Detail A Tantalising Prospect; Manufacturing Metals   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 406 no. 8823 (Feb. 2013), page 70-71. Topik: Metals; Production Methods; Materials Science Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.75 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel Aluminium was once more costly than gold. Napoleon III, emperor of France, reserved cutlery made from it for his most favoured guests, and the Washington monument, in America's capital, was capped with it not because the builders were cheapskates but because they wanted to show off. How times change. And in aluminium's case they changed because, in the late 1880s, Charles Hall and Paul Heroult worked out how to separate the stuff from its oxide using electricity rather than chemical reducing agents. Now, the founders of Metalysis, a small British firm, hope to do much the same with tantalum, titanium and a host of other recherche and expensive metallic elements including neodymium, tungsten and vanadium. The effect could be profound. Tantalum is an ingredient of the best electronic capacitors. At the moment it is so expensive ($500-2,000 a kilogram) that it is worth using only in things where size and weight matter a lot, such as mobile phones. Guppy Dhariwal, Metalysis's boss, thinks that the company can make titanium powder (the product of its new process) for less than a tenth of such powder's current price. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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