Article
Engineering, Electrical & Electronic
Ping Tang, Ming Cao, Jian Yu, Lifang Wang, Deqin Zhang
Summary: Bi1-xBaxFe1-yCryO3 nanoparticles were synthesized by a cost-effective method, and the effects of Ba and Cr doping on their structural, optical, and magnetic properties were investigated. The presence of Ba was found to suppress impurity phases in Cr-doped BFO, leading to phase transitions confirmed by diffraction patterns and Raman analysis. Ba-Cr co-doping resulted in reduced particle size and enhanced ferromagnetic properties, including improved magnetization and hysteresis loops.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Md Abu Mosa, M. K. Das, F. Alam, M. N. Khan, S. C. Mazumdar
Summary: The role of co-doping with Ba and Sm in BiFeO3 has been studied, and it is found that co-doped samples have improved dielectric and electric polarization properties. Sm doping notably increases the real part of initial permeability and relative quality factor, as well as the coercivity of Bi0.85Ba0.15FeO3 ceramics. This study is of great importance for the fabrication of magnetoelectric devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
A. Kathirvel, K. N. Indu Krishna, R. Ganga, A. Uma Maheswari, M. Sivakumar
Summary: By doping Zr4+ ions, the structure and performance of lead-free ferroelectric thin films can be improved, and the leakage current can be reduced. Zr doping can also reduce the aging problem caused by oxygen vacancies and enhance the photoconductive properties.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Materials Science, Ceramics
N. P. Samantray, B. B. Arya, R. N. P. Choudhary
Summary: The preliminary investigation of the structural and frequency-temperature dependence of dielectric and electrical characteristics of Ba/Zr modified Bismuth ferrite (BiFeO3) was reported. The synthesized compounds were found to have a perovskite rhombohedral structure according to X-ray diffraction analysis. The study of dielectric and electrical characteristics across a wide temperature range and different frequencies provided important results on conduction mechanism, relaxation process, and ferroelectricity of the samples.
JOURNAL OF ELECTROCERAMICS
(2023)
Article
Materials Science, Multidisciplinary
Yutong Li, Gang Wang, Zehui Lin, Peijia Bai, Jiao Han, Mingwei Li, Duan Mao, Yiming Zeng
Summary: The influence of La doping on lead-free multiferroic Bi1-xLaxFeO3 ceramics has been investigated, showing that La doping causes structural distortion, changes in the generation of secondary phases, variations in grain size, and increase in carriers, thus affecting the dielectric, ferroelectric properties, and leakage current characteristics.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Ceramics
Roger C. Oliveira, Eduardo A. Volnistem, Eduardo A. C. Astrath, Gustavo S. Dias, Ivair A. Santos, Ducinei Garcia, Jose A. Eiras
Summary: By utilizing high-energy ball cryomilling, fast firing, and spark plasma sintering procedures, Multiferroic Bi0.85La0.15FeO3 powders and ceramics were successfully synthesized under extreme conditions, showing high density, resistivity, nonlinear response, and enhanced ferroic properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Khiat Abdelmadjid, Vlad Alexandru Lukacs, Felicia Gheorghiu
Summary: In this study, Bi(0.9)Pb(0.1)Fe(1-x)TixO(3) (0.05 < x < 0.20) multiferroic ceramics were prepared and the effects of Pb and Ti substitutions on the dielectric and magnetic properties of BiFeO3 multiferroic ceramics were investigated. The results showed a slight enhancement of saturation magnetization with increasing Ti concentration.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Sukhendu Sadhukhan, Abhik S. Mahapatra, Ayan Mitra, Pabitra K. Chakrabarti
Summary: Nanocrystalline holmium orthoferrite (HoFeO3) was synthesized using the chemical sol-gel technique. Structural investigation and magnetization measurements revealed its multiferroic behavior, establishing its candidacy for multiferroic applications in M-E devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Anton Tuluk, Tadhg Mahon, Sybrand van der Zwaag, Pim Groen
Summary: The study found that combining ceramic particles with a non-conductive polymer can improve the poling efficiency and piezoelectric constant values of BiFeO3, leading to higher piezoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
K. Nadeem, M. Kamran, H. Z. Khokhar, I. Ahmed, F. Zeb, N. A. Noshahi
Summary: The structural, magnetic, and dielectric properties of spinel magnesium (Mg) doped nickel chromite (NiCr2O4) nanoparticles have been studied. The magnetic and dielectric properties of the nanoparticles can be modified by variations in the average crystallite size and magnetic exchange interactions.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
S. Leelashree, P. D. Babu, S. N. Kaul, S. Srinath
Summary: This work reports on the magnetic, dielectric and structural properties of the nanocrystalline Lu1-xHoxFeO3 (x = 0.0 - 1.0) solid solutions. The substitution of Ho at the Lu site increases the ground state magnetic moment and the spin reorientation temperature and compensation temperature increase with the Ho concentration. The magnetocrystalline anisotropy essentially governs the coercive field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Salma Aman, F. F. Alharbi, Soumaya Gouadria, Hafiz Muhammad Tahir Farid
Summary: The BaLax-Fe2-xO4 series nanomaterials synthesized via sol-gel technique exhibited changes in crystal size, lattice constant, grain size, and bulk density due to lanthanum ion substitution. The dc-resistivity and activation energy increased with increasing lanthanum content, while the temperature-dependent resistivity and activation energy decreased with increasing temperature. The magnetic characterization showed that all samples had soft magnetic nature, with high magnetic coercivity being crucial for high-frequency applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
S. Q. Yin, J. Feng, Y. P. Zheng, Z. Y. Ren, L. F. He, H. N. Li, F. Yang, S. T. Dang, S. Y. Chen, Y. C. Hu, J. Shang, X. W. Wang
Summary: Energy storage ceramics are important materials used in high temperature-resistant dielectric pulse power systems. This study prepared BCZT-BFMT ceramics using the sol-gel method and solid phase method, and investigated the effects of different doping amounts on their energy storage performance. The results showed that the sample with 50% doping content exhibited better dielectric properties.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
Yaohui Zou, Jingwen Lin, Weiping Zhou, Mingyuan Yu, Jiaming Deng, Zhenzhi Chen, Guangsheng Luo, Dunhui Wang
Summary: This paper investigates the properties of Ni-Zr co-doped barium ferrite through various experimental methods. The results show that this material exhibits excellent saturation magnetization and dielectric properties, making it suitable for multifunctional and miniaturized electronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Fei Xue, Yahui Tian, Fangfang Guo, Lan Qiu, Weijun Wang, Weikang Tang
Summary: In this study, the 0.8BiFeO3-0.2GdFeO3 (BFO-GFO) ceramics were synthesized by solid-state reaction method. The results showed that the ceramics exhibited significant ferroelectricity, high density, and excellent relaxor ferroelectric behavior. The conductivity of the ceramics was found to be influenced by the ionization of oxygen vacancies.
MATERIALS CHEMISTRY AND PHYSICS
(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)