Article
Materials Science, Ceramics
Ming-Yueh Hsieh, Wen-Shiush Chen, Cheng-Hsing Hsu, Cheng-Hsuan Wu
Summary: This paper investigates the high-voltage insulation properties of epoxy resin samples with microadditives. It is found that adding 0.1 wt% KAlSi3O8 ceramic powders achieves the highest breakdown strength of 36.6491 kV/mm.
JOURNAL OF ASIAN CERAMIC SOCIETIES
(2022)
Article
Materials Science, Coatings & Films
Kirsten Bobzin, Wolfgang Wietheger, Elisa Burbaum, Tim Hosenfeldt, Nazlim Bagcivan, Mehmet Oete, Bjoern Mueller, Carsten Kunde, Anna-Lena Elsner
Summary: In this study, different thermally sprayed coatings were analyzed using impedance spectroscopy to evaluate their electrical properties. Equivalent circuit diagrams were used to calculate the relative permittivity of the coatings. The results showed that mullite-based coatings exhibited slightly higher impedance values compared to alumina-based coatings.
JOURNAL OF THERMAL SPRAY TECHNOLOGY
(2022)
Article
Polymer Science
Muhammad Tariq Nazir, Arslan Khalid, Imrana Kabir, Cheng Wang, Juan-Carlos Baena, Shakeel Akram, Muhammad Shoaib Bhutta, Ghulam Yasin, Bao Toan Phung, Guan Heng Yeoh
Summary: Room temperature vulcanized silicone rubber filled with aluminum trihydrate (ATH) is widely used for electrical outdoor insulation, but it lacks sufficient flame retardancy. Adding graphene nanoplatelets to ATH filled silicone rubber significantly reduces heat release rate and smoke release rate, while maintaining electrical insulation properties. This method is an effective approach to fabricate flame retardant silicone rubber with acceptable electrical insulation performance.
Article
Polymer Science
Andrzej Rybak
Summary: The study demonstrates that the epoxy composite filled with core-shell particles has improved thermal conductivity and mechanical properties, with minimal effects on rheological behavior and dielectric properties.
Article
Polymer Science
Yan Yu, Yan Zhao, Bin Huang, Yanwei Ji, Yunfeng Zhao, Zhijie Zhang, Hua- Feng Fei
Summary: This study investigates the effect of phenyl side groups on the dielectric properties of polysiloxane, and shows that introducing appropriate amount of phenyl side groups can improve the dielectric constant and electrical breakdown strength. The study also highlights the contribution of alpha- and beta-relaxations to the dielectric loss of the material.
Article
Materials Science, Ceramics
Qian Liu, Hua Hao, Zhen Liu, Minghe Cao, Zhonghua Yao, Marwa Emmanuel, Hanxing Liu
Summary: The addition of B-Al-Si glass in ceramics resulted in the appearance of quartz impurity phase and a decrease in average grain size. The samples met EIA X8R specifications and exhibited increased breakdown strength with higher glass content. Analysis of relaxation times showed that a lower ratio indicated a weakened interfacial polarization effect, enhancing the BDS performance.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
B. M. G. Melo, D. Blaskova-Kochnitcharova, S. Soreto Teixeira, E. Lefterova, P. Petkov, T. Petkova, L. C. Costa
Summary: Bulk samples of the ternary TiO2-V2O5-P2O5 system were synthesized using the melt-quenching technique. The structure and composition were identified using X-ray diffraction and scanning electron microscopy, with dielectric properties measured using impedance spectroscopy. Analysis of impedance spectra indicated a grain conductivity of 10-1 S/m at 190 degrees Celsius for the NASICON sample.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Wei Xu, Wenjing Tang, Zhengdong Li, Chunyuan Hu, Mingfeng Zhong, Zhijie Zhang
Summary: The novel CAP-based sintered glass-ceramic has a crystal structure similar to 8-TCP and a higher band gap, making it difficult for valence electrons to become free charges. The vacancy formed by Al replacing Ca acts as a capture site to prevent charge transmission, while the high activation energy of grain and grain boundary impedes charge movement. These factors contribute to the high dielectric breakdown strength of 110.5 +/- 5.3 kV/mm in the CAP-based glass-ceramic.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Jingjing Chen, Peng Zhao, Feng Si, Shuren Zhang, Zixuan Fang, Bin Tang
Summary: This study systematically investigates the dielectric characteristics, energy storage performance, and charge-discharge behavior of Yb-doped SBT ceramics. The results show that Yb doping can reduce grain size, improve insulation and thermal conductivity, and significantly enhance dielectric breakdown strength. High recoverable energy density and excellent energy storage efficiency are achieved at 300 kV/cm. In addition, Yb-doped SBT ceramics exhibit superior discharge rate, power density, and thermal stability, making them promising for applications in pulsed power systems.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Sachin Kumar, Suman Kumari, Vibhor Kumar, Jasvir Dalal, Anand Kumar, Anil Ohlan
Summary: This work investigates the electrical conductivity and dielectric relaxation phenomena in Li2O·B2O3 based glass and glass-ceramic materials. It is found that the electrical conductivity of glass-ceramic is lower than that of glass due to the presence of grain boundaries. The frequency-dependent behavior of electrical conductivity is analyzed using Jonscher's power law and shows semiconducting behavior. The ac conductivity mechanism follows the large polaron tunneling model. The relaxation mechanism is studied using electric modulus and impedance spectroscopy, revealing non-Debye type relaxation. A combined analysis of complex electric modulus and impedance spectroscopy is used to distinguish between grain boundaries and grains in the relaxation mechanism.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Ceramics
Zhe Xiong, Bin Tang, Xing Zhang, Chengtao Yang, Zixuan Fang, Shuren Zhang
Summary: The study found that LB glass as a sintering aid lowered the sintering temperature of BNTCN ceramics, and the doped LB glass had significant effects on the structure, grain size, and dielectric properties. Excellent microwave dielectric properties were achieved at 950 degrees Celsius, indicating that the BNTCN ceramic doped with 5 wt% LB glass is a promoting LTCC material.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Energy & Fuels
Qian Wang, Rui Liu, Sichen Qin, Xi Chen, Zicai Shen, Zhe Hou, Zeli Ju
Summary: This paper tests and evaluates the dielectric and insulation properties of XLPE materials with different service lives. The results show that as the service life increases, the performance of XLPE is affected, with an increase in dielectric loss and a decrease in dielectric strength, power frequency breakdown field strength, and crystallinity, and an increase in carbonyl index. The paper also reveals the degradation law of XLPE cable insulation.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2023)
Article
Materials Science, Ceramics
R. Lataoui, A. Triki, S. Hcini, A. Oueslati, S. Zemni, O. Kanoun
Summary: La0.6Sr0.4FeO3 ceramic with orthorhombic structure and phase purity was prepared by solid-state method. The electrical conductivity of the ceramic was investigated using dielectric measurements, showing a step-like behavior at low temperatures that can be described by two Jonscher equations. The conduction mechanism of grains follows the thermally activated hopping of small polaron model, while the grain boundaries are governed by the variable range hopping model.
JOURNAL OF ELECTROCERAMICS
(2023)
Article
Energy & Fuels
Emre Kantar
Summary: Understanding the breakdown at solid-solid interfaces is crucial in preventing insulation system failures. Literature reviews suggest non-uniform electric field distributions at these interfaces, with parameters like elasticity, pressure, surface characteristics, and ambient dielectric strength playing key roles in determining breakdown strength.
Article
Materials Science, Multidisciplinary
Yiwen Shi, Xiangrong Chen, Fan-Bo Meng, Zelin Hong, Muhammad Awais, Ashish Paramane
Summary: This study investigates the influence of three different voltage stabilizers on the insulation properties of cross-linked polyethylene (XLPE). The results show that the addition of the voltage stabilizers enhances the DC resistivity and DC breakdown strength of the XLPE, which also inhibits the accumulation of space charges in the XLPE.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Ceramics
Irene Ramon-Alvarez, Carolina Marugan-Cruz, Esther Enriquez, Sergio Sanchez-Delgado, Manuel Torres-Carrasco
Summary: This study focuses on developing alternative materials for Portland cement using industrial by-products. The chemical and physical properties of these materials were studied, and it was found that most of the alternative mortars manufactured in this study have better mechanical and thermal properties than Portland cement.
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2023)
Article
Materials Science, Ceramics
Rocio Estefania Rojas-Hernandez, Fernando Rubio-Marcos, Aida Serrano, Sara Roman-Sanchez, Jose Francisco Fernandez, Irina Hussainova
Summary: In this study, (hk0)-textured ZnAl2O4: Nd, Ce sub-micron films were synthesized using a screen printing technique assisted by a molten salt flux and deposited over the sapphire substrate. The focus was on controlling the Ce concentration in the emitting layers and determining the key parameters for the development of efficient ZnAl2O4-based films with remarkable optical properties. The degree of crystallinity and precise adjustment of texture were found to be crucial for improving NIR luminescence efficiency. Specifically, (hk0)-textured films developed at a sintering temperature of around 1300 degrees C exhibited higher NIR emission intensity compared to (hkl)-untextured films. This research demonstrates a feasible approach to achieve high NIR emission performance and validates its applicability for a wide range of applications.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Physical
Aida Serrano, Olga Caballero-Calero, Cecilia Granados-Miralles, Giulio Gorni, Cristina Manzano, Marta Rull-Bravo, Alberto Moure, Marisol Martin-Gonzalez, Jose F. Fernandez
Summary: This study demonstrates the use of a cold sintering process (CSP) to sinter CoSb3-based thermoelectric materials for the first time. The CSP yields samples with a relative density of 86% at 150℃ with a uniaxial pressure of 750 MPa, which is increased to around 92% after a post-annealing at temperatures ≥ 500℃ in Ar atmosphere. The CSP produces Te doped-CoSb3 nanocomposites with similar morphological and structural characteristics to the starting nanopowders obtained by ball milling in air atmosphere. The sintered thermoelectric nanocomposites exhibit a maximum figure of merit of 0.12(3) at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
C. Granados-Miralles, A. Serrano, P. Prieto, J. Guzman-Minguez, J. E. Prieto, A. M. Friedel, E. Garcia-Martin, J. F. Fernandez, A. Quesada
Summary: Due to their various applications, lithium ferrites are important materials for emerging technologies. The lithium content in lithium ferrites greatly affects their physical properties and the performance of devices based on these materials. In this study, magnetic lithium ferrite powders with different Li:Fe ratios were synthesized and the Li content was accurately determined using two independent methods. The sintering process led to substantial grain growth and the presence of trapped pores, while the magnetic properties and density of the ceramics were measured. The results provide valuable insights into the synthesis and characterization of lithium ferrites.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Ali Saffar Shamshirgar, Maria Fernandez Alvarez, Adolfo del Campo, Jose Francisco Fernandez, Rocio E. Rojas Hernandez, Roman Ivanov, Johanna Rosen, Irina Hussainova
Summary: This study incorporates graphene-augmented alumina nanofibers into epoxy resin to fabricate a tunable absorption multilayer structure for electromagnetic interference shielding and RF absorption. Highly aligned graphene augmented alumina nanofibers were produced using a hot wall one-step catalyst-free chemical vapor deposition method. The highest loss tangent of 0.4 was achieved in a composite containing 1 vol% of randomly oriented nanofibers. A superposed three-layer structure was fabricated, offering an absorption of >90% in the entire X-band and an absorption peak of -25 dB at around 11 GHz. The hybrid nanofibers with a dual loss function show potential for versatile design options in RF absorption.
Article
Optics
Paloma Lopez -Reyes, Nuria Gutierrez-Luna, Carlos Honrado-Benitez, Alvaro Rios-Fernandez, Esther Enriquez-Perez, Jose Chavero-Royan, Lucia Espinosa-Yanez, Juan I. Larruquert
Summary: Imaging at H Ly-alpha (121.6 nm) is important for astrophysics, solar, and atmosphere physics, but lacks efficient narrowband coatings. We report highly reflective AlF3/LaF3 narrowband mirrors at Ly-alpha prepared by thermal evaporation, with the highest reflectance (over 80%) obtained so far. We also present coatings for imaging at the OI doublet (130.4 and 135.6 nm) that reject intense Ly-alpha.
Article
Materials Science, Multidisciplinary
Fernando Rubio-Marcos, Paula Pamies, Adolfo Del Campo, Jordi Tiana, Jonathan Ordonez-Pimentel, Michel Venet, Rocio E. Rojas-Hernandez, Diego A. Ochoa, Jose F. Fernandez, Jose E. Garcia
Summary: A clear correlation between optical absorption and light-induced strain in ferroelectrics is shown. The phenomenon of photoinduced electronic reconstruction at charged domain walls is proposed as the primary physical mechanism. These results provide a new pathway for designing ferroelectric-based devices with new functionalities, such as thickness gradient-based photo-controlled nanoactuators.
APPLIED MATERIALS TODAY
(2023)
Article
Nanoscience & Nanotechnology
Victor Fuertes, Adolfo del Campo, Nicolas Gregoire, Philippe Labranche, Jose Francisco Fernandez, Younes Messaddeq
Summary: An in-depth study of nanoparticle-doped optical fibers using confocal Raman microscopy, Rayleigh light-scattering microscopy, and scanning electron microscopy (SEM) reveals the crystallization structures and size-dependent Raman shifts of YPO4 nanocrystals in the fiber core. The study also evaluates the Raman properties of the nanocrystals at different temperatures, observing linear phonon softening behavior. These findings provide new insights into the characteristics of nanoparticle-doped optical fibers and open up possibilities for further research in this field.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
A. Moure, P. Val-Gomez, A. del Campo, J. F. Fernandez, F. Rubio-Marcos
Summary: In this study, the stress dynamics and its temperature dependence arising from the Orthorhombic-Tetragonal Polymorphic Phase Boundary (PPB) in lead-free potassium sodium niobate (KNN)-based ceramics were investigated. The growth of Orthorhombic phases is limited by the high-temperature tetragonal phase distributions, and two main mechanisms regulate the decrease of stress processes: microstructural effects hinder the formation of non-180° domains, while ferroelectric domain distribution and local structural heterogeneity contribute to the phase transition widening.
MATERIALS & DESIGN
(2023)
Article
Instruments & Instrumentation
Alessio Sacco, Luisa Mandrile, Li-Lin Tay, Nobuyasu Itoh, Ankit Raj, Alberto Moure, Adolfo Del Campo, Jose F. Fernandez, Keith R. Paton, Sebastian Wood, Hyuksang Kwon, Tehseen Adel, Angela R. Hight Walker, Erlon Henrique Martins Ferreira, Ralf Theissmann, Thomas Koch, Andrea Mario Giovannozzi, Chiara Portesi, Andrea Mario Rossi
Summary: This article presents an interlaboratory comparison on Raman spectroscopy as a reliable method for quantification of TiO2 phases. Raman spectroscopy is a fast, non-invasive technique that can differentiate and measure TiO2 without the need for special reagents or sample preparation.
Article
Chemistry, Multidisciplinary
Jesus Carlos Guzman-Minguez, Cecilia Granados-Miralles, Patrick Kuntschke, Cesar de Julian Fernandez, Sergey Erokhin, Dmitry Berkov, Thomas Schliesch, Jose Francisco Fernandez, Adrian Quesada
Summary: This study aims to explore the magnetic properties of hard-soft composite permanent magnets and their correlation with microstructure. The experimental results show that increasing the particle size of the soft phase can enhance the remanence in injection molded magnets. Through experimental analysis and simulations, it is revealed that the interaction between the hard and soft phases is of a dipolar nature.
Article
Chemistry, Physical
Rocio E. Rojas-Hernandez, Fernando Rubio-Marcos, Jallouli Necib, Mati Danilson, Jose F. Fernandez, Irina Hussainova
Summary: Near-infrared (NIR) emitting phosphors are in high demand for their applications in various fields. This study focuses on synthesizing ZnAl2O4:Ce/Nd films of nanometer thickness for NIR emission using a cost-efficient approach. The use of polycrystalline alumina substrates enhances emission intensity. The concentration of Ce4+ influences NIR emission. The findings contribute to understanding film production processes and guide future studies on NIR emitters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
I. Mena-Prado, J. J. Reinosa, M. Fernandez-Garcia, J. F. Fernandez, A. Munoz-Bonilla, A. del Campo
Summary: In this study, biobased composite materials based on poly(lactic acid) (PLA) and poly(butylene adipate-co-tera-phthalate) (PBAT) were developed for antibacterial and compostable food packaging films. The incorporation of sodium hexametaphosphate microparticles (E452i) as antimicrobial filler and acetyl tributyl citrate (ATBC) as plasticizer improved the thermal stability, crystallinity, and mechanical properties of the films. The E452i particles also provided antimicrobial properties against Listeria innocua and Staphylococcus aureus, with bacterial reduction percentages higher than 50% in films with 5 wt% of particles. The films maintained their disintegradability under industrial composting conditions.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Environmental
S. Marin-Cortes, M. Fernandez-Alvarez, A. Moure, J. F. Fernandez, E. Enriquez
Summary: This study proposes a method for quantifying mixed construction materials through homogenization and chemometric modeling. It successfully applies this method to real CDW samples, enhancing their recycling potential in the ceramic industry and promoting CDW valorization and sustainability.
RESOURCES CONSERVATION AND RECYCLING
(2023)
Article
Materials Science, Ceramics
Victor Fuertes, Nicolas Gregoire, Philippe Labranche, Stephane Gagnon, Natalie Hamada, Sophie LaRochelle, Younes Messaddeq
Summary: This study discovers new materials and phenomena through nanoparticle doped optical fiber engineering under extreme synthesis conditions. The nucleation of isolated spherical SiO nanocrystals by controlling fiber drawing temperature is demonstrated, and the formation mechanism of crystalline SiO is discussed. The suitability of using SiO nanocrystals for fabricating Rayleigh scattering enhanced optical fibers is also shown.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
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)
