Results 31 to 40 of about 8,922 (227)

Microwave Synthesis of CaTiO3 Nanoparticles by the Sol-Gel Method

Конденсированные среды и межфазные границы, 2020
A technique for the microwave-activated synthesis of calcium titanate nanopowder was proposed. The microwave effect used in the synthesis of CaTiO3 samples when using sodium carbonate as a precipitant allowed obtaining a chemically homogeneous nanopowder
Victor F. Kostryukov, Anastasia E. Igonina   +1 more
doaj   +1 more source

Modification of concrete by hydrothermal nanosilica [PDF]

Нанотехнологии в строительстве, 2019
The paper shows the possibility to use hydrothermal nanosilica as a modifying additive to increase the strength of concrete based on portland cement.
Vadim V. Potapov, Yuriy V. Efimenko,, Denis S. Gorev,   +2 more
doaj   +1 more source

Structural and biodegradable properties of hydroxyapatite-SiO₂ reinforced MgO bioceramics by dual plasma electrolytic oxidation

Scientific Reports
In the present work, hydroxyapatite (HA) and silicon dioxide (SiO2) were in-situ synthesized in a MgO bioceramic on AZ31 via sequential dual plasma electrolytic oxidation (PEO).
Fariba Momeni, Mohammad Reza Rahimipour, Seyed Mohammad Mousavi Khoei, Asiyeh Habibi   +3 more
doaj   +1 more source

Effect of bismuth ion substitution on structural properties of zinc ferrite nanoparticles [PDF]

Processing and Application of Ceramics, 2016
Bismuth doped nano zinc ferrite particles having the general formula ZnFe2-xBixO4 (x = 0.00, 0.05, 0.10, 0.15, 0.20 and 0.25) were synthesized by sol-gel combustion method. The effect of bismuth doping on structural properties were investigated.
Naraavula Suresh Kumar, Katrapally Vijaya Kumar   +1 more
doaj   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Analysis of Iron Oxide Reduction Kinetics in the Nanometric Scale Using Hydrogen

Nanomaterials, 2020
Iron nanopowder could be used as a sintering aid to water-atomised steel powder to improve the sintered density of metallurgical (PM) compacts. For the sintering process to be efficient, the inevitable surface oxide on the nanopowder must be reduced at ...
Swathi K. Manchili, Johan Wendel, Eduard Hryha, Lars Nyborg   +3 more
doaj   +1 more source

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

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

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