نتایج جستجو برای: chromite
تعداد نتایج: 697 فیلتر نتایج به سال:
in this study, copper chromite (cucr2o4) nanoparticles was prepared by inverse co-precipitation method. in this method, cupric nitrate trihydrate, (cu (no3)2.3h2o) and chromium nitrate nonahydrate, (cr (no3) 3.9h2o) with a mole ratio of 1:2 were used. characterization of cucr2o4 nanoparticles was performed by fourier transform infrared spectroscopy (ft-ir), raman spectroscopy, x-ray diffraction...
The optical properties of coatings pigmented with different black colorants were systematically investigated and their surface temperatures and cooling energy savings were estimated. The black coatings pigmented with chromite iron nickel black and manganese ferrite black spinel colorants are not cool enough to be energy efficient cool black coatings. The cool black coatings pigmented with NIR-t...
Petrology and Mineral Compositions: The fresh, pale gray interior of this specimen has multiple shock fractures (with very minor calcite coatings) and some thin glass veinlets (Figure 2). This rock is a poikiloblastic recrystallized breccia, with larger grains of plagioclase (~70%) enclosing much smaller grains (less than 100 microns across) of pyroxene (~20%), olivine (~10%) and accessory Ti-c...
Chromite is a strategic mineral resource for many countries, and chromite deposit occurrences are widespread in the ultramafic rocks of Yarlung Zangbo ophiolite belt, particularly harzburgite unit mantle section. Conducting field surveys complex poorly accessible terrain challenging, expensive, time-consuming. Remote sensing an advanced method achieving modern geological work powerful technical...
Spectrophotometrlc and voltaanetric methods were developed for the analysis of potassium ferrate(VI) in dilute solutions, where the standard chromite method is inapplicable. A direct proportionality prevails between the ferrate concentration and the absorbance on the one hand, And the ferrate concentration and the ferrate reduction current on the other. However, voltaasetry has greater precisio...
EXTRATERRESTRIAL CHROMITE GRAINS FROM SWEDEN AND CHINA: DEBRIS OF THE L CHONDRITE PARENT ASTEROID BREAKUP P. R. Heck, T. Ushikubo, B. Schmitz, N. T. Kita, M. J. Spicuzza and J. W. Valley, Wisc-SIMS, Department of Geology and Geophysics, University of Wisconsin, 1215 W. Dayton St., Madison, WI 53706, USA, [email protected], Department of Geology, University of Lund, Sölvegatan 12, SE-22362 Lund, ...
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