Results 11 to 20 of about 30,035 (254)
New insights into the dust formation of oxygen-rich AGB stars [PDF]
, 2013 We observed the AGB stars S Ori, GX Mon and R Cnc with the MIDI instrument at the VLTI. We compared the data to radiative transfer models of the dust shells, where the central stellar intensity profiles were described by dust-free dynamic model ...
Boboltz, D. A. +5 more
core +2 more sources
Speciation of selected trace and major elements in lignite used in "Nikola Tesla A" power plant (Obrenovac, Serbia) [PDF]
Journal of the Serbian Chemical Society, 2005 Four samples of milled lignite used in the "Nikola Tesla A" power plant located in Obrenovac near Belgrade, were subjected to a five-step sequential extraction, comprising of the following phases: distilled water, 1M ammonium acetate, 0.2M ammonium ...
Popović Aleksandar R. +1 more
doaj +3 more sources
Experimental study of lead (II) removal using polymorphous silica adsorbents [PDF]
International Journal of Mining and Geo-Engineering, 2019 Adsorption of lead(II) as a major heavy metal pollutant onto nano-adsorbents of Andalusite, Kyanite and Sillimanite was studied in a batch system.
Saleh Nosrati +2 more
doaj +1 more source
Synthesis of porous silicates [PDF]
, 1995 The issues of importance and future concern in the synthesis of porous silicates and porous materials that contain a large fraction of silica, e.g. zeolites and other crystalline molecular sieves, are reviewed. The thermodynamics of zeolite synthesis are
Davis, M. E., Helmkamp, M. M.
core +1 more source
Molecules, 2023 This paper reports the synthesis and structural analysis of mesoporous silica materials with the use of aluminum phyllosilicate clay (bentonite) as an alternative silica source.
Malgorzata Zienkiewicz-Strzalka +4 more
doaj +1 more source
Hydrometallurgical extraction of Al and Si from kaolinitic clays [PDF]
, 2017 Herein is presented the results of a study on the hydrometallurgic extractionand recovery of aluminum and silicon by leaching of kaolinitic clays with HF. Thestudied extraction parameters were: temperature, reaction time, solid/liquid ratio,concentration,
Pinna, Eliana Guadalupe +3 more
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Ядерна фізика та енергетика, 2019 Using the X-ray diffraction method, the phase content of brown ceramics of lava-like fuel-containing materials of the “New Safe Confinement – Shelter Object” Complex was investigated.
S. V. Gabielkov +6 more
doaj +1 more source
Reviews on Advanced Materials Science, 2020 The present review paper focuses on the current state of the art of the alumina-silicate ceramics and surface modifications of ceramics dedicated as fillers in composites with carbon fiber. The use of aluminum-silicates in the form of a cenosphere due to
Nakonieczny Damian S. +2 more
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On the plasticity of Si-O framawork of alkali zinc silicates [PDF]
, 1997 The configuration of the Si-O framework in alkali zinc silicates has been investigated on the basis of recently determined structures. The results have shown that there is a linear correlation between the ionic radii of alkali ions and the molar ...
Kawahara, Akira, Kohara, Shizuo
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Metals, 2017 A novel technique was developed for the recovery of lithium and aluminum from coal fly ash using a combination of pre-desilication and an intensified acid leaching process. The main components of the high-aluminum fly ash were found to be Al2O3 and SiO2,
Shenyong Li +5 more
doaj +1 more source