Article
Materials Science, Multidisciplinary
Giora Kimmel, Alla Sahartov, Yatir Sadia, Ze'ev Porat, Jacob Zabicky, Efraim Dvir
Summary: The present study reports on the consistent non-monotonic lattice variation in nanocrystalline CeO2. Analysis of more than 30 powder samples revealed that unit cell parameters change smoothly with decreasing grain size, showing moderate contraction between 100 to 30 nm and severe expansion below 20 nm. The change in lattice parameter is modeled as a combination of surface tension-induced contraction and ionic bonds weakening-induced lattice expansion, applicable to most ionic nanocrystalline materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Ceramics
Nan Li, Nuoting Yu, Zhongzhou Yi, Di An, Zhipeng Xie
Summary: In this study, stable 12Ce-ZrO2 nanoparticles were successfully prepared using a novel sol-gel-flux method, and were compared with the product synthesized using the traditional sol-gel method. The results showed that the sol-gel-flux method exhibited better sintering ability and more homogeneous microstructure.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Amun Amri, Yola Bertilsya Hendri, Edy Saputra, Desi Heltina, Chun-Yang Yin, M. Mahbubur Rahman, Manickam Minakshi, Nicholas Mondinos, Zhong-Tao Jiang
Summary: The formation kinetics of LiFePO4 Olivine synthesized through sol-gel route was studied using a non-isothermal approach. The results showed that temperature played a crucial role in the synthesis of LiFePO4, with an optimal calcination temperature of 700°C yielding LiFePO4 Olivine with high crystallinity, better lattice parameters, and phase purity.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Jihene Arfaoui, Abdelhamid Ghorbel, Carolina Petitto, Gerard Delahay
Summary: Higher NO-SCR performances can be obtained between 200 and 500 degrees C over the new ternary MoO3-CeO2-ZrO2 and WO3-CeO2-ZrO2 catalysts. Above 90 % NO conversions into essentially N-2 (>= 97 %) are achieved between 350 and 500 degrees C over the most efficient MoO3-CeO2-ZrO2 ternary catalyst.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Materials Science, Ceramics
Saruchi Rani, Surbhi Verma, Bharti Sharma, Sushil Kumar
Summary: This communication presents the synthesis and characterization of Sn1-xCexO2 (0 <= x <= 1) nanocomposites using a cost effective sol-gel route and spin coating technique. The annealed samples were analyzed using various characterization tools to determine their structural, optical, and thermal properties. The results show the presence of tetragonal SnO2 and cubic CeO2 phases in the annealed samples. The study also investigated the variations in crystallite size, lattice constants, and other parameters with composition. The optical properties, such as complex dielectric constant, extinction coefficient, and refractive index, were studied using optical absorption spectroscopy. Thermal analysis provided insights into thermodynamic parameters such as enthalpy, activation energy, entropy, and Gibbs free energy.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Xinghua Su, Mengying Fu, Gai An, Zhihua Jiao, Qiang Tian, Jumeng Wei
Summary: ZrO2/rGO nanocomposites were successfully fabricated using flash sintering, with in situ thermal reduction of graphene oxide during the process. This green and simple approach allows for the production of dense ceramic matrix nanocomposites reinforced with graphene at low temperatures in a short period of time, resulting in excellent mechanical properties.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
V Poojitha, S. Mahalakshmi, K. Santhi, S. Nithyanatham
Summary: In this study, multiferroic bismuth ferrite was prepared using the sol-gel method and its structural and optical characteristics were examined. X-ray diffraction and Fourier transform infrared analysis were used to study the structure, while field emission scanning electron microscopy was used to observe the morphology. The research found that bismuth ferrite has potential importance in applications such as high dielectric constant capacitors and hard disc components.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Ceramics
Nan Li, Di An, Zhongzhou Yi, Nuoting Yu, Zhipeng Xie
Summary: A novel sol-gel-flux method was used to synthesise 1Y6Ce-ZrO2 nanoparticles, with the NaCl + KCl system showing lower preparation temperature and improved dispersion and sintering performance compared to the NaCl system.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Muchen Wu, Chong Ouyang, Ziran Ye, Shunbo Li, Zhanglian Hong, Mingjia Zhi
Summary: Composite aerogels with metallic Ag and semiconductor CeO2 phases were prepared and studied for photocatalytic CO2 reduction. The addition of Ag greatly improved the activity and selectivity of the composite aerogels, attributed to the surface plasmon resonance effect brought by Ag.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Ceramics
Matin Shirzad Choubari, Jamal Mazloom, Farhad Esmaeili Ghodsi
Summary: In this study, a CeO2-ZnO nanocomposite was synthesized using a green method and compared with a citrate sol-gel derived nanocomposite. The CZO-g exhibited better crystallinity and higher specific capacitance, indicating its potential as a high-performance supercapacitor material.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Nayeem Ahmad Pandit, Tokeer Ahmad
Summary: CeO2 and ZrO2 nanospheres were prepared by hydrothermal synthesis and ZrO2-CeO2 nanocomposite heterostructures with different weight percent ratios were obtained through mechanical means. The as-synthesized metal oxides and nanocomposites were characterized using various techniques, revealing the smaller band gaps and enhanced surface areas of ZrO2-CeO2 composites compared to pure CeO2. A 7.5% ZrO2-decorated CeO2 nanocomposite showed remarkable enhancement in gas sensing performance. The improved properties were attributed to the decrease in band gap, increased surface area, the presence of oxygen vacancies on ZrO2 surface, and the formation of ZrO2-CeO2 heterojunctions.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Nuray Yerli Soylu, Anil Soylu, Dilara Nur Dikmetas, Funda Karbancioglu-Guler, Sadriye Kucukbayrak, Melek Erol Taygun
Summary: TiO2-based ceramic nanofiber membranes were synthesized by combining sol-gel and electrospinning processes. The thermal treatment at different temperatures had a significant effect on the properties of the membranes. The nanofiber membranes calcined at 650 and 750 degrees C showed high photocatalytic and antibacterial activities, making them a promising candidate for wastewater treatment.
Article
Polymer Science
Anna Adamczyk
Summary: Materials of the ZrO2-SiO2 system were synthesized using the sol-gel method, and the effect of different ZrO2 precursors and annealing temperatures on the structure of the samples was analyzed using various characterization techniques.
Article
Spectroscopy
Xiangchuan Wu, Jinhui Wei, Chengyuan Wu, Guangping Lv, Lina Wu
Summary: In this study, ZrO2/CeO2/PAA nanocomposites with phosphatase-like activity were synthesized, enhancing the activity of CeO2 nanorods by adding ZrO2. Coating the nanocomposites with PAA improved dispersion, stability, and robustness. The nanocomposites showed excellent adaptability in a wide pH range and were used for the detection of methyl parathion.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Ceramics
Shadpour Mallakpour, Mina Naghdi
Summary: A bone scaffold was fabricated using a hybrid of TiO2@LDH to leverage the advantages of both nanostructures, with LDH providing a suitable bed for TiO2 nanoparticles and Alg embedding them for stability. The scaffold showed excellent biomineralization and antibacterial properties, making it a promising candidate for bone tissue engineering.
CERAMICS INTERNATIONAL
(2022)
Review
Chemistry, Multidisciplinary
Kirill V. Vokhmintcev, Pavel S. Samokhvalov, Igor Nabiev
Article
Optics
P. A. Linkov, K. V. Vokhmintcev, P. S. Samokhvalov, I. R. Nabiev
OPTICS AND SPECTROSCOPY
(2017)
Article
Materials Science, Ceramics
Elena A. Trusova, Kirill V. Vokhmintcev
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2014)
Article
Materials Science, Ceramics
Elena A. Trusova, Anastasia A. Khrushcheva, Kirill V. Vokhmintcev, Dmitry D. Titov
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2013)
Proceedings Paper
Physics, Multidisciplinary
Pavel Linkov, Kiri V. Vokhmintcev, Pavel S. Samokhvalov, Igor Nabiev
1ST INTERNATIONAL SYMPOSIUM PHYSICS, ENGINEERING AND TECHNOLOGIES FOR BIO-MEDICINE
(2017)
Proceedings Paper
Nanoscience & Nanotechnology
Kirill V. Vokhmintcev, Igor Nabiev, Pavel S. Samokhvalov
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)