Article
Materials Science, Multidisciplinary
M. A. Almessiere, Y. Slimani, H. Attia, S. I. M. Sheikh, Ali Sadaqat, M. G. Vakhitov, D. S. Klygach, M. Sertkol, A. Baykal, A. V. Trukhanov
Summary: The study investigated the magnetization properties and exchange coupling of hard/soft nanocomposites by varying the ratios of different elements. The sample with the highest Zn content and the same Ni and Cu contents achieved higher saturation magnetization values at 10 K and 300 K. The waveguide approach was employed to study the electrodynamic properties of the samples.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Chemistry, Physical
Mohammad Rostami, Motahareh Jafarpour, Mohammad Hossein Majles Ara
Summary: The microwave absorption properties of Co-Al-Ti substituted barium hexaferrite-multiwalled carbon nanotubes (MWCNTs)-epoxy resin nanocomposites were thoroughly investigated in the frequency range of 1-18 GHz. The nanocomposites exhibited appropriate microwave absorption properties, high efficiency, light weight, and small thickness, making them promising candidates for microwave absorbers.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xiankai Fu, Bo Yang, Wanqi Chen, Zongbin Li, Haile Yan, Xiang Zhao, Liang Zuo
Summary: The microwave absorption properties of Ti2O3 were studied, revealing that Ti2O3 with vacancy defects has a wider effective absorption bandwidth possibly due to changes in the electric dipole state caused by the defects.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Dongyun Gui, Xiaohu Ren
Summary: W-type Ba1-xLaxCo2Fe16-yAlyO27 hexagonal ferrite was synthesized using the sol-gel auto combustion method. XRD patterns confirmed the formation of the W-type magneto-plumbite structure, while SEM analysis showed a reduction in grain size with La3+ and Al3+ doping. The complex permittivity and permeability were determined in the frequency range of 2 GHz to 18 GHz, and the enhanced EMW absorption was attributed to dielectric and magnetic loss mechanisms, quarter wavelength, and impedance matching. The La-Al doped ferrite exhibited larger dielectric loss compared to pristine Co2W hexagonal ferrite, attributed to increased Fe2+ concentration and reduced grain sizes. The composition x = 0.05 and y = 0.5 showed improved impedance matching and enhanced microwave absorption performance, with a reflection loss of -50.13 dB at 11.9 GHz and 7.0 mm thickness, as well as a -20 dB absorption bandwidth from 11.6 to 12.2 GHz. The prepared La-Al co-doped W-type barium hexaferrites hold potential for microwave absorption applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Anping Wang, Yu Gao, Guoguo Tan, Zhenchen Zhong, Qikui Man
Summary: Ni0.5Zn0.5Fe2O4 ferrites prepared by the sol-gel auto-combustion method exhibit excellent microwave absorption properties when sintered at 1350°C. Reflection loss peaks are observed in both low and high frequency regions.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Physical
Xinxin Wang, Kang Fu, Xiaoyi Wen, Shichao Qi, Guoxiu Tong, Xiaojuan Wang, Wenhua Wu
Summary: This study demonstrates that oxygen vacancy engineering can modulate the electric structure and properties of metal oxides to enhance microwave absorption. By tuning the thermal conversion temperatures, dual-shell CeO2 nanospheres with high oxygen vacancy concentration and proper conductivity can achieve superior microwave absorption capabilities.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Rong Ji, Min Yang, Jingqing Lv, Zihan Wang, Yi Shi, Xiaoli Song, An Xie, Junliang Liu, Ming Zhang
Summary: Surface carboxylation of barium hexaferrite (BaM) provides activated points for the preferential growth of polyaniline (PANI) on BaM particles, leading to tuned morphology and improved complex permittivity. The convex rods and dendrite-like morphology of PANI activate electron transport, enhance interfacial polarization, and result in excellent microwave absorption due to enhanced electromagnetic wave dissipation and combination of losses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Zhao Fei Tong, Chuang Tian, Qingrong Yao, Jinxiang Guo, Qihua Liang, Jianqiu Deng, Fangyu Gan, Jiang Wang, Huaiying Zhou, Guanghui Rao
Summary: In this study, a high-purity NdFe1-xNixO3 material was prepared by a sol method, and it was found that by adding a certain amount of nickel, the dielectric and magnetic properties of the material can be adjusted to a balance point, showing excellent microwave absorption performance.
CERAMICS INTERNATIONAL
(2022)
Review
Materials Science, Multidisciplinary
Anas Houbi, Zharmenov A. Aldashevich, Yomen Atassi, Z. Bagasharova Telmanovna, Mirzalieva Saule, Kadyrakunov Kubanych
Summary: This article mainly introduces the ferrite components in high-performance microwave absorbing composites, focusing on their absorption characteristics, preparation methods, and microwave absorption mechanisms.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Jie Xiong, Hong-Yan Zeng, Sheng Xu, Jin-Feng Peng, Fang-Yuan Liu, Li-Hui Wang
Summary: A facile strategy was proposed to fabricate S-doped flower-like BiOI microspheres, which showed enhanced photocatalytic performance by engineering the surface oxygen vacancy and exposed crystal planes.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Haoshan Jin, Jintang Zhou, Jiaqi Tao, Yansong Gu, Chunyi Yu, Ping Chen, Zhengjun Yao
Summary: By altering the pyrolysis temperature, the type and concentration of oxygen functional groups in ultrathin carbon nanosheets (UCS) can be changed to achieve good microwave absorption capabilities. It is found that the main processes of electromagnetic loss are polarization caused by field effects and induced effects brought on by strongly polar ester functional groups. The sample with the highest ester group content achieves an effective absorption bandwidth of 6.47 GHz at a pyrolysis temperature of 800°C. This research fills a theoretical gap in the understanding of polarization mechanisms in the microwave band and redefines the significance of ester groups.
Article
Materials Science, Ceramics
Yang Li, Yuchang Qing, Biao Zhao, Pengwei Bai, Rui Zhang, Haoyang Yao, Fa Luo
Summary: In this study, a Ti4O7/magnetic metal composite was designed and prepared using electrostatic assembly and in-situ reduction reaction, showing useful microwave absorption properties with wide broadband, strong absorption, and low filler amount. The results highlight the importance of filler ratio, frequency, and absorber thickness in tuning the electromagnetic characteristics of the absorber.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yingming Zhang, Yujie Yang, Congliang Chen, Dongyang Chen, Yuting Meng
Summary: ZnCoNiMg ferrites prepared through solid-state reaction show excellent magnetic and absorption properties, making them suitable for fabricating wave-absorbing materials.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Multidisciplinary
Tymon Warski, Jerzy Kubacki, Dariusz Lukowiec, Rafal Babilas, Patryk Wlodarczyk, Lukasz Hawelek, Marcin Polak, Bartosz Jozwik, Maciej Kowalczyk, Aleksandra Kolano-Burian, Adrian Radon
Summary: High-entropy ferrites (HEFs) are a new group of oxides with unique magnetodielectric properties, offering possibilities for high-frequency applications. Introducing Mg2+ and Cr3+ ions increases electrical conductivity and dielectric losses of HEFs. Certain HEFs exhibit high reflection losses and absorption properties, particularly at specific temperatures and frequencies. Adding HEFs to 3D printed composites greatly enhances absorption properties.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Materials Science, Ceramics
Xiaohu Ren, Xilou Pu, Hongfeng Yin, Yun Tang, Hudie Yuan, Huiqing Fan
Summary: By coating conductive polymer PANI on the surface of hexaferrite, the electromagnetic loss can be greatly enhanced, leading to improved microwave absorption capacity. The PANI@hexaferrite composite exhibited excellent absorption performance at various thicknesses, showing potential for extensive applications as microwave absorbers.
CERAMICS INTERNATIONAL
(2021)
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)