{"id":116747,"date":"2022-05-23T16:17:39","date_gmt":"2022-05-23T15:17:39","guid":{"rendered":"https:\/\/material-properties.org\/quest-ce-que-la-permeabilite-du-vide-constante-magnetique-definition\/"},"modified":"2022-05-24T07:21:06","modified_gmt":"2022-05-24T06:21:06","slug":"quest-ce-que-la-permeabilite-du-vide-constante-magnetique-definition","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/quest-ce-que-la-permeabilite-du-vide-constante-magnetique-definition\/","title":{"rendered":"Qu&rsquo;est-ce que la perm\u00e9abilit\u00e9 du vide &#8211; Constante magn\u00e9tique &#8211; D\u00e9finition"},"content":{"rendered":"<p><span><div class=\"su-quote su-quote-style-default\"><div class=\"su-quote-inner su-u-clearfix su-u-trim\">Selon la r\u00e9f\u00e9rence NIST sur les constantes physiques fondamentales, la constante magn\u00e9tique (perm\u00e9abilit\u00e9 du vide) a la valeur exacte (d\u00e9finie) \u03bc0 = 4\u03c0 \u00d7 10\u22127 H\/m \u2248 12,57\u00d710\u22127 H\/m.<\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span>En \u00e9lectromagn\u00e9tisme, la\u00a0<\/span><strong><span>perm\u00e9abilit\u00e9<\/span><\/strong><span>\u00a0est la mesure de la\u00a0<\/span><strong><span>r\u00e9sistance<\/span><\/strong><span>\u00a0d&rsquo;une substance \u00e0 la\u00a0<\/span><strong><span>formation d&rsquo;un champ magn\u00e9tique<\/span><\/strong><span>.\u00a0Le champ magn\u00e9tique auxiliaire H repr\u00e9sente comment un champ magn\u00e9tique B influence l&rsquo;organisation des dip\u00f4les magn\u00e9tiques dans une substance donn\u00e9e.\u00a0L&rsquo;intensit\u00e9 du champ magn\u00e9tique et la densit\u00e9 de flux sont li\u00e9es selon:<\/span><\/p>\n<p><a href=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2019\/12\/permeability-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-28067\" src=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2019\/12\/permeability-definition.png\" alt=\"perm\u00e9abilit\u00e9\" width=\"350\" height=\"126\" \/><\/a><\/p>\n<p><span>Dans cette \u00e9quation, B repr\u00e9sente l&rsquo;amplitude de l&rsquo;intensit\u00e9 du champ interne dans une substance soumise \u00e0 un champ H.\u00a0La\u00a0<\/span><strong><span>perm\u00e9abilit\u00e9<\/span><\/strong><span>\u00a0a des dimensions de\u00a0<\/span><strong><span>webers par amp\u00e8re-m\u00e8tre<\/span><\/strong><span>\u00a0(Wb\/Am) ou\u00a0<\/span><strong><span>de henrys par m\u00e8tre<\/span><\/strong><span>\u00a0(H\/m).\u00a0La constante de perm\u00e9abilit\u00e9\u00a0<\/span><strong><span>\u03bc<\/span><sub><span>0<\/span><\/sub><\/strong><span>, \u00e9galement appel\u00e9e constante magn\u00e9tique ou\u00a0<\/span><strong><span>perm\u00e9abilit\u00e9 de l&rsquo;espace libre<\/span><\/strong><span>, est une mesure de la quantit\u00e9 de r\u00e9sistance rencontr\u00e9e lors de la formation d&rsquo;un champ magn\u00e9tique dans un vide classique.\u00a0Cette constante est tr\u00e8s importante, car l&rsquo;une des propri\u00e9t\u00e9s magn\u00e9tiques importantes est la\u00a0<\/span><strong><span>perm\u00e9abilit\u00e9 relative<\/span><\/strong><span>\u00a0(sans dimension), le rapport de la perm\u00e9abilit\u00e9 dans un mat\u00e9riau \u00e0 la perm\u00e9abilit\u00e9 dans le vide.<\/span><\/p>\n<p><a href=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2019\/12\/relative-permeability-definition.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-28068\" src=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2019\/12\/relative-permeability-definition.png\" alt=\"perm\u00e9abilit\u00e9 relative\" width=\"278\" height=\"152\" \/><\/a><\/p>\n<p><span>Selon la r\u00e9f\u00e9rence NIST sur les constantes physiques fondamentales, la\u00a0<\/span><strong><span>constante magn\u00e9tique<\/span><\/strong><span>\u00a0a la valeur exacte (d\u00e9finie)<\/span><\/p>\n<p style=\"text-align: center;\"><em><span>\u03bc\u00a0<\/span><\/em><sub><span>0<\/span><\/sub><span>\u00a0\u00a0= 4\u03c0 \u00d7 10\u00a0<\/span><sup><span>\u22127<\/span><\/sup><span> \u00a0H\/m \u2248 12,57\u00d710<\/span><sup><span>\u22127<\/span><\/sup><span>\u00a0\u00a0H\/m.<\/span><\/p>\n<p><span>Une propri\u00e9t\u00e9 \u00e9troitement li\u00e9e des mat\u00e9riaux est\u00a0<\/span><strong><span>la susceptibilit\u00e9 magn\u00e9tique<\/span><\/strong><span>, qui est un facteur de proportionnalit\u00e9 sans dimension qui indique le\u00a0<\/span><strong><span>degr\u00e9 de magn\u00e9tisation<\/span><\/strong><span>\u00a0d&rsquo;un mat\u00e9riau en r\u00e9ponse \u00e0 un champ magn\u00e9tique appliqu\u00e9.<\/span><\/p>\n<p><a href=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2019\/12\/magnetic-susceptibility-permeability.png\"><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter size-full wp-image-28064\" src=\"https:\/\/www.nuclear-power.com\/wp-content\/uploads\/2019\/12\/magnetic-susceptibility-permeability.png\" alt=\"susceptibilit\u00e9 magn\u00e9tique\" width=\"355\" height=\"142\" \/><\/a><\/p>\n<p><span>\u00a0<\/span><\/p>\n<p><span><\/span><\/p><\/div><\/div><\/span><\/p>\n<p><span><div  class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<p><span><div class=\"su-accordion su-u-trim\"><div class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus\" data-scroll-offset=\"0\" data-anchor-in-url=\"no\"><div class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>References :<\/div><div class=\"su-spoiler-content su-u-clearfix su-u-trim\">\u00a0<\/div><\/div><\/div><\/span><strong><span>Science des mat\u00e9riaux:<\/span><\/strong><\/p>\n<ol>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 1 et 2. Janvier 1993.<\/span><\/li>\n<li><span>D\u00e9partement am\u00e9ricain de l&rsquo;\u00e9nergie, science des mat\u00e9riaux.\u00a0DOE Fundamentals Handbook, Volume 2 et 2. Janvier 1993.<\/span><\/li>\n<li><span>William D. Callister, David G. Rethwisch.\u00a0Science et g\u00e9nie des mat\u00e9riaux : une introduction 9e \u00e9dition, Wiley ;\u00a09 \u00e9dition (4 d\u00e9cembre 2013), ISBN-13\u00a0: 978-1118324578.<\/span><\/li>\n<li><span>En ligneEberhart, Mark (2003).\u00a0Pourquoi les choses se cassent\u00a0: Comprendre le monde par la mani\u00e8re dont il se d\u00e9compose.\u00a0Harmonie.\u00a0ISBN 978-1-4000-4760-4.<\/span><\/li>\n<li><span>Gaskell, David R. (1995).\u00a0Introduction \u00e0 la thermodynamique des mat\u00e9riaux (4e \u00e9d.).\u00a0\u00c9ditions Taylor et Francis.\u00a0ISBN 978-1-56032-992-3.<\/span><\/li>\n<li><span>Gonzalez-Vi\u00f1as, W. &amp; Mancini, HL (2004).\u00a0Une introduction \u00e0 la science des mat\u00e9riaux.\u00a0Presse universitaire de Princeton.\u00a0ISBN 978-0-691-07097-1<\/span><\/li>\n<li><span>Ashby, Michael;\u00a0Hugh Shercliff;\u00a0David Cebon (2007).\u00a0Mat\u00e9riaux: ing\u00e9nierie, science, traitement et conception (1\u00e8re \u00e9d.).\u00a0Butterworth-Heinemann.\u00a0ISBN 978-0-7506-8391-3.<\/span><\/li>\n<li><span>JR Lamarsh, AJ Baratta, Introduction au g\u00e9nie nucl\u00e9aire, 3e \u00e9d., Prentice-Hall, 2001, ISBN : 0-201-82498-1.<\/span><\/li>\n<\/ol>\n<p><span><\/span><\/p><\/div><\/div><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div class=\"su-divider su-divider-style-default\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\">\n<h2><span>Voir au dessus:<\/span><\/h2>\n<p><span>Propri\u00e9t\u00e9s magn\u00e9tiques<a href=\"https:\/\/www.nuclear-power.com\/nuclear-engineering\/materials-science\/material-properties\/magnetic-properties-of-materials\/\" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff ;border-color:#ffffff ;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff ;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><img src=\"icon : lien\" alt=\"\" style=\"width:24px;height:24px\" \/> <\/span><\/a><\/span><\/p><\/div><\/div><div  class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div  class=\"inside-grid-column\"><\/div><\/div><\/span><\/p>\n<p><span><div class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/span><\/p>\n<p><span>Nous esp\u00e9rons que cet article,\u00a0<\/span><strong><span>Perm\u00e9abilit\u00e9 du vide &#8211; Constante magn\u00e9tique<\/span><\/strong><span>, vous aidera.\u00a0Si oui,\u00a0<\/span><strong><span>donnez-nous un like<\/span><\/strong><span>\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous esp\u00e9rons que cet article,\u00a0Perm\u00e9abilit\u00e9 du vide &#8211; Constante magn\u00e9tique, vous aidera.\u00a0Si oui,\u00a0donnez-nous un like\u00a0dans la barre lat\u00e9rale.\u00a0L&rsquo;objectif principal de ce site Web est d&rsquo;aider le public \u00e0 apprendre des informations int\u00e9ressantes et importantes sur les mat\u00e9riaux et leurs propri\u00e9t\u00e9s.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - 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