A5042907791- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Perovskite Materials and Applications
- Ferroelectric and Piezoelectric Materials
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- nanoparticles nucleation surface interactions
- Advanced materials and composites
- Machine Learning in Materials Science
- Advanced Condensed Matter Physics
- Advanced Thermoelectric Materials and Devices
- Nuclear materials and radiation effects
- Solidification and crystal growth phenomena
- Rheology and Fluid Dynamics Studies
- Advanced Thermodynamics and Statistical Mechanics
- Radioactive element chemistry and processing
- Material Dynamics and Properties
- Catalytic Processes in Materials Science
- Conducting polymers and applications
- Advanced Battery Technologies Research
- Injection Molding Process and Properties
- Luminescence Properties of Advanced Materials
- Dielectric properties of ceramics
Pennsylvania State University
2020-2025
British University in Egypt
2018-2021
Abstract High‐entropy materials defy historical design paradigms by leveraging chemical disorder to kinetically stabilize novel crystalline solid solutions comprised of many end‐members. Formulational diversity results in local crystal structures that are seldom found conventional and can strongly influence macroscopic physical properties. Thermodynamically prescribed flexibility provides a means tune such Additionally, kinetic metastability possible atomic arrangements, including both...
The prototype high-entropy oxide (HEO) Y0.2La0.2Ce0.2Pr0.2Sm0.2O2−δ represents a particularly complex class of HEOs with significant anion sublattice entropy. system takes either fluorite or bixbyite-type crystal structure, depending on synthesis kinetics and thermal history. Here, we synthesize bulk ceramics epitaxial thin films use diffraction to explore symmetry phase. Thin exhibit the high phase, while adopt lower bixbyite difference in chemical ordering observed between vapor-deposited...
This manuscript presents a working model linking chemical disorder and transport properties in correlated-electron perovskites with high-entropy formulations framework to actively design them. We demonstrate this new learning epitaxial Sr$x$(Ti,Cr,Nb,Mo,W)O$3$ thin films that exhibit exceptional crystalline fidelity despite diverse formulation where most B-site species are highly misfit respect valence radius. X-ray diffraction, photoelectron spectroscopy, transmission electron microscopy...
Abstract We report on the structure and dielectric properties of ternary A 6 B 2 O 17 (A = Zr; Nb, Ta) thin films ceramics. Thin are produced via sputter deposition from dense, phase‐homogenous bulk ceramic targets, which synthesized through a reactive sintering process at 1500°C. Crystal structure, microstructure, chemistry, characterized by X‐ray diffraction reflectivity, atomic force microscopy, photoelectron spectroscopy, capacitance analysis, respectively. observe relative...
Abstract Interest in high‐entropy inorganic compounds originates from their ability to stabilize cations and anions local environments that rarely occur at standard temperature pressure. This leads new crystalline phases many‐cation formulations with structures properties depart conventional trends. The highest‐entropy homogeneous random solid solution is a parent structure which continuum of lower‐entropy offspring can originate by adopting chemical and/or structural order. report...
The new hybrid potential of CsPbI<sub>3</sub>accurately reproduces the density, structure and phase transformation from orthorhombic to cubic crystal structure.
Interest in high-entropy inorganic compounds originates from their ability to stabilize cations and anions local environments that rarely occur at standard temperature pressure. This leads new crystalline phases many-cation formulations with structures properties depart conventional trends. The highest-entropy homogeneous random solid-solution is a parent structure which continuum of lower-entropy offspring can originate by adopting chemical and/or structural order. report demonstrates how...
We unravel the distinct roles each cation plays in phase evolution, stability, and properties within Mg1/5Co1/5Ni1/5Cu1/5Zn1/5O high-entropy oxide (HEO) by integrating experimental findings, thermodynamic analyses, first-principles predictions. Our approach is through sequentially removing one at a time from five-component to create five four-component derivatives. Bulk synthesis experiments indicate that Mg, Ni, Co act as rock salt stabilizers whereas only Mg Ni enthalpically enhance...
Abstract High entropy oxides (HEOs) have garnered much interest due to their available high degree of tunability. Here, we study the local structure (MgNiCuCoZn) 0.167 (MnCr) 0.083 O, a composition based on parent HEO 0.2 O. We synthesized series thin films via pulsed laser deposition at incremental oxygen partial pressures. X‐ray diffraction shows lattice parameters decrease with increased pO 2 pressures until onset phase separation. absorption fine that specific atomic species in dictate...
Since most plastics are not biodegradable, plastic recycling is the main part of global efforts to reduce in waste stream. Sorting imposes lots difficulties which can be avoided by introducing blends. This paper starts reviewing recent attempts study Accordingly, purpose this analyze experimental results and apply statistical measures using ANOVA effect increasing ratio that contains both polystyrene polypropylene on mechanical properties pure when injected at different temperatures. Cost...
We report on temperature-dependent dielectric behavior of disordered ternary A6B2O17 (A = Zr, Hf; B Nb, Ta)-form oxides in the GHz frequency range. The microwave properties including relative permittivity, loss, and permittivity were characterized using cylindrical resonators a resonant post measurement technique. Dielectric measurements through method approach generally agree with bulk ceramics measured standard techniques. Coefficients describing for phases are strongly positive,...
We report on the structure and dielectric properties of ternary A6B2O17 (A = Zr; B Nb, Ta) thin films ceramics. Thin are produced via sputter deposition from dense, phase-homogenous bulk ceramic targets, which synthesized through a reactive sintering process at 1500 {\deg}C. Crystal structure, microstructure, chemistry characterized by X-ray diffraction reflectivity, atomic force microscopy, photoelectron spectroscopy, capacitance analysis respectively. observe relative permittivities...
High entropy oxides (HEO)s have garnered much interest due to their available high degree of tunability. Here, we study the local structure (MgNiCuCoZn)0.167(MnCr)0.083O, a composition based on parent HEO (MgNiCuCoZn)0.2O.We synthesized series thin films via pulsed laser deposition at incremental oxygen partial pressures. X-ray diffraction shows lattice parameter decrease with increased pO2 pressures until onset phase separation. absorption fine that specific atomic species in dictate global...
High-entropy materials shift the traditional discovery paradigm to one that leverages disorder, enabling access unique chemistries unreachable through enthalpy alone. We present a self-consistent approach integrating computation and experiment understand explore single-phase rock salt high-entropy oxides. By leveraging machine-learning interatomic potential, we rapidly accurately map composition space using our two descriptors: bond length distribution mixing enthalpy. The stabilities for...
Rare-earth oxides (REOs) are an important class of materials owing to their unique properties, including high ionic conductivities, large dielectric constants, and elevated melting temperatures, making them relevant several technological applications such as catalysis, conduction, sensing. The ability predict these properties at moderate computational cost is essential guiding discovery optimizing performance. Although density-functional theory (DFT) the favored approach for predicting...
Lead-free halide perovskites are of great importance as prospective materials for efficient solar cells. Germanium is a very promising non-toxic alternative to lead. In this study, the crystal configuration, projected density states and band structure trigonal CsGeI <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> , yellow quenched black orthorhombic CsPbI cubic were investigated using functional theory with Perdew-Burke-Ernzerhof...
In this study, numerical simulations were utilized to model the optical performance of perovskite intermediate band solar cells with dispersed quantum dots. Two dots materials investigated: PbS and Ge. addition, three volumetric concentrations modeled analyzed. It was concluded that outperformed Additionally, as concentration QDs increased, absorption increased well.