Article
Materials Science, Multidisciplinary
Hongya Yu, Jiaming Li, Jingzhou Li, Xi Chen, Guangze Han, Jianmin Yang, Rongyin Chen
Summary: The high-frequency magnetic properties of FeSiBCr amorphous powder cores were studied, and it was found that annealing at low temperatures can improve the effective permeability and reduce core loss. The sample annealed at 480 degrees C showed the best magnetic performance.
Article
Materials Science, Ceramics
Shouding Wu, Yaqiang Dong, Ronglin Zhao, Xubin Li, Hang Wu, Wei Gao, Aina He, Jiawei Li, Xincai Liu
Summary: In this study, FeSiBCCr@SiO2&ZrO2 amorphous magnetic powder cores with core-shell structure were successfully prepared using the sol-gel method. The growth mechanism and potential chemical reactions of the SiO2&ZrO2 mixed insulation layer were analyzed. The insulation layer content was found to significantly affect the soft magnetic properties of the cores, improving their resistivity, DC bias performance, and reducing core loss.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Jian Wang, Guanbiao Li, Yihai He, Jia Xu, Zhaoguo Qiu, Zhigang Zheng, Ming Xie, Yuyu Li, Yunan Tian, Xin Liu, Dechang Zeng
Summary: Low-loss FeSiAl soft magnetic composites (SMCs) were prepared through atomic layer deposition coating and high temperature annealing. The microstructural analysis showed that the Al2O3 coatings on the FeSiAl surfaces could withstand high temperature annealing and improve the magnetic properties of the SMCs. The hysteresis loss was significantly reduced, permeability was improved, and eddy current losses were decreased.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Jiaqi Liu, Yannan Dong, Pu Wang, Zhengqu Zhu, Jing Pang, Xiaoyu Li, Jiaquan Zhang
Summary: By investigating the effects of EP and CIP content on the soft magnetic properties of SMCs, it was found that increasing EP content from 1 to 3wt% improved the insulated coating effect and density of SMCs, resulting in decreased core losses and increased permeability. When CIP content was 0-20wt%, core losses decreased due to decreased average particle size, while in 20-70wt% CIP content range, core losses rapidly increased due to continuous decrease of resistance and increase of coercivity. FeSiBCCr/CIP SMCs with 20wt% CIP and 3wt% EP exhibited high permeability, high DC bias%, and low core losses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Wei Zheng, Guangqiang Zhang, Qian Zhang, Haichen Yu, Zongzhen Li, Mingyu Gu, Su Song, Shaoxiong Zhou, Xuanhui Qu
Summary: This research studied the effects of normal annealing (NA) and magnetic field annealing (FA) on the soft magnetic properties and microstructure of Fe82Si2B13P1C3 amorphous alloy iron cores. Different methods of magnetic field application were used during the annealing process. The results showed that Fe82Si2B13P1C3 had lower loss and higher coercivity than commercially produced Fe80Si9B11. The annealing process also led to the formation of wide strip domains with low resistance and easy magnetization in the Fe82Si2B13P1C3 iron cores.
Article
Chemistry, Physical
Jiasong Chang, Tongkang Zhan, Xiaoling Peng, Jing Li, Yanting Yang, Jingcai Xu, Bo Hong, Dingfeng Jin, Hongxiao Jin, Xinqing Wang, Hongliang Ge
Summary: Soft magnetic composites of amorphous FeSiB/Ni-Zn ferrite were fabricated with significantly improved permeability and core loss by applying an external magnetic field during compression molding. The parallel orientation of the magnetic field during preparation process optimized the microstructure and magnetic circuit, leading to enhanced permeability, core loss, and DC-bias performance compared to perpendicular orientation and samples without magnetic field treatment. Utilizing a magnetic field during preparation process can further improve the soft magnetic performances of SMCs.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Qiang Luo, Donghui Li, Mingjuan Cai, Siyi Di, Zhengguo Zhang, Qiaoshi Zeng, Qianqian Wang, Baolong Shen
Summary: This study explores the soft magnetic properties, magnetic and atomic structures, and defect activation during creep deformation of Fe-based amorphous alloys. Field annealing was used to improve the magnetic softness-magnetization synergy in these alloys. Particularly, the Fe 66.65 Co 16 Si 2 B 14 Cu 1.35 alloy exhibits superb soft magnetic properties with high saturation magnetic flux density, low coercivity, and high effective permeability.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Pu Wang, Zhengqu Zhu, Jiaqi Liu, Huan Zhao, Jing Pang, Jiaquan Zhang
Summary: In this study, three kinds of composite powders were synthesized and prepared into corresponding SMPCs, which showed excellent soft magnetic performance. The addition of carbonyl iron powder to FeSiBC amorphous powders significantly increased the saturation magnetization, making it an ideal raw material for SMPCs. The SMPCs with a double-layer organic core-shell structure exhibited lower core loss and higher permeability compared to those with a single-layer structure.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mingjuan Cai, Jingjing Wang, Qianqian Wang, Zhijun Guo, Qiang Luo, Jing Zhou, Tao Liang, Xuesong Li, Qiaoshi Zeng, Baolong Shen
Summary: Stress annealing is used to enhance the magnetic softness of Fe83-xCoxB10Si3C3P1 (x = 0-16) amorphous alloys with a saturation polarization of up to 1.75 T. The stress-annealed alloys exhibit improved soft-magnetic properties, including low coercivity (1.8-2.2 A/m), low core loss (0.09-0.11 W/kg at 1.0 T and 50 Hz), and high permeability (27,000-33,200 at 5 A/m and 1 kHz). The enhanced magnetic softness is attributed to the induced longitudinal magnetic anisotropy and the annihilation of free volume caused by stress annealing.
MATERIALS RESEARCH LETTERS
(2023)
Article
Engineering, Chemical
Qiang Chi, Liang Chang, Yaqiang Dong, Yiqun Zhang, Bang Zhou, Chengzhong Zhang, Yan Pan, Qiang Li, Jiawei Li, Aina He, Xinmin Wang
Summary: Fe-based amorphous magnetic powder cores with excellent properties were successfully fabricated using a uniform double insulating layer core-shell structure. The hydrothermal oxidation process can control the thickness of the Fe3O4 insulating layer to effectively suppress eddy current loss. FeSiBPC AMPCs exhibit stable magnetic properties and low core loss, making them promising for high-frequency electromagnetic systems.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Chao Xia, Yuandong Peng, Xuwu Yi, Zhixin Yao, Yuanyuan Zhu, Geng Hu
Summary: Through investigating the effect of carbonyl iron powder (CIP) content on FeSiCr amorphous SMCs, it was found that with the increase of CIP content, the relative density and magnetic permeability were significantly improved, but the growth rate of density gradually decreased and could be divided into three grades. At 30 wt.% CIP content, the magnetic loss of FeSiCr SMC treated at 500 degrees Celsius was the smallest.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Engineering, Chemical
Xubin Li, Yaqiang Dong, Shouding Wu, Ronglin Zhao, Qian Ding, Xingjie Jia, Aina He, Jiawei Li, Xincai Liu
Summary: In this study, transverse magnetic field annealing was performed on FeSiBNbCu nanocrystalline powder cores to investigate the effect on magnetic properties, microstructure, and magnetic domain structure. The results showed that transverse magnetic field annealing improved the soft magnetic properties by optimizing the domain structure and reducing the formation of micro-vortex dots.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jiaqi Liu, Yannan Dong, Zhengqu Zhu, Huan Zhao, Jing Pang, Pu Wang, Jiaquan Zhang
Summary: FeSiBCCr amorphous powders were produced by a novel gas-water combined atomization process, and the magnetic powder cores (MPCs) fabricated from these powders exhibited high circularity, excellent thermal stability, and high saturation magnetization. The study explored the effects of phosphating treatment, cold pressing, and annealing on the properties of the MPCs, and determined the optimal conditions for achieving high permeability, low core loss, and high DC-bias% values.
Article
Materials Science, Ceramics
XinRu Wu, BenZhen Tang, Qiang Wang, Yong Wu, DongMei Li, Ding Ding, XiaoLong Guo, Lei Xia, Peng Yu
Summary: In this study, Fe83-xB10P4C2Cu1Vx (x = 0, 0.5, 1, 2) amorphous alloys were designed and prepared to enhance the soft magnetic properties. The effects of V addition on thermal stability, soft magnetic properties, and microstructure after annealing were investigated. The results showed that V effectively improved the thermal stability and the annealing process resulted in a composite structure that further enhanced the saturation magnetization and reduced the coercivity.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Zai-Dao Li, Wei-Wei Zhang, Ge-Tian Li, Song-Song Li, Hong-Sheng Ding, Tao Zhang, Yu-Jun Song
Summary: The effect of different annealing temperatures on the crystallization condition, magnetic properties, and thermal stability of the amorphous magnetic alloy Co(36)Fe(36)Si(4.8)B1(9.2)Nb(4) (at%) was investigated in this study. Results showed that the annealing temperature can significantly influence the size and content of precipitated nanocrystals in the amorphous alloy, leading to changes in magnetic properties and Curie temperature. Under an applied transverse external magnetic field of 9550.0 A·m(-1), annealing at 595 degrees C for 30 min resulted in the amorphous alloy exhibiting excellent soft magnetic properties, with a saturation magnetization of 110.00 mA·m(2)·g(-1), residual magnetic induction intensity of 4 x 10(-6) T, and coercivity as low as 57.3 A·m(-1). Furthermore, the Curie temperature of the field-annealed samples reached up to 440 degrees C, approximately 58 degrees C higher than that of the as-quenched species.
Article
Materials Science, Multidisciplinary
Xingjie Jia, Wei Zhang, Yaqiang Dong, Aina He, Jiawei Li, Run-Wei Li
Summary: This study investigated the structure and properties of Fe-Si-B-Cu alloys, finding that the alloy with 4at% Si content exhibited the best soft magnetic properties, with high-quality nanocrystalline structure and good magnetic characteristics after annealing. The coercivity of the alloys was almost proportional to the cube of the average grain size, due to the high ratio of uniaxial anisotropy to average random anisotropy.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Bojun Zhang, Fuyao Yang, Aina He, Huiyun Xiao, Yaqiang Dong, Jiawei Li, Yu Han
Summary: This study found that Mn-doping and rapid annealing in Fe-based nanocrystalline alloys can lead to superior magnetic softness, high-saturation magnetic induction, and large permeability. This is attributed to the superb nano-structural stability and the formation of regular magnetic domains.
Article
Chemistry, Multidisciplinary
Zichao Li, Yufang Xie, Ye Yuan, Yanda Ji, Viktor Begeza, Lei Cao, Rene Hubner, Lars Rebohle, Manfred Helm, Kornelius Nielsch, Slawomir Prucnal, Shengqiang Zhou
Summary: The study presents a simple and efficient method to prepare single-phase MnSi films on Si substrates by utilizing flash-lamp annealing. By controlling the energy density of the annealing process, the growth of single-phase MnSi, MnSi1.7, or their mixture can be achieved. The prepared MnSi films exhibit an increased Curie temperature and stable magnetic skyrmions over a wider temperature and magnetic-field range compared to bulk MnSi, showing promise for enhancing specific functional properties such as skyrmion stability.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Fushan Bai, Yaqiang Dong, Lei Xie, Qiang Li, Aina He, Xingjie Jia, Jiawei Li, Xinmin Wang
Summary: The study found that a large number of pre-existing crystal nuclei in the alloy can produce tiny nanocrystals, resulting in improved soft magnetic properties. By controlling the average nanocrystal size, the best magnetic performance can be achieved.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Xuhang Zhang, Yaqiang Dong, Changjiu Wang, Aina He, Jiawei Li, Fushan Li, Liang Chang, Qiang Chi, Xiaoxue Shui
Summary: The influence of phosphorus content on Fe81.5Si3B10+xP3.5-xC0.2Cu0.8Nb1 alloys has been studied, showing improvements in Curie temperature and saturation magnetic flux density with decreased P content. Optimal magnetic field annealing technique results in amorphous alloys with good soft magnetic properties, indicating the importance of phosphorus content and annealing conditions in enhancing magnetic performance.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Mengji Gong, Yaqiang Dong, Jianjun Huang, Liang Chang, Yan Pan, Falong Wang, Aina He, Jiawei Li, Xincai Liu, Xinmin Wang
Summary: Toroid-shaped Fe-based soft magnetic powder cores were prepared by combining commercial FeSiCr and carbonyl iron powder insulated with epoxy resin. The research focused on the impact of CIP mass ratio on magnetic properties, optimizing CIP content to achieve higher effective permeability, stable permeability in a wide frequency range, improved DC bias characteristic, and reduced core loss.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Polymer Science
Hao Lu, Yaqiang Dong, Xincai Liu, Zhonghao Liu, Yue Wu, Haijie Zhang, Aina He, Jiawei Li, Xinmin Wang
Summary: Thermosetting organic resins are commonly used as insulating coatings for soft magnetic powder cores due to their high electrical resistivity. This study found that using poly-silicon-containing arylacetylene resin as an insulating layer in SMPCs can lead to the best magnetic properties, such as the lowest core loss and highest permeability, when annealed at 700 degrees Celsius for 1 hour.
Article
Materials Science, Multidisciplinary
Z. Li, Y. Xie, Y. Yuan, M. Wang, C. Xu, R. Huebner, S. Prucnal, S. Zhou
Summary: In this study, B20-type FeGe films were successfully prepared by pulsed laser melting, with X-ray diffraction confirming the formation of the B20 phase. The blocking temperatures of FeGe samples increase with increasing pulsed laser energy density, attributed to the increased grain size of B20-type FeGe. This method can be used to obtain various B20-type transition metal germanides and silicides as potential magnetic skyrmion-hosting materials for spintronics.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zichao Li, Ye Yuan, Rene Hubner, Viktor Begeza, Thomas Naumann, Lars Rebohle, Olav Hellwig, Manfred Helm, Kornelius Nielsch, Slawomir Prucnal, Shengqiang Zhou
Summary: Researchers successfully prepared B20-MnSi films on Si(100) substrates, offering better conditions for practical applications. The regrown layer exhibits a higher Curie temperature compared to bulk material, and the magnetic skyrmion signature was confirmed through magnetic and transport measurements. Flash-lamp annealing in the millisecond range shows promise for fabricating Si-based skyrmionic devices.
MATERIALS TODAY PHYSICS
(2021)
Article
Geochemistry & Geophysics
Peter Boelens, Zhe Lei, Bjoern Drobot, Martin Rudolph, Zichao Li, Matthias Franzreb, Kerstin Eckert, Franziska Lederer
Summary: This study investigates the separation of phosphors from end-of-life compact fluorescent lamps using high-gradient magnetic separation, presenting a fast and reliable quantification method. It also demonstrates the efficient removal and recovery of phosphors through the high-gradient magnetic separator process.
Article
Chemistry, Multidisciplinary
Ahmad Echresh, Himani Arora, Florian Fuchs, Zichao Li, Rene Huebner, Slawomir Prucnal, Joerg Schuster, Peter Zahn, Manfred Helm, Shengqiang Zhou, Artur Erbe, Lars Rebohle, Yordan M. Georgiev
Summary: A symmetric Hall bar configuration was used to fabricate highly p-type germanium nanowires and check their homogeneity in terms of resistivity and Hall coefficient. It was found that with decreasing nanowire width, resistivity increases and carrier concentration decreases.
Article
Engineering, Electrical & Electronic
Hao Lu, Yaqiang Dong, Xincai Liu, Zhonghao Liu, Yan Ma, Yue Wu, Aina He, Jiawei Li, Xinmin Wang
Summary: In this study, soft magnetic powder cores with a nanoporous-structured phosphate coating were fabricated, which showed a beneficial adsorption effect on the outer resin and enhanced the bonding force between the organic/inorganic coating. Optimized soft magnetic properties were obtained, making it suitable for manufacturing micro-magnetic components.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Haijie Zhang, Fushan Bai, Yaqiang Dong, Lei Xie, Qiang Li, Aina He, Jiawei Li
Summary: In this study, new Ge-containing Fe-based nanocrystalline alloys were developed, and the effects of Ge content on the magnetic and crystallization processes were investigated. The addition of Ge extended the annealing window and produced nanocrystalline alloys with excellent magnetic properties. Non-isothermal crystallization kinetics studies also revealed a decrease in nucleation activation energy with increasing Ge content.
Article
Materials Science, Multidisciplinary
Yue Wu, Yaqiang Dong, Munan Yang, Xingjie Jia, Zhonghao Liu, Hao Lu, Haijie Zhang, Aina He, Jiawei Li
Summary: This work systematically studied the effect of the annealing process on microstructure and magnetic properties of nanocrystalline soft magnetic powder cores. The optimized microstructure led to outstanding soft magnetic properties.
Article
Materials Science, Ceramics
Shouding Wu, Yaqiang Dong, Ronglin Zhao, Xubin Li, Hang Wu, Wei Gao, Aina He, Jiawei Li, Xincai Liu
Summary: In this study, FeSiBCCr@SiO2&ZrO2 amorphous magnetic powder cores with core-shell structure were successfully prepared using the sol-gel method. The growth mechanism and potential chemical reactions of the SiO2&ZrO2 mixed insulation layer were analyzed. The insulation layer content was found to significantly affect the soft magnetic properties of the cores, improving their resistivity, DC bias performance, and reducing core loss.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
