{"id":1641,"date":"2024-12-31T09:33:09","date_gmt":"2024-12-31T01:33:09","guid":{"rendered":"https:\/\/dongguanpegaintmagnet.com\/?p=1641"},"modified":"2024-12-31T10:15:33","modified_gmt":"2024-12-31T02:15:33","slug":"bonded-ndfeb-magnets-vs-sintered-ndfeb-magnets","status":"publish","type":"post","link":"https:\/\/dongguanpegaintmagnet.com\/fr\/bonded-ndfeb-magnets-vs-sintered-ndfeb-magnets\/","title":{"rendered":"Bonded NdFeB Magnets vs Sintered NdFeB Magnets"},"content":{"rendered":"

The neodymium magnet<\/a>, also known as the NdFeB magnet, is a kind of artificial permanent magnet<\/a>, also the most powerful permanent magnet to date. Aimants NdFeB <\/a>can attract objects up to 640 times their weight. If divided by shape, the NdFeB magnets can be divided into round magnets, ring magnets, rectangular magnets, square magnets, irregular magnets, etc. If divided according to their production process, NdFeB magnets can be divided into bonded NdFeB magnets and sintered NdFeB magnets. Bonded NdFeB magnets vs sintered NdFeB magnets, what’s the difference between them? In this article, we will try to find the differences between bonded NdFeB magnets and sintered NdFeB magnets.<\/p>\n\n\n\n

Bonded NdFeB magnets and sintered NdFeB magnets are both types of neodymium magnets, but they differ significantly in their manufacturing processes, properties, and applications. Here\u2019s a detailed comparison:<\/p>\n\n\n\n

    \n
  1. Manufacturing Process
    \u2022 Bonded NdFeB Magnets:
    \u2022 Made by mixing neodymium, iron, and boron powder with a binding material (e.g., epoxy resin).
    \u2022 The mixture is then pressed or injection-molded into the desired shape.
    \u2022 No sintering is involved; the material is cured at low temperatures.
    \u2022 Sintered NdFeB Magnets:
    \u2022 Produced by compressing neodymium, iron, and boron powder into a mold.
    \u2022 The compressed material is heated (sintered) at high temperatures to fuse the particles.
    \u2022 The resulting magnets are machined into the final shape.<\/li>\n\n\n\n
  2. Magnetic Properties
    \u2022 Bonded Magnets:
    \u2022 Lower magnetic strength compared to sintered magnets.
    \u2022 Offers isotropic properties (magnetized in any direction).
    \u2022 Typical magnetic energy product: 8-12 MGOe.
    \u2022 Sintered Magnets:
    \u2022 Higher magnetic strength, making them the strongest permanent magnets.
    \u2022 Anisotropic properties (magnetized in a specific direction).
    \u2022 Typical magnetic energy product: 28-52 MGOe.<\/li>\n\n\n\n
  3. Shape and Size
    \u2022 Bonded Magnets:
    \u2022 Easy to mold into complex shapes and thin-walled structures.
    \u2022 Suitable for intricate designs that are difficult or impossible to machine.
    \u2022 Sintered Magnets:
    \u2022 Limited to simpler shapes unless further machining is done.
    \u2022 Fragile and prone to cracking during machining.<\/li>\n\n\n\n
  4. Mechanical Properties
    \u2022 Bonded Magnets:
    \u2022 More mechanically stable and less brittle than sintered magnets.
    \u2022 Resistant to chipping and cracking.
    \u2022 Sintered Magnets:
    \u2022 Brittle and prone to breaking under mechanical stress.<\/li>\n\n\n\n
  5. Temperature Resistance
    \u2022 Bonded Magnets:
    \u2022 Slightly lower resistance to high temperatures (depends on the binder material).
    \u2022 Typically suitable for applications below 150\u00b0C.
    \u2022 Sintered Magnets:
    \u2022 Higher resistance to demagnetization at elevated temperatures.
    \u2022 Specialized grades can operate at temperatures above 200\u00b0C.<\/li>\n\n\n\n
  6. Cost
    \u2022 Bonded Magnets:
    \u2022 Generally cheaper to produce due to simpler manufacturing and lower raw material requirements.
    \u2022 Lower material utilization but higher flexibility in production.
    \u2022 Sintered Magnets:
    \u2022 Higher cost due to intensive manufacturing processes and greater material usage.
    \u2022 Economical only in larger production scales.<\/li>\n\n\n\n
  7. Applications
    \u2022 Bonded Magnets:
    \u2022 Sensors, small motors, office equipment, and consumer electronics.
    \u2022 Applications requiring precise shapes and moderate magnetic strength.
    \u2022 Ideal for high-volume, low-cost production.
    \u2022 Sintered Magnets:
    \u2022 Electric vehicle motors, wind turbines, magnetic separators, and industrial machinery.
    \u2022 Applications requiring maximum magnetic strength and durability.<\/li>\n<\/ol>\n\n\n\n

    Bonded NdFeB Magnets<\/strong>
    A bonded NdFeB magnet, composed of Nd2Fe14B, is a synthetic magnet. Bonded NdFeB magnets are magnets made of rapidly quenched NdFeB magnetic powder and binder by “compression molding” or “injection molding”. Bonded NdFeB magnets have high dimensional accuracy, can be made into magnetic components with relatively complex shapes, and have the characteristics of one-time molding and multi-polar orientation. The bonded NdFeB magnets have high mechanical strength and can be formed at one time with other supporting components during forming. Thanks to their low cost, high dimensional accuracy, large degree of freedom in shape, good mechanical strength, and light specific gravity, bonded NdFeB magnets are widely used in office automation equipment, Denso machinery, audiovisual equipment, instrumentation, small motors and metering machinery, mobile phones, CD-ROM, DVD-ROM drive motors, hard disk spindle motors HDD, other micro special DC motors and automated instruments and other fields. Their annual growth rate has reached 35%. Compared with sintered NdFeB magnets, bonded NdFeB magnets can be formed at one time without secondary processing, and can be made into various shapes of complex magnets, which is also incomparable to sintered magnets. With the help of the bonded NdFeB magnets, people can greatly reduce the size and weight of the motor.<\/p>\n\n\n\n

    Sintered NdFeB Magnets<\/strong><\/h2>\n\n\n\n

    The sintered NdFeB magnet is made by powder metallurgy process. First, the smelted alloy needs to be powdered and pressed into a compact in a magnetic field, and then the compact is sintered in inert gas or vacuum to achieve densification. In general, only the magnet blank can be produced after sintering, and then it can be turned into magnets of various shapes through mechanical processing (such as wire cutting, slicing, grinding, etc.). Sintered NdFeB permanent magnets are widely used in electronics, electrical machinery, medical equipment, toys, packaging, hardware machinery, aerospace, and other fields. The more common ones are permanent magnet motors, speakers, magnetic separators, computer disk drives, and magnetic resonance imaging equipment instruments. Compared with bonded NdFeB magnets, sintered NdFeB magnets have high processing costs, large losses during processing, and poor dimensional accuracy. But its advantage is also obvious. At present, the (BH) max of the sintered NdFeB magnet can reach more than 50M, while the bonded magnet is generally below 10M.<\/p>\n\n\n\n

    Conclusion<\/strong>:<\/p>\n\n\n\n

    Feature Bonded NdFeB Magnets Sintered NdFeB Magnets
    Manufacturing Bonding with resin, molding Powder sintering, machining
    Magnetic Strength Moderate Very high
    Shape\/Size Complex, small designs Simple, larger sizes
    Durability Tough, less brittle Brittle
    Temperature Moderate resistance High resistance
    Cost Lower Higher
    Applications Electronics, sensors Motors, heavy industry<\/p>\n\n\n\n

    Both types of magnets are essential in modern industries, with the choice depending on the specific requirements of the application.<\/p>\n\n\n\n

    <\/p>","protected":false},"excerpt":{"rendered":"

    The neodymium magnet, also known as the NdFeB magnet, is a kind of artificial permanent magnet, also the most powerful permanent magnet to date. NdFeB magnets can attract objects up to 640 times their weight. If divided by shape, the NdFeB magnets can be divided into round magnets, ring magnets, rectangular magnets, square magnets, irregular…<\/p>","protected":false},"author":1,"featured_media":1642,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[1],"tags":[167,151,168,166],"_links":{"self":[{"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/posts\/1641"}],"collection":[{"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/comments?post=1641"}],"version-history":[{"count":0,"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/posts\/1641\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/media\/1642"}],"wp:attachment":[{"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/media?parent=1641"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/categories?post=1641"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dongguanpegaintmagnet.com\/fr\/wp-json\/wp\/v2\/tags?post=1641"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}