Article
Materials Science, Multidisciplinary
Muhammad Nadeem, Hasan M. Khan, Saeed Ahmad Buzdar, Javed Ahmed, Mohammad A. Assiri, Mehrun Nisa
Summary: The structural, magnetic, and dielectric properties of Yb ions substituted Ca-hexaferrites synthesized using the citrate sol-gel method were studied. Yb substitution was found to have a significant impact on the magnetic and dielectric properties of the ferrites.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
V. Balasubramani, V. Mowlika, A. Sivakumar, Njod Al Sdran, F. Maiz, Mohd Shkir
Summary: Research on tuning the magnetic properties of divalent ferrite materials has its own significance due to their wide applications in modern electronic and magnetic devices. This study focuses on the sono-chemical synthesis and characterization of pure and Sn doped CoFe2O4 nanoparticles (NPs). The obtained results reveal a stable cubic crystallographic structure, stable hard ferromagnetic state, and higher coercivity in Sn doped CoFe2O4 NPs compared to pure CoFe2O4. These findings suggest the potential application of Sn doped CoFe2O4 NPs in magnetic data storage.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Asha D. Patil, Ram A. Pawar, Sunil M. Patange, Santosh S. Jadhav, Shyam K. Gore, Sagar E. Shirsath, Sher Singh Meena
Summary: TiO2-doped nanocrystalline Ni0.4Cu0.3Zn0.3Fe2O4 ferrites were synthesized using the sol-gel method, exhibiting cubic spinel structure and semiconducting properties with increasing TiO2 doping level. The addition of TiO2 led to a decrease in lattice parameter, band gap energy, and saturation magnetization of the ferrites, confirming the soft magnetic behavior at room temperature. The presence of a nonmagnetic TiO2 secondary phase was confirmed by Mossbauer study, contributing to the decrease in magnetic behavior of the doped ferrites.
Article
Materials Science, Multidisciplinary
Amin Abd El-Moneim, S. A. Mazen, N. I. Abu-Elsaad
Summary: The elastic properties of Li-Mn-Co, Li-Mn-Ni, and Li-Mn-Cu ferrite series were evaluated and predicted for the first time using different theoretical models. The approach by Abd El-Moneim and Alfifi successfully predicted changes in bulk modulus, while the theories by Makishima-Mackenzie and Rocherulle were useful for predicting experimental Poisson's ratio. Reasonable agreement between theoretical and experimental data was achieved for elastic moduli and micro-hardness using Makishima-Mackenzie's theory.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
N. D. Chaudhari, D. Y. Nadargi, S. M. Kabbur, R. C. Kambale, A. Das, S. S. Suryavanshi
Summary: This article reports the structural, morphological, and elastic properties of NiXZn1-XFe2O4 ferrimagnetic oxides prepared using oxalate chemistry. The results show that the lattice constant decreases and the elastic moduli remains constant with increasing Ni2+ content.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
A. M. Adam, A. Elshafaie, E. M. M. Ibrahim
Summary: Hexagonal Sr1_xDyxFe12O19 (x = 0.0-0.1) samples were prepared by high-energy ball milling technique, and the effect of Dy doping on their structural and magnetic properties was studied. XRD analysis confirmed the formation of single polycrystalline phase of SrFe12O19. Dy doping resulted in significant improvement in saturation magnetization (Ms) and intrinsic coercivity (Hc) at room temperature, and the samples exhibited high coercivity, making them potential candidates for high frequency applications.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Deepika Chahar, Preeti Thakur, An-Cheng Aidan Sun, Atul Thakur
Summary: Nickel-substituted cobalt-zinc ferrite nanoparticles were synthesized and their morphological, structural, electrical, magnetic, and dielectric properties were investigated. X-ray diffraction analysis showed the formation of single-phase cubic structure, with crystallite size varying between 36.79 and 40.57 nm. SEM micrographs revealed an average grain size of approximately 100 nm. The synthesized nanoferrite particles exhibited efficient dielectric properties at 1 MHz frequency.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Gadudhula Ganesh, Andem Sandeep, Gugulothu Chanti, Rapaka S. C. Bose, Maringanti Sravan Kumar, K. N. Prasanna Kumari, Thangalapally Shekharam, Y. Vasudeva Reddy, Jyotirmayee Satapathy, Dharavath Rajeshwari, Pavan Kumar Naini
Summary: Spinel ferrites with the compositional formula Ni0.8Zn0.2Fe2-xDyxO4 (x = 0, 0.004, 0.008, 0.012, 0.016) were prepared using the sol-gel method. The X-ray diffraction measurements confirmed the cubic spinel structure of the samples. Morphological analysis revealed spherical shaped particles. Thermogravimetric analysis showed the temperature changes and energy dispersive X-ray spectroscopy confirmed the elemental composition. Fourier-transform infrared spectroscopy revealed the various bonds present in the compounds. The UV-vis absorption spectrum indicated energy gap values, which decreased slightly with increased Dy concentration. Raman spectroscopy studied the crystal distortion and phases, and magnetic measurements observed the effect of Dy doping on magnetic properties.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Huanhuan Huang, Yaohui Zou, Weiping Zhou, Zhenzhi Cheng, Zhongkai Wu, Sen Liao, Guangsheng Luo
Summary: The effects of Lu3+ doping on Ni-Zn ferrites were investigated, showing changes in lattice parameters, crystallite size, and magnetization as the Lu3+ content increases. The synthesized ferrites exhibited normal dielectric behavior under alternating electric field and showed peak dielectric loss tangent at a certain frequency. The saturation magnetization of the samples first increased and then decreased with increasing Lu3+ concentration, reaching a peak value at x = 0.004.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Ala Manohar, Gutturu Rajasekhara Reddy, Mohammad Rafe Hatshan, J. Pundareekam Goud, Ki Hyeon Kim
Summary: Spinel ferrite composite materials with distinctive physiochemical properties have attracted significant interest in the scientific community, especially in the electrical field. The prepared nanocomposite, composed of various highly crystalline materials, was characterized using XRD, FE-SEM, TEM, XPS, and VSM techniques. The results revealed excellent capacity retention and specific capacity, indicating the potential of this nanocomposite as an electrode material for electrochemical energy storage applications.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Electrical & Electronic
M. S. Raja Seetharaman, P. Sivagurunathan
Summary: In this study, spinel ferrite nanoparticles with the chemical formula of MgxCo1 - xFe2O4 (x = 0.3, 0.5, 0.7) were successfully synthesized using the co-precipitation method. The structural, functional, morphological, and magnetic properties of the magnesium cobalt ferrite nanoparticles were discussed. The synthesized materials exhibited potential as high-density recording media applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
V. V. Awati, R. A. Pawar, S. M. Rathod, Santosh S. Jadhav, Mehboobali Pannipara, Abdullah G. Al-Sehemi
Summary: The nanocrystalline spinel ferrite Ni0.3Cu0.2Zn0.5Fe2O4 was prepared by sol-gel self-ignition route, with samples annealed at 400°C and 600°C. Characterization through X-ray diffraction, transmission electron microscopy, vibrating sample magnetometer, elastic and dielectric spectroscopy revealed an increase in crystal size, lattice constant, elastic moduli, Poisson's ratio, saturation magnetization, coercivity, and dielectric parameters with increasing annealing temperature.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
B. Jyothish, John Jacob
Summary: This study evaluated the physical properties and anticancer characteristics of ZnFe2O4 and AlxZn1-xFe2O4 nanoparticles. The results showed that with increasing annealing temperatures, the micro strain values of the nanoparticles decreased, as well as the band gap energy. In cell experiments, these nanoparticles exhibited anticancer activities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Saba Yousaf, Ishtiaq Ahmad, Mudassara Kanwal, Thamraa Alshahrani, Hala H. Alhashim, Nessrin A. Kattan, Hafiz Muhammad Tahir Farid, Ahmer Riaz, Taqi Mehran, A. Laref
Summary: Spinel ferrites with varying degrees of barium substitution were synthesized using sol-gel technique, leading to changes in lattice constant, density, resistivity, activation energy, magnetization, and coercivity. The addition of barium ions resulted in a decrease in temperature dependent resistivity, indicating semiconducting nature. High dc resistivity and low dielectric loss suggest these samples may be suitable for high-frequency devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Materials Science, Ceramics
Sachin Kumar Godara, Mandeep Singh, Varinder Kaur, S. B. Narang, Ashwani Kumar Sood
Summary: In this study, Ba1-xCaxFe12O19 samples were synthesized using sol-gel auto-combustion method, with the maximum calcium solubility observed at 1200 degrees C. The XRD data showed a decrease in lattice parameters and cell volume with increasing 'x', while FESEM images revealed an increase in particle size. Magnetic measurements indicated that the highest saturation magnetization was found in the x = 0.50 sample, with a decrease in coercivity as 'x' increased.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Kundan Jangam, Kundan Patil, Sagar Balgude, Sunil Patange, Paresh More
Summary: Cobalt-doped magnetically separable Zn1-xCoxFeMnO4 ferrite nanoparticles were synthesized using the auto-combustion process of sol-gel method. The introduction of cobalt led to changes in crystal structure and magnetic properties.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Physics, Applied
Sagar E. Shirsath, R. H. Kadam, K. M. Batoo, Danyang Wang, Sean Li
Summary: In this study, the magnetic properties of Sr0.8Ca0.2AlxCoxFe12-2xO19 hexagonal ferrites were improved through Co2+-Al3+ substitution. These ferrites show great potential as rare earth-free magnets with improved saturation magnetization, coercivity, and microwave absorption characteristics. This research highlights the possibility of using hexagonal ferrites as alternatives to rare earth-based permanent magnets.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Multidisciplinary Sciences
Yukiko Yasukawa, Kouhei Nozawa, Taneli Tiittanen, Maarit Karppinen, Johan Linden, Sagar E. Shirsath, Shin Yabukami
Summary: A high-quality magnetic Ni0.5Zn0.5Fe2O4 ferrite powder/polymer composite sheet was fabricated using common and environmentally friendly elements, and tested for dynamic permeability at frequencies up to 50 GHz. Two different methods were used for the high-frequency permeability measurements, both producing essentially equivalent results. The sample exhibited uniaxial-anisotropic behavior in the parallel direction of the sheet, showing potential as an anisotropic electromagnetic wave-interference material at GHz frequencies.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Ceramics
S. S. Choudhari, S. R. Wadgane, Bharatratna P. Gaikwad, S. S. Satpute, Khalid Mujasam Batoo, Omar M. Aldossary, Sagar E. Shirsath, R. H. Kadam
Summary: Materials with magneto-electric (ME) properties were prepared by combining piezoelectric-BTO and piezomagnetic-CCFO phases into three dimensional nano-particles. The research investigated the crystalline nature, magnetic properties, and dielectric properties of the materials, finding that the dielectric constant increased with the percentage of BTO and the sample with 60% CCFO and 40% BTO had the highest ME coefficient.
CERAMICS INTERNATIONAL
(2021)
Review
Chemistry, Multidisciplinary
Devendra S. Wagare, Sagar E. Shirsath, Mujahed Shaikh, Prashant Netankar
Summary: Solvents make up about 80% of the chemicals used in chemical synthesis, with many of them being flammable or toxic. Sustainable solvents can be easily recovered and reused, and can support catalysts effectively.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Electrical & Electronic
S. S. Choudhari, S. B. Shelke, Khalid Mujassam Batoo, Syed Farooq Adil, A. B. Kadam, Ahamad Imran, Muhammad Hadi, Emad H. Raslan, Sagar E. Shirsath, R. H. Kadam
Summary: In this study, MZFO-BTO composites were synthesized using sol-gel auto-ignition route and ceramic route, showing both piezomagnetic and piezoelectric phases. The average crystallite size increased with increasing BTO phase, and different strains were observed in MZFO and BTO phases. SEM images and EDX analysis confirmed the microstructure and composition of the composites. The improved magnetoelectric properties of the composite make it suitable for electronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Supriya R. Patade, Deepali D. Andhare, Mangesh V. Khedkar, Swapnil A. Jadhav, K. M. Jadhav
Summary: Monodispersed Mn0.5Zn0.5Fe2O4 nanoparticles were prepared using a chemical co-precipitation technique, with properties suitable for magnetic hyperthermia application. The nanoparticles exhibited superparamagnetic behavior at room temperature and showed high heating potential for hyperthermia therapy, with a specific absorption rate of 110.90 W/g.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Physics, Applied
G. B. Todkar, R. A. Kunale, R. N. Kamble, Khalid M. Batoo, M. F. Ijaz, A. Imran, M. Hadi, E. H. Raslan, Sagar E. Shirsath, R. H. Kadam
Summary: Ce-Dy ion-doped M-type barium hexaferrites exhibit good microwave absorption properties, with an improvement in crystallite size. The introduction of Ce-Dy ions enhances the coercivity of BaM hexaferrites.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Deepali D. Andhare, Supriya R. Patade, Swapnil A. Jadhav, Sandeep B. Somvanshi, K. M. Jadhav
Summary: The synthesis and properties of Zn2+-substituted cobalt ferrites were investigated, including changes in physical and chemical properties, structural features, and magnetic behavior. Analysis using various techniques revealed the impact of Zn2+ doping on the characteristics of the cobalt ferrite material.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Ravindra N. Kambale, Krishnakumar M. Sagar, Sunil M. Patange, Sagar E. Shirsath, K. G. Suresh, Vaishali A. Bambole
Summary: Nd3+-substituted Ni-Zn ferrite nanoparticles were synthesized using the sol-gel autocombustion technique, and a nanocomposite with polyaniline (PANI) was prepared through in situ polymerization. The microwave absorbing properties of both the ferrite nanoparticles and the ferrite/PANI nanocomposite were investigated, showing that the nanocomposite has excellent absorption properties for incident microwaves.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yassine Slimani, Munirah A. Almessiere, Sadik Guner, Bekir Aktas, Sagar E. Shirsath, Maxim Silibin, Alex Trukhanov, Abdulhadi Baykal
Summary: This study compared the structure, morphology, optical, and magnetic properties of Er3+ and Sm3+ codoped CoFe2O4 nanospinel ferrite synthesized via hydrothermal and sonochemical methods. The results showed that the distribution of cations and the variation in crystallite/particle sizes are key factors in controlling the intrinsic properties of the samples.
Expression of Concern
Engineering, Electrical & Electronic
Supriya R. Patade, Deepali D. Andhare, Mangesh V. Khedkar, Swapnil A. Jadhav, K. M. Jadhav
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Sagar E. Shirsath, M. Hussein N. Assadi, Ji Zhang, Nitish Kumar, Anil S. Gaikwad, Jack Yang, Helen E. Maynard-Casely, Yee Yan Tay, Jianhao Du, Haoyu Wang, Yin Yao, Zibin Chen, Jinxing Zhang, Shujun Zhang, Sean Li, Danyang Wang
Summary: Perovskite multiferroics have attracted significant attention in the development of multifunctional electronic devices. This study demonstrates the interface-driven multiferroicity in low-cost and eco-friendly bulk polycrystalline materials. The fabricated nanocomposites exhibit both room-temperature ferromagnetism and ferroelectricity, with a robust magnetoelectric coupling.
Article
Materials Science, Ceramics
U. K. Wadne, R. H. Kadam, K. M. Batoo, M. L. Mane, Sajjad Hussain, Sagar E. Shirsath, A. R. Shitre
Summary: The authors synthesized Eu-substituted Bi-Fe-Mn multiferroics and investigated the effects of different Eu doping concentrations on the crystal structure, magnetic and dielectric properties of the material.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Ram H. Kadam, Ravi Shitole, Santosh B. Kadam, Kirti Desai, Atul P. Birajdar, Vinod K. Barote, Khalid Mujasam Batoo, Sajjad Hussain, Sagar E. Shirsath
Summary: The stoichiometric compositions of a ferrite system with a chemical formula CoCr0.5DyxFe1.5-xO4 were prepared using the sol-gel auto-combustion method. The structural, morphological and magnetic properties were studied using various techniques. XRD analysis confirmed the cubic spinel structure of the samples. The cation distribution and magnetoelectric properties were also investigated.
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)
