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Early bulbs, as well as some new antique reproductions, are made in various shapes and then painted like Christmas ornaments. Bubble lights and twinkle bulbs also come in this size. Outdoor-only bulbs are designated C 9 + 1 ⁄ 4 (1 + 5 ⁄ 32 in, or 29 mm), and have a similar blunt shape as the C 7 + 1 ⁄ 2, but use an E17 "intermediate" base ...
Tantalite has the same mineral structure as columbite (Fe, Mn) (Ta, Nb) 2 O 6; when there is more tantalum than niobium it is called tantalite and when there is more niobium than tantalum is it called columbite (or niobite). The high density of tantalite and other tantalum containing minerals makes the use of gravitational separation the best ...
The differences between tantalum and niobium were unequivocally demonstrated in 1864 by Christian Wilhelm Blomstrand [20] and Henri Étienne Sainte-Claire Deville, as well as Louis J. Troost, who determined the formulas of some of the compounds in 1865 [20] [21] and finally by Swiss chemist Jean Charles Galissard de Marignac [22] in 1866, who ...
[15] [16] This confusion arose from the minimal observed differences between tantalum and niobium. The claimed new elements pelopium, ilmenium, and dianium [17] were in fact identical to niobium or mixtures of niobium and tantalum. [18] Pure tantalum was not produced until 1903. [19]
Apollo CSM with the dark rocket nozzle made from niobium-titanium alloy . Niobium is nearly always found together with tantalum, and was named after Niobe, the daughter of the mythical Greek king Tantalus for whom tantalum was named. Niobium has many uses, some of which it shares with other refractory metals.
Tantalum anodizes similarly to titanium and niobium with a range of attractive colors being formed by interference at different film thicknesses. Again the film thickness is dependent on the anodizing voltage and typically ranges from 18 to 23 Angstroms per volt depending on electrolyte and temperature. Uses include tantalum capacitors.
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Most commonly, conventional superconductors such as niobium–titanium are used, [1] but high-temperature superconductors such as YBCO are entering the market. Superconducting wire's advantages over copper or aluminum include higher maximum current densities and zero power dissipation.
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