{"id":3940,"date":"2021-06-28T09:15:44","date_gmt":"2021-06-28T08:15:44","guid":{"rendered":"https:\/\/www.first4magnets.com\/blog\/?p=3940"},"modified":"2024-09-26T09:01:39","modified_gmt":"2024-09-26T09:01:39","slug":"how-are-neodymium-magnets-made","status":"publish","type":"post","link":"https:\/\/www.first4magnets.com\/blog\/how-are-neodymium-magnets-made\/","title":{"rendered":"How are Neodymium magnets made?"},"content":{"rendered":"\n
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Neodymium magnets are\ntechnological marvels and the process for creating them is sophisticated and\ndelicate.<\/p>\n\n\n\n

The main ingredients of a neodymium magnet are neodymium itself, iron, and boron; the chemical compound known as NdFeb. The exact ingredients depend on the grade or strength of magnet being produced. <\/p>\n\n\n\n

However, the production process for different strength magnets sees the same size different stages required to produce a neodymium magnet.<\/p>\n\n\n\n

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Step 1 – The Mix<\/strong><\/p>\n\n\n\n

Firstly, all the elements to make the chosen grade of magnet are placed into a vacuum induction furnace, heated and melted to form the alloy material. <\/p>\n\n\n\n

This mixture is then cooled to form ingots before being ground into tiny grains in a jet mill. Each grain is typically only three microns in size, smaller than a red blood cell.<\/p>\n<\/div>\n\n\n\n

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Step 2 – Pressed<\/strong><\/p>\n\n\n\n

The super-fine powder is then pressed in a mould and at the same time magnetic energy is applied to the mould. <\/p>\n\n\n\n

The magnetism comes from a coil of wire that acts like a magnet when electrical current is passed through it. <\/p>\n\n\n\n

As the mixture is pressed, the direction of magnetism is locked in! When the particle structure of the magnet matches the direction of magnetism, this is called an anisotropic magnet.<\/p>\n<\/div>\n<\/div>\n\n\n\n

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Step 3 – Sintered<\/strong><\/p>\n\n\n\n

This isn\u2019t the end of the process, instead, at this point the magnetised material is demagnetised and will be re-magnetised later in the process. <\/p>\n\n\n\n

At this stage the material would be far too soft and crumbly to be useful. <\/p>\n\n\n\n

The next step is for the material to be heated, almost until melting point in a process called sintering which makes the powdered magnet particles fuse together.<\/p>\n\n\n\n

This process takes place in an oxygen free, inert environment.<\/p>\n<\/div>\n\n\n\n

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Step 4 – Cooled & Machined<\/strong><\/p>\n\n\n\n

Almost there, the heated material gets rapidly cooled using a technique known as quenching. <\/p>\n\n\n\n

This rapid cooling process minimises areas of poor magnetism and maximises performance. <\/p>\n\n\n\n

This is the stage when the raw magnets are machined into their desired shape, however, because they are so hard diamond plated cutting tools are needed! <\/p>\n<\/div>\n<\/div>\n\n\n\n

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Step 5 – A coat for all applications<\/strong><\/p>\n\n\n\n

The last step before the material is re-magnetised is vital. Because neodymium magnets are so hard, making them prone to breaking and chipping, they must be coated, cleaned, dried and plated. <\/p>\n\n\n\n

There are many different types of coating that are used with neodymium magnets, the most common being a nickel-copper-nickel mixture but they can be coated in other metals and even rubber or PTFE.<\/p>\n<\/div>\n\n\n\n

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Step 6 – Magnetised<\/strong><\/p>\n\n\n\n

Once plated, the finished material is re-magnetised by placing it inside a coil, which, when electric current is passed through it produces a magnetic field three times stronger than the required strength of the magnet. <\/p>\n\n\n\n

This is such a powerful process that if the magnet is not held in place it can be flung from the coil like a bullet.<\/p>\n<\/div>\n<\/div>\n\n\n\n

SHOP FULL RANGE OF NEODYMIUM MAGNETS<\/a><\/div>\n\n\n\n

Finally, every magnet\nsold by FIRST4MAGNETS is quality assured before it is dispatched to the\ncustomer to be used in hundreds of different applications.<\/p>\n\n\n\n

If you have any questions or queries then be sure to get in touch with our team of experts who are available on 0845 519 4701 or sales@magnetexpert.com<\/a> and are always happy to help. <\/p>\n","protected":false},"excerpt":{"rendered":"

Neodymium magnets are technological marvels and the process for creating them is sophisticated and delicate. The main ingredients of a […]<\/p>\n","protected":false},"author":5,"featured_media":11099,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"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":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","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":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","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-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-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-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-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-gradient":""}},"footnotes":""},"categories":[270],"tags":[254,271,5,8,272,49,37,165],"class_list":["post-3940","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-are-magnets-made","tag-how-are-magnets-made","tag-how-are-neodymim-magnets-made","tag-magnet","tag-magnets","tag-neodymium","tag-neodymium-magnets","tag-science","tag-science-experiments"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/posts\/3940","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/comments?post=3940"}],"version-history":[{"count":1,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/posts\/3940\/revisions"}],"predecessor-version":[{"id":11100,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/posts\/3940\/revisions\/11100"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/media\/11099"}],"wp:attachment":[{"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/media?parent=3940"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/categories?post=3940"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.first4magnets.com\/blog\/wp-json\/wp\/v2\/tags?post=3940"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}