{"id":23546,"date":"2012-08-16T16:30:35","date_gmt":"2012-08-16T16:30:35","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/?p=23546"},"modified":"2012-08-21T15:04:44","modified_gmt":"2012-08-21T15:04:44","slug":"devant-la-flambee-des-cours-du-dysprosium-toshiba-revient-vers-des-aimants-de-type-smco5-riches-en-fer","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2012\/08\/16\/devant-la-flambee-des-cours-du-dysprosium-toshiba-revient-vers-des-aimants-de-type-smco5-riches-en-fer\/","title":{"rendered":"Devant la flamb\u00e9e des cours du Dysprosium, Toshiba revient vers des aimants de type SmCo5 riches en Fer"},"content":{"rendered":"<p>La composition optimale des aimants permanents \u00e0 base de terres rares doit \u00eatre adapt\u00e9e au gr\u00e9 des cours des m\u00e9taux qui entrent dans leur recette d&rsquo;\u00e9laboration. Aux temps des terres rares kazakhes ou chinoises abondantes et peu ch\u00e8res, il y a de cela une d\u00e9cennie environ, les excellents aimants de type Samarium-Cobalt avaient \u00e9t\u00e9 abandonn\u00e9s en raison des cours du Cobalt, m\u00e9tal hautement sp\u00e9culatif, qui rendaient son usage \u00e9conomiquement malais\u00e9. Ce sont les aimants de type N\u00e9odyme-Fer-Bore am\u00e9lior\u00e9s par un ajout de Dysprosium pour les rendre plus performants \u00e0 hautes temp\u00e9ratures\u00a0 qui avaient alors pris le dessus. Mais voil\u00e0, le dysprosium est un m\u00e9tal actuellement hors de prix, car il n&rsquo;est pr\u00e9sent que dans certains gisements de terres rares, en raison de processus de gen\u00e8se complexes de ces m\u00e9taux encore associ\u00e9s aux actino\u00efdes \u00e0 dur\u00e9e de demi-vie longue comme l&rsquo;Uranium ou le Thorium.<\/p>\n<p><a href=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/08\/terres-rares-applications.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-23552\" title=\"terres rares applications\" src=\"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/08\/terres-rares-applications-300x148.jpg\" alt=\"\" width=\"400\" height=\"198\" srcset=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/08\/terres-rares-applications-300x150.jpg 300w, https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/08\/terres-rares-applications.jpg 1022w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>Rappelons que le mishmetal, m\u00e9lange de terres rares riches en Lanthane et C\u00e9rium est utilis\u00e9 depuis des lustres dans la production de pierres \u00e0 briquet&#8230;ceci ram\u00e8ne les terres-rares \u00e0 leur statut trivial de m\u00e9taux largement r\u00e9pandus sur terre mais dont l&rsquo;extraction et la purification est associ\u00e9e \u00e0 la m\u00e9tallurgie d&rsquo;\u00e9l\u00e9ments radioactifs, dont ils sont parfois les sous-produits. Enfin pour les soi-disant experts en \u00e9nergies que nous subissons et qui hantent lamentablement nos \u00e9crans de TV, rappelons ce d\u00e9tail qui veut que les modules photovolta\u00efques ne font pas appels \u00e0 des terres rares dans leur composition mais que ce sont les \u00e9oliennes en mode \u00ab\u00a0direct drive\u00a0\u00bb qui les utilisent dans les aimants permanents de leurs g\u00e9n\u00e9rateurs. Enfin et pour finir ce tour d&rsquo;horizon, rappelons que les accumulateurs de type Ni-MH utilisent de grandes quantit\u00e9s d&rsquo;alliages de structures LaNi5\u00a0 qui absorbent les atomes d&rsquo;hydrog\u00e8ne g\u00e9n\u00e9r\u00e9s lors de la r\u00e9action de r\u00e9duction des solvants aqueux alcalins de ces accumulateurs. Le recyclage de ces accumulateurs constitue une ressource rentable de ces m\u00e9taux de plus en plus valoris\u00e9s et associ\u00e9s \u00e0 du Nickel et du Cobalt.<\/p>\n<p>Toshiba, un des leaders japonais dans la formulation d&rsquo;aimants permanents, vient d&rsquo;annoncer qu&rsquo;il avait mis au point des aimants de types SmCo5 riches en Fer (15 \u00e0 20% en masse) qui pr\u00e9sentent des propri\u00e9t\u00e9s similaires ou sup\u00e9rieures \u00e0 hautes temp\u00e9ratures\u00a0 \u00e0 celles des aimants de type NdFeB enrichis en Dysprosium.<\/p>\n<p>Juste retour des choses vers les prestigieux aimants de types Samarium-Cobalt<\/p>\n<p>LIRE <a href=\"http:\/\/www.toshiba.co.jp\/about\/press\/2012_08\/pr1601.htm\" target=\"_blank\">le communiqu\u00e9 de Toshiba sur le sujet<\/a>.<\/p>\n<p>Le 16 Ao\u00fbt 2012<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La composition optimale des aimants permanents \u00e0 base de terres rares doit \u00eatre adapt\u00e9e au gr\u00e9 des cours des m\u00e9taux qui entrent dans leur recette d&rsquo;\u00e9laboration. Aux temps des terres rares kazakhes ou chinoises abondantes et peu ch\u00e8res, il y a de cela une d\u00e9cennie environ, les excellents aimants de type Samarium-Cobalt avaient \u00e9t\u00e9 abandonn\u00e9s [&hellip;]<\/p>\n","protected":false},"author":341,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23546","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Devant la flamb\u00e9e des cours du Dysprosium, Toshiba revient vers des aimants de type SmCo5 riches en Fer - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2012\/08\/16\/devant-la-flambee-des-cours-du-dysprosium-toshiba-revient-vers-des-aimants-de-type-smco5-riches-en-fer\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Devant la flamb\u00e9e des cours du Dysprosium, Toshiba revient vers des aimants de type SmCo5 riches en Fer - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"La composition optimale des aimants permanents \u00e0 base de terres rares doit \u00eatre adapt\u00e9e au gr\u00e9 des cours des m\u00e9taux qui entrent dans leur recette d&rsquo;\u00e9laboration. Aux temps des terres rares kazakhes ou chinoises abondantes et peu ch\u00e8res, il y a de cela une d\u00e9cennie environ, les excellents aimants de type Samarium-Cobalt avaient \u00e9t\u00e9 abandonn\u00e9s [&hellip;]\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/files\/2012\/08\/terres-rares-applications.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Raymond Bonnaterre\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2012\/08\/16\/devant-la-flambee-des-cours-du-dysprosium-toshiba-revient-vers-des-aimants-de-type-smco5-riches-en-fer\/\",\"url\":\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2012\/08\/16\/devant-la-flambee-des-cours-du-dysprosium-toshiba-revient-vers-des-aimants-de-type-smco5-riches-en-fer\/\",\"name\":\"Devant la flamb\u00e9e des cours du Dysprosium, Toshiba revient vers des aimants de type SmCo5 riches en Fer - 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