Article
Engineering, Electrical & Electronic
Jasvir Singh, Ravi Chand Singh
Summary: Iron and vanadium co-doped ZnO nano-structures were synthesized by solid state reaction method, and the increase in Fe content significantly modified the structural, optical, dielectric, and transport properties. Rietveld refinement of XRD data showed that lattice parameters and unit cell volume of wurtzite ZnO decreased with Fe doping, along with a decrease in crystallite size and increase in micro-strain observed from Williamson-Hall and size-strain analysis.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Gulzar Ahmad Lone, Mohd Ikram
Summary: This study investigates the structural and dielectric properties of pristine and Ni-doped spinel CoFe2O4. The samples were synthesized using a solid-state reaction approach, and the structural analysis confirmed a single-phase FCC cubic spinel structure. The cationic distribution revealed changes in occupancy due to doping. SEM and EDS were used for microstructural and elemental composition analysis. The study found the presence of orientational and interfacial polarization in the samples. The dielectric constant showed a temperature-dependent behavior, with an increase observed after reaching a certain temperature. CoFe1.9Ni0.9O4 exhibited low dielectric loss and strong relaxation behavior.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Anand Kumari, Sujata Sanghi, Ashish Agarwal, Ompal Singh
Summary: Composites of (1-x)BaTiO3- (x)Ba0.9Ca0.1Fe12O19 (x = 0.10, 0.20, 0.30) were synthesized using solid-state reaction technique, showing dual phase symmetry of hexagonal and tetragonal phases. The dielectric constant and magnetic properties increased with an increase in Ca-doped barium ferrite content. The conduction mechanism was found to be best explained by the overlapping large polaron tunneling (OLPT) model.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Bhoomika Yadav, Kamal K. Kar, Manas K. Ghorai, Devendra Kumar, Dharmendra Yadav
Summary: In this study, the effect of extrinsic and intrinsic point defects on the conductivity and dielectric behavior of CCTO synthesized using the molten salt method was investigated. It was found that extrinsic defects migration caused dielectric loss at low temperatures, while long-range conduction due to intrinsic defects accumulation resulted in higher losses at high temperatures. By doping Mg into CCTO, the loss was reduced and an almost temperature-independent dielectric constant was achieved.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
A. El Boukili, Lahcen Boudad, M. Taibi, K. Benkhouja, J. Aride
Summary: The polycrystalline powder of CoMnP2O7 was prepared using the solid-state reaction method, and the X-ray diffraction analysis showed the formation of a single-phase monoclinic lattice system. The material exhibited polycrystalline nature with grain size anisotropy according to the SEM images. CoMnP2O7 was identified as a wide direct band-gap material, making it potentially useful in electronic and optical device manufacturing. Dielectric measurements revealed its high dielectric constant and low losses, indicating its suitability for capacitor applications. It also displayed promising characteristics for both NTC and PTC thermistors.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Bablu Chandra Das, M. A. Matin, A. K. M. Akther Hossain
Summary: In this study, the BSZT compound was prepared and sintered at different temperatures to investigate its structural, morphological, dielectric, and ferroelectric properties. It was found that tetragonality and denseness of the microstructure are highest at 1250 degrees C, indicating a transformation to cubic structure and a weakening of relaxor ferroelectric behavior with further increase in sintering temperature. Additionally, the significant improvement in ferroelectric properties was observed with increasing sintering temperature.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
R. Rajesh, N. V. Giridharan, K. Ramesh Kumar, C. Karthika
Summary: This report investigates the room temperature magnetodielectric effect of polycrystalline BiFe0.8Mn0.2O3 ceramics. Mn-doping results in weak ferromagnetic response due to changes in the spiral spin ordering. Bi vacancies cause charge compensating oxidation of Mn3+/Mn4+, leading to weaker ferromagnetic properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Anand Kumari, Ompal Singh, Ekta Arya, Meenal Chauhan, Vibha Vermani, Sujata Sanghi, Ashish Agarwal
Summary: Multiferroic composites with varying concentrations of (1 - x) BaTiO3-(x) BaFe12O19 (x = 0.50, 0.60, 0.70) were successfully synthesized using the solid-state reaction method. The composites showed the presence of BaTiO3 as the ferroelectric phase and BaFe12O19 as the ferromagnetic phase. XRD analysis confirmed the formation of crystal structure and phase purity without any chemical reaction. The dielectric, electric, and magnetic properties of the composites were analyzed, and an enhancement in the magnetic parameters was observed with an increase in the ferrite content.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Arunmay Baidya, Abhigyan Dutta
Summary: Room temperature single phase stabilization of different metals (Zr, Cd, and Ca)-doped La6MoO12 compound was achieved by incorporating Dy2O3. The X-ray diffraction profiles confirmed the cubic fluorite (Fm3m) structure. The optical bandgap decreased with decreasing dopant ionic radius. The photoluminescence spectra indicated various trapping or defect states for the charge carriers. The complex impedance plot showed non-Debye-type relaxation and negative temperature coefficient of resistance (NTCR), suggesting the dopant's role as an acceptor or donor. The ac conductivity followed the small polaron hopping mechanism, and a thermally activated single relaxation process was observed. The composition La5.4Dy0.4Zr0.2MoO12.1 exhibited the highest conductivity at 680 degrees C.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Ceramics
J. Mohammed, Khalid Mujasam Batoo, A. S. Abdulaziz, A. S. Safana, H. Y. Hafeez, Emad H. Raslan, Muhammad Hadi, AbdulAziz K. Assiafan, Ahamad Imran, A. K. Srivastava
Summary: The influence of Er3+-Mn2+ substitution on the properties of Y-type hexaferrites was investigated, showing a clear relationship between substitution concentration and sample characteristics. Various analyses revealed changes in dielectric, impedance, grain boundary characteristics, etc., caused by different substitution concentrations.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sourour Ben Yahya, Bassem Louati
Summary: This work focuses on the structural, vibrational, and electrical properties of K2ZnGeO4 ceramic compound, revealing a well crystallized orthorhombic structure with specific functional group. The electrical measurements indicate that the conductivity and relaxation process are influenced by the same factor.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Rajesh Kumar, Muhammad Hadi, Emad H. Raslan
Summary: Sr2+ doped Ba0.9-xCa0.1SrxTi0.8Zr0.2O3 nano-ceramics were synthesized by the conventional solid-state reaction method. XRD analysis confirmed the formation of a single-phase orthorhombic ABO3 structure, with increased crystallite size and decreased lattice parameter, dislocation density, and apparent density with doping. Porosity increased with doping, and various spectroscopy techniques revealed structural and compositional changes in the materials.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Bhagyashree Mohanty, S. Bhattacharjee, S. N. Sarangi, N. C. Nayak, R. K. Parida, B. N. Parida
Summary: In this study, a single-phase material 50BLFO-50BST was successfully synthesized with good crystallinity and optical properties. The investigations of dielectric, impedance, and modulus properties suggest the material has potential electromagnetic characteristics. The material is identified as a promising candidate for magnetic storage devices based on the room temperature ferromagnetic parameters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
K. Chandrakanta, R. Jena, P. Pal, Md F. Abdullah, S. D. Kaushik, A. K. Singh
Summary: In this study, cobalt-modified brownmillerite KBFO polycrystalline was synthesized through solid-state reaction. The Co substitution led to a decrease in optical bandgap energy and a shift in Raman peaks towards lower wavenumber. Additionally, the dielectric constant and dielectric loss of KBFCO decreased at room temperature compared to KBFO, indicating a reduction in oxygen migration and modification in response to vibrational modes.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Ram Awdhesh Kumar, Alo Dutta, T. P. Sinha
Summary: The vibrational and microwave dielectric properties of xLa(Mg1/2Ti1/2)O-3-(1-x)Ba(Mg1/3Nb2/3)O-3 materials synthesized by solid-state reaction were investigated. The materials exhibited high dielectric constant at microwave range and their crystal structures varied with the composition. The factors affecting the microwave dielectric properties were discussed based on vibrational and structural data.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Neelam Hooda, Reena Sharma, Ashima Hooda, Satish Khasa, Sonia, Krittika Dembla
Summary: The ferrite samples Ni0.5MgxZn0.5-xFe2O4; (x = 0.1, 0.2, 0.3 and 0.4) were synthesized using a conventional solid-state reaction procedure. Various analyses were performed to study their microstructure, chemical composition, dielectric properties, and AC conductivity, revealing important relationships such as the decrease in saturation magnetization with increasing Mg content and the frequency-dependent behavior of dielectric properties. These ferrites show potential applications in memory devices and transformer core materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Environmental Sciences
Rajesh Rohilla, Satish Khasa, Ashima Hooda
Summary: Glass-ceramics with novel composition have been synthesized using melt quench technique, and their dielectric and electrical properties have been characterized. The results indicate that these glass-ceramics show promising potential as eco-friendly and safe dielectric materials.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Vikas, M. S. Dahiya, Ashima Hooda, Satish Khasa
Summary: Transition Metal Ion (TMI) doped barium-boro-bismuthate glasses were synthesized using melt quench technique. The physical and structural behavior of the synthesized and annealed compositions were analyzed. The results showed that the density of the glass samples increased with the increase in MoO3 concentration, while the concentration of Non-Bridging Oxygen (NBO) decreased. The microstructure analysis using FESEM/EDX technique confirmed the crystalline growth in the annealed samples.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Ceramics
Rajesh Rohilla, M. S. Dahiya, Ashima Hooda, A. Agarwal, Satish Khasa
Summary: In this study, a glass system with multiple components was prepared using the melt quench technique, and various analyses and investigations were conducted. The results showed that these glasses possessed unique structures and properties, suggesting their potential applications in the field of biomedicine.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Physics, Condensed Matter
Neelam Hooda, Reena Sharma, Ashima Hooda, Satish Khasa
Summary: Composite samples of BaFe12O19/CoFe2O4 and CoFe2O4 ferrites were successfully synthesized via solid-state reaction, and their properties were characterized using X-ray diffraction, scanning electron microscope, and EDX spectroscopy.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: The double perovskite system La2Co1-xFexMnO6 (x = 0, 0.2, 0.5, 0.8 and 1.0) was synthesized using the sol-gel method. The synthesized samples were characterized using XRD and FESEM, and the results showed an increase in lattice parameters and unit cell volume with the increase in Fe content. The electrical and thermal properties of the samples exhibited frequency and temperature dependence, with a negative temperature coefficient of resistance behavior and semiconducting conductivity.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Meena Malik, Amita Khatri, Ashima Hooda, Manjeet S. Dahiya, Satish Khasa
Summary: Glasses with compositions xFe2O3.(55-x)B2O3.10Bi2O3.10CaO.25LiF (x = 0, 1, 2, 3, 5 and 7 mol% ) have been synthesized and their properties have been explored. The glasses show non-crystalline nature and Fe3+ exists in distorted octahedral coordination. Dielectric parameters, modulus analysis, impedance spectroscopy, and conductivity measurements reveal the electrical behavior of the glasses. The optical band gap of the glasses decreases with increased iron content.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Jyoti Dahiya, Ashima Hooda, Ashish Agarwal, Satish Khasa
Summary: A glass series doped with alkali fluoride in borate glasses was prepared and studied for its structural, physical, optical, and lifetime decay properties. The ratio of RE ions influenced the optical properties, and the glass showed enhanced ionic character by Sm3+ ion co-doping. The glass exhibited diverse emission colors that varied with excitation wavelengths and RE ion concentration.
Article
Chemistry, Physical
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: In this research, La2_xPrxCoMnO6 (x = 0.5, 1.0, 1.5, and 2.0) double perovskites were synthesized using sol-gel method. The X-ray diffraction analysis confirmed the absence of impurities and suggested the existence of ordered monoclinic, disordered orthorhombic, and rhombohedral structural phases. The morphological and compositional study showed that the samples had micrometer-range grain sizes and high purity. The dielectric and magnetic properties of the samples were strongly influenced by bond angle and exhibited similar variation tendencies with Pr substitution, indicating a coupling between these properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Reena Sharma, Neelam Hooda, Ashima Hooda, Satish Khasa
Summary: A detailed study of the magnetic behavior of double perovskites was conducted by developing La2Co1-xFexMnO6 using the sol-gel technique. The results showed that substituting Fe on the Co-site led to a systematic decrease in saturation magnetization but improved the magnetic properties at lower substitution levels.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Rajesh Rohilla, Satish Khasa, Ashima Hooda
Summary: The material with a composition of 7P2O5.19CaO.24Na2O.50B2O3 (mol%) was synthesized using the melt quenching technique. In vitro experiments were conducted by immersing the sample in a phosphate solution. The structural characterization, dielectric measurements, and ac conductivity analysis were performed, revealing the ceramic nature of the sample and the formation of hydroxyapatite after immersion in the phosphate solution.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Materials Science, Multidisciplinary
Madeeha Riaz, Manahil Najam, Hina Imtiaz, Farooq Bashir, Tousif Hussain
Summary: This study focuses on the structural and biological analysis of Zn-Cu based biodegradable alloys for orthopedic applications. The results indicate that the alloys have good electrical conductivity and biocompatibility, with potential for promoting bone growth and healing process. Additionally, the alloys exhibit a low corrosion rate and improved corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rijo Rajeev, Sk Safikul Islam, Anitha Varghese, Gurumurthy Hegde, Suryasarathi Bose
Summary: In this study, a facile and selective electrochemical sensor was developed for the sensing of guanosine. The sensor utilized a unique porous structure and ordered framework, enabling linear detection of guanosine concentration in the range of 0.123-720 μM under specific conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rafael V. M. Freire, Dominique Celeste de A. Dias, Jose Yago Rodrigues Silva, Dayane Kelly Dias do Nascimento Santos, Larissa T. Jesus, Ricardo O. Freire, Severino A. Junior
Summary: This study reports the extraction and isolation of euphol from nature, its adsorption in nanosized ZIF-8, and the efficacy of this system against cancer cells. Experimental and simulation results show that ZIF-8 can enhance the effectiveness of euphol against cancer cells and selectively target cancer cells.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Manal A. Awad, Awatif A. Hendi, Maha M. Almoneef, Maymunah Alwehaibi, Khalid M. Ortashi, Wadha Alenazi, Fatimah S. Alfaifi, Shareefa Alahmariye, Asma Alangery, Warda Ali Alghoubiri, Haia Aldosari
Summary: In this study, magnesium-doped zinc oxide nanoparticles were synthesized and characterized. The research findings show that magnesium doping can alter the crystal structure and optical properties of zinc oxide, while enhancing its dielectric constant.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
F. J. Willars-Rodriguez, I. R. Chaverz-Urbiola, M. A. Hernandez-Landaverde, A. Zavala-Franco, E. A. Chavez-Urbiola, P. Vorobiev, Yu V. Vorobiev
Summary: This study focuses on manganese doped CdS thin films synthesized by chemical bath deposition. The incorporation of Mn2+ cations in CdS was found to influence the crystalline structure, morphology, and optoelectronic properties. Doped thin films exhibited a uniform hexagonal structure, changed growth orientation, and showed scale-like and needle-like morphologies. The bandgap and rectification speed of Schottky diodes were modified by introducing manganese. This study suggests the potential for affordable high-speed optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Mehdi Javidi, Hooman Karimi Abadeh, Fatemeh Namazi, Hamid Reza Yazdanpanah, Narjes Shirvani Shiri
Summary: This study investigated the synergistic effect of temperature, solution velocity, and sulphuric acid concentration on the corrosion behavior of carbon steel using response surface methodology. The results showed that temperature affected anodic reactions, solution velocity influenced cathodic reactions, and acid concentration altered the corrosion mechanisms by changing the properties of the surface layer.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
R. Sakthivel, Thirumoorthy Kulandaivel, Kirankumar Venkatesan Savunthari, K. Mohanraj, Hans-Uwe Dahms, Aswin kumar Anbalagan, Manjunath Rangasamy, Kien-Voon Kong
Summary: In this study, saturated fatty acids were incorporated with silane to modify viscose fabric, resulting in superhydrophobic and superoleophilic properties. The modified fabric showed excellent separation efficiency for oil and organic solvents, with high absorption capacity. The modified fabric also exhibited durability and retained its properties in harsh conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Wei Zhang, Hong Lei, Wenqing Liu, Zefang Zhang, Yi Chen, Xiaogang Hu, Xiangshan Ye
Summary: In this study, EDTA-grafted alumina composite abrasives were produced by a two-step process for the CMP of sapphire substrates. Experimental results showed that the modified abrasives exhibited better dispersion properties and significantly improved polishing efficiency, with higher material removal rates and lower surface roughness. The combination of chemical reaction and mechanical action enhanced the CMP performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Shumaila Rafaqat, Bushra Perveen, Warda Raqba, Warda Imran, Arshad Hussain, Naeem Ali
Summary: This study developed a MnP-based biosensor for quantitative measurement of dye concentrations using electrochemical signals. The effects of two different dyes on MnP activity were investigated, with one dye showing inhibitory effects and the other dye having no effect. The study demonstrates the potential application of enzyme-based biosensors in dye detection and toxicological monitoring.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinyan Shi, Oguzhan Yavuz Bayraktar, Baris Bayrak, Burak Bodur, Ali Oz, Gokhan Kaplan, Abdulkadir Cuneyt Aydin
Summary: The elemental composition of precursors is crucial for the performance development of geopolymers. The use of lime instead of metakaolin increases the fluidity and mechanical properties of geopolymers, while the addition of gypsum decreases them. Furthermore, higher lime content exacerbates the negative effect of gypsum.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aayush Gupta, Kaveri Ajravat, Loveleen K. Brar, O. P. Pandey, Pandey Rajagopalan
Summary: This study focuses on the performance of Mn3O4-ZnO composite material in wastewater treatment and energy storage applications, and presents a detailed comparative analysis. Results show that the composite material with equal concentrations of Mn3O4 and ZnO exhibits excellent photocatalytic activity and high capacitance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
V. Murugabalaji, Matruprasad Rout, Harsh Soni, Biranchi Narayan Sahoo
Summary: This study focuses on the corrosion characteristics of AA 7075 and AA 7075 based hybrid composite fabricated using stir casting and hot rolling techniques. The results show that the hybrid composite produced by hot cross rolling exhibits better corrosion resistance compared to the base metal. The addition of a small amount of graphite improves the bonding between the matrix and reinforcements, and the hot cross rolling enhances this bonding, leading to the formation of a strong passivation oxide layer and increased charge transfer resistance, thereby improving corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Fangkun Ning, Qinghao Shi, Shuping Kong, Weitao Jia, Lifeng Ma
Summary: The paper investigates a new method of rolling sheets with variable chamfering amounts in both the transversal and normal directions. The feasibility of the technological process was tested through simulation and compared with experimental results. Three important process parameters, temperature, stress, and flow velocity, were used to evaluate the effects on chamfering amount before determining the optimal angle. The spread formula for evaluating the shape quality of the plate after ECR was obtained through testing and theory.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aqeel Abbas, M. A. Hussein, Mohamed Javid
Summary: In this study, the AM60 magnesium alloy was processed using high-energy ball milling, and the results showed that different reinforcement agents had certain effects on particle size, crystallite size, lattice strain, and dislocation density.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
D. S. Mahmoud, E. M. Eldesouki, W. M. Abd El-Gawad
Summary: The development of flexible and lightweight microwave-absorbing materials has become a trendy topic. This study focuses on enhancing the microwave-absorbing performance of butadiene-acrylonitrile rubber (NBR) by incorporating novel reinforcing nanofillers. The results show that the NBR nanocomposite with a loading of 16 parts per hundred rubber (phr) of LiFe 20%/Si has the best microwave-absorbing performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)