Article
Materials Science, Multidisciplinary
Kiran Naz, Junaid Kareem Khan, Muhammad Khalid, Muhammad Saeed Akhtar, Zaheer Abbas Gilani, H. M. Noor ul Huda Khan Asghar, Gaber A. M. Mersal, Mohamed M. Ibrahim, A. Muhammad, M. G. B. Ashiq
Summary: A series of nickel substituted copper spinel ferrite nanoparticles were fabricated using sol-gel auto-combustion technique. The structural properties of the compound were determined through X-ray diffraction analysis. The dielectric properties of the synthesized nanomaterials were observed to vary with the nickel concentration, suggesting their potential application in microwave devices.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Polymer Science
Z. A. Alrowaili, R. M. Ahmed, Ahmed Saleh, Abdelazim M. Mebed, T. A. Taha
Summary: The dielectric properties of PVC-fGO films were studied in different temperatures, showing that the high dielectric constant values at low frequencies in different nanocomposites were induced by the space charge effect from electrode polarization. The maximum barrier height decreased with increasing temperature and was independent of the fGo content. The real dielectric modulus decreased with increasing fGO content, while the AC conductivity increased up to 0.3 wt% of fGO and then decreased.
Article
Materials Science, Ceramics
Junaid Kareem Khan, Muhammad Khalid, Ali Dad Chandio, Kiran Shahzadi, Zaheer Uddin, Ghulam Mustafa, Muhammad Saeed Akhtar, Naimat Ullah Channa, Zaheer Abbas Gilani
Summary: Spinel ferrites are widely studied due to their practical high frequency applications. Nickel spinel ferrites with varying aluminum doping concentrations were prepared and the dielectric properties were investigated.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Weibai Bian, Jiqiang Jia, Ruixuan Zhang
Summary: Pt/SrTiO3(STO)/LaNiO3(LNO) and Pt/STO/Pt structures were fabricated on Si substrates using sol-gel method. Dielectric tunability characteristics of these two structures are investigated over temperature range of 300-80 K. STO prepared on LNO exhibits better crystallinity and dielectric tunability than that prepared on Pt. Furthermore, LNO/STO/LNO structure exhibits similar tunability, lower tan delta, higher figure-of-merit (FOM) values, and better tunability symmetry compared with Pt/STO/LNO structure, demonstrating the better performance of LNO electrode than conventional inert metal electrodes.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
T. A. Taha, Sultan Alomairy, S. A. Saad, H. O. Tekin, M. S. Al-Buriahi
Summary: The study focused on the properties of glass composites containing WO3 prepared by the melt-quenching procedure, showing that the dielectric constant and conductivity of the samples increase at higher temperatures. The analysis indicates that the conduction mechanism in the glass samples mainly follows the correlated barrier hopping model, with activation energy calculations suggesting the involvement of the same charges in multiple processes.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Charanjeet Singh, Maria Vesna Nikolic, Sukhleen Bindra Narang, Antonio Sergio Bezerra Sombra, Di Zhou, Sergei Trukhanov, Larrisa Panina, Jasbir Singh, Alex Trukhanov
Summary: This study focuses on the preparation and microwave characterization of composites of M-type hexagonal ferrite with paraffin wax. The influence of Sr2+ ion content on material parameters, including grain morphology, dielectric, magnetic, conductivity, and reflection loss properties, was analyzed. The results indicate that higher Sr2+ ion content leads to lower dielectric and magnetic loss tangent, as well as increased AC conductivity with frequency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
M. Kamran, M. Anis-ur-Rehman
Summary: This study investigates the electrical properties of cerium-doped Co-ferrite nanoparticles and discovers their resistive switching effect. With increasing cerium substitution, the resistance, drift mobility, and dielectric constant decrease, while the activation energy increases. The study also finds that the sample with a cerium composition of x = 0.25 exhibits a larger hysteresis loop, making it suitable for nonvolatile ReRAM applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Laxmikant Banaj, Sadhana Agrawal
Summary: A series of Zr4+ doped MgFe2O4 samples were synthesized using the solid-state reaction method. The samples showed a single phase cubic spinel structure with irregular grain morphology. The electrical properties were investigated through dielectric constant and loss analysis, complex impedance spectroscopy, and AC conductivity calculation.
CURRENT APPLIED PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
S. Baul, T. C. Paul, K. Hoque, M. N. I. Khan, S. Islam, S. K. Sen, M. M. Kamal, P. Bala
Summary: NiFe2O4 nanoparticles supported with different wt% of DDA-MMT were successfully synthesized by sol-gel autocombustion method. The addition of DDA-MMT was found to influence the crystallite size, saturation magnetization, dielectric constant, and optical band gap of NiFe2O4. This study suggests that the physical properties of Ni ferrite can be modified by adding the right quantity of DDA-MMT as a supporting material, thereby expanding its potential applications.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Physics, Condensed Matter
Furhaj Ahmed Sheikh, H. M. Noor ul Huda Khan Asghar, Muhammad Khalid, Zaheer Abbas Gilani, Syed Mansoor Ali, Noor-ul-Haq Khan, Muhammad Ali Shar, Hareem Mufti, Abdulaziz Alhazaa
Summary: To alter the properties of Ni-Co ferrites for high frequency devices, Dysprosium (Dy3+) substituted Ni-Co ferrites were synthesized via sol-gel route. Structural analysis using X-ray diffraction (XRD) and Fourier transform infra-red spectroscopy (FTIR) showed a crystalline size of 14-21 nm and a lattice constant of 8.29-8.35 angstrom. FTIR spectra exhibited two characteristic absorption bands at 424 cm(-1) and 550 cm(-1). The dielectric parameters of these nanoferrites showed a decreasing trend with increasing frequency. The results suggest that these ferrites can be used in the fabrication of high frequency devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Multidisciplinary Sciences
A. Sathiya Priya, D. Geetha, J. Madhavan
Summary: This study investigates the effects of titanium and lanthanum doping on the properties of CaFe2O4 spinel ferrites. The doped ferrites exhibit well-crystallized structure, stable morphology, high dielectric constant, low loss, enhanced conductivity, narrow energy bandgap, and photocatalytic activity. The photocatalytic performance of the doped samples is demonstrated in the effective degradation of pollutants under visible-light irradiation.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Priyambada Mallick, Rashmiranjan Patra, Debabrata Mohanty, Santosh Ku. Satpathy
Summary: Ceramic powders of Cu doped lead Titanate were synthesized and used as filler in a polymer matrix. The structural and morphological characteristics of the polymeric composite were studied using X-ray diffraction and scanning electron microscopy. Impedance and modulus studies showed specific properties of the composite within certain frequency ranges. The ac conductivity variation with frequency at different temperatures exhibited Jonscher's universal power law.
SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES
(2022)
Article
Materials Science, Ceramics
S. Chahib, G. Leroy, B. Duponchel, C. Poupin, H. Ez-zahraouy, D. Fasquelle
Summary: This study compares the dielectric properties of BaSnO3 ceramics and thin films in terms of structure, morphology, frequency (20 Hz-1 MHz), and temperature (30℃-300℃). BaSnO3 solution was prepared using the sol-gel method, and thin films were deposited by spin-coating on substrates. Both ceramics and films showed a pure BaSnO3 phase with a cubic structure according to the X-ray diffraction spectra. The sintering temperature was adjusted to improve the crystalline quality of the ceramics. SEM photos confirmed the high quality of the film surface, with an average roughness of 1.8 nm measured by AFM. The dielectric constant (epsilon') at room temperature was found to be around 17 for ceramics and 13 for thin films at 1 MHz. The dielectric properties of BaSnO3 ceramics could be successfully replicated on thin films using a cost-effective deposition method.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Rohit Jasrotia, Pooja Puri, Virender Pratap Singh, Rajesh Kumar
Summary: Magnesium nanoferrites with manganese and silver substitutions were synthesized and studied for their electrical and dielectric properties. The materials exhibited high dielectric constant and low dielectric losses, making them suitable for power applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Crystallography
Jiuyuan Han, Mengjiao Chi, Liu Yang, Bing Liu, Minmin Mao, Hadi Barzegar Bafrooei, Zhongyan Ma, Yingjie Ren, Feng Shi, Ehsan Taheri-Nassaj, Dawei Wang, Kaixin Song
Summary: Dense composites of NaCl-NZO and HB-NZO-NaCl were prepared using the cold sintering process. The resulting ceramic composites showed promising characteristics with comparable permeability and dielectric constants suitable for radio-frequency electronic device applications. These findings indicate potential applications in wireless communication.