Results 31 to 40 of about 614 (173)
Resumo Pós cerâmicos à base de CuCr2O4 foram preparados pelo método da reação de combustão em solução a partir da calcinação no intervalo de 500 a 1100 °C, tendo por finalidade a aplicação destes como pigmento cerâmico.
M. B. M. Coelho +7 more
doaj +1 more source
An interdisciplinary in situ study of jewelled reliquaries of the True Cross integrates gemmology and portable analytical techniques, revealing new evidence on the identification and symbolic role of peridots and other gemstones. ABSTRACT Jewelled crosses containing relics of the True Cross occupy a central position in the devotional, artistic and ...
Stefania Martiniello +2 more
wiley +1 more source
CORROSION OF BASIC REFRACTORIES IN COPPER METALLURGY
Knowledge of corrosion processes on the melt – solid boundary is very important for life time of refractories and for refractory using design. The aim of this study was to realize and evaluate laboratory corrosion tests of three types basic refractories ...
Pavol Vadasz, David Medved
doaj +1 more source
Fabrication and characterization of MXene/CuCr2O4 nanocomposite for diverse energy applications
This work comprises facile synthesis of MXene/CuCr2O4 nanocomposite using co-precipitation method for studying unique and significant energy storage properties by triggering world to design and fabricate nano-electrode material with maximized specific ...
Rubia Shafique +8 more
doaj +1 more source
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 +7 more
wiley +1 more source
Beach Gold and Heavy Mineral Concentrates on Tiwai Spit Gravel Strand Plain, Southland, New Zealand
The Holocene Tiwai Spit on Foveaux Strait is a 12 km by 2 km gravel‐dominated strand plain, ∼10 m above present sea level. Gravel clasts are dominated by well‐rounded quartz cobbles, pebbles and granules derived from Otago Schist 200 km to the north in evolving river drainage systems during late Cenozoic.
Marshall Palmer, Dave Craw
wiley +1 more source
The identification of minerals is crucial for optimizing economic and environmental strategies worldwide. This study presents a novel approach to mineral identification and characterization using microwave sensing technology.
Madan Kumar Sharma +5 more
doaj +1 more source
Abstract Investigations of the venusian surface suggest chemical alteration (weathering) of rocks in contact with a hot, high‐pressure atmosphere. This alteration was anticipated based on mineral stability considerations and has been supported by laboratory experiments conducted under Venus surface conditions.
Alison R. Santos +5 more
wiley +1 more source
Bismuth-nickel mineralization in chromitites of Mariinskii deposit (Urals emerald mines)
The unusual Bi-Ni mineralization, represented by parkerite, millerite, bismutohauchecornite, bismuthinite, nickeline and, possibly nickel analogue of smythite (?), found in the metasomatically altered chromite rocks of the Mariinsky emerald-beryllium ...
Mikhail P. Popov +2 more
doaj +2 more sources
Copper chromites are well known as burning rate catalysts for the combustion of composite solid propellants, used as a source of energy for rocket propulsion.
Eunice Aparecida Campos +5 more
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