Results 31 to 40 of about 5,258 (197)

ZnTiO3 ceramic nanopowder microstructure changes during compaction [PDF]

Science of Sintering, 2013
ZnTiO3 nanopowder as a constitutive component in compact production was primarily characterized. Scanning electron micrographs of as received powder were recorded.
Labus N., Krstić J., Marković S., Vasiljević-Radović D., Nikolić M.V., Pavlović V.   +5 more
doaj   +1 more source

The Influence of Al Doping on the Optical Characteristics of ZnO Nanopowders Obtained by the Low-Cost Sol-Gel Method

Chemistry, 2022
In this work, the influence of Al (0, 2, 4, and 6 wt.%) on the optical properties of ZnO has been briefly investigated and described. The undoped and doped samples were characterized using a UV-visible spectrophotometer and Photoluminescence (PL).
Pooja Nag Mishra, Pankaj Kumar Mishra, Dinesh Pathak   +2 more
doaj   +1 more source

Impact of MgO Additions on the Oxidation Resistance and Compression Behavior of Vanadium Alloys

Advanced Engineering Materials, EarlyView.
An increase in oxidation resistance at 600 °C is achieved for alloys containing more than 2.5 wt.% MgO. It has been established that, along with V2O5, MgO6V2, and Mg2O7V2 are formed, which are presumed to enhance oxidative stability. Furthermore, the possible transformation of Mg‐vanadates through reaction with CO2, which presumably occurs in this ...
Ievgen Solodkyi, Mathias Galetz, Georg Hasemann, Fabian Lanoy, Emma White, Manja Krüger   +5 more
wiley   +1 more source

Phase Composition and Magnetic Properties of Nanoparticles with Magnetite–Maghemite Structure

Ceramics, 2023
Precipitation of nanopowders with mixed magnetite–maghemite composition was carried out under different conditions and with different separation techniques. The exact character of interactions of different iron oxide phases in the nanopowder was the main
Sergey I. Andronenko, Anton M. Nikolaev, Stanislav M. Suharzhevsky, Alexander A. Sinelnikov, Anastasia S. Kovalenko, Alexandra G. Ivanova, Olga A. Shilova   +6 more
doaj   +1 more source

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

Advanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje, Wilson Henao, Tania Rodenas, Patricia Concepción, Virginia Pérez Dieste, Alexander Missyul, Giovanni Agostini, Gonzalo Prieto   +7 more
wiley   +1 more source

Sintering of nanopowder based on an ordered phase with a perovskite-type LaLuO3:Yb3+ structure [PDF]

Processing and Application of Ceramics
The present work developed a methodology for synthesising single-phase nanopowder based on an ordered phase with LaLuO3 perovskite type structure. The LaLuO3:Yb3+ nanopowder, doped with 2 mol% Yb3+, was synthesised by wet-chemical method from precursor ...
Korniienko Oksana, Ragulya Andrii, Yurchenko Yuriy, Zamula Maryna, Shyrokov Oleksandr, Tomila Tamara, Lobunets Tatiana, Kolesnichenko Valeriy   +7 more
doaj   +1 more source

Transient Charging of Mixed Ionic‐Electronic Conductors by Anomalous Diffusion

Advanced Materials, EarlyView.
This article explores charge transport in mixed ionic‐electronic conductors (MIECs) through electrochemical impedance spectroscopy and transient current analysis. Focusing on PEDOT:PSS, WO3, and n‐doped PBDF, it uncovers the impact of anomalous diffusion via fractional modeling. The study reveals key correlations that deepen understanding and guide the
Heyi Zhang, Gonzalo Rivera‐Sierra, Shirin Siahjani‐Gultekin, Jenifer Rubio‐Magnieto, Anis Allagui, Ignacio Sanjuán, David Franco, Antonio Guerrero, Enrique H. Balaguera, Juan Bisquert   +9 more
wiley   +1 more source

Infrared study of nonstoichiometric anatase TiO2 nanopowders [PDF]

Science of Sintering, 2006
The infrared (IR) reflectivity of laser synthesized TiO2 nanopowder in the anatase phase with a small deviation from stoichiometry is reported. The samples were characterized by SEM, XRD and BET measurements as well as Raman and photoluminescence ...
Grujić-Brojčin M., Šćepanović M., Dohčević-Mitrović Z., Popović Z.V.   +3 more
doaj   +1 more source

Rotating Fluorescent Nanodiamond Assemblies With Focused Laguerre–Gaussian Beams

Advanced Optical Materials, EarlyView.
Self‐assembled fluorescent nanodiamond clusters are optically trapped and driven into controlled two‐dimensional rotation with Laguerre–Gaussian beams. With localized optical excitation, optically detected magnetic resonance spectra are collected at defined points along the orbit in a uniform external magnetic field.
Adam Stewart, Anthony J. El‐Helou, Ying Zhu, David McGloin, David A. Simpson, Peter J. Reece   +5 more
wiley   +1 more source

Hydroxyapatite Nanopowders and Nanoceramics [PDF]

The 16th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM, 2020
Hydroxyapatite is mainly used in biomedical applications because of its very important property—bioactivity. [...]
Andreea-Gabriela Oporan, Rodica-Mariana Ion, Ana Alexandra Sorescu   +2 more
openaire   +2 more sources