{"id":16031,"date":"2023-02-24T02:49:42","date_gmt":"2023-02-24T02:49:42","guid":{"rendered":"https:\/\/bemagnet.com\/?p=16031"},"modified":"2023-02-24T05:34:22","modified_gmt":"2023-02-24T05:34:22","slug":"aimants-en-neodyme-et-terres-rares-une-comparaison-complete","status":"publish","type":"post","link":"https:\/\/bemagnet.com\/fr\/neodymium-magnets-vs-rare-earth\/","title":{"rendered":"Aimants en n\u00e9odyme et aimants en terre rare - Une comparaison compl\u00e8te"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-16036 aligncenter\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/02\/Neodymium-Magnets-Vs-Rare-Earth.jpg\" alt=\"Aimants en n\u00e9odyme et terres rares\" width=\"800\" height=\"450\" srcset=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/02\/Neodymium-Magnets-Vs-Rare-Earth.jpg 800w, https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/02\/Neodymium-Magnets-Vs-Rare-Earth-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Je sais que vous vous demandez probablement si les aimants en n\u00e9odyme et les aimants en terre rare sont diff\u00e9rents ou s'il s'agit de la m\u00eame chose.<\/p>\n<p>Ce guide met fin \u00e0 cette confusion - plongeons dans le vif du sujet :<\/p>\n<h2>Comparaison des aimants en n\u00e9odyme et des aimants en terre rare Comparaison des aimants en terre rare<\/h2>\n<p>Il existe deux types d'aimants en terres rares pour toutes les applications :<\/p>\n<ol>\n<li><a href=\"https:\/\/bemagnet.com\/fr\/aimant-neodyme-vs-aimant-ferrite\/\">Aimants en n\u00e9odyme<\/a><\/li>\n<li><a href=\"https:\/\/bemagnet.com\/fr\/smco-magnets\/\">Aimants en samarium-cobalt<\/a><\/li>\n<\/ol>\n<p>Ils sont fabriqu\u00e9s \u00e0 partir de <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rare-earth_element\">\u00e9l\u00e9ments des terres rares<\/a>. Les deux sont <a href=\"https:\/\/www.sciencedirect.com\/topics\/computer-science\/permanent-magnet\">aimants permanents<\/a> avec des champs magn\u00e9tiques puissants.<\/p>\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"Le n\u00e9odyme est en demande et la Chine contr\u00f4le son approvisionnement\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/BDwIc-plsYQ?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<p>&nbsp;<\/p>\n<p>Th\u00e9oriquement, ces aimants ont une <a href=\"https:\/\/en.wikipedia.org\/wiki\/Tesla_(unit)\">Tesla<\/a> sup\u00e9rieure \u00e0 1,2.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"200\"><strong>Variable \u00e0 comparer<\/strong><\/td>\n<td width=\"200\"><strong>Aimants en n\u00e9odyme <\/strong><\/td>\n<td width=\"200\"><strong>Aimants en samarium-cobalt<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"200\">Composition de l'\u00e9l\u00e9ment principal<\/td>\n<td width=\"200\">- N\u00e9odyme<\/p>\n<p>- Le fer<\/p>\n<p>- Bore<\/p>\n<p>- D'o\u00f9 l'abr\u00e9viation <strong><em>Aimants NdFeB<\/em><\/strong><\/p>\n<p>- Ils ont une structure cristalline<\/td>\n<td width=\"200\">- Samarium<\/p>\n<p>- Cobalt<\/p>\n<p>- Fer dans certains alliages<\/p>\n<p>- D'o\u00f9 l'abr\u00e9viation <strong><em>Aimants SmCo<\/em><\/strong><\/p>\n<p>- Ils ont une structure cristalline<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">Craquage<\/td>\n<td width=\"200\">- Moins susceptible de se fissurer<\/td>\n<td width=\"200\">- Sujet \u00e0 la fissuration ou \u00e0 l'\u00e9caillage<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">Temp\u00e9rature de fonctionnement<\/td>\n<td width=\"200\">- Ne sont pas stables \u00e0 haute temp\u00e9rature et se d\u00e9magn\u00e9tisent \u00e0 des temp\u00e9ratures sup\u00e9rieures \u00e0 80\u02daC<\/td>\n<td width=\"200\">- Les propri\u00e9t\u00e9s magn\u00e9tiques sont stables m\u00eame \u00e0 haute temp\u00e9rature<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">R\u00e9sistance \u00e0 la corrosion<\/td>\n<td width=\"200\">- N\u00e9cessite un placage en raison de sa faible r\u00e9sistance \u00e0 la corrosion<\/td>\n<td width=\"200\">- Excellentes propri\u00e9t\u00e9s de r\u00e9sistance \u00e0 la corrosion<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">D\u00e9magn\u00e9tisation<\/td>\n<td width=\"200\">- Haute r\u00e9sistance<\/td>\n<td width=\"200\">- Haute r\u00e9sistance<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">Co\u00fbt<\/td>\n<td width=\"200\">- Faible<\/td>\n<td width=\"200\">- Haut<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">Force magn\u00e9tique<\/td>\n<td width=\"200\">- Plus fort que le samarium<\/td>\n<td width=\"200\">- Fort<\/td>\n<\/tr>\n<tr>\n<td width=\"200\">Lorsque les aimants sont devenus disponibles<\/td>\n<td width=\"200\">- 1984<\/td>\n<td width=\"200\">- 1970s<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Avantages des aimants en n\u00e9odyme<\/h2>\n<p>Il y a de nombreuses raisons pour lesquelles vous pouvez envisager ces aimants :<\/p>\n<figure id=\"attachment_16032\" aria-describedby=\"caption-attachment-16032\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-16032 size-full\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/02\/Figure-1-Neodymium-Magnets-.jpg\" alt=\" Aimants en n\u00e9odyme\" width=\"600\" height=\"350\" \/><figcaption id=\"caption-attachment-16032\" class=\"wp-caption-text\">Aimants en n\u00e9odyme<\/figcaption><\/figure>\n<h3>Peut conserver ses propri\u00e9t\u00e9s magn\u00e9tiques pendant des ann\u00e9es<\/h3>\n<p>Le n\u00e9odyme peut conserver ses propri\u00e9t\u00e9s magn\u00e9tiques pendant longtemps.<\/p>\n<p>En th\u00e9orie, apr\u00e8s 10 ans, les aimants en terres rares ne peuvent perdre que 1% de leurs propri\u00e9t\u00e9s magn\u00e9tiques.<\/p>\n<p><strong>Remarque : <\/strong>Pour ce faire, vous devez utiliser ces aimants \u00e0 une temp\u00e9rature s\u00fbre (normalement 80 degr\u00e9s Celsius).<\/p>\n<h3>Une large gamme de forces magn\u00e9tiques disponibles<\/h3>\n<figure id=\"attachment_16033\" aria-describedby=\"caption-attachment-16033\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-16033 size-full\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/02\/Figure-2-Magnetic-field-strength.jpg\" alt=\"Intensit\u00e9 du champ magn\u00e9tique\" width=\"600\" height=\"350\" \/><figcaption id=\"caption-attachment-16033\" class=\"wp-caption-text\">Intensit\u00e9 du champ magn\u00e9tique<\/figcaption><\/figure>\n<p>Vous pouvez choisir entre N35, N48 et N52 (bien s\u00fbr, il existe d'autres s\u00e9ries). Par exemple, en fonction de la qualit\u00e9 du mat\u00e9riau, vous pouvez avoir :<\/p>\n<ul>\n<li>N35 - 12 200 Gauss<\/li>\n<li>N48 - 14 100 Gauss<\/li>\n<li>N52 - 14 800 Gauss<\/li>\n<\/ul>\n<p>M\u00eame si vous vous efforcez d'obtenir l'aimant en terre rare le plus puissant pour votre application, tenez compte de ses propri\u00e9t\u00e9s m\u00e9caniques. Normalement, l'augmentation de la force magn\u00e9tique contribue \u00e0 la fragilit\u00e9 de l'aimant.<\/p>\n<p>Bien que les aimants en c\u00e9ramique aient une force magn\u00e9tique plus importante, les aimants NdFeB restent puissants.<\/p>\n<h3>Id\u00e9al pour les applications o\u00f9 l'espace est limit\u00e9 mais qui requi\u00e8rent un champ magn\u00e9tique de forte intensit\u00e9<\/h3>\n<p>Dans les applications o\u00f9 l'espace est limit\u00e9, comme les haut-parleurs magn\u00e9tiques de voiture ou les haut-parleurs magn\u00e9tiques de casque, ils constituent un choix parfait.<\/p>\n<p>Ces aimants facilitent et simplifient la miniaturisation des composants. Par cons\u00e9quent, ils permettent une plus grande flexibilit\u00e9 dans la conception.<\/p>\n<h3>Non affect\u00e9 par les champs magn\u00e9tiques externes<\/h3>\n<p>Il peut r\u00e9sister \u00e0 un champ magn\u00e9tique externe sans aucune interf\u00e9rence.<\/p>\n<h2>Limites de l'aimant n\u00e9odyme \u00e0 terres rares<\/h2>\n<p>M\u00eame si vous envisagez d'utiliser ces aimants pour vos applications, vous devez tenir compte de ce qui suit :<\/p>\n<h3>Ne convient pas aux applications \u00e0 tr\u00e8s haute temp\u00e9rature<\/h3>\n<p>Au-del\u00e0 de 80\u02daC, l'aimant perd ses propri\u00e9t\u00e9s magn\u00e9tiques. C'est la raison pour laquelle vous ne pouvez pas souder ou usiner ces aimants permanents.<\/p>\n<p>La chaleur g\u00e9n\u00e9r\u00e9e par le processus d\u00e9magn\u00e9tise l'aimant.<\/p>\n<p>\u00c0 plus de 310\u02daC <a href=\"https:\/\/en.wikipedia.org\/wiki\/Curie_temperature\">temp\u00e9rature de curie<\/a>Le n\u00e9odyme perd toutes ses propri\u00e9t\u00e9s magn\u00e9tiques. Malheureusement, il est possible qu'ils ne retrouvent pas leurs propri\u00e9t\u00e9s magn\u00e9tiques.<\/p>\n<h3>Non r\u00e9sistant \u00e0 la corrosion<\/h3>\n<p>Les aimants en terre rare NdFeB ne sont pas r\u00e9sistants \u00e0 la corrosion. Ils doivent donc \u00eatre plaqu\u00e9s. En outre, en cas d'exposition \u00e0 l'humidit\u00e9, le risque d'oxydation reste \u00e9lev\u00e9.<\/p>\n<h3>Aimants \u00e0 co\u00fbt \u00e9lev\u00e9<\/h3>\n<p>Il y a des faits importants \u00e0 noter ici :<\/p>\n<ul>\n<li>Les aimants en n\u00e9odyme sont plus chers que les aimants en ferrite.<\/li>\n<li>Un aimant en terre rare abordable est un aimant en n\u00e9odyme.<\/li>\n<\/ul>\n<p>En outre, leur prix a tendance \u00e0 fluctuer. Cela est d\u00fb \u00e0 la fluctuation des prix des m\u00e9taux des terres rares.<\/p>\n<h2>Conclusion<\/h2>\n<p>Actuellement, la Chine est le premier producteur de terres rares. En 2021, la Chine a produit 168 000 tonnes. La Chine est donc le meilleur choix pour l'achat d'aimants en terres rares.<\/p>\n<p>Une raison sur laquelle vous pouvez compter <a href=\"https:\/\/bemagnet.com\/fr\/nous-contacter\/\"><strong>Aimants Daily Mag<\/strong><\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>I know you are probably wondering whether neodymium magnets and rare earth magnets are different or the same thing. Well, this guide puts this confusion to rest \u2013 Let\u2019s dive right in: Neodymium Magnets Compare Vs. Rare Earth Magnets Comparison There are two types of rare earth magnets available for any application: Neodymium magnets Samarium [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16036,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"disabled","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-16031","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Neodymium Magnets vs Rare Earth - A Complete Comparison - Dailymag<\/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:\/\/bemagnet.com\/fr\/aimants-en-neodyme-et-terres-rares\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Neodymium Magnets vs Rare Earth - A Complete Comparison - Dailymag\" \/>\n<meta property=\"og:description\" content=\"I know you are probably wondering whether neodymium magnets and rare earth magnets are different or the same thing. Well, this guide puts this confusion to rest \u2013 Let\u2019s dive right in: Neodymium Magnets Compare Vs. 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