Article
Materials Science, Multidisciplinary
N. Siragi, M. El Hadri, H. Ahamdane, M. A. El Idrissi Raghni
Summary: Cu-doped and Mn-doped forsterite powders prepared by sol-gel method exhibit high purity, with the color of the pigments mainly influenced by the chromophore's valence state and concentration. Pigments with low doping levels show attractive blue and purple colors.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Ceramics
Yang Lou, Yang Chen, Zhimu Gu, Qiang Qiu, Chanjuan Shi, Le He, Yingbin Xing, Jinggang Peng, Haiqing Li, Yingbo Chu, Jinyan Li, Nengli Dai
Summary: This study demonstrates the highly efficient and stable photoluminescence properties of Er3+/Yb3+/Zr4+ co-doped BaTiO3 ceramic. The emission intensity of Er3+ in the green region was significantly increased under the optimized Zr4+ concentration, and thermal enhancement of emission at different wavebands was achieved with different Zr4+ concentrations. Additionally, thermal quenching behavior was suppressed by energy transfer and ligand distortion induced by Zr4+.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Thomas Dippong, Erika Andrea Levei, Firuta Goga, Oana Cadar
Summary: The paper investigates the structural, morphological, and color properties of Co2+-substituted Mn ferrite embedded in an SiO2 matrix and their potential application as pigments in the ceramic industry. It was found that the nanocomposites are stable after 400 degrees Celsius, with color loss decreasing and particle size and porosity decreasing as the Mn2+ substitution by Co2+ increases. Single crystalline phase was only observed in the sample with the highest Mn2+ substitution by Co2+, and the synthesized nanoparticles exhibit a dark blue color that varies in shades based on the Mn2+ substitution by Co2+.
MATERIALS CHARACTERIZATION
(2021)
Article
Materials Science, Ceramics
Alexander Gordeev, Svetlana Kuznetsova, Ekaterina Lyutova, Olga Khalipova, Dmitriy Fedorishin, Lilia Selyunina, Alexandra Malchik
Summary: Cerium dioxide sols, widely used in various fields, can be prepared without separating the oxide from the solution. The stabilizer, PVA, plays a key role in forming weakly aggregated CeO2 nanoparticles. The prepared sol exhibits antioxidant properties and can form a calcium-phosphate layer.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Huadong Fu, Yan Qin, Zhenyue Zou, Jiamin Fan, Jipeng Dou, Kai Chang, Zhixiong Huang
Summary: Lightweight ablative materials are considered as the most promising candidate materials in the field of aerospace ablative thermal protection due to their low density, high efficiency heat insulation, and excellent designability. In this study, a polycarbosilane in-situ reinforced carbon felt/phenolic aerogel composite is reported, which exhibits low density, hydrophobicity, low thermal conductivity, and high compressive strength. The composite material shows high efficiency in heat protection and insulation with a low linear ablation rate. It has competitive and broad application prospects in the field of ablation heat protection.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Sherlin Joseph, Senthil Kumar Venkatraman, Naveensubramaniam Vijayakumar, M. Samuel Collin, Sasikumar Swamiappan
Summary: Nanocrystalline forsterite was synthesized using the sol-gel aided combustion method with citric acid as a fuel. Characterization through methods like XRD and SEM/EDAX showed the formation of single phasic forsterite material at 900 degrees C, with slow biomineralisation ability in physiological conditions.
Article
Materials Science, Multidisciplinary
Bin Wu, Hongwei Wu, Yifan Gong, Anze Li, Xiaoyong Jia, Liangliang Zhu
Summary: An enantiomeric pair of luminescent gelators designed with hexathiobenzene and glutamic acid derivatives exhibit aggregation-induced emission (AIE), room-temperature phosphorescence (RTP), and circularly polarized luminescence (CPL). These optical properties can be switched on and off by thermal stimuli.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Materials Science, Ceramics
G. Monros, M. Llusar, J. Badenes, R. Galindo
Summary: A frit is a glassy ceramic composition that is made by fusion, quenching, and granulating. It can be used for the preparation of ceramic glazes for waterproofing and aesthetic purposes.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
N. V. Besprozvannykh, D. S. Ershov, O. Yu. Sinel'shchikova, V. L. Ugolkov
Summary: For the first time, combustion synthesis with mannitol was used to obtain bis-muth chromates based on the ternary systems MeO-Cr2O3-Bi2O3 (Me = Sr, Ca). This synthesis method is considered a special case of the sol-gel process, which offers advantages such as reduced energy consumption and high product purity. The article presents the results of photocatalytic and electrophysical studies on the obtained powders and ceramics. Although the synthesized powders showed slight photocatalytic activity in the methylene blue decomposition reaction, the ceramic samples exhibited conductivity ranging from 9.55 x 10-4 to 1.0 x 10-2 S/cm at 600 degrees C. Doping the compound Bi14CrO24 (beta 1-phase) with 10 mol.% CaO proved most effective in improving the electrical conductivity.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
N. H. Alonizan
Summary: Pure and Al-doped ZnO nanoparticles were synthesized using hydrothermal technique. The structural and phase analysis showed that Al doping increased the crystallite size and caused compressive stress formation in the material network. Other studies investigated the impact of different Al doping ratios on powder morphology, optical bandgap, and electronic defects localized in the material band-gap.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Electrochemistry
Y. Al-Douri, A. F. Abd El-Rehim
Summary: The VO2 thin film was deposited on a glass substrate using the spin-coating technique, with tungsten doped as an acidic solution to the vanadium precursor. The study investigated the energy gap and optical properties of the film with and without tungsten doping, showing significant differences in optical transmissions with tungsten doping. Empirical models of refractive index and optical dielectric constant were also explored in the research.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Ahmed Ali, Mansour M. Hassan, G. Goda Mohammed, Hossam Youssef Abdel El-Hamid, Hilmy Awad
Summary: Nano-composites ceramic of (Al2O3/BaTiO3) were successfully fabricated by Sol. Gel. technique. The addition of Al2O3 changed the structure and particle size of BaTiO3, resulting in uniform distribution of nano-sized particles. The infrared, Raman, and UV/Vis spectroscopy revealed distinct peaks and splits for Al2O3/BaTiO3. Moreover, Al2O3 exhibited a significant effect on the dielectric properties of the composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Multidisciplinary
Mehjabeen Khan, Jyoti Shukla, Pallavi Saxena, Ashutosh Mishra, Pradeep Sharma
Summary: In this study, multi-phase ceramic composites consisting of barium titanate and rare-earth-doped magnetic spinel ferrite were synthesized and their structure, magnetic properties, and dielectric properties were investigated. The results showed that the rare-earth-doped magnetic spinel ferrite affected the magnetic and dielectric response of barium titanate.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
Habib Chenaina, Charfeddine Messaadi, Jalila Jalali, Hatem Ezzaouia
Summary: This study focuses on sol-gel derived SnO2-TiO2 thin films deposited on silicon wafer type Si (100) substrate using spin coating technique, followed by heat treatments at four different temperatures. XRD characterization reveals the formation of nano-crystalline phase at 400 degrees C and further crystallization with increasing annealing temperature. Optical and dielectric properties analysis demonstrates universal many body response over a broad frequency range, presenting variations in structure and performance of the films.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Efrat Shukrun Farrell, Nir Ganonyan, Ido Cooperstein, May Yam Moshkovitz, Yaron Amouyal, David Avnir, Shlomo Magdassi
Summary: Aerogels, the lightest solid material known, are nanoporous solids with low density, widely used in various applications. This study introduces a new comprehensive solution for preparing aerogels photochemically and fabricating them in complex shapes at different scales.
APPLIED MATERIALS TODAY
(2021)
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)