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- W255454994 abstract "Products formed on the carbon electrode in the spectrum analysis of niobium were radiographically investigated. Samples investigated were: Nb + C, Si + C, Nb + Si + C, Nb/sub 2/O/sub 5/ + C, Nb/sub 2/O//sub 5/+ Si + C, and Nb/ sub 2/O/s ub 5/ + SiO/sub 2/ + C. The radiographic investigation shows that in the interaction of metallic niobium with carbon, niobium carbide is formed. ln the interaction between silicon and carbon, SiC is formed. The interaction between carbon and a mixture of Nb and Si is complex, and phases such as cubic NbC and tetragonal BETA -Nb/sub 5/Si/sub 3/ were identified. The interaction of Nb/sub 2/O/sub 5/ with the carbon electrode shows only a modification of Nb/sub 2/ O/sub 5/ with small impurities of NbO/sub 2/. Lower niobium oxides were not determined. ln the interaction between niobium pentoxide Nb/sub 2/O/sub 5/ and elementary silicon with carbon NbO/sub 2/ and a phase difficultly identified are formed. The interaction between niobium pentoxide Nb/sub 2/O/sub 5/ and silicon dioxide with carbon leads to thc formation of NbO/sub 2/ and niobium pentoxide. In the presence of elementary silicon and SiO/sub 2/ niobium dioxide is formed on the carbon crater duringmore » the spectroscopic determination of niobium. (auth)« less" @default.
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- W255454994 date "1958-01-01" @default.
- W255454994 modified "2023-09-27" @default.
- W255454994 title "THE RADIOGRAPHIC INVESTIGATION OF THE PRODUCTS OF CHEMICAL REACTIONS IN SPECTROSCOPIC DETERMINATIONS OF NIOBIUM" @default.
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