Article
Materials Science, Ceramics
Sa Liu, Lina Mo, Gangyuan Bi, Shenggui Chen, Diwei Yan, Junzhong Yang, Yong-Guang Jia, Li Ren
Summary: This study developed a low viscosity ceramic slurry system by mixing 8-TCP with photosensitive acrylate resin for fabricating biocompatible DLP-printed scaffolds, which show promising potential in bone regeneration and biomedical applications.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Barak Ratzker, Avital Wagner, Sergey Kalabukhov, Nachum Frage
Summary: This study demonstrates a simple and effective method to improve the photoluminescence properties of Ce:YAG transparent ceramic phosphors through post-sintering heat treatments, resulting in a substantial increase in emission intensity and efficiency. This promising approach allows for microstructure tailoring to enhance photoluminescence and achieve more effective ceramic phosphors.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Juan Wang, Xiaoyu Wang, Qianlong Fu, Jinxiu Fu, Fengrui Zhai, Shuang Li
Summary: Silicon carbide ceramic membranes have been widely used in the treatment of corrosive and high temperature wastewaters. However, the high sintering temperature and energy consumption hinder the large-scale manufacturing of SiC ceramic membranes. In this study, a low melting-point glaze was used as a sintering aid to prepare a silicon carbide ceramic membrane support, which improved the fracture strength of the porous ceramics. The permeance and selectivity of the support were investigated, showing increased pure-water flux and decreased oil rejection with increasing trans-membrane pressure. This work provides a feasible route for low-energy consumption preparation of SiC porous ceramics.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Qiaolei Li, Yuxiang Qiu, Weiqiang Hou, Jingjing Liang, Hui Mei, Jinguo Li, Yizhou Zhou, Xiaofeng Sun
Summary: Vat photopolymerization 3D printing ceramic technology allows for the creation of complex internal cooling channels in aeroengine single crystal superalloy hollow blades. However, the typical layered structure of this technology leads to the anisotropy of ceramic core strength and sintering shrinkage, which negatively impacts the performance and accuracy of the complex structure cores.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Shuang Li, Yang Li, Chuncheng Wei, Peng Wang, Peiling Gao, Lijuan Zhou, Guangwu Wen
Summary: The fabrication route for silicon carbide membrane using boron carbide assistance in co-sintering process results in a reduction of sintering cycles and shorter preparation periods, as well as the formation of a straight and homogeneous selective layer on the substrate.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Coatings & Films
Zefei Zhang, Hao Chen, Yingqin Wang, Gang Wang, Lihong Li, Min Zhong, Hao Bai
Summary: This study provides a method for improving the performance of copper ceramic coatings by optimizing the key factor of SSWG-to-aggregate mass ratio in solid-state sintering. The research shows that an improper SSWG-to-aggregate mass ratio results in more internal defects and a decline in coating performance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Ka-Wai Yeung, Chak-Yin Tang, Ruien Hu, Chun-Hei Lam, Wing-Cheung Law, Gary Chi-Pong Tsui, Xin Zhao, Jacky Kin-Hung Chung
Summary: In this study, a susceptor-assisted microwave sintering approach was used to produce cenosphere foam scaffolds, and it was found that sintering could be achieved at a lower temperature compared to conventional heating. The as-fabricated cenosphere foam exhibited good support for cells, indicating its potential for cell engineering applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Ade Indra, Fauzan Hadi, Ismet Hari Mulyadi, Jon Affi, Gunawarman
Summary: Hydroxyapatite (HA) scaffolds were fabricated using the space holder method with a pressureless sintering process, achieving a compressive strength of 2.2 MPa at a porosity of 65.6% with a diameter shrinkage of 20.27%, and indicating a potential pore size shrinkage with increasing PMMA concentration.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jinxiu Fu, Shuo Sun, Juan Wang, Qianlong Fu, Xiaoyu Wang, Dong Wang, Shuang Li
Summary: A low-cost ceramic membrane was successfully prepared using fly ash as the main material and AlF3 as the catalyst. The influence of AlF3 content and sintering temperature on the synthesis of mullite whiskers and the permeance-selectivity of the ceramic membrane were investigated. The study provided a strategy for the preparation of mullite whiskers-constructed ceramic membrane with high porosity at low sintering temperature, facilitating the high-valuable utilization of fly ash.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Ceramics
Xun Sun, Zhenghao Tian, Ru Jiang, Haitao Liu
Summary: In this study, 3D fiber-reinforced oxide/oxide ceramic matrix composites were fabricated using a slurry infiltration and sintering (SIS) process. The effect of the SIS cycle on the microstructures and mechanical properties of the composite was investigated. The results showed that the SIS process led to densification of the porous matrix, resulting in improved flexural strength and interlaminar shear strength of the composite.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Yihao Wang, Qiurui Zhang, Haobo Zhang, Jincheng Lei
Summary: We propose a deep-learning-based method for localized porosity analysis of laser-sintered Al2O3 ceramic paste. A micro-pores detection and segmentation model is established using the Mask R-CNN, which can automatically detect and segment the micro-pores in SEM images. Different training strategies are investigated to optimize the accuracy of the model, and the optimal model trained by a 101-layer ResNet achieved an AP50 value of 0.894. The developed model is then applied to calculate the surface porosity profiles of laser-sintered Al2O3 strips processed at different laser powers.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Lingting Ye, Zhibo Shang, Kui Xie
Summary: This study demonstrates a novel method for the selective conversion of methane to ethylene in a solid oxide electrolyser with high selectivity and stability, showing promising potential applications in the chemical field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Metallurgy & Metallurgical Engineering
Sarojrani Pattnaik, Mihir Kumar Sutar
Summary: The study aimed to determine the optimal amount of saw dust to increase porosity of destroyable investment casting ceramic shells without compromising strength. Taguchi's methodology was used to optimize both slurry and shell responses based on saw dust secondary ceramic slurry. The study found 5 wt% saw dust substitution, 2:1 filler-to-binder ratio, and stirring time to be insignificant in influencing slurry and shell responses.
INTERNATIONAL JOURNAL OF METALCASTING
(2021)
Article
Materials Science, Ceramics
Jinxiu Fu, Zichao Li, Juan Wang, Qianlong Fu, Xiaoyu Wang, Pingke Yan, Yongsheng Li, Shuang Li
Summary: A fibrous ceramic membrane with mullite whiskers-interlocked structure was prepared using a gas-solid reaction. The addition of aluminum fluoride (AlF3) was found to affect the formation and growth of mullite whiskers and subsequently the permeability and selectivity of the ceramic membranes. By controlling the content of AlF3, the structure and performance of the membrane could be adjusted. At a sintering temperature of 1450℃, the porosity, flux, and oil rejection of the membrane increased significantly.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Shicheng Zhou, Xi Wang, Sen He, Xiuli Chen, You Wu, Huanfu Zhou
Summary: The phase composition, microstructural evolution, and densification behavior of NaAGeO4 (A = Sm, Y) ceramics with olivine structures were investigated. It was found that they have potential applications in microwave devices based on their performance parameters.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
V. B. Tinti, D. Marani, A. Kabir, A. B. Haugen, V. Esposito, D. Z. de Florio
Summary: A low-temperature chemical route was proposed in this study to prepare single-phase bismuth titanate samples, achieving lower temperature treatment and higher density, showing superior electrical properties. The samples exhibit high dielectric constant, low loss factor, and good piezoelectric characteristics.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Jin Kyu Han, Da Som Song, Yi Rang Lim, Wooseok Song, Sung Myung, Sun Sook Lee, Ki-Seok An, Ha-Kyun Jung, Simone Santucci, Vincenzo Esposito, Jongsun Lim
Summary: An unprecedented strategy for direct growth of perovskite piezoelectric barium titanate nanoparticles on two-dimensional graphene oxide was demonstrated to maximize the synergistic effects in enhancing the piezoelectric response of nanogenerators. The hybridization of BTO nanoparticles with graphene oxide improved the piezoelectric response compared to pristine BTO nanoparticles-based nanogenerators, due to the formation of homogeneous size distribution and the healing of oxygen vacancies in BTO crystals along with an enhancement in the crystallinity of GO through chemical reduction.
APPLIED SURFACE SCIENCE
(2021)
Article
Multidisciplinary Sciences
D-S Park, M. Hadad, L. M. Riemer, R. Ignatans, D. Spirito, V Esposito, V Tileli, N. Gauquelin, D. Chezganov, D. Jannis, J. Verbeeck, S. Gorfman, N. Pryds, P. Muralt, D. Damjanovic
Summary: This study breaks the crystallographic symmetry and induces large and sustainable piezoelectric effects in centrosymmetric materials. The experiment shows the generation of extraordinarily large piezoelectric responses in cubic fluorite gadolinium-doped CeO2-x films, which are two orders of magnitude larger than the responses observed in the presently best-known lead-based piezoelectric relaxor-ferroelectric oxide. This finding provides opportunities to design environmentally friendly piezoelectric materials.
Article
Chemistry, Physical
Jinkyu Han, Ahsanul Kabir, Victor Buratto Tinti, Simone Santucci, Da Som Song, So Young Kim, Wooseok Song, Eunyoung Kim, Sang Don Bu, Frank Kern, Daniel Zanetti de Florio, Vincenzo Esposito
Summary: In this study, a new electro-chemo-mechanical functional carbon-metal oxide hybrid material was successfully fabricated by coupling the spark plasma sintering (SPS) technique with the ball mill process. The hybrid materials display high ionic conductivity and electromechanical properties at room temperature, showing potential for various functional metal oxide composites.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Energy & Fuels
Albert Tarancon, Vincenzo Esposito, Marc Torrell, Marcel Di Vece, Jae Sung Son, Poul Norby, Sourav Barg, Patrik S. Grant, A. Vogelpoth, S. Linnenbrink, M. Brucki, T. Schopphoven, A. Gasser, Elif Persembe, Dionysia Koufou, Simon Kuhn, Rob Ameloot, Xu Hou, Kurt Engelbrecht, Christian R. H. Bahl, Nini Pryds, Jie Wang, Costas Tsouris, Eduardo Miramontes, Lonnie Love, Canhai Lai, Xin Sun, Martin Ryhl Kaern, Gennaro Criscuolo, David Bue Pedersen
Summary: The energy transition is a significant challenge and driving force for the scientific community. 3D printing offers great potential to automate the manufacturing of energy devices, improving performance and efficiency while reducing resource waste.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Engineering, Manufacturing
S. Anelli, M. Rosa, F. Baiutti, M. Torrell, V. Esposito, A. Tarancon
Summary: This study presents a new method for the fabrication of Solid Oxide Cells (SOCs) using self-standing robocast electrodes combined with inkjet printed electrolytes, completed through a cosintering process. Analysis and testing of the cells' characteristics confirmed the feasibility and reproducibility of this fabrication method.
ADDITIVE MANUFACTURING
(2022)
Article
Multidisciplinary Sciences
Haiwu Zhang, Nini Pryds, Dae-Sung Park, Nicolas Gauquelin, Simone Santucci, Dennis Christensen, Daen Jannis, Dmitry Chezganov, Diana A. Rata, Andrea R. Insinga, Ivano E. Castelli, Johan Verbeeck, Igor Lubomirsky, Paul Muralt, Dragan Damjanovic, Vincenzo Esposito
Summary: Electrostriction is a property of dielectric materials where a mechanical deformation is induced in response to an applied electric field. This study reports an engineered electrostriction effect achieved through the controlled interfaces of Gd2O3-doped CeO2 and Er2O3-stabilized delta-Bi2O3 on NdGaO3 substrates. The electrostriction coefficient achieved exceeds the best known materials by three orders of magnitude, and is attributed to the coherent strain from interfacial lattice discontinuity.
Article
Engineering, Manufacturing
Kyriakos Didilis, Debora Marani, Uffe Ditlev Bihlet, Astri Bjornetun Haugen, Vincenzo Esposito
Summary: This paper presents the technique of Freeform Injection Molding (FIM) and analyzes its ability in processing ceramic feedstocks. Through injection molding simulations to optimize parameters, the quality and performance of the samples were evaluated, and the related influencing factors were discussed.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Zhipeng Zhou, Venkata Karthik Nadimpalli, Aakil Raj Lalwani, Shu Wang, Yijing Shang, Zhihao Pan, David Bue Pedersen, Vincenzo Esposito
Summary: To enhance the oxidation resistance of porous metal components exposed to extreme conditions, a 3D-printed porous 410 L steel support with a novel ceramic multi-coating was developed. The support's simplified morphology with straight channels facilitates wet-chemical coating methods. The multi-coating method combining electrophoretic deposition and infiltration improves the interface between the ceramic and steel. The ceria-based coatings, exhibiting catalytic activity towards H2O and O2, offer both physical and dynamic chemical protection mechanisms. Electro-chemo-mechanical stability and superior corrosion resistance were demonstrated at 750°C in air-3% H2O for 122 hours (0.26 x10(-15) g(2) cm(4) s(-1)).
Review
Chemistry, Multidisciplinary
Haiwu Zhang, Milica Vasiljevic, Achilles Bergne, Dae-Sung Park, Andrea R. Insinga, Shinhee Yun, Vincenzo Esposito, Nini Pryds
Summary: Complex oxides with diverse functionalities are crucial for cutting-edge electronics, energy, and information technologies. This review explores how to engineer thermodynamic variables to break the symmetry of centrosymmetric oxides and achieve/improve their electromechanical properties. The mechanisms used to break the inherent symmetry of conventional materials and discover novel applications are discussed. Accessing hidden phases could uncover opportunities for exotic properties like piezoelectricity and pyroelectricity. This review not only reports on engineering nonpolar oxides but also has implications for manipulating polar functional materials for better performance.
ADVANCED MATERIALS INTERFACES
(2023)
Review
Energy & Fuels
Arindom Chatterjee, Carlos Nunez Lobato, Haiwu Zhang, Achilles Bergne, Vincenzo Esposito, Shinhee Yun, Andrea Roberto Insinga, Dennis Valbjorn Christensen, Carlos Imbaquingo, Rasmus Bjork, Hamsa Ahmed, Mariam Ahmad, Chun Yuen Ho, Morten Madsen, Jixi Chen, Poul Norby, Francesco Maria Chiabrera, Felix Gunkel, Ziwei Ouyang, Nini Pryds
Summary: Internet-of-thing (IoT) refers to a network of devices that collect and share data with each other through the internet, enabling access to raw information and facilitating intelligent decision making. With billions of IoT devices deployed, the challenge lies in creating self-powered units that can generate sufficient energy from ambient sources. This review paper discusses the recent progress in materials and device development for power and energy management in IoT applications, providing a comprehensive overview for new researchers and addressing challenges for those already in the field.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Jixi Chen, Alessandro Palliotto, Shinhee Yun, Dennis Valbjorn Christensen, Vincenzo Esposito, Nini Pryds
Summary: In this study, a method that combines synthesis optimization with a post-lithiation process is introduced to enhance the ionic conductivity of LLZO electrolyte. By compensating lithium loss and stabilizing the LLZO phase, the ionic conductivity is amplified by more than three orders of magnitude. The research also determines the optimal process conditions for the highest conductivity.
MATERIALS ADVANCES
(2023)
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
Water Resources
Vladimir Joel Alzamora Guzman, Julie Anne Glasscock
Summary: An analytical model of a strong free-surface water vortex was developed in this study, which calculates the maximum volumetric flow rate, air-core diameter, and rotational constant based on water head and geometric parameters. The simulated results showed excellent agreement with experimental observations using detailed data from a full-scale gravitational vortex hydropower system. This model does not assume a constant average velocity across the vortex radius, presenting advantages in turbine design for energy generation systems.
WATER SCIENCE AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Victor Buratto Tinti, Ahsanul Kabir, Jin Kyu Han, Sebastian Molin, Vincenzo Esposito
Summary: This study demonstrates large electrostriction in nanocrystalline 25 mol% praseodymium doped ceria (PCO) ceramics, showing superior performance comparable to, or even surpassing, traditional piezoelectric materials. Comparative analysis indicates that nanostructured PCO contains electromechanically active nanodomains, providing new insights into non-Newnham electrostrictors.
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)
