Niobium oxide, archaically called columbium oxide,[1] may refer to:
Niobium monoxide (niobium(II) oxide), NbO
Niobium dioxide (niobium(IV) oxide), NbO2
Niobium pentoxide (niobium(V) oxide), Nb2O5
In addition to the above, other distinct oxides exist
general formula Nb3n+1O8n−2 where n ranges from 5 - 8 inclusive, e.g. Nb8O19 (Nb16O38).[2]
Nb12O29 and Nb47O116
Natural niobium oxide is sometimes known as niobia.
^Kamat, G. R.; Gupta, C. K. (Oct 1971). "Open aluminothermic reduction of columbium (Nb) pentoxide and purification of the reduced metal". Metallurgical Transactions. 2 (10): 2817–2823. doi:10.1007/BF02813257. ISSN 0026-086X.
^Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
Niobium is a chemical element; it has symbol Nb (formerly columbium, Cb) and atomic number 41. It is a light grey, crystalline, and ductile transition...
robust compound of niobium, many methods, both practical and esoteric, exist for its formation. The oxide for example, arises when niobium metal is oxidised...
metal or niobium monoxide, on which an insulating niobium pentoxide layer acts as a dielectric. A solid electrolyte on the surface of the oxide layer serves...
pentoxide as dielectric Niobium electrolytic capacitors use a sintered "slug" of high-purity niobium or niobiumoxide powder with niobium pentoxide as dielectric...
S2CID 95285286. Chiou, Y. L. (1971). "A note on the thicknesses of anodized niobiumoxide films". Thin Solid Films. 8 (4): R37–R39. Bibcode:1971TSF.....8R..37C...
Niobium monoxide is the inorganic compound with the formula NbO. It is a grey solid with metallic conductivity. NbO adopts an unusual cubic structure...
bodies based on niobium suboxide, Schnitter C, Wötting G Method for producing tantalum/niobium metal powders by the reduction of their oxides by gaseous magnesium...
voltage. This oxide layer serves as the dielectric in an electrolytic capacitor. The properties of this oxide layer compared with niobiumoxide layer are...
a type of collateralized debt obligation Columbium oxide (CbO), an alternate name for niobiumoxide CBO, a sandwich sold by McDonald's in some countries...
of NbCl5 followed by in situ spontaneous oxidation into low-valence niobium nano-oxides. These niobiumoxides are exposed to air atmosphere resulting in...
oxides, tungsten oxide (WO3) is the most extensively studied and well-known electrochromic material. Others include molybdenum, titanium and niobium oxides...
Hatchett had discovered columbium (now niobium). In 1809, the English chemist William Hyde Wollaston compared the oxides of columbium and tantalum, columbite...
corrosion resistant. Niobium carbide can be produced by the heating of niobiumoxide in a vacuum at 1800 °C and adding coke. Niobium carbide has a Young's...
form metal or metal oxide along with carbon dioxide. Niobium(V) oxide layers can be produced by the thermal decomposition of niobium(V) ethoxide with the...
impurity in samples of niobium pentachloride, a common reagent in niobium chemistry. In the solid state the coordination sphere for niobium is a distorted octahedron...
Eschbach J, Rouxel D, Vincent B (2009). "New Synthesis of Nanosized NiobiumOxides and Lithium Niobate Particles and Their Characterization by XPS Analysis"...
of 43% tantalum oxide, and 22,116 pounds of microlite concentrates containing an average of 68% tantalum oxide and 7% niobiumoxide. The operations were...
appropriate mixtures of the oxides; these are not usable as engineering materials, but are used as convenient sources of niobium for specialist steels and...
In chemistry, the oxidation state, or oxidation number, is the hypothetical charge of an atom if all of its bonds to other atoms were fully ionic. It...
worldwide niobium production. The niobium is mined from pyrochlore deposits and is subsequently transformed into the niobium pentoxide Nb2O5. This oxide is mixed...
minerals tantalite and columbite (columbium being an archaic name for niobium), which occur in pegmatites, an igneous rock formation. Mixtures of columbite...
enhancement of the CDW. Niobium diselenide crystals and thin films can be grown by chemical vapor deposition (CVD). Niobiumoxide, selenium and NaCl powders...
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