{"id":956,"date":"2024-05-23T09:06:08","date_gmt":"2024-05-23T00:06:08","guid":{"rendered":"http:\/\/daido-electronics.co.jp\/english\/?page_id=956"},"modified":"2024-05-23T09:26:00","modified_gmt":"2024-05-23T00:26:00","slug":"radially-oriented-anisotropic-nd-fe-b-ring-magnets-neoquench-dr","status":"publish","type":"page","link":"http:\/\/daido-electronics.co.jp\/english\/radially-oriented-anisotropic-nd-fe-b-ring-magnets-neoquench-dr\/","title":{"rendered":"Radially oriented, anisotropic Nd-Fe-B ring magnets (NEOQUENCH-DR)"},"content":{"rendered":"<p>Daido has developed a unique hot extrusion process to produce radially oriented anisotropic Nd-Fe-B ring magnets, NEOQUENCH-DR.<\/p>\n<ul class=\"list\">\n<li>Unlike sintering, this process does not rely on a magnetic field for radial orientation.<\/li>\n<li>Our process starts with raw material powders manufactured by rapid quenching of the prescribed alloys into nanocrystalline flakes.<\/li>\n<li>These flakes are hot pressed to the theoretical density and then hot extruded to ring-shaped magnets.<\/li>\n<\/ul>\n<p>During this advanced hot extrusion process, randomly oriented crystal grains go through preferential grain growth and rotation.<\/p>\n<p>This results in the full-density, nanocrystalline structure with the highest level of radial orientation.<\/p>\n<p>Although the basic magnetic properties (Br, Hc, and (BH)max) are similar to sintered Nd-Fe-B, our unique process gives rise to several remarkable features listed below.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-957\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01-2.jpg\" alt=\"\" width=\"297\" height=\"269\" \/><\/p>\n<h2>Features of NEOQUENCH-DR<\/h2>\n<ol class=\"last-para\">\n<li>Highest energy product of 240 \uff5e 400 kJ\/m<sup>3<\/sup>\u00a0(30 \uff5e 40 MGOe) in truly radial direction.<\/li>\n<li>Full rings with a wide range of diameters (min. OD 6 mm -) and lengths (max. 80 mm) for easy assembly.<\/li>\n<li>Various magnetization patterns possible (multi-pole to uni-pole, various skew angles) by the design of magnetizing fixtures.<\/li>\n<li>Precise magnetization waveform control (such as rectangular, trapezoidal, sinusoidal) for high power or low cogging.<\/li>\n<li>High heat resistant grades (up to 180 deg.C) available.<\/li>\n<li>Inherently better corrosion resistance due to the absence of internal porosity.<\/li>\n<\/ol>\n<h3>Applications of NEOQUENCH-DR<\/h3>\n<p>&#8211; EPS (Electric Power Steering) motors: Combined with controlled magnetization waveforms, NEOQUENCH-DR can realize quiet and smooth rotation, giving rise to a natural feeling of steering an automobile.<\/p>\n<p>Servomotors: High power and low cogging, quiet and smooth rotation, ideal for AC\/DC servomotors used in industrial robots requiring quick and accurate movements.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-958\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02_l-1.jpg\" alt=\"\" width=\"410\" height=\"359\" srcset=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02_l-1.jpg 410w, http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02_l-1-300x263.jpg 300w\" sizes=\"auto, (max-width: 410px) 100vw, 410px\" \/><\/p>\n<p>Electrical power steering motor<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-959\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image03_l-1.jpg\" alt=\"\" width=\"610\" height=\"385\" srcset=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image03_l-1.jpg 610w, http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image03_l-1-300x189.jpg 300w\" sizes=\"auto, (max-width: 610px) 100vw, 610px\" \/><\/p>\n<p>AC servo-motor<\/p>\n<h3>Manufacturing process of NEOQUENCH-DR<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-960\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image04.gif\" alt=\"\" width=\"450\" height=\"321\" \/><\/p>\n<p>Realizing close theoritical density and high radial orientation ratio by hot extrusion technology keeping miro structure of grain size.<\/p>\n<h2>Feature of NEOQUENCH-DR &amp; detail data<\/h2>\n<h3>Material properties of radially oriented, anisotropic Nd-Fe-B ring magnets (NEOQUENCH-DR)<\/h3>\n<h4>Magnetic properties<\/h4>\n<table class=\"last-para\" summary=\"Magnetic property\">\n<tbody>\n<tr>\n<th colspan=\"2\"><\/th>\n<th width=\"156\">ND-31HR<\/th>\n<th width=\"155\">ND-31SHR<\/th>\n<th width=\"155\">ND-35HR<\/th>\n<\/tr>\n<tr>\n<th rowspan=\"2\" width=\"26%\">Remanence, Br<\/th>\n<th width=\"9%\">(T)<\/th>\n<td>1.14 \uff5e 1.22<\/td>\n<td>1.08 \uff5e 1.18<\/td>\n<td>1.22 \uff5e 1.28<\/td>\n<\/tr>\n<tr>\n<th>(kG)<\/th>\n<td>(11.4 \uff5e 12.2)<\/td>\n<td>(10.8 \uff5e 11.8)<\/td>\n<td>(12.2 \uff5e 12.8)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Coercivity,H<sub>CB<\/sub><\/th>\n<th>(kA\/m)<\/th>\n<td>830 \uff5e 890<\/td>\n<td>810 \uff5e 880<\/td>\n<td>870 \uff5e 940<\/td>\n<\/tr>\n<tr>\n<th>(kOe)<\/th>\n<td>(10.4 \uff5e 11.2)<\/td>\n<td>(10.2 \uff5e 11.1)<\/td>\n<td>(10.9 \uff5e 11.8)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Coercivity,H<sub>CJ<\/sub><\/th>\n<th>(kA\/m)<\/th>\n<td>1110 \uff5e 1430<\/td>\n<td>1590 \uff5e 1990<\/td>\n<td>1110 \uff5e 1430<\/td>\n<\/tr>\n<tr>\n<th>(kOe)<\/th>\n<td>(14.0 \uff5e 18.0)<\/td>\n<td>(20.0 \uff5e 25.0)<\/td>\n<td>(14.0 \uff5e 18.0)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Maximum energy product, (BH)max<\/th>\n<th>(kJ\/m<sup>3<\/sup>)<\/th>\n<td>240 \uff5e 270<\/td>\n<td>230 \uff5e 260<\/td>\n<td>270 \uff5e 300<\/td>\n<\/tr>\n<tr>\n<th>(MGOe)<\/th>\n<td>(30.0 \uff5e 34.0)<\/td>\n<td>(29.0 \uff5e 33.0)<\/td>\n<td>(34.0 \uff5e 38.0)<\/td>\n<\/tr>\n<tr>\n<th colspan=\"2\">Recoil permeability<\/th>\n<td>1.05<\/td>\n<td>1.05<\/td>\n<td>1.05<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Required magnetizing magnetic field<\/th>\n<th>(kA\/m)<\/th>\n<td>\u22671990<\/td>\n<td>\u22672390<\/td>\n<td>\u22671990<\/td>\n<\/tr>\n<tr>\n<th>(kOe)<\/th>\n<td>(\u226725)<\/td>\n<td>(\u226730)<\/td>\n<td>(\u226725)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">density<\/th>\n<th>(Mg\/m<sup>3<\/sup>)<\/th>\n<td class=\"middole-position\" rowspan=\"2\">7.6<\/td>\n<td class=\"middole-position\" rowspan=\"2\">7.7<\/td>\n<td class=\"middole-position\" rowspan=\"2\">7.6<\/td>\n<\/tr>\n<tr>\n<th>(g\/cm<sup>3<\/sup>)<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<table summary=\"Magnetic property\">\n<tbody>\n<tr>\n<th colspan=\"2\"><\/th>\n<th width=\"16%\">ND-35SHR<\/th>\n<th width=\"16%\">ND-39R<\/th>\n<th width=\"16%\">ND-39HR<\/th>\n<th width=\"16%\">ND-43R<\/th>\n<\/tr>\n<tr>\n<th rowspan=\"2\" width=\"26%\">Remanence, Br<\/th>\n<th width=\"9%\">(T)<\/th>\n<td>1.22 \uff5e 1.28<\/td>\n<td>1.28 \uff5e 1.32<\/td>\n<td>1.28\uff5e1.32<\/td>\n<td>1.30 \uff5e 1.36<\/td>\n<\/tr>\n<tr>\n<th>(kG)<\/th>\n<td>(12.2 \uff5e 12.8)<\/td>\n<td>(12.8 \uff5e 13.2)<\/td>\n<td>(12.8\uff5e13.2)<\/td>\n<td>(13.0 \uff5e 13.6)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Coercivity,H<sub>CB<\/sub><\/th>\n<th>(kA\/m)<\/th>\n<td>880 \uff5e 950<\/td>\n<td>880 \uff5e 960<\/td>\n<td>928\uff5e960<\/td>\n<td>840 \uff5e 960<\/td>\n<\/tr>\n<tr>\n<th>(kOe)<\/th>\n<td>(11.1 \uff5e 11.9)<\/td>\n<td>(11.1 \uff5e 12.1)<\/td>\n<td>(11.6\uff5e12.1)<\/td>\n<td>(10.5 \uff5e 12.1)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Coercivity,H<sub>CJ<\/sub><\/th>\n<th>(kA\/m)<\/th>\n<td>1430 \uff5e 1800<\/td>\n<td>1040 \uff5e 1280<\/td>\n<td>1110\uff5e1430<\/td>\n<td>900 \uff5e 1160<\/td>\n<\/tr>\n<tr>\n<th>(kOe)<\/th>\n<td>(18.0 \uff5e 22.6)<\/td>\n<td>(13.0 \uff5e 16.0)<\/td>\n<td>(14.0\uff5e18.0)<\/td>\n<td>(11.3 \uff5e 14.6)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Maximum energy product, (BH)max<\/th>\n<th>(kJ\/m<sup>3<\/sup>)<\/th>\n<td>270 \uff5e 300<\/td>\n<td>300 \uff5e 330<\/td>\n<td>300\uff5e330<\/td>\n<td>320 \uff5e 360<\/td>\n<\/tr>\n<tr>\n<th>(MGOe)<\/th>\n<td>(34.0 \uff5e 38.0)<\/td>\n<td>(38.0 \uff5e 42.0)<\/td>\n<td>(38.0\uff5e42.0)<\/td>\n<td>(40.0 \uff5e 45.0)<\/td>\n<\/tr>\n<tr>\n<th colspan=\"2\">Recoil permeability<\/th>\n<td>1.05<\/td>\n<td>1.05<\/td>\n<td>1.05<\/td>\n<td>1.05<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Required magnetizing magnetic field<\/th>\n<th>(kA\/m)<\/th>\n<td>\u22671990<\/td>\n<td>\u22671990<\/td>\n<td>\u22671990<\/td>\n<td>\u22671990<\/td>\n<\/tr>\n<tr>\n<th>(kOe)<\/th>\n<td>(\u226730)<\/td>\n<td>(\u226725)<\/td>\n<td>(25)<\/td>\n<td>(\u226725)<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">density<\/th>\n<th>(Mg\/m<sup>3<\/sup>)<\/th>\n<td class=\"middole-position\" rowspan=\"2\">7.6<\/td>\n<td class=\"middole-position\" rowspan=\"2\">7.6<\/td>\n<td class=\"middole-position\" rowspan=\"2\">7.6<\/td>\n<td class=\"middole-position\" rowspan=\"2\">7.6<\/td>\n<\/tr>\n<tr>\n<th>(g\/cm<sup>3<\/sup>)<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color: #ff0000;\">\u203bThe above properties are not guaranteed for magnets with thick walls. Please consult with us for details.<\/span><\/p>\n<h4>Other properties<\/h4>\n<table class=\"last-para\" summary=\"Other properties\">\n<tbody>\n<tr>\n<th width=\"148\">Temperature coefficient of Br, alpha<\/th>\n<td width=\"149\">%\/\u2103<\/td>\n<td width=\"149\">-0.10<\/td>\n<\/tr>\n<tr>\n<th>Temperature Coefficient of H<sub>CJ<\/sub>, beta<\/th>\n<td>%\/\u2103<\/td>\n<td>-0.50<\/td>\n<\/tr>\n<tr>\n<th>Curie temperature<\/th>\n<td>\u2103<\/td>\n<td>360<\/td>\n<\/tr>\n<tr>\n<th>Specific heat<\/th>\n<td>J\/kg\u2103<\/td>\n<td>550<\/td>\n<\/tr>\n<tr>\n<th>Thermal conductivity<\/th>\n<td>W\/m\u2103<\/td>\n<td>4.80<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"2\">Thermal expansion coefficient (20 ~ 200\u2103)<\/th>\n<td class=\"middole-position\" rowspan=\"2\">\u00d710<sup>-6<\/sup>\/\u2103<\/td>\n<td>1 \uff5e 2(Radial direction)<\/td>\n<\/tr>\n<tr>\n<td>-1 \uff5e 0(Axial direction)<\/td>\n<\/tr>\n<tr>\n<th>Electric resistivity<\/th>\n<td>\u00d710<sup>-8<\/sup>\u03a9m<\/td>\n<td>135<\/td>\n<\/tr>\n<tr>\n<th>Ring crushing strength<\/th>\n<td>MPa<\/td>\n<td>150<\/td>\n<\/tr>\n<tr>\n<th>Young&#8217;s modulus<\/th>\n<td>MPa<\/td>\n<td>152000<\/td>\n<\/tr>\n<tr>\n<th>Bending strength<\/th>\n<td>MPa<\/td>\n<td>200<\/td>\n<\/tr>\n<tr>\n<th>Vickers hardness<\/th>\n<td>Hv<\/td>\n<td>750<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4>Product dimemsions<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-961\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01_l.jpg\" alt=\"\" width=\"448\" height=\"342\" srcset=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01_l.jpg 448w, http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01_l-300x229.jpg 300w\" sizes=\"auto, (max-width: 448px) 100vw, 448px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-962\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02_l-2.gif\" alt=\"\" width=\"448\" height=\"369\" \/><\/p>\n<h2>Magnetic properties of radially oriented, anisotropic Nd-Fe-B ring magnets (NEOQUENCH-DR)<\/h2>\n<h3>Temperature dependence of demagnetization curves<\/h3>\n<h4>ND-31HR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-964\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01_l-2.gif\" alt=\"\" width=\"590\" height=\"540\" \/><\/p>\n<h4>ND-31SHR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-965\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02_l-3.gif\" alt=\"\" width=\"590\" height=\"540\" \/><\/p>\n<h4>ND-35HR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-966\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image03_l-2.gif\" alt=\"\" width=\"590\" height=\"540\" \/><\/p>\n<h4>ND-35SHR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-969\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image13_l.gif\" alt=\"\" width=\"590\" height=\"540\" \/><\/p>\n<h4>ND-39R<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-967\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image04_l-2.gif\" alt=\"\" width=\"590\" height=\"540\" \/><\/p>\n<h4>ND-43R<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-968\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image05_l-2.gif\" alt=\"\" width=\"590\" height=\"540\" \/><\/p>\n<h2>Irreversible flux loss after an exposure to high temperatures<\/h2>\n<h3>Heating temperature 150\u2103<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-972\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image06_l-2.gif\" alt=\"\" width=\"510\" height=\"528\" \/><\/p>\n<p>&nbsp;<\/p>\n<h4>Heating temperature 180\u2103<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-973\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image07_l-1.gif\" alt=\"\" width=\"463\" height=\"528\" \/><\/p>\n<h3>Temperature dependence of irreversible flux loss<\/h3>\n<h4>ND-31HR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-974\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image08_l-1.gif\" alt=\"\" width=\"580\" height=\"276\" \/><\/p>\n<h4>ND-31SHR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-975\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image09_l.gif\" alt=\"\" width=\"580\" height=\"276\" \/><\/p>\n<h4>ND-35HR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-977\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image10_l.gif\" alt=\"\" width=\"580\" height=\"276\" \/><\/p>\n<h4>ND-35SHR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-978\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image14_l.gif\" alt=\"\" width=\"580\" height=\"276\" \/><\/p>\n<h4>ND-39R<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-979\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image11_l.gif\" alt=\"\" width=\"580\" height=\"276\" \/><\/p>\n<h4>ND-43R<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-980\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image12_l.gif\" alt=\"\" width=\"580\" height=\"276\" \/><\/p>\n<h2>Magnetization properties of radially oriented, anisotropic Nd-Fe-B ring magnets (NEOQUENCH-DR)<\/h2>\n<h3>Magnetic properties vs magnetizing field<\/h3>\n<h4>ND-31HR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-982\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01-1.gif\" alt=\"\" width=\"297\" height=\"223\" \/><\/p>\n<p>&nbsp;<\/p>\n<h4>ND-31SHR<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-983\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02.gif\" alt=\"\" width=\"297\" height=\"226\" \/><\/p>\n<h3>Magnetization patterns and application examples<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-984\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/daido1.png\" alt=\"\" width=\"948\" height=\"511\" srcset=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/daido1.png 948w, http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/daido1-300x162.png 300w, http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/daido1-768x414.png 768w\" sizes=\"auto, (max-width: 948px) 100vw, 948px\" \/><\/p>\n<h3>Examples of magnetized waveforms<\/h3>\n<h4>1. Multi-pole magnetization<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-985\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image06.gif\" alt=\"\" width=\"618\" height=\"336\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-986\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image07.gif\" alt=\"\" width=\"310\" height=\"200\" \/><\/p>\n<p>&nbsp;<\/p>\n<h4>2. North pole on OD and south pole on ID<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-987\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image10.gif\" alt=\"\" width=\"618\" height=\"336\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-988\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image09.gif\" alt=\"\" width=\"310\" height=\"200\" \/><\/p>\n<h4>Examples of controlled waveforms<\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-989\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image08.gif\" alt=\"\" width=\"618\" height=\"336\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-990\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image11.gif\" alt=\"\" width=\"310\" height=\"200\" \/><\/p>\n<h2>Surface coatings for radially oriented, anisotropic Nd-Fe-B ring magnets (NEOQUENCH-DR)<\/h2>\n<p>Due to the lack of porosity and lower Nd content, NEOQUENCH-DR has higher corrosion resistance than sintered Nd.<\/p>\n<p>These magnets are rust free for a long time in dry air. However, in a humid environment, an appropriate surface protection (coating) is necessary. Daido Electronics Co., Ltd. provides two types of coatings.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-991\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01-3.jpg\" alt=\"\" width=\"297\" height=\"269\" \/><\/p>\n<table summary=\"Paint, Coating\">\n<tbody>\n<tr>\n<th width=\"172\">Conditions<\/th>\n<th width=\"171\">Epoxy electrodeposition coating<br \/>\n20 \uff5e 35 \u00b5m<\/th>\n<th width=\"172\">Ni plating<br \/>\n15 \uff5e 30 \u00b5m<\/th>\n<\/tr>\n<tr>\n<td>Humidity test<br \/>\n80 \u2103 \u00d7 95%RH \u00d7 1000 hrs<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Water resistance * 1<br \/>\nDistilled water 40\u2103 \u00d7 96 hrs<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Salt spray test * 2<br \/>\n5% NaCl (pH 6.5 \uff5e 8)<\/td>\n<td class=\"center-position middole-position\">B (300hr)<\/td>\n<td class=\"center-position middole-position\">-\u3000-\u3000-<\/td>\n<\/tr>\n<tr>\n<td>Oil resistance * 1<br \/>\nGear oil 20\u2103 \u00d7 24 hrs<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Gasoline resistance * 1<br \/>\nGasoline 20\u2103 \u00d7 24 hrs<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Acid resistance * 1<br \/>\n10% H<sub>2<\/sub>SO<sub>4<\/sub>\u00a020\u2103 \u00d7 8 hrs<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Alkali resistance * 1<br \/>\n5% Na<sub>2<\/sub>CO<sub>3<\/sub>\u00a040\u2103 \u00d7 6 hrs<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Heat resistance * 1<br \/>\nAir 100\u2103 \u00d7 1 hr<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<tr>\n<td>Cycle crack test * 3<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<td class=\"center-position middole-position\">B<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color: #ff0000;\">\u203b1: JIS D0202<\/span><br \/>\n<span style=\"color: #ff0000;\">\u203b2: JIS Z2371<\/span><br \/>\n<span style=\"color: #ff0000;\">\u203b3: Five cycles of the pattern below (JIS D0202)<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-992\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image03.gif\" alt=\"\" width=\"433\" height=\"84\" \/><\/p>\n<p><span style=\"color: #ff0000;\">\u203b4: Please consult with us about your preferred locations of electrode marks.<\/span><\/p>\n<h2>Note for using NEOQUENCH-DR<\/h2>\n<h3>1. Thermal expansion considerations<\/h3>\n<p>NEOQUENCH-DR has lower CTE (coefficient of thermal expansion) than most metallic materials.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-994\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image01-2.gif\" alt=\"\" width=\"618\" height=\"185\" \/><\/p>\n<p>Proper clearance between the magnet and shaft is advised.<\/p>\n<h3>2. Mechanical Strength<\/h3>\n<p>NEOQUENCH-DR can eliminate the banding depending on the magnet OD, wall thickness, and rpm.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-995\" src=\"http:\/\/daido-electronics.co.jp\/english\/wp-content\/uploads\/2024\/05\/image02-1.gif\" alt=\"\" width=\"550\" height=\"357\" \/><\/p>\n<p>This diagram is for your reference purpose only.<\/p>\n<h4>3. Other<\/h4>\n<ol class=\"last-para\">\n<li>Magnets are fragile and easy to break. Please protect your eyes and other parts of your body from the debris.These magnets are extremely strong.Please take extreme caution to avoid being pinched.<\/li>\n<li>If magnets are damaged, it will lead to lower performance and deterioration.Magnets can also be damaged from high speed rotation. Please design your devise so that the debris would be contained in case of magnet breakage.<\/li>\n<li>Please be advised that magnets can attract small magnetic substances even when they are not magnetized.For precision motor assemblies, it is advised to perform a cleaning process after assemblying.<\/li>\n<li>Magnets may erase the records on magnetic media.Please keep magnets away from magnetic cards, tapes, and prepaid cards, etc.<\/li>\n<li>Electronic devises may be affected byt magnetic fields.Please keep magnets away from these devises to avoid malfunction or accidents.<\/li>\n<li>Never place magnets near the person who has medical electronic devises such as a pacemaker.These devises may not work properly near magnets.<\/li>\n<li>Please avoid the use or storage of magnets in the following environment where corrosion or deterioraion may occur.It is advisable to consult with us as to the corrosion resistance of the magnets and protective coating techniques.\n<ol>\n<li>Corrosive gas (Cl<sub>2<\/sub>, NH<sub>3<\/sub>, SOx, NOx, etc.)<\/li>\n<li>High electrical conductivity (aquaes solution with electrolytes)<\/li>\n<li>Hydrogen gas (H<sub>2<\/sub>)<\/li>\n<li>Acids, alkalis, organic solvents, etc.<\/li>\n<li>Water, oil, etc.<\/li>\n<\/ol>\n<\/li>\n<li>In general, rare-earth magnets require surface coating to prevent oxidation or corrosion.Please use the magnets with a coating appropriate for the environment.<\/li>\n<li>Rare-earth magnet powders are classified as a dangerous goods (flammable solid) in the Japanese Fire Services Act.Please do not use these magnets where fine particles can be created from friction, etc. as these particles can easily catch fire.<\/li>\n<li>Do not swallow magnets.If swallowed by mistake, consult your doctor immediately.<\/li>\n<li>Keep out of reach of children.<\/li>\n<li>People with metal alergies may develop skin irritation and redness when in contact with magnets.In such cases, avoid touching the magnets directly.<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Daido has developed a unique hot extrusion process to produce radially oriented anisotropic Nd-Fe-B ring magne<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-956","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/pages\/956","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/comments?post=956"}],"version-history":[{"count":5,"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/pages\/956\/revisions"}],"predecessor-version":[{"id":996,"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/pages\/956\/revisions\/996"}],"wp:attachment":[{"href":"http:\/\/daido-electronics.co.jp\/english\/wp-json\/wp\/v2\/media?parent=956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}