نتایج جستجو برای: chromia
تعداد نتایج: 159 فیلتر نتایج به سال:
A new organic-inorganic hybrid salt of cyclohexylammonium hexaisothiocyanatochromate(III) sesquihydrate, (C6H11NH3)3[Cr(NCS)6] ⋅ 3/2H2O, was synthesized at room-temperature by metathesis and ligand addition for the establishment energy-saving chemical synthesis approach. The formation this confirmed FT-IR, UV-Vis spectrophotometry, elemental microanalysis, single-crystal X-ray diffraction. TGA ...
Steel interconnect robustness under SOFC conditions for extended operation remains a challenge. The observation and analysis of the microstructure aged in real long periods provides data to help understand degradation potentially design accelerated testing.In this study, TEM observations cross section interconnects (9000h 20000h stacks) are presented. Crofer22APU with air side coated manganese ...
Although its value varies with the microstructure, hysteresis always accompanies hydride formation and decomposition in Pd(pure)-H, e.g., it is present even in nano-crystalline and thin films. Internal oxidation of Pd0.93Cr0.07 alloys leads to a pure Pd matrix containing nano-crystalline chromia precipitates. The characteristic hysteresis of Pd-H almost disappears in this form of Pd. The reason...
The molecular structures, oxidation states, and reactivity of 3 and 6% CrO3/ZrO2 catalysts prepared by incipient wetness impregnation were examined under different conditions. The in situ Raman spectroscopic studies under dehydrated conditions reveal that the 3 and 6% CrO3/ZrO2 catalysts possess equal amounts of monochromate and polychromate species. Consequently, monolayer coverage on this ZrO...
The bare and pre-oxidized AISI 430 pieces were screen printed by copper ferrite spinel coatings. Good bonding between the coating and the substrate was achieved by the reactive sintering process of the reduced coating. The energy dispersive X-ray spectroscopy (EDS) analysis revealed that the scale is a double layer consisting of a chromia-rich subscale and an outer Cu/Fe-rich spinel. The result...
The bare and pre-oxidized AISI 430 pieces were screen printed by copper ferrite spinel coatings. Good bonding between the coating and the substrate was achieved by the reactive sintering process of the reduced coating. The energy dispersive X-ray spectroscopy (EDS) analysis revealed that the scale is a double layer consisting of a chromia-rich subscale and an outer Cu/Fe-rich spinel. The result...
Increasing demands for cement, iron and steel industries for refractories with suitable workability in severe conditions (without any environmental risks), make the refractories’ researches to be an active area. Refractories containing Spinel has been developed with addition of chromia as a substitute in refractories using Magnesite - chromite. In this research, different amounts of Cr2O3 were ...
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