Results 151 to 160 of about 72,590 (284)
In the present investigation, influence of the synthesis conditions on the morphology, phase purity and physical properties of the magnetite (Fe3O4) nanosized particles obtained from only ferrous salt solutions were investigated.
Šutka, Andris +3 more
core
steel research international, EarlyView.The effects of finishing rolling temperature, coiling temperature, and annealing on scale formation and pickling performance are studied. Scale morphology and composition are studied via SEM‐EDS, and pickling performance is studied by evaluating scale residues and mass losses during pickling.
Roosa Kähkönen +5 more
wiley +1 more source
Thermodynamics and Kinetics of Ammonia‐Based Reduction of Natural Hematite
steel research international, EarlyView.Ammonia is investigated as a carbon‐free hydrogen carrier for reducing natural hematite into metallic iron. Higher temperature and smaller particle size promote faster reduction, while ammonia dissociation generates hydrogen that indirectly drives the reduction reaction. At 850 °C, high reduction degrees and porous metallic iron structures are achieved,
Medard Turyasingura +4 more
wiley +1 more source
X-Ray Spectrometry, EarlyView.ABSTRACT Crystalline quartz, the most common crystalline silica polymorph, is widely found in industrial products. It is of high regulatory relevance, because its fine fraction, a form of respirable crystalline silica, is classified as an occupational carcinogen, with product‐content thresholds (e.g., 0.1% (w/w) in the European Union) and stringent ...
Giacomo Siviero +3 more
wiley +1 more source
Precipitation Synthesis of Magnetite Fe3O4 Nanoflakes
Precipitation can be applied to synthesize magnetite Fe3O4 nanoflakes in an ambient air atmosphere without using any surfactant, templates or special equipment.
Šutka, Andris +4 more
core
Archaeometry, EarlyView.ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello +5 more
wiley +1 more source
Talc‐Tempered Pottery From Bala Hissar, Kabul: An Analytical Study
Archaeometry, EarlyView.ABSTRACT Potsherds of cooking ware excavated at Bala Hissar archaeological site in Kabul were studied using X‐ray fluorescence (XRF), scanning electron microscope‐energy dispersive X‐ray spectrometry (SEM‐EDS), Raman spectroscopy, X‐ray powder diffraction (XRPD), thermogravimetric analysis (TGA) and optical microscopy.
Parviz Holakooei +4 more
wiley +1 more source
Archaeometry, EarlyView.ABSTRACT This paper examines the interaction of two ware traditions in the Maridíaz mortuary assemblage (Pasto, Nariño, Colombia), a rare, well‐documented cemetery context in which Piartal, Tuza, and hybrid vessels co‐occur. Using portable X‐ray fluorescence (n = 39) and 3D geometric morphometrics (n = 25), we find shared ceramic compositions ...
Catherine Klesner +4 more
wiley +1 more source
Quantification of Partial Oxidation of Magnetite to Maghemite in Aqueous Solution Using XRD. [PDF]
ACS OmegaDesmau M +4 more
europepmc +1 more source
Cladistics, EarlyView.Abstract Targeted enrichment of ultraconserved elements (UCEs) is a powerful tool for resolving phylogeny in groups with limited morphological or molecular data. Here, we use UCEs to reconstruct the first comprehensive phylogeny of the chiton superfamily Cryptoplacoidea, including museum material up to 133 years old.
Katarzyna Vončina +4 more
wiley +1 more source