A5064497124- Magnetic properties of thin films
- Magnetic Properties of Alloys
- Metallic Glasses and Amorphous Alloys
- Rare-earth and actinide compounds
- Electrocatalysts for Energy Conversion
- Magnetic and transport properties of perovskites and related materials
- Transition Metal Oxide Nanomaterials
- Geotechnical Engineering and Soil Mechanics
- Advanced battery technologies research
- Geotechnical Engineering and Soil Stabilization
- Advanced Photocatalysis Techniques
- Magnetic Properties and Applications
- Advancements in Battery Materials
- Geotechnical Engineering and Underground Structures
- Dielectric materials and actuators
- Luminescence Properties of Advanced Materials
- nanoparticles nucleation surface interactions
- Luminescence and Fluorescent Materials
- Geomagnetism and Paleomagnetism Studies
- Microwave Dielectric Ceramics Synthesis
- Gas Sensing Nanomaterials and Sensors
- Iron oxide chemistry and applications
- Fuel Cells and Related Materials
- Microstructure and mechanical properties
- Ferroelectric and Piezoelectric Materials
University of Alberta
2023
The University of Texas at Arlington
2009-2019
Ningbo Institute of Industrial Technology
2015-2019
Chinese Academy of Sciences
2018-2019
Ames National Laboratory
2011-2016
United States Department of Energy
2016
Iowa State University
2016
Institute of Physics
2015
State Key Laboratory of Magnetism
2015
University of Maryland, College Park
2011
This study reports on the solution combustion synthesis of two different ternary niobium oxides, namely, p-CuNb2O6 and n-ZnNb2O6. Such oxides are attractive candidates in "Holy Grail" search for efficient stable semiconductors solar energy conversion environmental remediation. We demonstrate how this time- energy-efficient method is capable synthesizing high surface area crystalline nanoparticles above compounds with enhanced optoelectronic properties. The synthesized samples were...
We report magnetic properties and microstructure of high energy-product MnBi bulk magnets fabricated by low-temperature ball-milling warm compaction technique. A maximum energy product (BH)max 8.4 MGOe a coercivity 6.2 kOe were obtained in the magnet at room temperature. Magnetic characterization elevated temperatures showed an increase to 16.2 while value decreased 6.8 400 K. Microstructure revealed that consist oriented uniform nanoscale grains with average size about 50 nm.
It is of great importance to choose a suitable solvent for the growth high-quality CsPbBr 3 single crystals. Here, by introducing acetonitrile (ACN) mixture dimethyl sulfoxide (DMSO)...
Copper halide perovskite materials have been studied extensively for use in radiation detection recent years because of their excellent properties. However, there are few researches on copper bromide perovskite...
Abstract In the search for stable and efficient photocatalysts beyond TiO 2 , tungsten‐based oxide semiconductors silver tungstate (Ag WO 4 ), copper (CuWO zinc (ZnWO ) were prepared using solution combustion synthesis (SCS). The tungsten precursor’s influence on product was of particular relevance to this study, most significant effects are highlighted. Each sample’s photocatalytic activity towards methyl orange degradation studied benchmarked against their respective commercial sample...
Atomic interdiffusion between FePt and Fe3O4 nanoparticles in annealed FePt-based nanocomposite magnets has been studied by means of structural magnetic characterizations. The results show that the Fe3Pt phase is formed during annealing only when mass ratio x Fe3O4/FePt larger than 1/20. When ≤ 1/20, single formed. It interesting to find coercivity samples increases with a small addition before formation phase. This hardening behaviour indicates composition can be further adjusted via post...
Structural and magnetic properties of the FexPt100−x (x=78–88) alloys have been investigated. It is found that for all investigated compositions, a phase transition occurs from disordered γ to ordered α during cooling, while reverse process takes place heating. Moreover, fields also induce near temperature. The temperature- magnetic-field-induced transitions give rise huge negative thermal expansion thus giant entropy change (up 39.8J∕kgK alloy with x=79). contribution field induced total...
Hard magnetic Sm2Fe17Nx nanoflakes were prepared by surfactant assisted ball milling (SABM) at low temperature using liquid nitrogen cooling (surfactant cryomilling). 2-methyl pentane was used as a medium and oleylamine surfactant. The morphology, structure, properties of investigated scanning electron microscopy, X-ray diffraction, vibrating sample magnetometer, respectively. By comparing produced SABM room temperature, we found that the former has many interesting features: more...
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We report high-temperature magnetic properties of hybrid nanocomposite magnets composed Sm <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> Co xmlns:xlink="http://www.w3.org/1999/xlink">17</sub> and Nd Fe xmlns:xlink="http://www.w3.org/1999/xlink">14</sub> B hard phases prepared via high-energy ball milling warm compaction. The structural the /Nd were investigated for different phase fractions two phases. effective interphase exchange...
The profiled heat treatment (PHT) method has been used to synthesize MnBi alloys with high-purity low-temperature phase (LTP). In the PHT method, arc-melted alloy was remelted then slowly cooled by a pseudo-equilibrium solidification process promote formation of LTP phase. PHT-treated had an up 94 wt.% and magnetization 73 emu/g under field 9 T. Scanning electron microscopy showed that there exist some micrometer-sized Mn-rich inclusions in matrix alloy. were crushed into powders average...
Rare-earth permanent magnetic nanoflakes and nanoparticles have drawn great attention due to their potential applications in fabricating magnets with high performance. In this work, the anisotropic PrCo5 were fabricated via surfactant-assisted ball milling at low temperature room temperature, morphology, microstructure, properties investigated systematically. It is found that, compared sample milled prepared a better crystallinity, stronger [001] out-of-plane texture, more regular shape...
We demonstrate a sharp composition transition at the interface of an as-deposited SmCo5/Fe bilayer, while annealing results in measurable Co/Fe interdiffusion near boundary. For annealed phase separation occurs within bcc-layer, forming regions with 3 different Fe:Co ratios. Depositing Fe between Sm-Co layers provides realistic model for bulk systems. was observed by TEM Sm2Co7/Fe/Sm2Co7 “sandwich” thin film, confirming as main mechanism controlling chemistry Sm-Co/Fe nanocomposites. The...
Rhombohedral nickel carbide (Ni3Cx, x=0.7, 1.2 and 1.5) nanoparticles (∼ 110 nm) with enhanced magnetic coercivity (HC up to 1.3 kOe) at temperature below the spin-glass freezing (Tf) have been demonstrated. The presence of state, which is seen ∼17 K, evident by field dependence following de Almeida–Thouless (AT) relationship frequency Tf. Moreover, state irreversible sweeping applied results in high HC 10 K. With increases carbon content, we found a gradual increasing trend saturation...
Abstract In this work, three different structures of lithium nickel oxide (LNO) synthesized by simple methods as inexpensive and efficient electrocatalyst for OER were presented. The catalytic activities LNO catalysts pseudo‐spinel (PS‐LiNiO 2 ) > disordered (DO‐LiNiO layered ( L ‐LiNiO oxide. Particularly, PS‐LiNiO demonstrated much lower tafel slope 62 mV dec −1 with the highest durability whereas exhibited higher 88 , respectively. To elucidate origin high catalysts, studied EXAFS...
Synthesis of nanoalloys containing three or more elements with controllable size and morphology desired phase is very challenging. Rare earth (RE)-transition metal (TM) have great potential applications, however, their synthesis even a daunting task. Here we find that the direct gas-phase ordering Sm-Co-based (around 5–15 nm) into 1:5 without shape change can be achieved by in-flight annealing through reducing crystallization-ordering temperature (COT) additive Cu Ni. The homogenous...
The electrolysis of water to form hydrogen and oxygen is a promising method store renewable energy. This requires electrodes that convert into protons, electrons, oxygen. We report multifunctional polymer conducts electrons ions may coreact with the electrocatalyst in evolution reaction (OER). were prepared two steps from off-the-shelf reagents. They operate low loadings abundant catalysts are among most active (100 mA cm–2 at 1.43 V vs RHE (1.41 V, iR-corrected)) stable electrodes, reported...
A series of samarium ferrites with controllable morphology was synthesized by a facile hydrothermal method. The microstructure, particle morphology, and magnetic properties the as-synthesized were characterized X-ray diffraction (XRD), scanning electron microscopy, transmission photoelectron spectroscopy, vibrating sample magnetometer. Effects different synthesis conditions (the addition method concentration potassium hydroxide during reaction) on analyzed. In addition, corresponding...