Article
Chemistry, Physical
Xingang Wang, Xinzhe Zhang, Lu Zhao, Chong Zhao, Huailong Zhang, Yezhi Du, Wen Zhang, Yajie Guo, Peng Cao
Summary: The study introduces a novel encapsulation rolling process for producing thin crack-free W-18.5 wt%Cu composite sheets. Increasing the rolling reduction ratio improves mechanical and electrical properties while decreasing electrical conductivity, thermal conductivity, and coefficient of thermal expansion. Optimizing the W-Cu interface bonding is crucial for achieving high electrical and thermal conductivity with a low CTE.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Maria Wisniewska, Alexander M. Laptev, Mateusz Marczewski, Volf Leshchynsky, Grzegorz Lota, Ilona Acznik, Luca Celotti, Alex Sullivan, Miroslaw Szybowicz, Dariusz Garbiec
Summary: Carbon nanotubes (CNTs) are widely used in ceramic-matrix composites (CMC) as a filler. They have high thermal conductivity individually, but only have a moderate influence on the thermal conductivity of CMCs. However, even a small quantity of CNTs can significantly increase the electrical conductivity of CMCs. The present study investigates the influence of multi-wall carbon nanotubes (MWCNTs) on the thermal and electrical conductivity of ZrO2-CNTs composites, revealing the contradictory effects of CNTs on these properties.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Hang Chi, Zewen Lin, Yuxin Chen, Renhao Zheng, Hong Qiu, Xiaolan Hu, Hua Bai
Summary: This paper reports on the direct ink writing 3D printing of multifunctional composite materials based on commercial epoxy resin and the recycling of printed composite materials. By adding graphene nanoplatelets as a thixotropic additive, the liquid epoxy resin can be shear-thinning and suitable for direct ink printing. The printed composite materials have high resolution, high mechanical strength, as well as high thermal and electrical conductivity, and fast thermo-induced shape memory response. The printed objects can be recycled by comminuting them into micropowders and used as a thixotropic agent for preparing recycled DIW ink.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
A. M. Abdelghany, M. S. Meikhail, W. M. Awad
Summary: An insulating polymer blend of chitosan/poly(epsilon-caprolactone), Ch/PCL 75/25Wt%, was successfully synthesized via traditional solution casting method, showing fast ionic motion facilitating ionic conduction. Samples containing increasing amounts of efficient fluorescent semiconducting CdSe quantum dots embedded in thin films of polymeric matrices were also prepared. The electronic transport characteristics were studied through AC conductivity measurements, revealing a temperature-independent dielectric constant and frequency-dependent loss tangent.
Article
Chemistry, Physical
Shigeru Katsuyama, Kohei Kamoya
Summary: A sintered composite made of p-type Si0.99B0.01 and insulative SiO2 particles was studied for its thermoelectric properties. The electrical conductivity and thermal conductivity of the composite were found to change with the volume fraction of Si0.99B0.01, showing specific trends at different stages of volume fraction increase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
H. H. Hegazy, C. Dinesh Sati, Pankaj Sharma, M. A. Jaafari
Summary: The study investigates the composition and temperature-dependent dc conductivity of (Ge20Se18Te62)100-xIx (x = 0 and 8) glasses, revealing the significant effect of iodine content on switching properties and the decrease in threshold voltage with changes in composition, while it increases with temperature and thickness changes. The threshold switching properties could have potential applications in high-speed electronic memory and selector devices.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
M. Suarez, D. Fernandez-Gonzalez, C. F. Gutierrez-Gonzalez, L. A. Diaz, A. Borrell, J. S. Moya, R. Torrecillas, A. Fernandez
Summary: This study investigates the effect of the degree of compaction of green parts on the properties of a Graphite-5.5 vol. % Molybdenum- 0.6 vol. % Titanium composite obtained by SPS. The composite exhibits different properties depending on the direction of the applied pressure, with significantly better in-plane properties. Samples uniaxially pressed at 60 MPa show highly improved properties comparable to those obtained under extreme conditions, suggesting the potential for industrial-scale production and applications as a heat sink.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Composites
Zhouqiao Wei, Xiangdong Kong, Jingzhen Cheng, Hua Zhou, Jinhong Yu, Shaorong Lu
Summary: A composite film consisting of PVA and Al2O3 with pearl-necklace-like structure was reported, showing high thermal conductivity, electrical insulation, and flexibility for thermal management in modern electronic devices. The composite film with 65 wt % Al2O3 loading exhibited enhanced thermal conductivity and retained excellent electrical insulation.
COMPOSITES COMMUNICATIONS
(2022)
Article
Energy & Fuels
Heegyeom Jeon, Jeong Ho Na, Yong Seok Kim, Seung-Keun Park, Youngjae Yoo
Summary: In this study, wave-selective emitter coolers were fabricated using glass bubbles and barium sulfate, and polyacrylonitrile nanofibers were electrospun on these coolers. The optical properties and cooling power were analyzed based on the ratio of glass bubbles and barium sulfate, as well as the electrospinning conditions. The cooler with the added electrospinning layer showed higher reflectivity and cooling power compared to the cooler containing only polydimethylsiloxane/glass bubbles and barium sulfate. This study improves the performance of previously studied passive radiative cooling.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Materials Science, Multidisciplinary
D. Gasca-Figueroa, G. Gutierrez-Juarez, F. J. Garcia-Rodriguez, L. Polo-Parada, A. Perez-Pacheco, M. G. Bravo-Sanchez
Summary: A new method based on differential photoacoustic cells and RG model is proposed for direct measurement of thermal effusivity in solids. Two identical photoacoustic cells are used, with one acting as the reference material and the other as the study material. By observing the changes in the photoacoustic pressure ratio graph, the thermal effusivity of the materials can be determined. The thermal effusivity of aluminum and copper were successfully determined as a proof of concept.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Composites
Liang Liang, Yu Feng, Kailun Yang, Zhanyi Wang, Zhonghua Zhang, Xuesong Chen, Qingguo Chen
Summary: In this research, a DC electric field was used to induce fillers in epoxy resin, resulting in an improved thermal conductivity of the composite at low loading condition. The structure of the composites was optimized and the thermal conductivity pathways were enhanced, leading to excellent thermal conductivity and insulating properties. This method is easy to apply and has great potential for high thermal conductivity electrical insulation applications such as large generators.
POLYMER COMPOSITES
(2023)
Article
Engineering, Environmental
Dong Wang, Shangyang Ren, Jiaoyang Chen, Yukun Li, Zhifeng Wang, Jianhua Xu, Xu Jia, Jiajun Fu
Summary: This study introduces a high thermal conductive polymer composite synthesized by implanting hy-BNNSs into SM. The composite exhibits ultrahigh in-plane thermal conductivity, superior mechanical properties, humidity stability, and deformation recovery ability at 70 degrees Celsius. It can restore mechanical properties, heat dissipation properties, and dielectric properties, making it an ideal candidate for thermal management in flexible electronic devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Composites
Houbao Liu, Renli Fu, Xinqing Su, Binyong Wu, He Wang, Yue Xu, Xuhai Liu
Summary: This study presents a layer-by-layer spin coating process to prepare multilayer films with ordered alternate structures; the combination of MXene and PDMS provides effective EMI shielding, while BN and PDMS offer efficient heat dissipation. The EMI SE of the multilayer films increases with the number of layers, but an increase in layers results in decreased thermal conductivity and electrical insulation performance.
COMPOSITES COMMUNICATIONS
(2021)
Article
Polymer Science
Sijiao Wang, Mengmeng Chen, Kaiming Cao
Summary: Thermoplastic polyolefins, like polyethylene, are widely used in the electric industry, and researchers are interested in their nanocomposites. By preparing a low-density polyethylene composite with aligned aluminum oxide fiber in an electric field, a novel composite with excellent properties is demonstrated. The aligned fiber helps prevent charge accumulation and reduces the amount of free electrons in the material, and also enhances the thermal conductivity of the composite.
Article
Mechanics
Hao Lin, Meng Ma, Qindan Chu, Lin Xu, Si Chen, Yanqin Shi, Huiwen He, Xu Wang
Summary: In this study, a series of multifunctional polymer composite films with high thermal conductivity, electrical insulation, and excellent antibacterial properties were prepared by using zinc oxide@reduced graphene oxide as fillers. The results showed that these composite films have an effectively constructed thermal conduction pathway, with high in-plane thermal conductivity. Additionally, the films retain their electrical insulation and exhibit excellent antibacterial properties, making them suitable for various thermal management systems.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Mohamed Bakr Mohamed, Ali Badawi
Summary: This work investigates the impact of preparation temperature on the structural, optical, and electronic characteristics of vanadium doped ZnS nanoparticles. The results show that the parameters related to lattice defects, such as lattice size and microstrain, change with increasing temperature. The optical properties exhibit a decrease in the optical band gap energy and a blue shift in emitted colors with temperature. The electronic characteristics show that ZnS is a semiconductor, while doped samples exhibit half metallic or metallic characteristics.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Multidisciplinary Sciences
Sami S. Alharthi, M. G. Althobaiti, Ali A. Alkathiri, Essam E. Ali, Ali Badawi
Summary: The functional properties of PVP/PVA blend incorporated with non-stoichiometric SnS have been explored, showing improved structure, optical properties, and emission spectra in the visible region.
JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2022)
Article
Physics, Multidisciplinary
Abdelazim M. Mebed, Muhammad Mushtaq, Iltaf Muhammad, Ikram Un Nabi Lone, Samah AL-Qaisi, Norah Algethami, E. F. EL-Shamy, Amel Laref, N. M. AL-Hosiny
Summary: In this study, the geometric features, electronic structure, and magnetism of two new double perovskites were investigated. The results showed stable magnetic and half-metallic properties for these materials, with potential applications in spintronics.
Article
Materials Science, Multidisciplinary
Ali Badawi, Sami S. Alharthi
Summary: This study aims to enhance the optical and electrical performance of PVA/MWCNTs blend by doping with Cu/ZnS nanoparticles, for flexible eco-friendly applications. Undoped and Cu/ZnS doped MWCNTs/PVA polymeric nanocomposite films were fabricated. The structure and optical characteristics were analyzed using FT-IR and UV-visible-NIR spectrophotometry. The electrical properties were studied as a function of temperature. The results show that doping with Cu/ZnS improves the optical and electrical properties of MWCNTs/PVA blend.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ali Badawi, Sami S. Alharthi, Abdullah A. Alotaibi, M. G. Althobaiti
Summary: In this study, the structural and optical characteristics of hematite were modified by doping Ba and Al for photocatalytic and eco-friendly applications. The doped and undoped hematite nanostructures were synthesized onto quartz substrates. Surface morphology, vibrational bands, and structural properties were examined using FE-SEM, FT-IR, and XRD measurements. The doped hematite samples showed improved crystallite size, optical absorption, and refractive index compared to the undoped sample. These results suggest that Ba, Al, and Ba/Al dual doped hematite nanoparticles have potential applications in photocatalysis and eco-friendly devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
M. G. Althobaiti, Abdullah A. Alotaibi, Sami S. Alharthi, Ali Badawi
Summary: The structural, linear/nonlinear optical and dielectric properties of Cu0.9Co0.1-xSnxO (CCTO) nanostructured films were investigated. Different compositions of CCTO films were prepared by spray pyrolysis. The films exhibited variations in structure, crystallography, and morphology. The UV-Vis. NIR measurements revealed that the films had high absorption coefficients and energy band gaps ranging from 1.24 to 1.14 eV. The linear optical properties of CCTO were influenced by the composition. The study suggests that CCTO nanostructured films have potential applications in photocatalysis, solar cells, optoelectronics, and ultra-fast optical switching devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Polymer Science
Sami S. Alharthi, Ali Badawi
Summary: The solution casting technique was used to prepare blank and CuO-doped polyvinyl alcohol/chitosan (PVA/CS) blends for eco-friendly applications. The structure and surface morphologies of the samples were characterized by Fourier transform infrared (FT-IR) spectrophotometry and scanning electron microscopy (SEM), respectively. FT-IR analysis confirmed the incorporation of CuO particles in the PVA/CS structure, while SEM analysis showed a well-dispersed distribution of CuO particles. The optical properties of the CuO-doped PVA/CS films were improved, as indicated by the decrease in transmittance and optical bandgap.
Article
Materials Science, Multidisciplinary
M. A. M. Uosif, Shams A. M. Issa, Antoaneta Ene, A. M. A. Mostafa, Ali Atta, Ali Badawi, E. F. El Agammy, Hesham M. H. Zakaly
Summary: The TVS5 sample in the 65TeO(2)-(35-x)V2O5-xSm(2)O(3) glass composition was found to have the highest G(MAC) and lowest G(HVL) and G(MFP), suggesting its potential use in radiation shielding activities to enhance nuclear safety.
FRONTIERS IN MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, Ahmed R. Wassel, Hassan Elshimy, Essam E. Ali, Ali Badawi, Mohamed Bakr Mohamed
Summary: PbS1-xOx (x = 0, 0.05, 0.1, 0.15, 0.2) samples were prepared via the solid-state reaction method and analyzed using various techniques such as Rietveld refinement, energy-dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FESEM), Fourier-transform infrared spectroscopy (FTIR), UV diffused reflectance technique, and photoluminescence measurements. The results showed that the diffusion of oxygen ions at Wyckoff position 4b increased and sulfur decreased in the PbS1-xOx samples. The effect of sulfur deficiency on the optical parameters and the origin of different emitted colors were also investigated.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Polymer Science
M. G. Althobaiti, Ali Badawi
Summary: Cu/ZnO (ZCO) nanoparticles (NPs) were doped into PVA/PVP/graphene composites to enhance their linear/non-linear optical and dielectric performance for optoelectronic applications. The synthesized ZCO NPs and ZCO PNCs showed a wurtzite structure, with ZCO NPs integrating with the host blend's structure. Optical analysis revealed a decrease in the band gap and an increase in refractive index, as well as a significant enhancement in non-linear optical constants through ZCO doping. These achievements make PVA/PVP/graphene blend by ZCO doping a promising candidate for improving optical devices.
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS
(2023)
Correction
Engineering, Electrical & Electronic
Zein K. Heiba, Mohamed Bakr Mohamed, Ah. Abd Ellatief, A. M. El-naggar, Ali Badawi
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Ceramics
Zein K. Heiba, Mohamed Bakr Mohamed, M. Abdellatief, Hassan Elshimy, Essam E. Ali, Ali Badawi
Summary: ZnO/(1-x)Co3O4/xNiO/(x = 0.0, 0.3, 0.5, 0.7, 0.9 and 1) samples were prepared using co-precipitation method. Rietveld analysis, XPS and FTIR techniques were used to investigate the phases, structures, microstructures, and ion exchanges in the system. TEM microscopy showed homogeneous spherical particles with nano size. Diffuse reflectance measurements revealed high absorbance in the visible region for samples with x = 0, 0.7, and 1.0, which could be used in coating eyeglasses to protect the skin around the eyes. The optical band gap and refractive index behaviors were influenced by the oxide composition, and the effect of alloying on optical parameters was explored.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Sami S. Alharthi, Ali Badawi
Summary: With the unique physicochemical properties, polymeric nanocomposites (PNCs) have played a remarkable role in flexible optoelectronic applications. By using a solution casting procedure, Ag1.6Cu0.2S (ACS) nanoparticles were successfully incorporated into PVP/PVA blend. The influence of ACS on the structure and morphology of PVP/PVA was investigated, and it was found that ACS doping led to enhancements in the optical properties and nonlinear effects of PVP/PVA. The electrical performance of ACS PNCs was also greatly enhanced. These findings demonstrate that ACS PNCs can be efficiently used in various optoelectronic applications.
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Zein K. Heiba, M. A. Ahmed, M. Hassan, Ali Badawi, A. M. El-naggar, Mohamed Bakr Mohamed
Summary: In this study, an effective Ag2CO3/CeO2 p-n junction was developed for the photocatalytic reduction of a model cationic pollutant, rhodamine B dye. The Ag2CO3/CeO2 heterojunction was formed through sol-gel and sonochemical routes, with silver carbonate successfully distributed on localized active sites. The physicochemical features of the solid specimen were analyzed through various experimental methods. The results showed that the p-n junction exhibited enhanced photocatalytic activity for the decomposition of the dye compared to pristine CeO2 nanoparticles.
Article
Materials Science, Multidisciplinary
Ali Badawi, M. G. Althobaiti, Abdullah A. Alotaibi, Essam E. Ali, Sami S. Alharthi
Summary: The structure and optical properties of Fe2O3 nanoparticles films were studied for environmentally friendly applications. The effects of La/Mg co-doping on the properties were explored. The ability to tailor the linear/nonlinear optical properties of the films makes them promising for various environmentally friendly applications.
