Article
Materials Science, Multidisciplinary
S. Khanahmadi, S. M. Masoudpanah
Summary: NiCo/(Ni,Co)O/(Ni,Co)Fe2O4 composites were prepared in-situ by solution combustion method. The presence of Ni(1-x)Co(x) phase instead of pure Ni and Co phases was confirmed by magnetic properties. The combusted composites exhibited spongy microstructure without any special morphology for various phases.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Chemical
Hugo Spiridigliozzi, Olivier Rouleau, Andrei Kanaev, Freïdeïric Schoenstein
Summary: We describe a controlled synthesis method of MAl2O4 (M = Mg, Co, Ni, Zn, Ba) nanopowders. The method involves three main steps: growth of ultraporous nanofibrous Al2O3 (UPA) monoliths, M-nitrate impregnation, and heat treatment. The formation of desirable nanocrystallites, such as spinel structures below 10 nm, was achieved. This synthesis route has potential applications in the fabrication of functional materials for various fields.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Mingkun Xia, Yan Zhang, Jiangyue Xiao, Peng Zhao, Zhongjun Hou, Fanglin Du, Dawei Chen, Shuo Dou
Summary: Recently, the use of external magnetic fields to modulate catalytic activities in electrocatalysis reactions has gained attention. In this study, an external magnetic field was employed to synthesize (Ni, Zn)Fe2O4 spinel oxide. Results showed that the magnetic field affected the morphology of the catalyst, resulting in uniform nanosphere particles with coral-like nanorods due to the presence of Fe ions. The valence state of Fe also regulated the electronic structure of the catalyst, altering the bonding of metal to oxygen atoms in different spinel sites.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2023)
Article
Environmental Sciences
Alexandra Filova, Agata Fargasova, Marianna Molnarova
Summary: This study observed the effects of Cu, Ni, and Zn on the growth and photosynthetic pigment levels of the alga Raphidocelis, while also investigating stress responses and their correlation with metal accumulation. Significant stimulation of -SH groups and TBARS content by Zn, Cu, and Ni were observed, with Cu showing the highest TBARS levels. Positive correlation between Cu accumulation and TBARS was found, while carotenoids showed mostly negative correlations with TBARS as possible antioxidants.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Sijia Shen, Hongbo Li, Yanxiang Liang, Chuanyun Wang, Jiahong Niu, Nanming Feng, Ning Zhang, Lingwei Yang
Summary: This work studied the microstructural evolution and mechanical properties of Ni/Al nanolaminates with varying Ni mole ratio. It was found that the strength of the nanolaminates was enhanced after heat-treatment. A novel NiAl3/Ni2Al3 nanolaminate structure formed when the Ni mole ratio was 0.40, resulting in maximized strength. A homogeneous nanocrystalline NiAl phase formed when the Ni mole ratio was 0.53, leading to excellent ductility and intermediate strength.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Bihao Hu, Peng Chen, Chuanlan Xu, Jiazhi Meng, Jinliang Cai, Ying Yang, Biao Zhang, Danmei Yu, Xiaoyuan Zhou, Changguo Chen
Summary: In this study, a bimetallic nickel zinc catalyst with hierarchical morphology was successfully synthesized and shown to have excellent catalytic activity and selectivity in borohydride oxidation reaction. The study also demonstrated a high peak power density in a direct borohydride fuel cell with the catalyst as anode.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Hong Li, Xinxin Shu, Peiran Tong, Jihui Zhang, Pengfei An, Zhengxing Lv, He Tian, Jintao Zhang, Haibing Xia
Summary: Fe-Ni ANC@NSCA catalysts anchored on N, S co-doped carbon aerogel were successfully prepared by optimal pyrolysis of polyaniline aerogels derived from the freeze-drying of PANI hydrogels obtained by the polymerization of aniline monomers in the co-presence of tannic acid, Fe3+, and Ni2+ ions. These catalysts showed excellent performance in both oxygen reduction reaction and oxygen evolution reaction, surpassing state-of-the-art commercial catalysts.
Article
Materials Science, Ceramics
Wenwu Zhou, Long Chen, Sheng Zhuo, Rong Peng, Danxia Yu, Ping Fang, Yue Liu, Weifan Chen
Summary: Superfine CaLaAl1-xCrxO4 red ceramic pigments were prepared through solution combustion reaction and high-temperature calcination, showing well-dispersed and uniform particle size. Increasing the doping amount of Cr3+ ion led to decreased brightness value and increased redness value of the pigments, with x = 0.08 demonstrating the best chromatic performance. Additionally, the synthetic pigments exhibited excellent high temperature stability and cost-effectiveness for industrial applications.
CERAMICS INTERNATIONAL
(2022)
Article
Crystallography
Mir Waqas Alam, Muhammad Aamir, Mohd Farhan, Maryam Albuhulayqah, Mohamad M. Ahmad, C. R. Ravikumar, V. G. Dileep Kumar, H. C. Ananda Murthy
Summary: The synthesis of NiO-CuO-ZnO transition nanometal oxides by a simple solution combustion method resulted in nanoparticles with distinct phases and small particle sizes of 25-60 nm, with energy bandgap values of 1.63, 3.4, and 4.2 eV for CuO, ZnO, and NiO respectively. These oxides showed moderate efficiency in degrading AR88 dye and are suitable for photocatalytic applications, with potential for sensor use as indicated by electrochemical studies.
Article
Chemistry, Physical
Haihua Wu, Juanjuan Zhai, Feng Wu, Jiahao Wu, Yudan Li, Xin Xu, Yunfang Gao
Summary: A novel bifunctional oxygen electrocatalyst with Fe0.64Ni0.36 nanoalloy encapsulated in nitrogen-doped porous carbon nanotubes (FeNi@N-CNTs) was synthesized from Ni-modified Prussian blue. Electron transfer from the inner nanoalloy to the N-CNTs surface modulates its electron state for enhanced ORR/OER catalysis. The mesoporous structure in N-CNTs facilitates rapid mass transport.
Article
Materials Science, Multidisciplinary
K. C. Dhanyaprabha, Bibin Jacob, Manoj Mohan, Imaddin A. Al-Omari, Salim H. Al-Harthi, Myo T. Z. Myint, Hysen Thomas
Summary: BaTiO3-Ni(1-x)Zn(x)Fe2O4 multiferroic composites with varying magnetic phases are prepared using sol-gel and polyol method. The physical and chemical properties of the systems are studied. The multiferroic property of the composites is confirmed by analyzing the ferroelectric P-E loop and magnetic M-H loop. The BaTiO3-Ni0.5Zn0.5Fe2O4 composite exhibits enhanced magnetoelectric coupling.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Physical
K. Huang, C. Rong, W. Zhang, X. Yang, Y. Fan, L. Liu, Z. Yang, W. Chen, J. Yang
Summary: A one-pot strategy was proposed to produce porous carbon electrocatalysts multidoped by nickel, cobalt, zinc, and nitrogen. The resulting Ni-Co-Zn-N-PC showed superior ORR catalytic performance and anti-interference properties, making it promising for practical energy conversion devices.
MATERIALS TODAY ENERGY
(2021)
Article
Thermodynamics
Marieta K. Zakaryan, Narine H. Amirkhanyan, Khachik T. Nazaretyan, Suren L. Kharatyan, Khachatur V. Manukyan
Summary: This work presents the combustion synthesis mechanism using hexamethylenetetramine as fuel and nickel nitrate as oxidizer. Detailed investigations reveal the multistage decomposition of the oxidizer and sublimation of the fuel, resulting in the release of nitrogen, hydrazine, and methane. The highly exothermic reactions between nitrogen oxides emitted during the decomposition of the oxidizer and methane and hydrazine determine the maximum temperature of combustion. Excessive amounts of hydrazine and methane reduce nickel oxide to nanoscale nickel, which readily consolidates into samples of high relative densities.
COMBUSTION AND FLAME
(2023)
Article
Materials Science, Multidisciplinary
S. Ramesh, L. N. Patro, B. Dhanalakshmi, B. Chandrasekhar, T. Anil Babu, K. Chandra Babu Naidu, B. Parvatheeswara Rao
Summary: The magnetic properties of Ni0.4Zn0.6-xCoxFe2O4 (Ni-Zn-Co) and Ni0.4Zn0.6-xMnxFe2O4 (Ni-Zn-Mn) ferrites with different dopant concentrations were studied. The formation of single phase spinel crystal structure was confirmed in all the samples. The influences of dopant concentration and synthesis method on the magnetic properties, including Curie temperature, saturation magnetization, and coercivity, were investigated. The distribution of cation and exchange interactions were found to be responsible for the observed trends.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Hao Jiang, Jing Xia, Long Jiao, Xiangmin Meng, Pengfei Wang, Chun-Sing Lee, Wenjun Zhang
Summary: In this study, a bifunctional electrocatalyst composed of individually dispersed Ni single atoms on N-doped carbon nanosheets (Ni SAs-NC) was synthesized and demonstrated to exhibit outstanding performance for both oxygen reduction reaction (ORR) and urea oxidation reaction (UOR). By coupling ORR with UOR of low thermodynamic potential, a urea-assisted rechargeable Zn-air battery (ZAB) with significantly decreased charging voltage and high urea elimination rate was achieved. The high bifunctional electrocatalytic activities of Ni SAs-NC resulted in a dramatically increased energy conversion efficiency of 71.8%, improving conventional ZABs by 17.1%. This successful implementation of Ni SAs-based urea-assisted ZABs with improved energy conversion efficiency may advance practical applications of ZAB technology.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Engineering, Biomedical
Guillermo Grazioli, Adriana F. Silva, Jaqueline F. Souza, Carla David, Lisiane Diehl, Manoel D. Sousa-Neto, Sergio S. Cava, Andre R. Fajardo, Rafael R. Moraes
Summary: Novel PVA/CS composite hydrogels containing HA or HASr particles were successfully synthesized with promising morphological, mechanical, and swelling properties, suitable for scaffolding applications.
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
(2021)
Article
Energy & Fuels
Joelda Dantas, Elvia Leal, Antonio B. Mapossa, Julyanne R. M. Pontes, Normanda L. Freitas, Pollyana C. R. Fernandes, Ana Cristina F. M. Costa
Summary: The use of Ni0.5Zn0.5Fe2O4 magnetic nanoparticles as catalyst enables sustainable production of biodiesel from waste oils, with scalable synthesis and confirmed suitability based on MNPs properties and quality measures.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Spectroscopy
Rafael Uarth Fassbender, Veronica de Carvalho Teixeira, Douglas Galante, Mateus Ferrer, Pedro Lovato Gomes Jardim, Cristiane Raubach Ratmann, Sergio da Silva Cava, Mario Lucio Moreira
Summary: This study discusses the local and global distortions on the structural and electronic levels for BaZrO3 synthesized via microwave assisted hydrothermal method, showing that the doping ions induce distortions in the ZrO6 clusters. The understanding of the structural and electronic features establishes a solid basis for further studies in optical applications of co-doped BZO.
JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA
(2021)
Article
Energy & Fuels
Adriano Lima da Silva, Ana Flavia Felix Farias, Joao Baptista da Costa Agra de Melo, Alisson Mendes Rodrigues, Simoni Margareti Plentz Meneghetti, Ana Cristina Figueiredo de Melo Costa
Summary: The MoO3 catalyst was successfully synthesized on a pilot scale by combustion reaction, and showed promising catalytic performance in the production of biodiesel, with high conversion to ethyl esters and long activity life. These catalysts have the potential to have positive impacts on the environment and society.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Biomedical
Cristiane C. Vital Cintra, Dayana A. C. Ferreira-Ermita, Fabricia H. Loures, Pascally M. A. G. Araujo, Iara M. Ribeiro, Fabiana R. Araujo, Fabricio L. Valente, Emily C. Carlo Reis, Ana Cristina F. M. Costa, Sheila M. C. M. Bicalho, Andrea P. B. Borges
Summary: This study characterized and analyzed the biocompatibility of six biomaterials formulated with different concentrations of hydroxyapatite and cobalt ferrite nanoparticles, along with the antibiotic ciprofloxacin. The results showed that these biomaterials have high crystallinity, complex surface structures, and effective inhibition of Staphylococcus aureus growth in vitro. In vivo experiments on rabbits demonstrated their biocompatibility and lack of inflammatory or toxic effects.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
(2022)
Article
Materials Science, Multidisciplinary
Gislayne Rayane Alves da Silva, Claudia Patricia Fernandez Perdomo, Rodolfo Foster Klein-Gunnewiek, Ruth Herta Goldschmidt Aliaga Kiminami
Summary: The study analyzed the crystallization kinetics and structural characterization of the NBT-BT6 system, revealing the initial crystallization process of NBT-BT6 at 450 degrees C, with a formation energy between 121 and 167 kJ/mol. The results of DSC analysis confirmed the formation of the ferroelectric NBT-BT6 phase at 270 degrees C, with the obtained nanopowders showing coexistence of rhombohedral and tetragonal structures at 650 degrees C.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Composites
Carlos Bruno Barreto Luna, Adriano Lima da Silva, Danilo Diniz Siqueira, Edson Antonio dos Santos Filho, Edcleide Maria Araujo, Emanuel Pereira do Nascimento, Ana Cristina Figueiredo de Melo Costa
Summary: In this study, magnetic and flexible nanocomposites of PA6/SEBS-MA were prepared using Ni-Zn ferrite synthesized by combustion reaction. Thermal treatment increased crystallinity, while ferrite calcination enhanced magnetic properties. The nanocomposites showed improved impact strength and elongation, retaining thermal properties of PA6.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Composites
Carlos Bruno Barreto Luna, Eduardo da Silva Barbosa Ferreira, Adriano Lima da Silva, Edcleide Maria Araujo, Ana Cristina Figueiredo de Melo Costa, Renate Maria Ramos Wellen
Summary: The effect of mixing protocol was investigated in nanocomposites based on polyamide 6 (PA6) and maleic anhydride grafted ethylene-propylene-diene (EPDM-MA) using Ni-Zn ferrite as filler. The results showed that the PA6/EPDM-MA mixture exhibited super-tough behavior, but with a loss in elastic modulus and heat deflection temperature due to high flexibility. The nanocomposites toughened with Ni-Zn ferrite achieved the highest impact strength when all components were simultaneously mixed, and displayed magnetic responses with potential for producing magnetic films.
POLYMER COMPOSITES
(2022)
Article
Materials Science, Ceramics
Cristina Pascual-Gonzalez, Carolina Elicker, Mario L. Moreira, Sergio Cava, Iasmi Sterianou, Dawei Wang, Antonio Feteira
Summary: (1 - x)KNbO3-xBiMnO(3) (0 <= x <= 0.25) ceramics were prepared using the solid-state reaction method. Bi and Mn were found to have low co-solubility in the orthorhombic structure. Both orthorhombic and pseudocubic crystal structures coexist within a certain range, and the grain size distribution shows bimodal behavior. Several anomalies in the dielectric behavior and phase transitions confirm the coexistence of crystal symmetries. Furthermore, it was discovered that the bandgap of KNbO3 can be tailored by co-doping Bi and Mn, resulting in a narrowing bandgap with increasing x.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Daiane Fernandes, Mateus M. Ferrer, Cristiane W. Raubach, Mario L. Moreira, Pedro L. G. Jardim, Eduardo Ceretta Moreira, Carlos F. O. Graeff, Sergio S. Cava
Summary: NaNbO3 nanoparticles were synthesized using microwave-assisted hydrothermal method and heat treatment. The crystallinity and particle shape of the nanoparticles were modulated by heat treatment. The obtained nanoparticles showed excellent photocatalytic activity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Catia Liane Ucker, Suelen R. Almeida, Marcelo L. Vitale, Fabio C. Riemke, Mateus M. Ferrer, Eduardo C. Moreira, Cristiane W. Raubach, Sergio Cava
Summary: Microwave-assisted hydrothermal synthesis was used to prepare aluminum (Al)-doped TiO2 (ALT) and niobium (Nb)-doped TiO2 (NBT) nanoparticles. The crystallinity, vibrational modes, surface morphology, and composition of the nanoparticles were investigated using X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS). The ALT particles showed higher crystallinity than the Al and Nb-doped TiO2 (ALNBT) particles, and all samples exhibited the anatase phase. Both ALT and NBT nanoparticles had spherical morphology according to SEM analysis. The Al-doped sample showed significant photocatalysis performance, achieving complete decolorization of rhodamine B in 75 minutes.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
C. P. Fernandez Perdomo, M. Mazzeto, R. H. G. A. Kiminami
Summary: This study investigates the effect of different precursors on the crystallization process and characteristics of ceramic powders synthesized by wet routes. The results show that using BaCO3 and Co(CH3COO)(2) precursors allows for simultaneous crystallization of two phases, while using nitrate precursors leads to the formation of core-shell heterostructures. Additionally, the One Pot-MPC method enables the efficient and rapid synthesis of a lead-free 0.5BZT/0.5FCO biphasic nanoparticulate system with ferrimagnetic behavior.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Management
Adriano Lima da Silva, Juliana Kelly Dionizio, Herbet Bezerra Sales, Stephanye Nunes Macario, Gabriel Goncalves de Andrade, Ana Cristina Figueiredo de Melo Costa
Summary: The objective of this work was to review the recent literature on the use of MoO3 and Ni-Zn ferrites as catalysts for biodiesel production, with a focus on whether there are studies reporting the use of MoO3 catalysts supported on Ni ferrite -Zn for biodiesel catalysis. The literature review was conducted using the Start software and indexed platforms such as ScienceDirect, Web of Science, and Scopus. The findings of this study demonstrate the widespread and established use of ceramic compounds of MoO3 and Ni-Zn ferrites as catalysts in biodiesel production reactions. However, there is a scientific gap in the research on heterogeneous catalysts, particularly the use of magnetic catalysts (MoO3/Ni-Zn ferrite) for biofuel production.
REVISTA DE GESTAO E SECRETARIADO-GESEC
(2023)
Article
Dentistry, Oral Surgery & Medicine
Fabiano Paiva Vieira, Alcides Gonini Junior, Evandro Piva, Hellen de Lacerda Oliveira, Wellington Luiz de Oliveira Da Rosa, Adriana Fernandes Da Silva, Rafael Pino Vitti, Cesar Henrique Zanchi, Sergio da Silva Cava
Summary: This study evaluated the physicochemical and biological properties of experimental resin-based calcium aluminate and calcium titanate materials for vital pulp therapy. The results showed that the dual-cured calcium aluminate material calcined at 800 degrees Celsius had similar properties to traditional materials in terms of its physicochemical and biological performance.
BRAZILIAN ORAL RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Veronica C. S. Diniz, Antonio Carlos C. Migliano, Ruth H. G. A. Kiminami, Philippe E. de Medeiros, Renalle C. A. de M. Nascimento, Daniela de L. A. C. S. Andrade, Ana C. F. M. Costa
Summary: This paper investigates the application of Mn1-xZnxFe2O4 nanoferrite particles as fillers in a silicone polymer matrix to create a composite material for absorbing electromagnetic radiation. The composite material's properties were characterized using various techniques and its electromagnetic properties were analyzed using network and impedance analyzers. The results show that the composite material with higher concentrations of Znx has lower dispersion, attributed to the size of the zinc particles. The composite material shows potential for practical application in the 1-10 GHz frequency bands, with reflectivity values of -24 dB in the 6 GHz frequency range.
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
(2022)
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)