{"id":22914,"date":"2026-03-09T10:10:37","date_gmt":"2026-03-09T02:10:37","guid":{"rendered":"https:\/\/www.cndailymag.com\/?p=22914"},"modified":"2026-03-09T10:11:31","modified_gmt":"2026-03-09T02:11:31","slug":"composition-des-matieres-premieres-et-effets-du-ndfeb-fritte","status":"publish","type":"post","link":"https:\/\/www.cndailymag.com\/fr\/composition-des-matieres-premieres-et-effets-du-ndfeb-fritte\/","title":{"rendered":"Composition des mati\u00e8res premi\u00e8res et effets du NdFeB fritt\u00e9"},"content":{"rendered":"

Nous savons tous que les principales mati\u00e8res premi\u00e8res des aimants permanents NdFeB fritt\u00e9s sont le n\u00e9odyme, le fer et le bore. Cependant, de nombreux autres \u00e9l\u00e9ments y sont ajout\u00e9s, chacun jouant un r\u00f4le sp\u00e9cifique au sein de l'aimant. Les fabricants con\u00e7oivent souvent leurs formulations en fonction des besoins des utilisateurs, ce qui explique que la composition des mati\u00e8res premi\u00e8res soit un secret bien gard\u00e9.<\/p>\n

La douzaine d'\u00e9l\u00e9ments qui composent les aimants NdFeB fritt\u00e9s sont comparables aux diff\u00e9rents assaisonnements d'un plat. C'est la combinaison scientifique et syst\u00e9matique de ces \u00e9l\u00e9ments, aux propri\u00e9t\u00e9s et fonctions intrins\u00e8ques distinctes, qui conf\u00e8re aux aimants NdFeB leurs diff\u00e9rentes qualit\u00e9s et propri\u00e9t\u00e9s. Comprendre l'importance de chaque \u00e9l\u00e9ment est essentiel pour appr\u00e9hender au mieux les performances et les co\u00fbts de fabrication des diff\u00e9rentes qualit\u00e9s. Nous pr\u00e9sentons ci-dessous bri\u00e8vement le r\u00f4le de ces \u00e9l\u00e9ments.<\/p>\n

Pour une meilleure compr\u00e9hension, nous pouvons diviser les \u00e9l\u00e9ments constitutifs des aimants NdFeB en trois cat\u00e9gories\u00a0:<\/p>\n

\u25c7 Premi\u00e8rement, les principaux \u00e9l\u00e9ments RE (Ce, Gd, Nd, Dy, etc.), Fe et B, qui sont principalement responsables de la formation des grains de la phase principale RE2Fe14B.<\/p>\n

\u25c7 Deuxi\u00e8mement, les \u00e9l\u00e9ments mineurs tels que Al, Co, Ga et Zr sont principalement responsables de l'optimisation du rev\u00eatement des joints de grains sur les grains de la phase principale.<\/p>\n

\u25c7 Troisi\u00e8mement, des \u00e9l\u00e9ments d\u2019impuret\u00e9s, tels que le carbone et l\u2019oxyg\u00e8ne, sont in\u00e9vitablement introduits dans les mati\u00e8res premi\u00e8res et la production.<\/p>\n

Un sch\u00e9ma des types d'\u00e9l\u00e9ments NdFeB est pr\u00e9sent\u00e9 ci-dessous.<\/p>\n

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Lors du processus de production, afin de garantir des performances optimales pour les diff\u00e9rentes formulations, il est g\u00e9n\u00e9ralement n\u00e9cessaire d'inspecter et de traiter les mati\u00e8res premi\u00e8res avant leur utilisation afin de r\u00e9pondre \u00e0 certaines exigences de base. Cependant, en raison des diff\u00e9rents proc\u00e9d\u00e9s de production employ\u00e9s par les fabricants de mati\u00e8res premi\u00e8res, des \u00e9carts surviennent fr\u00e9quemment. Par exemple, le rapport Pr\/Nd peut varier de 20:80 \u00e0 25:75, la teneur en GdFe peut \u00eatre inf\u00e9rieure \u00e0 75% et la teneur en B du BFe peut fluctuer consid\u00e9rablement d'un lot \u00e0 l'autre. Par cons\u00e9quent, il est imp\u00e9ratif de prendre en compte la teneur r\u00e9elle indiqu\u00e9e dans le rapport de contr\u00f4le qualit\u00e9 de chaque lot avant d'utiliser les mati\u00e8res premi\u00e8res.<\/p>\n

Chaque \u00e9l\u00e9ment d'un aimant NdFeB poss\u00e8de ses propres propri\u00e9t\u00e9s uniques, telles que\u00a0:<\/p>\n

\u25c7 L\u2019introduction des \u00e9l\u00e9ments La et Ce r\u00e9duit la r\u00e9manence (Br) et la coercivit\u00e9 (Hcj) de l\u2019aimant, mais ils sont tr\u00e8s peu co\u00fbteux, ce qui r\u00e9duit les co\u00fbts\u00a0;<\/p>\n

\u25c7 Le Nd pur rempla\u00e7ant le PrNd pour former REFeB a une aimantation \u00e0 saturation tr\u00e8s \u00e9lev\u00e9e et peut \u00eatre utilis\u00e9 pour pr\u00e9parer des aimants \u00e0 r\u00e9manence ultra-\u00e9lev\u00e9e\u00a0;<\/p>\n

\u25c7 L\u2019introduction d\u2019\u00e9l\u00e9ments Tb peut augmenter consid\u00e9rablement le Hcj de l\u2019aimant, mais elle est extr\u00eamement co\u00fbteuse\u00a0;<\/p>\n

\u25c7 Les \u00e9l\u00e9ments Gd sont relativement peu co\u00fbteux, et le REFeB form\u00e9 \u00e0 partir d'eux a la temp\u00e9rature de Curie la plus \u00e9lev\u00e9e, permettant la pr\u00e9paration d'aimants r\u00e9sistants aux hautes temp\u00e9ratures, mais il r\u00e9duit consid\u00e9rablement le Br.<\/p>\n

Pour comprendre comment combiner les \u00e9l\u00e9ments afin de fabriquer des aimants aux performances requises au moindre co\u00fbt, il est n\u00e9cessaire de comprendre les propri\u00e9t\u00e9s de chaque \u00e9l\u00e9ment du NdFeB.<\/p>\n

Le co\u00fbt des mat\u00e9riaux repr\u00e9sente entre 80% et 90%, voire plus, du co\u00fbt total, principalement repr\u00e9sent\u00e9 par les cat\u00e9gories \u201c\u00a0\u00e9lev\u00e9\u00a0\u201d et \u201c\u00a0faible\u00a0\u201d. Le signe \u201c\u00a0-\u00a0\u201d indique des quantit\u00e9s tr\u00e8s faibles ajout\u00e9es ou des prix bas, ayant peu d'impact sur le co\u00fbt global. L'ajout de La et de Ce vise principalement \u00e0 r\u00e9duire les co\u00fbts\u00a0; ces derni\u00e8res ann\u00e9es, gr\u00e2ce aux progr\u00e8s technologiques constants, les aimants \u00e0 base de c\u00e9rium sont de plus en plus utilis\u00e9s dans les aimants de haute qualit\u00e9.<\/p>\n

En acqu\u00e9rant une compr\u00e9hension approfondie des caract\u00e9ristiques de ces \u00e9l\u00e9ments et en clarifiant l'impact de leur ajout sur les processus de frittage, la densit\u00e9 de frittage, les processus de vieillissement et les performances du produit, nous pouvons orienter la production de produits NdFeB avec une rentabilit\u00e9 \u00e9lev\u00e9e.<\/p>\n

\"\"

We all know that the main raw materials for sintered NdFeB permanent magnets are neodymium, iron, and boron. However, many other elements are added to the raw materials, each playing a different role in the magnet. Manufacturers often design product formulations based on user needs, making the raw material formulation a closely guarded secret. The…<\/p>","protected":false},"author":15,"featured_media":22915,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22914","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"acf":[],"yoast_head":"\nRaw material composition and effects of sintered NdFeB - Dailymag Technology | Magnet, NdFeB Magnet, Magnetic Assembly, Permanent Magnet, Linear Actuator, Sharps Container<\/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:\/\/www.cndailymag.com\/fr\/composition-des-matieres-premieres-et-effets-du-ndfeb-fritte\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Raw material composition and effects of sintered NdFeB - Dailymag Technology | Magnet, NdFeB Magnet, Magnetic Assembly, Permanent Magnet, Linear Actuator, Sharps Container\" \/>\n<meta property=\"og:description\" content=\"We all know that the main raw materials for sintered NdFeB permanent magnets are neodymium, iron, and boron. 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