{"id":115483,"date":"2022-04-24T19:57:12","date_gmt":"2022-04-24T18:57:12","guid":{"rendered":"https:\/\/material-properties.org\/lithium-et-magnesium-comparaison-proprietes\/"},"modified":"2022-04-25T10:31:57","modified_gmt":"2022-04-25T09:31:57","slug":"lithium-et-magnesium-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/lithium-et-magnesium-comparaison-proprietes\/","title":{"rendered":"Lithium et Magn\u00e9sium – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du lithium et du magn\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Lithium contre Magn\u00e9sium.<\/em><\/p>\n

\"lithium<\/p>\n

\n
<\/span>Comparer le lithium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Hydrog\u00e8ne<\/a><\/p>\n

\"Oxyg\u00e8ne<\/a><\/p>\n

\"Aluminium<\/a><\/p>\n

\"Azote<\/a><\/p>\n

\"Sodium<\/a><\/p>\n

\"Calcium<\/a><\/p>\n

\"Silicium<\/a><\/p>\n

\"Cadmium<\/a><\/p>\n

\"Cobalt<\/a><\/p>\n

\"Magn\u00e9sium<\/a><\/p>\n

\"Phosphore<\/a><\/p>\n

\"Potassium<\/a><\/p>\n

\"Soufre<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

\n
<\/span>Comparer le magn\u00e9sium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

\"Lithium<\/a><\/p>\n

\"B\u00e9ryllium<\/a><\/p>\n

\"Oxyg\u00e8ne<\/a><\/p>\n

\"Sodium<\/a><\/p>\n

\"Calcium<\/a><\/p>\n

\"Potassium<\/a><\/p>\n

\"Chlore<\/a><\/p>\n

\"Zinc<\/a><\/p>\n

\"Brome<\/a><\/p>\n

\"Aluminium<\/a><\/p>\n

\"Fer<\/a><\/p>\n

\"Cuivre<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

<\/div>\n
\n

Lithium et Magn\u00e9sium – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Lithium<\/h3>\n

C’est un m\u00e9tal alcalin doux et blanc argent\u00e9.\u00a0Dans des conditions standard, c’est le m\u00e9tal le plus l\u00e9ger et l’\u00e9l\u00e9ment solide le plus l\u00e9ger.\u00a0Comme tous les m\u00e9taux alcalins, le lithium est hautement r\u00e9actif et inflammable et est stock\u00e9 dans de l’huile min\u00e9rale.
\n<\/p><\/div>

<\/div><\/div>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Magn\u00e9sium<\/h3>\n

Le magn\u00e9sium est un solide gris brillant qui ressemble physiquement aux cinq autres \u00e9l\u00e9ments de la deuxi\u00e8me colonne (groupe 2 ou m\u00e9taux alcalino-terreux) du tableau p\u00e9riodique: tous les \u00e9l\u00e9ments du groupe 2 ont la m\u00eame configuration \u00e9lectronique dans la couche \u00e9lectronique externe et une structure cristalline similaire.
\n<\/p><\/div>

<\/div><\/div>\n<\/div><\/div>\n
<\/div>\n
\n

\"Lithium<\/p>\n<\/div><\/div>\n

\n

\"Magn\u00e9sium<\/p>\n

<\/p><\/div><\/div>\n

Source : www.luciteria.com<\/p>\n

<\/div>\n
\n

Lithium et Magn\u00e9sium – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Lithium<\/a><\/h3>\n

Le lithium a de nombreuses applications, de la graisse lubrifiante, aux ajouts d’alliages notamment pour les alliages d’aluminium et de magn\u00e9sium, aux \u00e9maux pour c\u00e9ramiques, et enfin, les batteries au lithium.\u00a0En particulier, le lithium joue et continuera de jouer un r\u00f4le de plus en plus important dans l’avenir de l’air pur aliment\u00e9 par batterie.\u00a0Les batteries au lithium sont largement utilis\u00e9es dans les appareils \u00e9lectroniques grand public portables et dans les v\u00e9hicules \u00e9lectriques allant des v\u00e9hicules de grande taille aux jouets radiocommand\u00e9s.\u00a0Le terme \u00ab\u00a0batterie au lithium\u00a0\u00bb fait r\u00e9f\u00e9rence \u00e0 une famille de diff\u00e9rentes chimies lithium-m\u00e9tal, comprenant de nombreux types de cathodes et d’\u00e9lectrolytes, mais tous avec du lithium m\u00e9tallique comme anode.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

Magn\u00e9sium<\/a><\/h3>\n

Le magn\u00e9sium est le troisi\u00e8me m\u00e9tal de structure le plus couramment utilis\u00e9, apr\u00e8s le fer et l’aluminium.[35]\u00a0Les principales applications du magn\u00e9sium sont, dans l’ordre : les alliages d’aluminium, le moulage sous pression (alli\u00e9 au zinc), l’\u00e9limination du soufre dans la production de fer et d’acier, et la production de titane dans le proc\u00e9d\u00e9 Kroll.\u00a0Les alliages de magn\u00e9sium sont utilis\u00e9s dans une grande vari\u00e9t\u00e9 d’applications structurelles et non structurelles.\u00a0Les applications structurelles incluent les \u00e9quipements automobiles, industriels, de manutention, commerciaux et a\u00e9rospatiaux.\u00a0Les alliages de magn\u00e9sium sont utilis\u00e9s pour les pi\u00e8ces qui fonctionnent \u00e0 des vitesses \u00e9lev\u00e9es et doivent donc \u00eatre l\u00e9gers pour minimiser les forces d’inertie.\u00a0Les applications commerciales comprennent les outils portatifs, les ordinateurs portables, les bagages et les \u00e9chelles, les automobiles (par exemple, les volants et les colonnes, les cadres de si\u00e8ge, les bo\u00eetiers de transmission).\u00a0Magnox (alliage),<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Lithium et Magn\u00e9sium – Comparaison dans le tableau<\/h2>\n<\/div><\/div>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u00c9l\u00e9ment<\/td>\nLithium<\/strong><\/td>\nMagn\u00e9sium<\/strong><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n0,535 g\/cm3<\/strong><\/td>\n1,738 g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\n1,5 MPa<\/strong><\/td>\n200 MPa<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Module de Young<\/td>\n4,9 GPa<\/strong><\/td>\n45 GPa<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n0,6<\/strong><\/td>\n2,5<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\n5 MPa<\/strong><\/td>\n260 MPa<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n180,5\u00a0\u00b0C<\/strong><\/td>\n649\u00a0\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n1342 \u00b0C<\/strong><\/td>\n1090 \u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n85 W\/mK<\/strong><\/td>\n156 W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\n46 \u00b5m\/mK<\/strong><\/td>\n24,8 \u00b5m\/mK<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n3,6 J\/g\u00b7K<\/span><\/strong><\/td>\n1,02 J\/g\u00b7K<\/span><\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n3 kJ\/mol<\/span><\/strong><\/td>\n8,954 kJ\/mol<\/span><\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n145,92 kJ\/mol<\/span><\/strong><\/td>\n127,4 kJ\/mol<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du lithium et du magn\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Lithium contre Magn\u00e9sium. Source : www.luciteria.com<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"yoast_head":"\nLithium et Magn\u00e9sium - Comparaison - Propri\u00e9t\u00e9s - Material Properties<\/title>\n<meta name=\"description\" content=\"Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du lithium et du magn\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. Lithium contre Magn\u00e9sium.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/material-properties.org\/fr\/lithium-et-magnesium-comparaison-proprietes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lithium et Magn\u00e9sium - Comparaison - Propri\u00e9t\u00e9s - Material Properties\" \/>\n<meta property=\"og:description\" content=\"Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du lithium et du magn\u00e9sium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. 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