Article
Engineering, Electrical & Electronic
Nyathani Maramu, D. Ravinder, T. Anil Babu, M. Srinivas, B. Ravinder Reddy, G. Sriramulu, Katlakuntla Sadhana, N. V. Krishna Prasad
Summary: A series of silver-doped strontium hexaferrite were synthesized by the Co-precipitation method, and their crystal structure, morphology, and microwave absorption properties were studied. The results showed that the lattice parameters increased and grain size decreased with the increase of Ag doping, leading to improved microwave absorption properties in X-band frequencies. The study confirmed the nature of microwave absorption for Ag-doped strontium hexaferrite.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Polymer Science
Jan Kruzelak, Andrea Kvasnicakova, Michaela Dzuganova, Lenka Haskova, Rastislav Dosoudil, Ivan Hudec
Summary: Magnetic soft ferrites, namely manganese-zinc ferrite, nickel-zinc ferrite and their combinations, were incorporated into acrylonitrile-butadiene rubber with carbon fibers to fabricate composite materials. The effect of the fillers on absorption shielding performance of the composites within the frequency range 1-6 GHz was investigated. Results showed that the absorption shielding efficiency of both composites increased with increasing proportion of nickel-zinc ferrite. The addition of carbon fibers and ferrites resulted in lower absorption shielding performance due to their higher electrical conductivity and permittivity.
Article
Materials Science, Ceramics
Jiali Song, Yu Gao, Guoguo Tan, Qikui Man, Zhi Wang
Summary: In this study, spinel Ni-Zn ferrites with excellent microwave absorption properties were synthesized and their absorption characteristics and interaction mechanisms were investigated. The results showed that S-NZFO had a wide effective absorption bandwidth and high saturation magnetization, while H-NZFO had small particle size and high complex permittivity. Both materials demonstrated potential as efficient microwave absorbers in military and civilian applications.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Zihao Chen, Dawei Mu, Tianhao Liu, Zilong He, Yi Zhang, Huaming Yang, Jing Ouyang
Summary: A three-phase PANI/BaFe12O19@Hal heterostructure was designed and fabricated in this study as an efficient lightweight electromagnetic wave absorbing material. The material exhibited the best microwave absorption performance when the weight ratio of PANI was 40%, with a frequency bandwidth of 9.60 GHz and a minimum absorption peak of 14.77 dB at 11.92 GHz. Introducing halloysite improved the microwave absorption performance and enriched the absorbing mechanism of the composite materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Materials Science, Composites
Xiaojun Zhu, Andrew J. Fairbanks, Travis D. Crawford, Allen L. Garner
Summary: The study focuses on predicting the behavior of composites containing high dielectric and/or magnetic inclusions at microwave frequencies using commercial finite element software and effective medium theories (EMTs). Modelling results suggest that limited aggregations of high dielectric contrast inclusions may enhance the effective dielectric properties of composites, serving as predictive tools for guiding composite design.
COMPOSITES SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Fan Qiu, Zhanyong Wang, Min Liu, Zemin Wang, Song Ding
Summary: MXene/NiFe2O4 nanocomposites were successfully prepared via one-step hydrothermal method, showing improved magnetic and electromagnetic properties with the introduction of MXene. The microwave absorption performance was enhanced with the addition of MXene nanosheets.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Multidisciplinary
Seyed Mahmood Tabatabaei Fard, Mahmood Moradi, Mohammad Mehdi Golshan
Summary: Substituting various concentrations of Ti, Mn, and Zn for the ferric cation in M-type Ba-hexaferrite, this study synthesized BaTi2xMnxZnxFe12-4xO19/MWCNT nanocomposites through modified sol-gel auto-combustion synthesis. The successful substitution of cations in the hexagonal lattice structure was confirmed, and the nanocomposites showed appropriate microwave absorption properties. These developed nanocomposites are recommended for use in equipment where thickness and weight of the absorbing material are important.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Materials Science, Multidisciplinary
Lei Guo, Yusong He, Dong Chen, Bin Du, Wei Cao, Yadong Lv, Zhijun Ding
Summary: In this study, nickel ferrite/multiwalled carbon nanotubes hybrids were successfully synthesized on a large scale by the hydrothermal method, and their structural, morphological, electromagnetic, and microwave absorption properties were analyzed in detail. The optimized sample exhibited excellent microwave absorption performance, indicating great potential for practical applications.
Article
Materials Science, Ceramics
Muhammad Zarrar Khan, Iftikhar Hussain Gul, Farooq A. Tahir
Summary: Ba-Sr hexaferrite nanoparticles were synthesized using Sol-Gel auto combustion, and their composites with MWCNTs and conductive polymers were synthesized using carrier fluid ultra-sonication dispersion and in-situ polymerization. Structural investigations were conducted to analyze the samples. The results showed good energy dissipation behavior and decreased magnetism in the composites due to weakened exchange coupling or domain wall pinning. The microwave absorption of the samples was evaluated, and the maximum total shielding effectiveness was observed at resonant frequencies relevant to military radars.
CERAMICS INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Nurshahiera Rosdi, Raba'ah Syahidah Azis, Ismayadi Ismail, Nurhidayaty Mokhtar, Muhammad Misbah Muhammad Zulkimi, Muhammad Syazwan Mustaffa
Summary: The study demonstrates that the hybrid of spiraled multiwalled carbon nanotubes and barium hexaferrite nanoparticles exhibits excellent microwave absorption properties, making it a promising microwave absorber for applications in X and Ku bands.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
D. Padmapriya, D. Dhayanithi, M. T. Rahul, Nandakumar Kalarikkal, N. Giridharan
Summary: This article systematically studied room-temperature magnetoelectric coupling in 0-3 particulate and 2-2 laminated composite structures, showing significant variations in electrical polarization and magnetization parameters in composite samples compared to pristine BTO and NFO. The perceived strain-mediated magnetoelectric coupling is strongly dependent on the relative mass ratio of BTO and NFO in both the particulate and laminated structures. An enhanced magnetoelectric coefficient of 25.23 mV/cm.Oe was achieved for the sandwiched-laminated structure of (1-x)BaTiO3 and (x)NiFe2O4 with x=0.45 at an applied magnetic field of 1.34 KOe.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Ceramics
Shivanshu Goel, Avesh Garg, Himangshu Bhusan Baskey, Sachin Tyagi
Summary: Low-density composites based on carbon black and barium hexaferrite were synthesized for microwave absorption, with the addition of carbon black enhancing electrical properties while increasing dielectric loss tangent. The composite containing 80% CB and 20% BaFe12O19 exhibited excellent microwave absorption properties with low reflection loss and wide bandwidth, attributed to increased dielectric properties leading to better impedance matching.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
M. Zareef Khan, Hur Abbas, K. Nadeem, Asad Iqbal, Ilse-Letofsky Papst
Summary: This study successfully synthesized hard barium ferrite, soft nickel ferrite, and their nanocomposites with different concentrations. The results showed that the nanocomposites exhibited strong magnetic interactions and spring exchange coupling between the hard and soft magnetic phases, indicating potential technological applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Yu Lei, Wenfeng F. Wang, Guoguo Tan, Xiaoyun Shang, Xiangyun Huang, Qikui K. Man
Summary: Rare earth dysprosium-doped Z-type hexaferrite with uniform particle size and hexagonal flake shape were synthesized by the sol-gel method. The samples exhibit excellent soft magnetic properties, with saturation magnetization increasing gradually with the amount of Dy doping. Trace doping of dysprosium significantly improves the microwave absorption properties of Z-type hexaferrite, with a sample doped at x = 0.05 showing an exceptional reflection loss value of -52.6dB at 5.25 GHz and a maximum effective absorption bandwidth of 6.6 GHz, covering both C-band and X-band. Excessive doping leads to impurity phase generation and reduction in magnetic properties and microwave absorption, highlighting the importance of appropriate Dy3+ doping for enhancing the microwave absorption property of Z-type hexaferrite.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Qihua Liang, Zhaofei Tong, Jinxiang Guo, Man Wang, Qingrong Yao, Huaiying Zhou
Summary: Barium ferrite is a multiferroic material with excellent properties and can easily improve its performance through doping. By replacing Ba ions with Nd ions, the magnetic performance of the material is enhanced, leading to improved microwave absorption characteristics and a wider range of applications. When the doping content reaches 0.10, the material shows optimal performance with maximum saturation magnetization, coercive force, and microwave absorption properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Khushboo, Nikhar Bhargava, Khyati Anand, Praveen Malik, Puneet Sharma, Divya Jayoti, K. K. Raina
INTEGRATED FERROELECTRICS
(2017)
Article
Engineering, Electrical & Electronic
Shivani Jindal, Kamaldeep Kaur, N. K. Verma, Puneet Sharma
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2018)
Article
Chemistry, Multidisciplinary
Khushboo, P. Sharma, P. Malik, K. K. Raina
Article
Materials Science, Ceramics
Santhoshkumar Mahadevan, Sukhleen Bindra Narang, Puneet Sharma
CERAMICS INTERNATIONAL
(2019)
Article
Physics, Applied
Anoop Pratap Singh, O. P. Pandey, Puneet Sharma
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2020)
Article
Engineering, Electrical & Electronic
Shivani Jindal, Puneet Sharma
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Article
Physics, Applied
Samiksha Verma, Santhoshkumar Mahadevan, Chhavi Pahwa, Anoop Pratap Singh, Sukhleen Bindra Narang, Neha Aggarwal, Puneet Sharma
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2020)
Article
Engineering, Electrical & Electronic
Santhoshkumar Mahadevan, Vasant Sathe, V. Raghavendra Reddy, Puneet Sharma
IEEE TRANSACTIONS ON MAGNETICS
(2020)
Article
Engineering, Electrical & Electronic
Shivani Jindal, Puneet Sharma
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Engineering, Electrical & Electronic
Chhavi Pahwa, Santhoshkumar Mahadevan, Sukhleen Bindra Narang, Puneet Sharma
Summary: The exchange-coupled BaFe12O19 (BaM)/CoFe2O4 (CFO) and BaM/Co0.5Zn0.5Fe2O4 (CZFO) composites were synthesized using the autocombustion method, and the effect of soft phase weight fraction on structural, magnetic, and microwave properties was investigated. The composites showed strong dependence on exchange interactions between hard and soft magnetic spins, with higher saturation magnetization compared to BaM. The study developed exchange-coupled magnetodielectric materials with high dielectric constant and permeability for various microwave applications.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Materials Science, Ceramics
Anoop Pratap Singh, O. P. Pandey, Puneet Sharma
Summary: The study found that La3+ substitution significantly affects the hopping and relaxation mechanism of charge carriers, as evidenced by frequency-dependent imaginary impedance and electric modulus. Arrhenius plots showed parallel conduction mechanism in the system. The complex electric modulus spectrum distinguished the capacitive contribution of grain, grain boundary, and electric effect.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Shivani Jindal, Puneet Sharma
Summary: In this study, hydrothermally synthesized transition metal and rare earth doped ZnS nanoparticles were investigated for their structural, morphological, optical, and magnetic properties. The nanoparticles showed tunable optical band gaps and ferromagnetic nature, with potential applications in optoelectronic and spintronic devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Parminder Singh, Radhapiyari Laishram, Puneet Sharma, Jayant Kolte
Summary: The preparation and characteristics of BNT and NFO composite ceramics were investigated, revealing the optimum leakage current density and giant magnetocapacitance effect at certain NFO content.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Anoop Pratap Singh, O. P. Pandey, Puneet Sharma
Summary: Z-type ferrites with Bi2O3 and SiO2 additives were prepared, and their electrical transport properties were investigated by impedance spectroscopy. The results showed that the additives segregated along the grain boundaries and had their own resistance, which was confirmed by the peak broadening in the impedance spectra. The study also found that the dynamic process of charge carriers was temperature dependent.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
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)
