It is the suggestion of Wei and coauthors that when germanium, antimony and
tellurium are mixed together in the ratio of 1:2:4 -- or others along Ovshinsky's "magic" line -- both the density maxima and the associated metal-to-nonmetal transitions are pushed below the melting point and, concomitantly, the transition becomes much sharper than in other chalcogenide mixtures.
The curatives/accelerators were split into two groups of four each, with the selenium based ones in one and the
tellurium based ones in the other, and two different sulfur basic materials in each.
This shows that after annealing the
tellurium partially diffuses into bismuth and there would be mixing in the interface and makes compound films.
Different parameters were investigated for the extraction of
tellurium species from an acid medium.
The ECD solution for
tellurium deposition included 0.1 M NaOH (Kanto Chemical Co., Inc.) and 10 mM Te[O.sub.2] (Wako Pure Chemical Industries, Ltd.) dissolved in water, and then HCl (20w/w% concentration; Kishida Chemical Co., Ltd.) was added to make pH = 2.1.
Xilin Zhou of the Shanghai Institute of Microsystem and Information Technology at the Chinese Academy of Sciences said that so far, the most popular material for phase-change memory devices contains germanium, antimony, and
tellurium but compounds with three elements are more difficult to work with.
refined copper, 3.6 tons of gold, 142 tons of silver, 176 tons of
tellurium, 70 tons of selenium, 220,000 tons of free sulphur, and 5.6 mln
Many require rare elements such as gallium,
tellurium, indium and selenium.
Gehring and his team bought rocks from a former gold mine that contain kawazulite--a mineral made of bismuth,
tellurium, selenium and sulfur--and imaged electron movement on their surfaces.
Its product portfolio includes zinc, copper, lead, gold, silver, cadmium, indium, thallium,
tellurium, selenium, sulphuric acid, aluminum, sodium antimonate, mercury, zinc sulphate and zinc oxide.Country: KazakhstanSector: Metals/MiningTarget: Kazzinc JSCBuyer: Samruk-Kazyna fundVendor: Verny CapitalType: LBO, StakebuildingFinancing: DebtStatus: Closed
The company, founded in 1997, produces nickel, copper, palladium, and platinum, as well as various by-products, such as cobalt, rhodium, silver, gold, iridium, ruthenium, selenium, and
tellurium. Its operations are based in the Murmansk region and Taimyr Peninsula, Australia, Botswana, Finland and South Africa.
