Article
Chemistry, Physical
Majid Niaz Akhtar, Nissren Tamam, Sunder Makhdoom, M. A. Baqir, Mustafa Z. Mahmoud, Muhammad Yousaf, Muhammad Azhar Khan, M. Irfan, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: In this study, Dy-Gd doped YIG nano ferrites with excellent absorbing power and low cost were prepared by a sol-gel self-ignition route. The effects of Dy-Gd on the structural and electromagnetic characteristics of YIG were evaluated using various characterization techniques. The results showed that Dy-Gd doped YIG ferrites exhibit promising performance for microwave absorption and electromagnetic shielding applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Majid Niaz Akhtar, Sunder Makhdoom, M. A. Baqir, Muhammad Yousaf, Muhammad Azhar Khan, Khalid Mujasam Batoo, Sajjad Hussain
Summary: This study proposes a metamaterial microwave absorber based on nano ferrites, which achieves desirable absorption features by optimizing the composition and structure of the material. The research shows that Sm doped Co ferrite at specific doping ratios exhibits high absorptivity and Q values, making it valuable for satellite communication applications.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Majid Niaz Akhtar, Zainab Mufarreh Elqahtani, Sabih Qamar, Abdullah Almohammedi, M. Irfan, Muhammad Azhar Khan, Muhammad Yousaf, Atif Nazir, Yuzheng Lu, Mustafa Z. Mahmoud, Muhammad Aslam, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: The absorption characteristics of Co, Cu, and Zn-doped Ni-Ce nano ferrites were investigated and it was found that the Zn-doped NiCe absorber showed excellent performance for Ku band absorption applications, making it suitable for next-generation multifunctional absorbers.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Ceramics
Yungui Li, Xia Wu, Jiangbo Chen, Aixia Cao, Reza Boudaghi, Majid Niaz Akhtar
Summary: Single- and double-layer electromagnetic wave absorbers were prepared using MWCNTs/BaTiO3/carbonyl iron composites, and their microwave absorption properties were evaluated experimentally and through simulation. The results showed that the double-layer absorber had better reflection loss and absorption bandwidth compared to the single-layer absorber.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Lei Zhang, N. Stalin, Ngo Tran, Sadok Mehrez, Mohamed Fathy Badran, V. Mohanavel, Qiang Xu
Summary: Due to the widespread use of wireless communication and electronic devices, electromagnetic radiation has become a global environmental pollutant. In this study, 3D architectures of CoFe2O4 and polypyrrole were successfully fabricated as microwave absorbers. The microwave dissipation features of double-layer absorbers showed better performance compared to single-layer absorbers, attributed to better impedance matching capability and coupling interaction.
CERAMICS INTERNATIONAL
(2022)
Article
Engineering, Electrical & Electronic
Soumya Sundar Pattanayak, S. H. Laskar, Swagatadeb Sahoo
Summary: This study presents a double-layer microwave absorber made from corn husk, which exhibits good absorption performance. The absorber is biodegradable, eco-friendly, and non-toxic, making it a viable alternative. The experimental results show that the absorber achieves maximum absorption performance within a certain frequency range.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Physics, Multidisciplinary
Hadi Teguh Yudistira, Kiki Kananda
Summary: The study focuses on designing a wideband single-layer metamaterial absorber in the S-band and C-band spectrum, showing slight discrepancies between numerical simulation and analytical estimation results, but overall demonstrating excellent accordance. The metamaterial absorber with cross-shaped unit cell presents high absorbance performance in the S-band and C-band spectrum.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Chemistry, Physical
Qingwen Zeng, Lei Wang, Xiao Li, Wenbin You, Jie Zhang, Xianhu Liu, Min Wang, Renchao Che
Summary: The study focuses on regulating Ni-MOF-derived pomegranate-like Ni@C microspheres through a double organic ligand strategy and pyrolysis treatment, resulting in controlled morphology and crystallization. The pomegranate-like Ni@C microspheres possess abundant interfaces, a unique conductive network, and a magnetic dielectric synergy system, exhibiting excellent microwave absorption performance.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Qing Gang, Majid Niaz Akhtar, Reza Boudaghi
Summary: The study focuses on the preparation of lightweight absorbers with high performance capability to address severe electromagnetic pollution. Two different composites were incorporated into resin epoxy matrix to obtain single and double layer X-band absorbers with minimum reflection loss values reaching -15 dB and -50 dB respectively. Assembling a two-layer absorber further improved the performance, with a minimum reflection loss of -52 dB achieved.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Materials Science, Ceramics
Talaat A. Hameed, A. A. Azab, R. S. Ibrahim, K. E. Rady
Summary: Magneto-optical TiO2/xCoFe(2)O(4) nanocomposites with various concentrations of CoFe2O4 were prepared using mechanical mixing. These nanocomposites exhibited ferromagnetic characteristics and their magnetic parameters were influenced by the percentage of CoFe2O4 in the composites.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Xiaolei Zhu, Xiaoping Wang, Kuili Liu, Honglei Yuan, Reza Boudaghi, Majid Niaz Akhtar
Summary: This research focuses on evaluating the microwave absorption characteristics of a three-layer absorber through thickness optimization. Factors such as internal reflections, interfacial polarization, phase cancellations were found to significantly impact microwave absorption. By synthesizing different nanocomposites and optimizing their layer arrangement and thickness, the microwave absorption performance was improved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Jiaqi Tao, Jintang Zhou, Zhengjun Yao, Zibao Jiao, Bo Wei, Ruiyang Tan, Zhong Li
Summary: The study focused on the micro-morphology design of nanomaterials for improved microwave absorption properties. Results showed that the multi-shell structure enhanced the microwave absorption performance of carbon nanoparticles, with the three-shell structure achieving an effective absorption bandwidth of 5.17 GHz at a thickness of 1.6 mm and a best reflection loss of -18.13 dB.
Article
Materials Science, Ceramics
M. I. Piracha, G. Murtaza, Ghazanfar Nazir, Taharh Zelai, Nuriyah Mohammed Aloufi, M. Hassan, Thamraa Alshahrani, Hisham S. M. Abd-Rabboh
Summary: The study investigates the impact of PEEK on the properties of substituted SrM hexaferrite. Nanocomposites of SrM/PEEK in different ratios were prepared with the micro-emulsion method. Characterization techniques including XRD, SEM, FTIR, and VNA were carried out to analyze the composites. The results showed changes in structure, magnetic nature, and microwave properties of the materials due to the presence of PEEK and ferrite concentration in PEEK.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Mingming Zhang, Ali Hassan, Sadok Mehrez, Ibrahim Mahariq, Ali E. Anqi, Ibrahim Elbadawy, Sagr Alamri
Summary: In this study, hierarchical flower-like MoSe2 structure and rod-like MnFe2O4@MnO2 architecture were fabricated via a solvothermal method to investigate microwave absorption properties. The flower-like MoSe2 structure showed better performance than the rod-like MnFe2O4@MnO2 structure in single-layer samples. In bilayer absorbing samples, a top layer with a flower-like MoSe2 structure exhibited high absorption performance. Through adjusting the thickness of both layers, an optimal bilayer sample was achieved with a flower-like MoSe2 structure as the top layer and MnFe2O4@MnO2 as the bottom layer, showing decent absorption with an effective absorption bandwidth of 5.4 GHz.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Mohd Rehan Ansari, Somnath Khaladkar, Archana Kalekar, Moon-Deock Kim, Koteswara Rao Peta
Summary: The aim of this study is to investigate the effect of annealing temperature on the properties of green synthesized ZnFe2O4 nanoparticles. The results show that annealing at 400 degrees C leads to significant improvement in electrochemical energy and increase in crystallite size. Furthermore, the optical bandgap and magnetic properties of ZFO NPs are also affected by annealing temperature.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Ceramics
Bo Zhang, Ibrahim Mahariq, Ngo Tran, Mustafa Z. Mahmoud, Majid Niaz Akhtar
Summary: A magnetic core-double shells structured composite has been developed to protect the core from oxidation and improve complex permittivity. The composite showed significant performance in terms of reflection loss and effective absorption bandwidth, with maximum dissipation capacity of -32.5 dB at 16.5 GHz. Enhancements in microwave dissipation arise from synergistic influences of various phenomena such as interfacial polarization and proper impedance matching.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Muhammad Yousaf, Shoaib Nazir, Muhammad Akbar, Majid Niaz Akhtar, Asma Noor, Enyi Hu, M. A. K. Yousaf Shah, Yuzheng Lu
Summary: In this study, rare earth-doped Gd oxide in mixed Co-Mn spinel ferrite nanoparticles was synthesized using a sol-gel autocombustion approach. The magnetic and electrical properties decreased with increasing Gd3+ ion content, but the samples exhibited semiconducting behavior.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Condensed Matter
Muhammad Aamir, Waqas Aleem, Majid Niaz Akhtar, Aamir Alaud Din, Ghazala Yasmeen, Muhammad Naeem Ashiq
Summary: In this study, Co-Zr doped Ni ferrite substituted polyaniline (PANI) nanocomposites were prepared using a polymerization reaction method, and their photocatalytic efficiency was evaluated through a series of characterization experiments. The results confirmed the potential application of the prepared PANI/NiFeCo0.5Zr0.5O4 nanocomposites as suitable photocatalysts for the removal of methyl orange in aqueous media.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Ceramics
Yuzheng Lu, Muhammad Yousaf, Majid Niaz Akhtar, Asma Noor, Muhammad Akbar, M. A. K. Yousaf Shah, Senlin Yan, Faze Wang
Summary: In this study, rare earth Gd oxide doped CoFe2O4 NPs were synthesized using sol-gel auto-combustion, and their physical, magneto-optical, and electrical characteristics were investigated. The results showed that increasing content of Gd oxide and Co ions led to decreasing crystallite and grain sizes, as well as magnetic saturation in the synthesized NPs. Additionally, the synthesized samples exhibited semiconductor properties and showed a conducting trend at higher temperatures.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Muhammad Yousaf, Yuzheng Lu, Enyi Hu, Baoyuan Wang, Majid Niaz Akhtar, Asma Noor, Muhammad Akbar, M. A. K. Yousaf Shah, Faze Wang, Bin Zhu
Summary: The study introduces BiNdxCrxFe1-2xO3 nanoparticles with electromagnetic matching that show tunable magneto-optical and feasible microwave absorption characteristics for microwave absorber applications. Co-doping of Nd and Cr plays a key role in ordering the BFO crystal structure, leading to enhanced microwave absorption properties.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Muhammad Junaid, Muhammad Azhar Khan, Tahani Al-Muhimeed, Abeer A. AlObaid, Ghazanfar Nazir, Thamraa Alshahrani, Q. Mahmood, Majid Niaz Akhtar
Summary: The influence of indium on the properties of Cu0.5Zn0.5Fe2O4 nano ferrites was studied, showing that the inclusion of indium can enhance crystalline structure stability and dielectric properties within a certain range of concentration, while decreasing magnetic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Pengfei Huang, Yinwei Wang, M. A. El-Shorbagy, Majid Niaz Akhtar, Huynh Tan Hoi
Summary: Hydrothermal and in-situ polymerization methods were used to successfully fabricate a pompon flower-like CoGd0.5Fe1.5O4 (CG) as a magnetic component and a cauliflower-like poly(indole-co-Py) (PP) co-polymer as a dielectric component for microwave absorption. The physico-chemical properties of CG/PP samples were determined via XPS, XRD, FTIR, BET, UV-vis, EDS, and FESEM analysis. VNA and VSM were used to evaluate the dielectric and electromagnetic properties of the CG and PP samples. The results of the absorption capability tests revealed that bi-layer samples outperformed single layer samples in terms of microwave dissipation capability. The thickness and arrangement of each layer in bilayer absorber effectively adjusted via MATLAB simulation. As a consequence, the effective absorption bandwidth in the bilayer absorber has been increased and covers the C and X bands entirely with a thickness of only 2 mm, in which 1 mm of CG composite layer with 1 mm of thickness is placed as an absorbing layer and a PP composite layer with 1 mm of thickness is considered as a matching layer. The hierarchical structure of both components (pompon and cauliflower-like morphology) may increase interfacial polarization, relaxation loss, and consequently attenuation constant of the absorber as well as improve impedance matching characteristics and decrease in density. Synergistic effects between two distinct layers containing magnetic and dielectric components may further increase the absorption feature.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Min Ji, Pengfei Ji, Sadok Mehrez, Sagr Alamri, Majid Niaz Akhtar
Summary: The current study describes the fabrication and analysis of a bi-layer microwave absorber made of magnetic Sr2FeReO6 (SRO) powder and a magnetoelectric nanocomposite formed of rod-like magnetic Sr2FeReO6 powder wrapped in polygonal SnS2 powder (SRSS). The analysis showed that successful synthesis of rod and polygonal particles with soft magnetic properties was achieved. The designed bi-layer absorber exhibited broad X-band frequency absorption capabilities, with a reflection loss of -33 dB at 10.3 GHz and a thickness of only 2.5 mm.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Muhammad Azhar Khan, Sohail Afzal, Shagufta Gulbadan, Khalid Mahmood, Ghulam Abbas Ashraf, Majid Niaz Akhtar
Summary: Nano-crystalline Gd-substituted X-type hexaferrites with different Gd concentrations were synthesized and their properties were studied. X-ray diffraction confirmed the single and pure phases of hexagonal ferrites. The dielectric properties showed frequency dependence and suggested potential applications in high-frequency devices and supercapacitors. Raman spectra and SEM images further supported the findings.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Condensed Matter
Raees M. Asif, Abdul Aziz, Majid Niaz Akhtar, M. Amjad, Muhammad Azhar Khan
Summary: In this study, a Terbium doped Nickel-Zink nano-ferrite material was prepared and used as a substrate in a dual-band yagi-Uda-shaped 4 x 4 multi input multi output antenna. The properties of the ferrite material were evaluated using XRD, VSM, and SEM analysis. The MIMO antenna demonstrated improved performance in terms of size, bandwidth, isolation, and Channel Capacity Loss when compared to conventional FR4 substrates.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Song Zhao, Mohamad Reda A. Refaai, Sadeq Salman, Majid Niaz Akhtar, Kang Du
Summary: The study proposes a method of optimizing the structure and absorber thickness, and increases the absorption performance of the NiCo2S4/AgBr nanocomposite by modifying the filler loading in the composite matrix. The results show that the thinnest layer with a thickness of 1.4 mm has a minimum reflection loss of -24 dB at 9.7 GHz, and the absorption bandwidth is 3.8 GHz. The measurement of electromagnetic radiation patterns demonstrates strong high-frequency absorption responses at 10.9 GHz and 11.4 GHz for samples with 25 wt.% and 35 wt.% filler loading. The key factors in improving the reflection loss and absorption efficiency are excellent conductive response, better matching properties, and electromagnetic losses.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Kanwal Majeed, Muhammad Azhar Khan, Raqiqa Tur Rasool, Shagufta Gulbadan, Abeer A. AlObaid, M. Irfan, Ghulam Abbas Ashraf, Ghazanfar Nazir, Majid Niaz Akhtar
Summary: Recently, nano-sized Z-type hexagonal ferrites with Indium substitution have been synthesized and shown to have excellent properties for microwave absorption and resolving EM pollution. These materials also have significant applications in EM interference shielding and radar cross-section reduction, making them suitable for stealth technology.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Majid Niaz Akhtar, Zainab Mufarreh Elqahtani, Sabih Qamar, Abdullah Almohammedi, M. Irfan, Muhammad Azhar Khan, Muhammad Yousaf, Atif Nazir, Yuzheng Lu, Mustafa Z. Mahmoud, Muhammad Aslam, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: The absorption characteristics of Co, Cu, and Zn-doped Ni-Ce nano ferrites were investigated and it was found that the Zn-doped NiCe absorber showed excellent performance for Ku band absorption applications, making it suitable for next-generation multifunctional absorbers.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Xiaoli Wang, Ali Hassan, Mohamad Reda A. Refaai, Mahyuddin K. M. Nasution, Majid Niaz Akhtar
Summary: In the modern world, electromagnetic interference is a serious issue. To effectively prepare materials with excellent electromagnetic wave dissipation capabilities, researchers synthesized pompon-flower-like CoGd0.5Fe1.5O4 and sphere-like BiFeO3. The findings demonstrate that using BiFe as the first layer and CoGd as the second layer in a bi-layer absorber can improve impedance matching and achieve high absorption with a broad effective absorption bandwidth.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Majid Niaz Akhtar, Nissren Tamam, Sunder Makhdoom, M. A. Baqir, Mustafa Z. Mahmoud, Muhammad Yousaf, Muhammad Azhar Khan, M. Irfan, Z. A. Alrowaili, M. S. Al-Buriahi
Summary: In this study, Dy-Gd doped YIG nano ferrites with excellent absorbing power and low cost were prepared by a sol-gel self-ignition route. The effects of Dy-Gd on the structural and electromagnetic characteristics of YIG were evaluated using various characterization techniques. The results showed that Dy-Gd doped YIG ferrites exhibit promising performance for microwave absorption and electromagnetic shielding applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
