SCIE 1P50 Lecture Notes - Lecture 4: Rare Earth Element, Erbium, Dysprosium
3 Dec 2015
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[lecture reading: rare earth elements and critical metal content of. 17 exist in small concentrations: the lanthanides group on the periodic. Table and yttrium; they are mined as mixed ores and used in electronic devices, rechargeable batteries, guidance systems, and wind turbines china produces/supplies ~95% of the world"s rare earth elements. Europium: permanent magnets, headphones, hybrid engines hard drives, headphones, hybrid engines red colour on television etc. , screens hybrid engines, metal alloys optical fibers, lasers. Found in small concentrations in ore deposits. Typically several rare earth elements are mixed together. Many processes are required to separate and remove unwanted elements especially uranium and thorium which are . Acid/base leaching and conversion to oxides . The first mobile phone was made 40 years ago with 30 elements needed to produce it today, the iphone 6 is made up of 75 elements. Many of the 75 elements are obtained from countries with few regulations and over----- of extraction processes.
