemistry, Multidisciplinary
Bingguo Zhao, Yadi Liu, Haoran Hu, Yangjun Zhang, Zezhi Zeng
Summary: Solid oxide fuel cells (SOFCs) have high efficiency and low emissions. However, their adoption has been limited due to the high operating temperature. This article summarizes the progress in developing low-temperature SOFCs through electrophoretic deposition over the past ten years, discussing key procedures such as substrate selection, suspension preparation, bubble elimination, and heat treatment. The article also provides suggestions for the future development of electrophoretic deposition to achieve large-scale commercialization of low-temperature SOFC electrolyte.
PROGRESS IN CHEMISTRY
(2023)
Article
Chemistry, Physical
A. P. Khandale, S. S. Bhoga
Summary: The dispersion of nanocrystalline Ce0.9Gd0.1O2-delta in superfine Sm1.5Sr0.5NiO4+delta is achieved using a modified precipitation technique, inhibiting grain growth and providing morphological stability. The concentration-dependent behaviors of ionic conductivity, surface exchange rate, and electrode polarization resistance are comprehended using a percolation model. Improvement in electrochemical performance is correlated to the nano crystallite size of Ce0.9Gd0.1O2-delta.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Materials Science, Ceramics
Zhangfa Huang, Zhijun Liu, Hua Hu, Jianxin Wang, Ming Chen, Baohua Cao, Qin Wang, Jun Yang, Wanbing Guan, Tongxiang Liang
Summary: A Co-containing composite cathode material with low thermal expansion coefficient and good compatibility has been prepared by the solid-liquid method. The cathode exhibits low polarization resistance and high power density, making it a promising material for intermediate temperature solid oxide fuel cells.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Qingwen Liang, Ping Tang, Jing Zhou, Jinghe Bai, Dan Tian, Xiaofei Zhu, Defeng Zhou, Ning Wang, Wenfu Yan
Summary: The addition of MgO and Fe2O3 can improve the microstructure and electrochemical properties of Gd0.2C0.8O2-delta electrolyte, reducing sintering temperature, increasing densification, and enhancing grain boundary conductivity. GDC-MF shows promising performance in intermediate-temperature solid oxide fuel cells.
FRONTIERS IN CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Wendi Yi, Yaopeng Tian, Chunling Lu, Biao Wang, Yaowei Liu, Shoushan Gao, Bingbing Niu
Summary: This study presents the development of a new perovskite oxide, BCZY, as a cathode material for SOFCs. The BCZY cathode demonstrates excellent stability, good ORR activity, and superior CO2 tolerance at intermediate temperatures. The results indicate that BCZY could be a potential cathode material for IT-SOFCs.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Seo Ju Kim, Jongmin Baek, Mingi Choi, Jongseo Lee, Wonyoung Lee
Summary: Engineering the anion defect, especially oxygen vacancy, at the electrolyte surface is crucial for improving the oxygen reduction reaction kinetics and enhancing the electrochemical performance of intermediate temperature solid oxide fuel cells. The precise control of defect chemistry through infiltration methods can significantly increase the maximum power density of the fuel cells, providing extended and more active reaction sites.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Ceramics
Hongtao Wang, Shouyue Wang, Yanting Huang, Haodong Yang, Zhen Zhang
Summary: This study investigates the influence of sintering additive and calcining temperature on the structures, morphologies, and conductivities of Ho3+ and Sm3+ co-doped CeO2 and NiO doped CeO2 samples. The addition of NiO and higher sintering temperature significantly increases the conductivities of the ceramic sheets. A fuel cell with NiO-HSDC and 1450-HSDC-2NiO as the membrane exhibits good performance at high temperatures, showing high current densities and power densities. The stability of the fuel cell is relatively good within the testing range.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Elena Kalinina, Elena Pikalova, Larisa Ermakova, Nina Bogdanovich
Summary: This study investigated the challenges of forming single and bilayer coatings based on Ce0.8Sm0.2O1.9 and CuO-modified solid state electrolytes on porous non-conducting NiO-SDC anode substrates using electrophoretic deposition. Various approaches were tested, and a new effective method involving the deposition of a platinum layer on the substrate was proposed. It was found that using reduced substrates can lead to cracking and in some cases, the destruction of the entire structure.
Article
Chemistry, Physical
Liyang Fang, Fan Liu, David Diercks, Praveen Kumar, Feng Zhao, Dong Ding, Chuancheng Duan
Summary: Solid oxide electrochemical cells (SOECs) are a highly promising clean energy technology that can efficiently convert chemical energy to electricity and produce chemicals from abundant resources. However, the current SOECs suffer from poor performance. In this study, a hybrid oxygen electrode material was designed, which significantly improved the electrocatalytic activities of the oxygen reduction and evolution reactions. The newly developed SOECs achieved exceptional performance for power generation and steam electrolysis, with high stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Nanoscience & Nanotechnology
A. Bellucci, M. Girolami, M. Mastellone, S. Orlando, R. Polini, A. Santagata, V Serpente, V. Valentini, D. M. Trucchi
Summary: This article discusses the significance of thermal and concentrated solar solid-state converters in high-temperature energy conversion, as well as the progress made by the authors in the design and development of nanostructured materials.
Article
Chemistry, Physical
Jiaojiao Xia, Haoran Guo, Guangsen Yu, Qiru Chen, Yulin Liu, Qian Liu, Yonglan Luo, Tingshuai Li, Enrico Traversa
Summary: In this study, 2D vanadium carbide was synthesized and used as an efficient electrocatalyst for electrocatalytic N-2 reduction reaction. The catalyst showed high NH3 yield rate and Faradaic efficiency, with theoretical calculations demonstrating low reaction barrier.
Article
Chemistry, Physical
Tingshuai Li, Jiaojiao Xia, Haohong Xian, Qiru Chen, Ke Xu, Yang Gu, Yonglan Luo, Qian Liu, Haoran Guo, Enrico Traversa
Summary: In this study, it is reported that Fe ion grafted on MoO3 nanorods can enhance the electron harvesting ability and the selectivity of H+ during the nitrogen reduction reaction in neutral electrolyte. The electrocatalyst showed remarkable ammonia yield and Faradaic efficiency under experimental conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biochemistry & Molecular Biology
Francesca Corsi, Francesco Capradossi, Andrea Pelliccia, Stefania Briganti, Emanuele Bruni, Enrico Traversa, Francesco Torino, Albrecht Reichle, Lina Ghibelli
Summary: This study established a reliable in vitro model to investigate therapy-induced prostate cancer repopulation and found that epigenetic reprogramming assists Phoenix Rising in promoting post-therapy cancer cell repopulation and acquired resistance.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Matteo Mastellone, Maria Lucia Pace, Mariangela Curcio, Nicola Caggiano, Angela De Bonis, Roberto Teghil, Patrizia Dolce, Donato Mollica, Stefano Orlando, Antonio Santagata, Valerio Serpente, Alessandro Bellucci, Marco Girolami, Riccardo Polini, Daniele Maria Trucchi
Summary: This article primarily introduces the theoretical models of Laser-Induced Periodic Surface Structures (LIPSS) and their applications in the surface structures of wide bandgap semiconductors and dielectric materials. It discusses the role of radiation surface electromagnetic waves and Surface Plasmon Polaritons in LIPSS formation, along with experimental evidence. It also highlights the use of non-conventional techniques for LIPSS formation to improve surface structure homogeneity and control the electronic properties of materials. These studies are of great significance for applications in innovative devices.
Article
Chemistry, Physical
Shuyue Dong, Jiaojiao Xia, Hexin Zhu, Xiangning Du, Yang Gu, Qian Liu, Yonglan Luo, Qingquan Kong, Haoran Guo, Tingshuai Li, Enrico Traversa
Summary: In this study, a method for electrochemical synthesis of ammonia using ZrO2/C catalyst is proposed. Compared to the traditional Haber-Bosch process, this method saves energy and reduces pollution. Experimental results demonstrate that the catalyst can efficiently convert nitrogen to ammonia at ambient conditions.
Article
Chemistry, Multidisciplinary
Andrea Orsini, Daniele Barettin, Federica Ercoli, Maria Cristina Rossi, Sara Pettinato, Stefano Salvatori, Alessio Mezzi, Riccardo Polini, Alessandro Bellucci, Matteo Mastellone, Marco Girolami, Veronica Valentini, Stefano Orlando, Daniele Maria Trucchi
Summary: Black diamond, treated with femtosecond laser, can achieve a solar absorptance greater than 90% and has high electrical conductivity. The investigation of charge transport mechanisms on the laser-treated diamond surface reveals changes at low temperatures and suggests the influence of electron spin. These properties provide new possibilities for designing diamond-based biosensors and understanding the charge-carrier transport in black diamond is crucial.
Article
Materials Science, Ceramics
A. Bellucci, B. Pede, M. Mastellone, V. Valentini, R. Polini, D. M. Trucchi
Summary: Thin films of nanocrystalline diamond were deposited on highly doped p-type silicon substrates to evaluate the electron emission performance under concentrated sunlight. By comparing the emitted current densities using different light sources, it was found that the concentrated light source increased the emitted current up to 80 times at 600°C, demonstrating the boost on thermionic emission. At temperatures higher than 600°C, the photon-enhanced thermionic emission (PETE) mechanism started to vanish, transitioning to pure thermionic emission. The reduction of the barrier height to 0.33 eV due to the opening of quasi-Fermi levels explained the behavior of the diamond-silicon system in the PETE regime.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Matteo Mastellone, Alessandro Bellucci, Marco Girolami, Valerio Serpente, Riccardo Polini, Stefano Orlando, Veronica Valentini, Antonio Santagata, Barbara Paci, Amanda Generosi, Marco Guaragno, Daniele M. Trucchi
Summary: An array of 2500 vertical graphitic microwires was created within a single-crystal diamond plate to develop electrically conductive structures for high-temperature electronic devices. The structural and electrical properties were investigated up to 550 degrees C, with the microwires displaying high-aspect-ratio and linearly decreasing electrical resistivity with temperature. Raman spectroscopy results indicate no structural changes after high-temperature operations.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Alessandro Bellucci, Valerio Campanari, Matteo Mastellone, Patrick 'Keeffe, Alessandra Paladini, Riccardo Polini, Daniele M. Trucchi
Summary: The inclusion of Al nanoparticles in CVD diamond structures was achieved by depositing Al thin films on CVD diamond plates and encapsulating them with a diamond thin film. The composite structure formed by Al/diamond includes Al NPs and Al2O3 islands in the diamond matrix. The transmission spectrum follows a Rayleigh-like scattering induced by the nanoporous diamond film.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Massimo Tomellini, Riccardo Polini
Summary: This article introduces an analytical mean field approach to describe the time evolution of film growth by seeding. The model considers the anisotropic growth with different growth rates and includes spatial correlation effects among seeds through hard-core interactions. The approach provides closed form solutions for mean film thickness and has been validated with experimental data. This study is significant for determining optimal growth conditions for ultrathin nanocrystalline diamond (NCD) film.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Analytical
Matteo Mastellone, Eleonora Bolli, Veronica Valentini, Stefano Orlando, Antonio Lettino, Riccardo Polini, Josephus Gerardus Buijnsters, Alessandro Bellucci, Daniele Maria Trucchi
Summary: Polycrystalline boron-doped diamond films were nanotextured by femtosecond pulsed laser, leading to an increase in graphite surface content. The laser-induced alterations resulted in the formation of ordered carbon sites and two types of surface patterning were observed: irregular ripples for lower fluences and regular laser-induced periodic surface structures (LIPSS) for higher fluences.
Article
Chemistry, Multidisciplinary
Andrea Orsini, Daniele Barettin, Sara Pettinato, Stefano Salvatori, Riccardo Polini, Maria Cristina Rossi, Alessandro Bellucci, Eleonora Bolli, Marco Girolami, Matteo Mastellone, Stefano Orlando, Valerio Serpente, Veronica Valentini, Daniele Maria Trucchi
Summary: A recent innovation in diamond technology involves the development of black diamonds (BD), which have high optical absorption due to processing with a femtosecond laser. This study investigates the optical behavior of BD samples and demonstrates a near zero dielectric permittivity under high electric field conditions, exhibiting the Frenkel-Poole effect. The discovery of such zero-epsilon materials (ENZ) is expected to significantly advance integrated photonic devices and optical interconnections, leading to the development of novel functional photonic devices based on BD.
Article
Chemistry, Multidisciplinary
Raffaella Salerno, Biagio Pede, Matteo Mastellone, Valerio Serpente, Veronica Valentini, Alessandro Bellucci, Daniele M. Trucchi, Fabio Domenici, Massimo Tomellini, Riccardo Polini
Summary: We have conducted an experimental study on the etching of detonation nanodiamond (DND) seeds during microwave chemical vapor deposition (MWCVD) conditions. This study is important for the formation of ultra-thin diamond films and various technological applications. The kinetics of seed disappearance were explained using a model based on the effect of particle size on the chemical potential of carbon atoms in DND and the activation energy of the reaction with atomic hydrogen. The model allowed for the estimation of rate coefficients for growth and etching.
Meeting Abstract
Cell & Tissue Engineering
Sara Maria Giannitelli, Manuele Gori, Miranda Torre, Pamela Mozetic, Franca Abbruzzese, Marcella Trombetta, Enrico Traversa, Lorenzo Moroni, Alberto Rainer
TISSUE ENGINEERING PART A
(2022)
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
