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Tantalum ores often contain significant amounts of niobium, which is itself a valuable metal.As such, both metals are extracted so that they may be sold. The overall process is one of hydrometallurgy and begins with a leaching step; in which the ore is treated with hydrofluoric acid and sulfuric acid to produce water-soluble hydrogen fluorides, such as the heptafluorotantalate.
A typical tantalum capacitor is a chip capacitor and consists of tantalum powder pressed and sintered into a pellet as the anode of the capacitor, with the oxide layer of tantalum pentoxide as a dielectric, and a solid manganese dioxide electrolyte as the cathode.
Tantalum(V) ethoxide is a metalorganic compound with formula Ta 2 (OC 2 H 5) 10, often abbreviated as Ta 2 (OEt) 10. It is a colorless solid that dissolves in some organic solvents but hydrolyzes readily. [3] It is used to prepare films of tantalum(V) oxide.
Tantalum oxide is used to make special high refractive index glass for camera lenses. [80] Spherical tantalum powder, produced by atomizing molten tantalum using gas or liquid, is commonly used in additive manufacturing due to its uniform shape, excellent flowability, and high melting point.
Its relative dielectric constant is ~22 and it has a thermal expansion coefficient of 8~10×10 −6 /K. The thermal conductivity of LSAT is 5.1 Wm −1 K −1. [2] [3] LSAT's (cubic) lattice parameter of 3.868 Å makes it compatible for the growth of a wide range of perovskite oxides with a relatively low strain. [citation needed]
Lead scandium tantalate (PST) is a mixed oxide of lead, scandium, and tantalum.It has the formula Pb(Sc 0.5 Ta 0.5)O 3.It is a ceramic material with a perovskite structure, [1] where the Sc and Ta atoms at the B site have an arrangement that is intermediate between ordered and disordered configurations, and can be fine-tuned with thermal treatment. [2]
Plasma electrolytic oxide coatings are generally recognized for high hardness, wear resistance, and corrosion resistance. However, the coating properties are highly dependent on the substrate used, as well as on the composition of the electrolyte and the electrical regime used (see 'Equipment used' section, above).
As quoted in an online version of: David R. Lide (ed), CRC Handbook of Chemistry and Physics, 84th Edition.CRC Press. Boca Raton, Florida, 2003; Section 4, Properties of the Elements and Inorganic Compounds; Physical Properties of the Rare Earth Metals