{"id":4009,"date":"2026-05-19T09:51:28","date_gmt":"2026-05-19T09:51:28","guid":{"rendered":"https:\/\/nexalmagnetics.com\/?p=4009"},"modified":"2026-05-26T11:41:35","modified_gmt":"2026-05-26T11:41:35","slug":"gbd-technology-to-achieve-high-coercivity","status":"publish","type":"post","link":"https:\/\/nexalmagnetics.com\/zh\/gbd-technology-to-achieve-high-coercivity\/","title":{"rendered":"GBD\u6280\u672f\uff1aNEXAL \u5982\u4f55\u5728\u4e0d\u4ea7\u751f\u9ad8\u6602\u7a00\u571f\u6210\u672c\u7684\u60c5\u51b5\u4e0b\u5b9e\u73b0\u673a\u5668\u4eba\u5173\u8282\u7535\u673a\u7684\u9ad8\u77eb\u987d\u529b"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"4009\" class=\"elementor elementor-4009\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b09f1a4 e-flex e-con-boxed e-con e-parent\" data-id=\"b09f1a4\" data-element_type=\"container\" data-e-type=\"container\" id=\"SingleCase\" 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fill-rule=\"evenodd\" fill=\"#000000\" fill-opacity=\"1\"><\/path><\/g><\/svg>\t\t\t<\/a>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-835cfc0 elementor-widget elementor-widget-heading\" data-id=\"835cfc0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/nexalmagnetics.com\/zh\/market\/\">Back<\/a><\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1a1a51b e-con-full e-flex e-con e-child\" data-id=\"1a1a51b\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-e6a2359 e-con-full e-flex e-con e-child\" data-id=\"e6a2359\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7ddf715 elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"7ddf715\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">GBD Technology: How NEXAL Achieves High Coercivity for Robotic Joint Motors Without High Heavy-Rare-Earth Costs<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-98e3e14 elementor-widget elementor-widget-heading\" data-id=\"98e3e14\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><i>Quick Summary<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-feac8f3 elementor-widget elementor-widget-text-editor\" data-id=\"feac8f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"8\">For robotic joint motors, maximizing torque density requires high coercivity (<span class=\"math-inline\" data-math=\"H_{cj}\" data-index-in-node=\"102\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">H<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">c<\/span><span class=\"mord mathnormal mtight\">j<\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>), which usually means buying expensive heavy rare earth (HRE) magnets. Nexal\u2019s flexible <b data-path-to-node=\"9,0\" data-index-in-node=\"197\">Grain Boundary Diffusion (GBD)<\/b> technology strategically infuses Dysprosium (Dy) or Terbium (Tb) only where it matters, slashing material costs while maintaining top-tier <span class=\"math-inline\" data-math=\"B_r\" data-index-in-node=\"367\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">B<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">r<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>performance for growing robot OEMs.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c0b646 elementor-widget elementor-widget-image\" data-id=\"4c0b646\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1680\" height=\"848\" src=\"https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD.jpg\" class=\"attachment-full size-full wp-image-4032\" alt=\"\" srcset=\"https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD.jpg 1680w, https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD-300x151.jpg 300w, https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD-1024x517.jpg 1024w, https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD-768x388.jpg 768w, https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD-1536x775.jpg 1536w, https:\/\/nexalmagnetics.com\/wp-content\/uploads\/2026\/05\/GBD-18x9.jpg 18w\" sizes=\"(max-width: 1680px) 100vw, 1680px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5c980f elementor-widget elementor-widget-heading\" data-id=\"e5c980f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><i>1. The Robotic Joint Dilemma: Coercivity vs. Remanence<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a6938b9 elementor-widget elementor-widget-text-editor\" data-id=\"a6938b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"12\">Robotic actuators and cobot joints operate under extreme current spikes, demanding magnets with exceptional intrinsic coercivity (<span class=\"math-inline\" data-math=\"H_{cj}\" data-index-in-node=\"130\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">H<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\"><span class=\"mord mathnormal mtight\">c<\/span><span class=\"mord mathnormal mtight\">j<\/span><\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) to prevent reverse-field demagnetization.<\/p><p data-path-to-node=\"13\">Traditionally, adding Dysprosium (Dy) to the entire chemical melt was the only option. However, this old method triggers two major issues:<\/p><ul data-path-to-node=\"14\"><li><p data-path-to-node=\"14,0,0\"><b data-path-to-node=\"14,0,0\" data-index-in-node=\"0\">The Remanence (<span class=\"math-inline\" data-math=\"B_r\" data-index-in-node=\"15\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">B<\/span><span class=\"msupsub\"><span class=\"vlist-t vlist-t2\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mathnormal mtight\">r<\/span><\/span><\/span><\/span><span class=\"vlist-s\">\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) Drop:<\/b> Alloying HRE globally decreases the residual flux density, meaning your motor loses torque density.<\/p><\/li><li><p data-path-to-node=\"14,1,0\"><b data-path-to-node=\"14,1,0\" data-index-in-node=\"0\">The Cost Trap:<\/b> Heavy rare earths are volatile commodity monopolies. For SME robotics startups, standard HRE magnets make scaling cost-prohibitive.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f03192f elementor-widget elementor-widget-heading\" data-id=\"f03192f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><i>2. The GBD Mechanism: Precision Layering<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bca3528 elementor-widget elementor-widget-text-editor\" data-id=\"bca3528\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"17\">Instead of wasting expensive Dy\/Tb in the core of the magnet where it does nothing to combat external reverse fields, Nexal utilizes <b data-path-to-node=\"17\" data-index-in-node=\"133\">Grain Boundary Diffusion (GBD)<\/b>.<\/p><p data-path-to-node=\"18\">We apply a micro-coating of heavy rare earths to the sintered magnet surface and use precise thermal processing to diffuse the atoms strictly along the boundary lines of the NdFeB crystal grains.<\/p><pre data-path-to-node=\"18\"><span style=\"color: #0e55ac;\"><em>[Standard Alloy Magnet: Dy Wasted in Core] \u2794 Low Br, Extreme Price \u274c [Nexal GBD Magnet: Dy Focused on Boundaries] \u2794 High Br, Optimized Cost<\/em> <\/span><\/pre>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cda0629 elementor-widget elementor-widget-heading\" data-id=\"cda0629\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><i>3. Data Comparison: Standard vs. GBD Performance<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f895bc elementor-widget elementor-widget-text-editor\" data-id=\"7f895bc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<table data-path-to-node=\"22\"><thead><tr><td><strong>Material Profile<\/strong><\/td><td><strong>Remanence (Br\u200b)<\/strong><\/td><td><strong>Coercivity (Hcj\u200b)<\/strong><\/td><td><strong>Heavy Rare Earth (HRE) Consumed<\/strong><\/td><td><strong>Cost Impact for SME<\/strong><\/td><\/tr><\/thead><tbody><tr><td><span data-path-to-node=\"22,1,0,0\"><b data-path-to-node=\"22,1,0,0\" data-index-in-node=\"0\">Traditional 42UH<\/b><\/span><\/td><td><span data-path-to-node=\"22,1,1,0\">1.28 &#8211; 1.33 T<\/span><\/td><td><span data-path-to-node=\"22,1,2,0\"><span class=\"math-inline\" data-math=\"\\ge 21 MGOe\" data-index-in-node=\"0\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<\/span><\/span><span class=\"base\"><span class=\"mord\">21<\/span><span class=\"mord mathnormal\">MGO<\/span><span class=\"mord mathnormal\">e<\/span><\/span><\/span><\/span><\/span><\/span><\/td><td><span data-path-to-node=\"22,1,3,0\">100% Volume Alloyed<\/span><\/td><td><span data-path-to-node=\"22,1,4,0\">High &amp; Volatile<\/span><\/td><\/tr><tr><td><span data-path-to-node=\"22,2,0,0\"><b data-path-to-node=\"22,2,0,0\" data-index-in-node=\"0\">Nexal 42SH + GBD<\/b><\/span><\/td><td><span style=\"color: #0e55ac;\"><strong>1.32 &#8211; 1.37 T<\/strong><\/span><\/td><td><span style=\"color: #0e55ac;\"><strong><span class=\"math-inline\" data-math=\"\\ge 21 MGOe\" data-index-in-node=\"0\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mrel\">\u2265<span class=\"mord\">25<\/span><span class=\"mord mathnormal\">MGO<\/span><span class=\"mord mathnormal\">e<\/span><\/span><\/span><\/span><\/span><\/span><\/strong><\/span><\/td><td><span style=\"color: #0e55ac;\"><strong>Reduced by 60-70%<\/strong><\/span><\/td><td><span style=\"color: #0e55ac;\"><strong>Predictable &amp; Stable<\/strong><\/span><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b61c5b2 elementor-widget elementor-widget-heading\" data-id=\"b61c5b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><i>4. The Nexal Advantage: Agility for Growing Robotics Startups<\/i><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64fe804 elementor-widget elementor-widget-text-editor\" data-id=\"64fe804\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"25\">Tier-1 magnetic giants refuse to run custom GBD batches for orders under a few tons. Nexal breaks this barrier:<\/p><ul data-path-to-node=\"26\"><li><p data-path-to-node=\"26,0,0\"><b data-path-to-node=\"26,0,0\" data-index-in-node=\"0\">Zero-MOQ Prototyping:<\/b> We configure our GBD diffusion curves specifically for your joint motor\u2019s specific thermal signature, even for small-batch test runs.<\/p><\/li><li><p data-path-to-node=\"26,1,0\"><b data-path-to-node=\"26,1,0\" data-index-in-node=\"0\">Custom Coating Integration:<\/b> We combine GBD with advanced surface treatments (such as <b data-path-to-node=\"26,1,0\" data-index-in-node=\"85\">Black Epoxy<\/b> or <b data-path-to-node=\"26,1,0\" data-index-in-node=\"100\">Chemically Bonded NiCuNi<\/b>) to match your precise environmental requirements.<\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a2d853d elementor-widget elementor-widget-text-editor\" data-id=\"a2d853d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><b data-path-to-node=\"28\" data-index-in-node=\"3\">Designing a next-gen cobot joint or humanoid actuator?<\/b> Don&#8217;t let material costs stall your prototype.<\/p><p>Contact Nexal&#8217;s GBD Team \u00a0for a cost-optimized material simulation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9ce5357 elementor-mobile-align-justify elementor-align-left elementor-widget elementor-widget-button\" data-id=\"9ce5357\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/nexalmagnetics.com\/zh\/contact\/\" id=\"back-to-applications\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contact Us<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Back Quick Summary For robotic joint motors, maximizing torque density requires high coercivity (Hcj\u200b), which usually means buying expensive heavy rare earth (HRE) magnets. Nexal\u2019s flexible Grain Boundary Diffusion (GBD) technology strategically infuses Dysprosium (Dy) or Terbium (Tb) only where it matters, slashing material costs while maintaining top-tier Br\u200bperformance for growing robot OEMs. 1. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":280,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4009","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/posts\/4009","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/comments?post=4009"}],"version-history":[{"count":10,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/posts\/4009\/revisions"}],"predecessor-version":[{"id":4037,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/posts\/4009\/revisions\/4037"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/media\/280"}],"wp:attachment":[{"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/media?parent=4009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/categories?post=4009"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nexalmagnetics.com\/zh\/wp-json\/wp\/v2\/tags?post=4009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}