{"id":128319,"date":"2023-01-26T10:08:09","date_gmt":"2023-01-26T10:08:09","guid":{"rendered":"https:\/\/raed.academy\/?p=128319"},"modified":"2023-01-27T09:46:13","modified_gmt":"2023-01-27T09:46:13","slug":"per-a-que-serveixen-les-terres-rares","status":"publish","type":"post","link":"https:\/\/raed.academy\/ca\/per-a-que-serveixen-les-terres-rares\/","title":{"rendered":"Per a qu\u00e8 serveixen les terres rares"},"content":{"rendered":"<div id=\"attachment_113823\" style=\"width: 381px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-113823\" class=\"wp-image-113823\" src=\"https:\/\/raed.academy\/wp-content\/uploads\/2022\/03\/August-Corominas-Vilardell.webp\" sizes=\"(max-width: 371px) 100vw, 371px\" srcset=\"https:\/\/raed.academy\/wp-content\/uploads\/2022\/03\/August-Corominas-Vilardell.webp 600w, https:\/\/raed.academy\/wp-content\/uploads\/2022\/03\/August-Corominas-Vilardell-400x300.webp 400w\" alt=\"August Corominas Vilardell\" width=\"371\" height=\"278\" aria-describedby=\"caption-attachment-113823\" \/><p id=\"caption-attachment-113823\" class=\"wp-caption-text\">Dr. August Corominas<\/p><\/div>\n<p><a href=\"https:\/\/raed.academy\/ca\/academics\/dr-august-corominas-vilardell\/\" target=\"_blank\" rel=\"noopener\"><em><strong>August Corominas<\/strong><\/em><\/a>, professor de Fisiologia Humana de la<strong> Universitat de M\u00farcia<\/strong> i de la <strong>Universitat Aut\u00f2noma de Barcelona<\/strong> i acad\u00e8mic em\u00e8rit i membre del <strong>Senat<\/strong> de la <strong>Reial Acad\u00e8mia Europea de Doctors-Barcelona 1914<\/strong> (RAED), presenta a la comunitat acad\u00e8mica els s\u00edmbols qu\u00edmics, etimologia i aplicacions principals de les anomenades terres rares, fonamentals per al futur de la transici\u00f3 tecnol\u00f2gica. &#8220;La gran import\u00e0ncia cient\u00edfica, pol\u00edtica, econ\u00f2mica i administrativa ens indueix a explicar d&#8217;una manera senzilla l&#8217;espectre dels 17 minerals que presumptament canviaran la vida dels habitants biosf\u00e8rics d&#8217;aqu\u00ed a pocs anys&#8221;, assenyala. Una informaci\u00f3 que complementa el seu recent article <strong>&#8220;Nauru i les terres rares&#8221;<\/strong>, una reflexi\u00f3 sobre la cara fosca de la colonitzaci\u00f3 i la transici\u00f3 energ\u00e8tica.<\/p>\n<p><strong>Ceri (Ce)<\/strong>, pel planeta nan Ceres:<br \/>\nOxidant qu\u00edmic, polit de lents, colorant groc per a objectes de vidre i cer\u00e0mica, catalitzador de forns amb autoneteja, catalitzador de cracking en refineries de petroli, pedres de ferrosi per a encenedors.<\/p>\n<p><strong>Disprosi (Dy)<\/strong>, del grec &#8220;dysprositos&#8221; (dif\u00edcil d&#8217;obtenir).<br \/>\nImants de terres rares, l\u00e0sers.<\/p>\n<p><strong>Erbi (Er)<\/strong>, per la vila d&#8217;Ytterby (Su\u00e8cia).<br \/>\nL\u00e0sers, acer al vanadi.<\/p>\n<p><strong>Escandi (Sc)<\/strong>, del llat\u00ed Scandia (Escandin\u00e0via), on es van descobrir els primers minerals de terres rares.<br \/>\nAliatges d&#8217;alumini-escandi per a components aeroespacials, additiu en l\u00e0mpades de vapor de mercuri.<\/p>\n<p><strong>Europi (Eu)<\/strong>, pel continent d&#8217;Europa.<br \/>\nF\u00f2sfors vermell i blau per a pantalles de televisi\u00f3 i ordinadors, l\u00e0sers, additiu en l\u00e0mpades de vapor de mercuri, resson\u00e0ncia magn\u00e8tica.<\/p>\n<p><strong>Gadolini (Gd)<\/strong>, per Johan Gadolin (1760-1852), investigador de les terres rares.<br \/>\nImants de terres rares, vidres i granats d&#8217;alt \u00edndex de refracci\u00f3, l\u00e0sers, raigs X, mem\u00f2ries de computadors, captura de neutrons, contrastant en resson\u00e0ncia magn\u00e8tica, resson\u00e0ncia magn\u00e8tica.<\/p>\n<p><strong>Holmi (Ho)<\/strong>, per Estocolm (en llat\u00ed Holmia), lloc de naixement d&#8217;un dels seus descobridors.<br \/>\nL\u00e0sers.<\/p>\n<p><strong>Iterbi (Yb<\/strong>), per la vila d&#8217;Ytterby (Su\u00e8cia).<br \/>\nL\u00e0sers infrarojos, reductor qu\u00edmic.<\/p>\n<p><strong>Itri (Y)<\/strong>, per la vila d&#8217;Ytterby (Su\u00e8cia), on es va descobrir el seu primer mineral.<br \/>\nL\u00e0sers de granat d&#8217;itri-alumini, vanadat d&#8217;itri com a suport de l&#8217;europi al f\u00f2sfor vermell, superconductors a alta temperatura, filtres de microones de granat d&#8217;itri i ferro.<\/p>\n<p><strong>Lant\u00e0 (La)<\/strong>, del grec &#8220;lanthanein&#8221; (ocult).<br \/>\nVidres d&#8217;alt \u00edndex de refracci\u00f3, component del mischmetal per a pedres d&#8217;encenedors, emmagatzematge d&#8217;hidrogen, el\u00e8ctrodes de bateries, lents fotogr\u00e0fics, catalitzador de cracking en refineries de petroli.<\/p>\n<p><strong>Luteci (Lu)<\/strong>, per Lutetia, nom de la ciutat que despr\u00e9s seria Par\u00eds.<br \/>\nDetectors pets, vidres d&#8217;alt \u00edndex de refracci\u00f3.<\/p>\n<p><strong>Neodimi (Nd)<\/strong>, del grec &#8220;neos&#8221; (nou) i &#8220;didymos&#8221; (bess\u00f3).<br \/>\nImants de terres rares, l\u00e0sers, colorant violeta per a vidres i cer\u00e0miques, condensadors cer\u00e0mics.<\/p>\n<p><strong>Praseodimi (Pr)<\/strong>, del grec &#8220;prassos&#8221; (porro) i didymos (bess\u00f3).<br \/>\nImants de terres rares, l\u00e0sers, material de suport en l\u00e0mpades d&#8217;arc de carb\u00f3, colorant per a vidres i esmalts, additiu per al vidre de didimi usat en m\u00e0scares de soldadura, component de la pedra de ferrosi usada en encenedors.<\/p>\n<p><strong>Prometi (Pm)<\/strong>, pel tit\u00e0 Prometeu, que va donar el foc als humans.<br \/>\nBateries at\u00f2miques i nuclears.<\/p>\n<p><strong>Samari (Sm)<\/strong>, per Vasili Samarsky-Bykhovets, descobridor del mineral samarskita.<br \/>\nImants de terres rares, l\u00e0sers, captura de neutrons, amplificadors de microones.<\/p>\n<p><strong>Terbi (Tb)<\/strong>, per la vila d&#8217;Ytterby (Su\u00e8cia).<br \/>\nF\u00f2sfors verds, l\u00e0sers, llums fluorescents.<\/p>\n<p><strong>Tuli (Tm)<\/strong>, per la terra m\u00edtica de Tule.<br \/>\nEquips port\u00e0tils de raigs X.<\/p>\n<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-126340\" src=\"https:\/\/raed.academy\/wp-content\/uploads\/2022\/12\/tabla-periodica-de-los-elementos-no-atrib-licencia-Pixabay.com_.webp\" sizes=\"(max-width: 1400px) 100vw, 1400px\" srcset=\"https:\/\/raed.academy\/wp-content\/uploads\/2022\/12\/tabla-periodica-de-los-elementos-no-atrib-licencia-Pixabay.com_.webp 1400w, https:\/\/raed.academy\/wp-content\/uploads\/2022\/12\/tabla-periodica-de-los-elementos-no-atrib-licencia-Pixabay.com_-768x557.webp 768w, https:\/\/raed.academy\/wp-content\/uploads\/2022\/12\/tabla-periodica-de-los-elementos-no-atrib-licencia-Pixabay.com_-1080x784.webp 1080w\" alt=\"tabla\" width=\"1400\" height=\"1016\" aria-describedby=\"caption-attachment-126340\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>August Corominas presenta els s\u00edmbols qu\u00edmics, etimologia i aplicacions principals de les anomenades terres rares, fonamentals per al futur de la transici\u00f3 tecnol\u00f2gica<\/p>\n","protected":false},"author":12,"featured_media":126341,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[325],"tags":[],"class_list":["post-128319","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-enginyeria-industrial","et-has-post-format-content","et_post_format-et-post-format-standard"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Per a qu\u00e8 serveixen les terres rares - Reial Acad\u00e8mia Europea de Doctors<\/title>\n<meta name=\"description\" content=\"August Corominas presenta els s\u00edmbols qu\u00edmics, etimologia i aplicacions principals de les anomenades terres rares, fonamentals per al futur de la transici\u00f3 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