Article
Nanoscience & Nanotechnology
Subhadip Bhandari, Tarini Prasad Mishra, Olivier Guillon, Devinder Yadav, Martin Bram
Summary: Flash sintering is a novel technique that densifies ceramics at moderate furnace temperature and in short time. The mechanism behind flash sintering is not fully understood, but this study experimentally demonstrated that it is primarily dominated by Joule heating.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Yipeng Zhao, Hongwei Li, Guoqing Chen, Yakun Wang, Kang Wang, Xuesong Fu, Wenlong Zhou
Summary: A two-step sintering experiment was conducted to reduce the flash onset temperature and shorten the process time of (MgCoNiCuZn)O high entropy oxide. The flash onset temperature was effectively minimized by adjusting the first step heating process, resulting from the variation in conductivity and density of the compacts. The lowest onset temperature achieved was 307 degrees C at a 300 degrees C first step sintering. Subsequently, the as-sintered material with primarily rock-salt structure was obtained in just 20 s soaking time after the field-assisted flash sintering procedure. This novel two-step sintering method is expected to facilitate the rapid synthesis of high entropy oxides.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(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
Nanoscience & Nanotechnology
Qizhong Wang, Connor S. Watts, Christos E. Athanasiou, Zhenghong Dai, Mingyu Hu, Brian W. Sheldon, Nitin P. Padture
Summary: The atmosphere significantly affects the flash-sintering process, with the use of argon resulting in a dramatic reduction in the flash-onset furnace temperature for titania nanopowders. This leads to finer, more uniform grain sizes and lower, uniform porosity in the ceramics.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Rishi Raj, Avinash Kulkarni, Jean-Marie Lebrun, Shikhar Jha
Summary: Interest in ultrafast sintering is growing, with a focus on electric and electromagnetic field accelerations, as well as heating rates. Flash sintering, with its ability to quantitatively control and measure electric field, current density, and temperature, is becoming increasingly important for manufacturing. The rise in electrical conductivity and electroluminescence in flash sintering, and their potential significance in accelerated sintering, raise new fundamental questions in the science of flash sintering.
Article
Materials Science, Ceramics
Kumar Sadanand Arya, Ammar Eqbal, Pranav Rai, Devinder Yadav, Tamoghna Chakrabarti
Summary: This study assessed the role of Joule heating and thermal runaway on densification during flash sintering using both experimental and modeling approaches. The results showed that ultrafast densification observed during flash sintering cannot be explained solely by Joule heating and thermal runaway at low current density, but can be accounted for at higher current density.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Paper & Wood
Jianhua Ma, Haihong Pu, Pengxin He, Qiangli Zhao, Shaoxue Pan, Yaowu Wang, Chen Wang
Summary: Mechanically strong and highly conductive cellulose/carbon nanotube (CNT) composite fibers were successfully spun using an aqueous alkaline/urea solution, showing excellent mechanical strength and high electrical conductivity for applications in joule heating and humidity measurement.
Article
Chemistry, Physical
P. Ravi Teja, A. Raja Annamalai, Gecil T. Evangeline, Muthe Srikanth, Dinesh K. Agrawal, Chun-Ping Jen
Summary: In this study, bulk calcium cobaltite ceramics were synthesized using the traditional solid-state reaction method with subsequent sintering methods. It was found that spark plasma sintering led to higher densification and improved electrical properties compared to conventional sintering at elevated temperatures. The change in sintering temperature did not significantly impact the Seebeck coefficient for samples sintered via conventional sintering, while spark plasma sintered samples exhibited higher Seebeck coefficients at certain temperatures.
Article
Materials Science, Ceramics
Stefan Csaki, Frantisek Lukac, Jakub Veverka, Tomas Chraska
Summary: Ti3SiC2 MAX phase material was successfully prepared using spark plasma sintering, and the effects of atmosphere, dwell time, and SiC grain size on the material properties were studied. The results showed that the maximum MAX phase content of 90 wt% was achieved at a sintering temperature of 1550°C, with low porosity and high hardness.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Weiyin Chen, John Tianci Li, Zhe Wang, Wala A. Algozeeb, Duy Xuan Luong, Carter Kittrell, Emily A. McHugh, Paul A. Advincula, Kevin M. Wyss, Jacob L. Beckham, Michael G. Stanford, Bo Jiang, James M. Tour
Summary: Flash Joule heating (FJH) has been utilized to synthesize different fluorinated carbon allotropes including fluorinated nanodiamonds, fluorinated turbostratic graphene, and fluorinated concentric carbon in a solvent-free manner. The modification of electronic states and the presence of various short-range and long-range orders in these fluorinated carbon allotropes have been confirmed through spectroscopic analysis. The relationship between flash time and phase evolution as well as product compositions has been further demonstrated.
Article
Chemistry, Physical
Usha Kiran Sanivada, Dina Esteves, Luisa M. Arruda, Carla A. Silva, Ines P. Moreira, Raul Fangueiro
Summary: Smart textiles with nanomaterial coatings have shown promising potential in heating, sensing, and biomedical applications. By adding graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (CNTs) to polymeric resin, the textiles demonstrate electrical conductivity and heating capabilities. The study suggests that CNTs can replace higher concentrations of GNPs while achieving similar performance.
Article
Chemistry, Multidisciplinary
Ricardo Serrazina, Luis Pereira, Paula M. Vilarinho, Ana M. Senos
Summary: The demand for extremely low-temperature and short-time sintering techniques has led to the development of alternative ceramic processing. This study investigates the role of different atmospheres, humidity, and compact morphology in the Atmosphere-assisted FLASH sintering (AAFS) of nanometric Potassium Sodium Niobate (KNN), a lead-free piezoelectric material.
Article
Chemistry, Multidisciplinary
Paul A. Advincula, Jacob L. Beckham, Chi Hun Choi, Weiyin Chen, Yimo Han, Dmitry Kosynkin, Alexander Lathem, Alvaro Mayoral, Miguel Jose Yacaman, James M. Tour
Summary: We demonstrate the synthesis of a solvent- and gas-free 2D carbon nanotube/graphene network through flash Joule heating of pristine carbon nanotubes. The proportion of each morphology in the hybrid material can be controlled by varying the pulse time. Epoxy composites made with the hybrid material show significantly increased hardness and Young's modulus compared to neat epoxy, indicating that flash Joule heating can effectively convert carbon nanotubes into a hybrid network for reinforcement.
Article
Engineering, Environmental
Yishu Qiu, Zheng Hu, Hui Li, Qianqian Ren, Yanan Chen, Shi Hu
Summary: In this study, Ag/Co/C hybrid electrocatalyst for oxygen reduction reaction (ORR) was successfully synthesized via radiative flash Joule heating. The hybrid catalyst exhibits higher activity and stability in alkaline media compared to commercial Pt/C due to the strong interaction between silver and cobalt.
CHEMICAL ENGINEERING JOURNAL
(2022)
Review
Chemistry, Multidisciplinary
Kevin M. Wyss, Duy Xuan Luong, James M. Tour
Summary: This article reviews the current industrial methods for synthesizing and analyzing graphene, as well as recent advancements in larger-scale or sustainable synthesis of graphene. It focuses on the use of flash Joule heating as a rapid, efficient, and scalable method for producing graphene and other 2D nanomaterials.
ADVANCED MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Lin Zhang, Xingyu Li, Xuanhui Qu, Mingli Qin, Zhongyou Que, Zichen Wei, Chenguang Guo, Xin Lu, Yanhao Dong
Summary: Ultrafine-grained (UFG) refractory metals are promising materials for various applications, but achieving full density while maintaining a fine microstructure through sintering remains challenging. This article provides an overview of sintering issues, microstructural design rules, and powder metallurgy practices for UFG and nanocrystalline refractory metals. It also reviews previous efforts, including the use of fine/nanopowders and field-assisted sintering techniques, and highlights the recent technological breakthrough of pressureless two-step sintering for producing dense UFG refractory metals. Additionally, the progress of powder metallurgy in specific materials systems, such as elementary metals and refractory alloys, is discussed, and future developments towards UFG and nanocrystalline refractory metals with improved properties are outlined.
ADVANCED MATERIALS
(2023)
Article
Andrology
Xin-Xing Du, Yan-Hao Dong, Han-Jing Zhu, Xiao-Chen Fei, Yi-Ming Gong, Bin-Bin Xia, Fan Wu, Jia-Yi Wang, Jia-Zhou Liu, Lian-Cheng Fan, Yan-Qing Wang, Liang Dong, Yin-Jie Zhu, Jia-Hua Pan, Bai-Jun Dong, Wei Xue
Summary: We conducted a retrospective study to investigate the use of PD-1 inhibitor plus anlotinib as a potential solution for terminal mCRPC. The study showed that this combination treatment may be effective for patients with DDR or HRR pathway defects and warrants further investigation.
ASIAN JOURNAL OF ANDROLOGY
(2023)
Review
Chemistry, Multidisciplinary
Yanhao Dong, Ju Li
Summary: Recent progress has been made in high-energy-density oxide cathodes for lithium-ion batteries, but cycling under extreme conditions can lead to various forms of degradation that shorten battery life and cause safety issues. Understanding the underlying mechanisms of these degradations is critical for developing mitigation strategies. This systematic overview provides insights into the functions, instabilities, and materials behaviors of oxide cathodes, including unusual anion and cation mobilities and extensive lattice reconstructions. These insights are important for understanding self-healing phenomena and for designing and mitigating degradation in cathodes for high-performance energy storage.
Article
Chemistry, Multidisciplinary
Shitong Wang, Lijiang Zhao, Yanhao Dong, He Zhu, Yang Yang, Haowei Xu, Baoming Wang, Yakun Yuan, Yang Ren, Xiaojing Huang, Wei Quan, Yutong Li, Yimeng Huang, Charles M. Settens, Qi He, Yongwen Sun, Hua Wang, Zunqiu Xiao, Wenjun Liu, Xianghui Xiao, Riqiang Fu, Qiang Li, Yong S. Chu, Zhongtai Zhang, Qi Liu, Andrew M. Minor, Junying Zhang, Zilong Tang, Ju Li
Summary: Wadsley-Roth oxides (WROs) with pore diameters of 2.5 angstrom < d < 2.8 angstrom allow rapid diffusion of Li+ in single-crystal particles, enabling high-rate charge cycles similar to gasoline vehicles and improving the cycle life up to 10,000 cycles.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Wujie Dong, Yantao Zhao, Mingzhi Cai, Chenlong Dong, Wenqin Ma, Jun Pan, Zhuoran Lv, Hang Dong, Yanhao Dong, Yufeng Tang, Fuqiang Huang
Summary: High-capacity metal oxides based on non-toxic earth-abundant elements can be used as advanced anodes for lithium-ion batteries, but they often suffer from various problems. However, by using an easy synthesis method to construct an amorphous borate coating network, the conversion-type iron oxide anode can be stabilized, leading to high tap density, high capacity, good rate performance, and excellent cycling stability. This design can also be applied to other electrode materials and electrochemical devices.
Article
Energy & Fuels
Mingzhi Cai, Yanhao Dong, Miao Xie, Wujie Dong, Chenlong Dong, Peng Dai, Hui Zhang, Xin Wang, Xuzhou Sun, Shaoning Zhang, Moonsu Yoon, Haowei Xu, Yunsong Ge, Ju Li, Fuqiang Huang
Summary: This study develops a theory to address the oxygen loss and degradation of high-energy-density cathodes in lithium-ion batteries, and proposes a lantharizing process to regulate the near-surface structure of energy materials. Surface passivation, suppressed degradation, and improved electrochemical performance are demonstrated using LiCoO2 as an example. The high-voltage cycling stability has been greatly enhanced, up to 4.8 V versus Li+/Li, including in practical pouch-type full cells.
Article
Chemistry, Multidisciplinary
Linhui Chen, Rong-Ao Tong, Jingxi Zhang, Hailong Wang, Gang Shao, Yanhao Dong, Chang-An Wang
Summary: LLZTO is a promising garnet oxide material for all-solid-state lithium-metal batteries due to its high ionic conductivity, low electronic leakage, and wide electrochemical stability window. The use of a powder-form magnesium nitride additive promotes reactive wetting at the Li/LLZTO interface, reducing interfacial resistance and improving cycling stability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Ceramics
Yuanyuan Li, Bing Shen, Hongbing Yang, Guangkuo Hu, Desheng Yang, Jun Wang, Yanhao Dong, Jiangong Li
Summary: Centrifugal casting has been successfully applied in the preparation of Al2O3 ceramics with high strength and high reliability, but it has not been used for Al2O3 nanocrystalline ceramics with < 100 nm grain size due to the lack of high-quality alpha-Al2O3 nanoparticles. In this study, we overcame these challenges by using home-made dispersed alpha-Al2O3 nanoparticles and HCl-assisted casting under normal centrifuge conditions. The results showed that an ultra-uniform microstructure with 65 nm average grain size can be obtained by two-step sintering. The microhardness of the sintered Al2O3 nanocrystalline ceramic was measured to be 19.9 GPa, indicating potential softening at this grain size due to the inverse Hall-Petch relationship.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Minghao Yi, Yanhao Dong, Degang Deng, Shiqing Xu, Lei Lei
Summary: By simply adjusting the lithium citrate content, LiLuF4:15Tb particles with different shapes, including octahedral, distorted octahedral, and sphere, were controlled synthesized. The citric ion (Cit3-) was used as a strong stabilizer and structural guide agent. The shape evolution dependent on the citric ion content is also suitable for the LiYF4:15Tb system. The resulting LiLuF4:15Tb particle film is suitable for high-resolution X-ray excited optical luminescence imaging, providing a simple and novel route to study the shape-dependent optical properties of lanthanide-doped LiLuF4 crystals.
Article
Energy & Fuels
Moonsu Yoon, Yanhao Dong, Yimeng Huang, Baoming Wang, Junghwa Kim, Jin-Sung Park, Jaeseong Hwang, Jaehyun Park, Seok Ju Kang, Jaephil Cho, Ju Li
Summary: The researchers propose a new mechanochemical activation process that allows the synthesis of coarse single-crystal cathodes with high phase purity, good electrochemical performance, and scalability. This process is based on interfacial reactive wetting mediated by transient eutectic salts, which deagglomerates the precursors and enables particle coarsening into a single-crystalline morphology. The novel technique offers a facile and scalable solution for the production of high-quality single-crystalline cathode materials.
Article
Chemistry, Multidisciplinary
Yanhao Dong, Ju Li
Summary: Energy ceramics play important roles in high-temperature fuel/electrolysis cells and oxide batteries, but their stability is challenged by harsh chemical and electrochemical conditions. Understanding degradation mechanisms and developing innovative strategies for degradation mitigation are crucial for practical applications. This study analyzes and provides perspectives on degradation phenomena in different electrochemical devices, and discusses the stability and degradation of key ceramic components.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Physical
Clarita Regalado Y. Vera, Hanping Ding, Jagoda Urban-Klaehn, Meng Li, Zeyu Zhao, Frederick Stewart, Hanchen Tian, Xingbo Liu, Yanhao Dong, Ju Li, Meng Zhou, Hongmei Luo, Dong Ding
Summary: The influence of different dopants on the hydration ability of materials is not fully understood. This study reveals the effects of proton trapping and detrapping on material hydration and dehydration, which is important for understanding the hydration ability of proton-conducting oxides.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Ceramics
Yanhao Dong
Summary: There is growing interest in the long-term use of electrochemical devices under harsh conditions and field-assisted fast ceramic processing. This interest stems from the fact that extreme redox conditions can significantly increase the mobility of slow ions, resulting in accelerated microstructural evolution. Recent research has proposed a new mechanism involving strong electron-phonon interactions and dynamic electronic relaxations that lowers the ion migration barrier, explaining the enhanced slow ion kinetics observed in various experimental observations.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Jingxi Zhang, Xi Chen, Gang Shao, Hailong Wang, Yanhao Dong, Chang-An Wang
Summary: A crucial issue limiting the cycle life of lithium-ion batteries is the formation and growth of solid electrolyte interphases (SEIs) as well as other side reactions at the electrode-electrolyte interfaces. Prelithiation is an effective strategy to offset the lithium loss and extend the cycle life.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Zhikang Liu, Yanhao Dong, Xiaoqun Qi, Ru Wang, Zhenglu Zhu, Chao Yan, Xinpeng Jiao, Sipei Li, Long Qie, Ju Li, Yunhui Huang
Summary: This article introduces a method to mitigate short-circuiting caused by mechanical abuse in high-energy-density batteries by designing a structure of highly deformable separator/current collector composite. The researchers replaced the traditional aluminum foil with metalized plastic material as the current collector, which not only increased the energy density of the battery but also greatly improved its safety.
ENERGY & ENVIRONMENTAL SCIENCE
(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)
