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alumina-chromium powder

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  • chromium processing — Introduction       preparation of the ore for use in various products.       Chromium (Cr) is a brilliant, hard, refractory metal that melts at 1,857° C (3,375° F) and boils at 2,672° C (4,842° F). In the pure state, it is resistant to ordinary… …   Universalium

  • Transparent alumina — is a transparent form of aluminium oxide, Al2O3. In bulk, solid form, alumina is a colorless, transparent solid. Rubies and sapphires are two forms, containing different impurities, which occur naturally. Rubies and sapphires can also be… …   Wikipedia

  • Aluminium oxide — Alumina redirects here. For the company, see Alumina Limited. This article is about aluminium(III) oxide Al2O3. For other uses, see Aluminium oxide (disambiguation). Aluminium oxide …   Wikipedia

  • steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …   Universalium

  • Alum — This article is about the chemical compound. For other uses, see Alum (disambiguation). Bulk alum Alum (  / …   Wikipedia

  • Verneuil process — The Verneuil process, also called flame fusion, was the first commercially successful method of manufacturing synthetic gemstones, developed in 1902 by the French chemist Auguste Verneuil. It is primarily used to produce the ruby and sapphire… …   Wikipedia

  • metallurgy — metallurgic, metallurgical, adj. metallurgically, adv. metallurgist /met l err jist/ or, esp. Brit., /meuh tal euhr jist/, n. /met l err jee/ or, esp. Brit., /meuh tal euhr jee/, n. 1. the technique or science of working or heating metals so as… …   Universalium

  • crystal — crystallike, adj. /kris tl/, n., adj., v., crystaled, crystaling or (esp. Brit.) crystalled, crystalling. n. 1. a clear, transparent mineral or glass resembling ice. 2. the transparent form of crystallized quartz. 3. Chem., Mineral. a solid body… …   Universalium

  • Verneuil process — /verr noy /; Fr. /verdd nue yeu/ a process for making synthetic rubies, sapphires, spinels, etc., by the fusion at high temperatures of powdered compounds. Also called flame fusion process. [named after A.V.L. Verneuil, 19th century French… …   Universalium

  • Sapphire — For other uses, see Sapphire (disambiguation). Sapphire The 423 carat (85 g) blue Logan sapphire General Category Oxide mineral …   Wikipedia

  • Ruby — This article is about the mineral. For other uses, see Ruby (disambiguation). Ruby Natural ruby crystals from Winza, Tanzania General Category …   Wikipedia

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