{"id":16983,"date":"2023-10-09T05:12:59","date_gmt":"2023-10-09T05:12:59","guid":{"rendered":"https:\/\/bemagnet.com\/?p=16983"},"modified":"2023-10-09T05:12:59","modified_gmt":"2023-10-09T05:12:59","slug":"imanes-n40","status":"publish","type":"post","link":"https:\/\/bemagnet.com\/pt\/n40-magnets\/","title":{"rendered":"\u00cdmanes de neod\u00edmio N40: Um guia completo"},"content":{"rendered":"<p>Os \u00edmanes de neod\u00edmio N40 s\u00e3o \u00edmanes de terras raras distintos, classificados com base no seu produto energ\u00e9tico m\u00e1ximo. Esta classifica\u00e7\u00e3o dos \u00edmanes de neod\u00edmio apresenta um BHmax de 40 MGOe, o que os torna alguns dos \u00edmanes permanentes mais resistentes.<\/p>\n<figure id=\"attachment_16984\" aria-describedby=\"caption-attachment-16984\" style=\"width: 527px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16984\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/10\/figure-1-N40-Neodymium-magnets.jpg\" alt=\"\u00cdmanes de neod\u00edmio N40\" width=\"527\" height=\"362\" \/><figcaption id=\"caption-attachment-16984\" class=\"wp-caption-text\">\u00cdmanes de neod\u00edmio N40<\/figcaption><\/figure>\n<h2>Vantagens do \u00edman N40<\/h2>\n<p>Os \u00edmanes N40 oferecem in\u00fameras vantagens em compara\u00e7\u00e3o com outros tipos de \u00edmanes NdFeB. Eis as vantagens mais importantes:<\/p>\n<h3>Elevada for\u00e7a magn\u00e9tica<\/h3>\n<p>N40 <a href=\"https:\/\/bemagnet.com\/pt\/imanes-de-neodimio\/\">\u00edmanes de neod\u00edmio<\/a> s\u00e3o classificados de acordo com a sua for\u00e7a magn\u00e9tica, que \u00e9 impressionantemente de 40 MGOe. Esta \u00e9 relativamente mais forte do que outros tipos de \u00edmanes de neod\u00edmio, bem como do que outros \u00edmanes de terras raras. Devido ao seu forte poder magn\u00e9tico, os \u00edmanes N40 s\u00e3o muito utilizados em aplica\u00e7\u00f5es que exigem for\u00e7as magn\u00e9ticas poderosas.<\/p>\n<h3>Versatilidade<\/h3>\n<p>Equipados com uma for\u00e7a magn\u00e9tica comparativamente elevada, os \u00edmanes N40 adequam-se perfeitamente a v\u00e1rias aplica\u00e7\u00f5es. Podem ser produzidos em v\u00e1rios tamanhos e formas, o que aumenta ainda mais a sua versatilidade. S\u00e3o utilizados de forma proeminente em diferentes dom\u00ednios, desde a eletr\u00f3nica de consumo ao equipamento m\u00e9dico.<\/p>\n<h3>Econ\u00f3mico<\/h3>\n<p>Os \u00edmanes de neod\u00edmio s\u00e3o consideravelmente econ\u00f3micos, especialmente quando comparados com os \u00edmanes de sam\u00e1rio-cobalto. A classe de \u00edmanes N40, em particular, oferece um excelente equil\u00edbrio entre custo e desempenho. Este facto aumenta a sua adequa\u00e7\u00e3o a aplica\u00e7\u00f5es com restri\u00e7\u00f5es or\u00e7amentais.<\/p>\n<h3>Estabilidade t\u00e9rmica<\/h3>\n<p>Com uma temperatura de curie de at\u00e9 350 \u00b0C e uma temperatura m\u00e1xima de funcionamento de aproximadamente 80 \u00b0C, os \u00edmanes NdFeB N40 apresentam uma toler\u00e2ncia relativamente elevada \u00e0s flutua\u00e7\u00f5es de temperatura.<\/p>\n<h3>Tempo de vida prolongado<\/h3>\n<p>Todos os tipos de \u00edmanes de neod\u00edmio s\u00e3o geralmente \u00edmanes permanentes de terras raras. Esta qualidade traduz-se em d\u00e9cadas de servi\u00e7o impec\u00e1vel. Os \u00edmanes N40 podem suportar mudan\u00e7as extremas de temperatura, o que aumenta a sua capacidade de resistir \u00e0 desmagnetiza\u00e7\u00e3o.<\/p>\n<h3>Efici\u00eancia energ\u00e9tica<\/h3>\n<p>Outros tipos de \u00edmanes, como os electro\u00edmanes, necessitam de eletricidade para originar campos magn\u00e9ticos. No entanto, os \u00edmanes de terras raras de neod\u00edmio N40 originam internamente campos magn\u00e9ticos robustos, o que resulta em efici\u00eancia energ\u00e9tica.<\/p>\n<h3>Tamanho pequeno<\/h3>\n<p>O \u00edman N40 pode ser fabricado em tamanhos relativamente pequenos, o que n\u00e3o significa que as for\u00e7as magn\u00e9ticas sejam baixas. Isto \u00e9 altamente vantajoso, especialmente para aplica\u00e7\u00f5es que exigem for\u00e7as magn\u00e9ticas robustas, mas com espa\u00e7o limitado.<\/p>\n<h2>Principais carater\u00edsticas dos \u00edmanes de neod\u00edmio N40<\/h2>\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe loading=\"lazy\" title=\"\u00cdman de neod\u00edmio com escareado\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/187i836yuYc?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>Em compara\u00e7\u00e3o com outros tipos de \u00edmanes de neod\u00edmio, bem como com outros <a href=\"https:\/\/en.wikipedia.org\/wiki\/Rare-earth_magnet\">\u00edmanes permanentes de terras raras<\/a>Os \u00edmanes de neod\u00edmio N40 s\u00e3o bastante populares. Apresentam carater\u00edsticas distintas e aqui est\u00e1 uma an\u00e1lise das suas carater\u00edsticas principais:<\/p>\n<h3>Produto Maximum Energy<\/h3>\n<p>O produto de energia m\u00e1xima \u00e9 normalmente abreviado como BHmax e mede a pot\u00eancia dos \u00edmanes. O valor BHmax dos \u00edmanes N40 \u00e9 40MGOe e isto traduz-se em for\u00e7as magn\u00e9ticas relativamente poderosas.<\/p>\n<h3>Temperatura m\u00e1xima de funcionamento<\/h3>\n<p>Os \u00edmanes permanentes de neod\u00edmio N40 devem funcionar dentro de certos limites de temperatura para que as suas capacidades magn\u00e9ticas permane\u00e7am \u00f3ptimas. Se forem sujeitos a temperaturas superiores a 80\u00b0C, estes \u00edmanes podem sofrer uma desmagnetiza\u00e7\u00e3o que pode ir de ligeira a permanente.<\/p>\n<h3>Temperatura de Curie<\/h3>\n<p>Os \u00edmanes podem tornar-se n\u00e3o magn\u00e9ticos se a sua temperatura de curie for ultrapassada. Para os \u00edmanes N40 NdFeB, este ponto de temperatura \u00e9 limitado a 350\u00b0C. Isto sublinha a import\u00e2ncia de proteger estes \u00edmanes de temperaturas extremas.<\/p>\n<h3>Remanesc\u00eancia<\/h3>\n<p>A reman\u00eancia quantifica simplesmente as pot\u00eancias magn\u00e9ticas equipadas num \u00edman ap\u00f3s a magnetiza\u00e7\u00e3o. Os \u00edmanes de neod\u00edmio t\u00eam geralmente valores de indu\u00e7\u00e3o magn\u00e9tica elevados e, para os \u00edmanes de grau N40, este valor varia entre 12,6 e 12,9 quilogauss (kG).<\/p>\n<h3>Coercividade<\/h3>\n<p>Os \u00edmanes de neod\u00edmio N40 conseguem manter as suas for\u00e7as magn\u00e9ticas de forma inerente, o que se traduz num elevado valor de coercividade de 11,405 kOe. Isto distingue os \u00edmanes N40 como alguns dos \u00edmanes permanentes mais fortes dispon\u00edveis atualmente.<\/p>\n<h2>Tipos de \u00edmanes de neod\u00edmio N40<\/h2>\n<h3>\u00cdman de barra N40<\/h3>\n<p>O \u00edman em barra N40 assemelha-se a uma barra retangular. Estes \u00edmanes est\u00e3o dispon\u00edveis em diferentes tamanhos e produzem campos magn\u00e9ticos extremamente robustos. Isto torna-os ideais para utiliza\u00e7\u00e3o em agita\u00e7\u00e3o magn\u00e9tica e outros processos industriais.<\/p>\n<figure id=\"attachment_16985\" aria-describedby=\"caption-attachment-16985\" style=\"width: 502px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16985\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/10\/figure-2-N40-bar-magnet.jpg\" alt=\" \u00cdman de barra N40\" width=\"502\" height=\"355\" \/><figcaption id=\"caption-attachment-16985\" class=\"wp-caption-text\">\u00cdman de barra N40<\/figcaption><\/figure>\n<h3>\u00cdmanes cil\u00edndricos N40<\/h3>\n<p>Os \u00edmanes cil\u00edndricos t\u00eam um design tubular e emitem campos magn\u00e9ticos uniformes. Como tal, s\u00e3o frequentemente utilizados em sensores magn\u00e9ticos e rolamentos magn\u00e9ticos.<\/p>\n<figure id=\"attachment_16986\" aria-describedby=\"caption-attachment-16986\" style=\"width: 525px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16986\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/10\/figure-3-N40-cylinder-magnet.jpg\" alt=\"\u00cdman de cilindro N40\" width=\"525\" height=\"366\" \/><figcaption id=\"caption-attachment-16986\" class=\"wp-caption-text\">\u00cdman de cilindro N40<\/figcaption><\/figure>\n<h3>\u00cdmanes de disco N40<\/h3>\n<p>Os \u00edmanes de neod\u00edmio N40 identificam-se pela sua forma esf\u00e9rica e plana. T\u00eam um poder de fixa\u00e7\u00e3o excecional, pelo que s\u00e3o utilizados principalmente em portas de frigor\u00edficos e fechos de j\u00f3ias.<\/p>\n<figure id=\"attachment_16988\" aria-describedby=\"caption-attachment-16988\" style=\"width: 526px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16988\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/10\/figure-4-N40-disc-magnet.jpg\" alt=\"\u00cdman de disco N40\" width=\"526\" height=\"364\" \/><figcaption id=\"caption-attachment-16988\" class=\"wp-caption-text\">\u00cdman de disco N40<\/figcaption><\/figure>\n<h3>\u00cdmanes de anel N40<\/h3>\n<p>Os \u00edmanes em forma de anel t\u00eam a forma de um donut, mas com um vazio no meio. O seu campo magn\u00e9tico \u00e9 gerado em torno do vazio, pelo que s\u00e3o muito utilizados em altifalantes de \u00e1udio e acoplamentos magn\u00e9ticos.<\/p>\n<figure id=\"attachment_16987\" aria-describedby=\"caption-attachment-16987\" style=\"width: 518px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16987\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/10\/figure-5-N40-ring-magnets.jpg\" alt=\"\u00cdmanes de anel N40\" width=\"518\" height=\"353\" \/><figcaption id=\"caption-attachment-16987\" class=\"wp-caption-text\">\u00cdmanes de anel N40<\/figcaption><\/figure>\n<h3>Bolas magn\u00e9ticas N40<\/h3>\n<p>Estes tipos de \u00edmanes t\u00eam uma forma redonda, tal como uma bola. Existem em tamanhos compactos e s\u00e3o extremamente fortes. Os \u00edmanes esf\u00e9ricos de neod\u00edmio N40 s\u00e3o ideais para fazer brinquedos e outros projectos criativos.<\/p>\n<figure id=\"attachment_16989\" aria-describedby=\"caption-attachment-16989\" style=\"width: 522px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-16989\" src=\"https:\/\/bemagnet.com\/wp-content\/uploads\/2023\/10\/figure-6-N40-Magnetic-balls.jpg\" alt=\"Esferas magn\u00e9ticas N40\" width=\"522\" height=\"362\" \/><figcaption id=\"caption-attachment-16989\" class=\"wp-caption-text\">Esferas magn\u00e9ticas N40<\/figcaption><\/figure>\n<p>Outros tipos de \u00edmanes N40 incluem<\/p>\n<ul>\n<li>Cubos magn\u00e9ticos N40.<\/li>\n<li>\u00cdmanes de bloco N40.<\/li>\n<li>\u00cdmanes N40 de rebaixamento.<\/li>\n<li>\u00cdmanes em ferradura N40.<\/li>\n<\/ul>\n<h2>Compara\u00e7\u00e3o dos \u00edmanes N40 com outros tipos de \u00edmanes NdFeB<\/h2>\n<p>Os \u00edmanes NdFeB s\u00e3o normalmente fabricados em diferentes graus para satisfazer suficientemente as exig\u00eancias distintas de aplica\u00e7\u00f5es \u00fanicas. Estes graus baseiam-se na for\u00e7a magn\u00e9tica e s\u00e3o frequentemente indicados pela letra N seguida de um n\u00famero. O n\u00famero representa a pot\u00eancia magn\u00e9tica. No caso dos \u00edmanes de neod\u00edmio, os graus magn\u00e9ticos dispon\u00edveis no mercado variam entre N35 e N55.<\/p>\n<p>O aumento do n\u00famero N sugere um aumento da for\u00e7a magn\u00e9tica, da coercividade e da reman\u00eancia. Por exemplo, os \u00edmanes N40 apresentam um valor BHmax mais elevado (40 MGOe) do que os \u00edmanes N35 com 35 MGOe. No entanto, a sua for\u00e7a magn\u00e9tica ser\u00e1 menor quando comparada com a dos \u00edmanes NdFeB N55.<\/p>\n<h2>Porque \u00e9 que os \u00edmanes de neod\u00edmio N40 necessitam de revestimento<\/h2>\n<p>Depois de os \u00edmanes de neod\u00edmio N40 serem magnetizados durante a produ\u00e7\u00e3o, s\u00e3o frequentemente submetidos a um tratamento adicional. Este \u00e9 normalmente conhecido como tratamento de superf\u00edcie e envolve a cobertura dos \u00edmanes com um revestimento anti-corrosivo. Os revestimentos podem ser feitos de v\u00e1rios materiais, no entanto, as subst\u00e2ncias mais utilizadas s\u00e3o o n\u00edquel, o zinco e a resina ep\u00f3xi. O revestimento n\u00e3o s\u00f3 ajuda a evitar a corros\u00e3o e a oxida\u00e7\u00e3o, como tamb\u00e9m \u00e9 fundamental:<\/p>\n<ul>\n<li>Melhorar a durabilidade<\/li>\n<li>Resist\u00eancia a temperaturas elevadas<\/li>\n<li>Minimizar a fric\u00e7\u00e3o<\/li>\n<li>Melhorar a seguran\u00e7a do manuseamento<\/li>\n<\/ul>\n<h2>Aplica\u00e7\u00f5es comuns dos \u00edmanes N40<\/h2>\n<p>Os \u00edmanes N40 s\u00e3o amplamente utilizados em v\u00e1rios campos gra\u00e7as \u00e0s suas not\u00e1veis for\u00e7as magn\u00e9ticas e \u00e0 sua diversidade. Aqui est\u00e3o algumas das suas aplica\u00e7\u00f5es mais comuns:<\/p>\n<ul>\n<li>Brinquedos magn\u00e9ticos.<\/li>\n<li>Rolamentos magn\u00e9ticos.<\/li>\n<li>Turbinas e\u00f3licas.<\/li>\n<li>Fechos magn\u00e9ticos para portas.<\/li>\n<li>Sensores magn\u00e9ticos.<\/li>\n<li>Levita\u00e7\u00e3o magn\u00e9tica.<\/li>\n<li><\/li>\n<li>Fixa\u00e7\u00e3o magn\u00e9tica.<\/li>\n<li>Separa\u00e7\u00e3o magn\u00e9tica.<\/li>\n<li>Fechos magn\u00e9ticos para j\u00f3ias.<\/li>\n<li>Motores el\u00e9ctricos.<\/li>\n<li>Separadores magn\u00e9ticos.<\/li>\n<li>Agitadores magn\u00e9ticos.<\/li>\n<\/ul>\n<p>Com uma for\u00e7a magn\u00e9tica incompar\u00e1vel e uma longa vida \u00fatil, os \u00edmanes de neod\u00edmio N40 s\u00e3o a escolha certa para muitas ind\u00fastrias. Eles provaram ser eficazes quando usados para fazer brinquedos e at\u00e9 mesmo quando usados em ind\u00fastrias para conseguir a separa\u00e7\u00e3o magn\u00e9tica. Al\u00e9m disso, prev\u00ea-se que s\u00f3 melhorar\u00e3o com a incorpora\u00e7\u00e3o de novas tecnologias de fabrico.<\/p>","protected":false},"excerpt":{"rendered":"<p>N40 neodymium magnets are distinct rare earth magnets graded based on their maximum energy product. This classification of neodymium magnets boasts a BHmax of 40 MGOe, which makes them some of the sturdiest permanent magnets. Advantages of N40 Magnet N40 magnets offer numerous advantages compared to other grades of NdFeB magnets. Here are the most [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16990,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","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":"","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":"set","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-16983","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>N40 Neodymium Magnets: A Comprehensive Guide - 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\/pt\/imanes-n40\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"N40 Neodymium Magnets: A Comprehensive Guide - Dailymag\" \/>\n<meta property=\"og:description\" content=\"N40 neodymium magnets are distinct rare earth magnets graded based on their maximum energy product. This classification of neodymium magnets boasts a BHmax of 40 MGOe, which makes them some of the sturdiest permanent magnets. Advantages of N40 Magnet N40 magnets offer numerous advantages compared to other grades of NdFeB magnets. 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