{"id":114390,"date":"2022-02-05T00:08:25","date_gmt":"2022-02-04T23:08:25","guid":{"rendered":"https:\/\/material-properties.org\/lanthane-et-cerium-comparaison-proprietes\/"},"modified":"2022-03-22T11:37:06","modified_gmt":"2022-03-22T10:37:06","slug":"lanthane-et-cerium-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/lanthane-et-cerium-comparaison-proprietes\/","title":{"rendered":"Lanthane et C\u00e9rium – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du lanthane et du c\u00e9rium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Lanthane vs C\u00e9rium.<\/em><\/p>\n

\"lanthane<\/p>\n

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

\"C\u00e9rium<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

\n
<\/span>Comparer le c\u00e9rium avec un autre \u00e9l\u00e9ment<\/div>
\n
<\/div>\n

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

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

<\/div>\n
\n

Lanthane et C\u00e9rium – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Lanthane<\/h3>\n

Le lanthane est un m\u00e9tal doux, ductile, blanc argent\u00e9 qui ternit rapidement lorsqu’il est expos\u00e9 \u00e0 l’air et est suffisamment mou pour \u00eatre coup\u00e9 avec un couteau.\u00a0C’est l’\u00e9ponyme de la s\u00e9rie des lanthanides, un groupe de 15 \u00e9l\u00e9ments similaires entre le lanthane et le lut\u00e9tium dans le tableau p\u00e9riodique, dont le lanthane est le premier et le prototype.\u00a0Il est aussi parfois consid\u00e9r\u00e9 comme le premier \u00e9l\u00e9ment des m\u00e9taux de transition de 6\u00e8me p\u00e9riode et est traditionnellement compt\u00e9 parmi les \u00e9l\u00e9ments de terres rares.<\/p>\n<\/div>

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

C\u00e9rium<\/h3>\n

Le c\u00e9rium est un m\u00e9tal mou, ductile et blanc argent\u00e9 qui ternit lorsqu’il est expos\u00e9 \u00e0 l’air, et il est suffisamment mou pour \u00eatre coup\u00e9 avec un couteau.\u00a0Le c\u00e9rium est le deuxi\u00e8me \u00e9l\u00e9ment de la s\u00e9rie des lanthanides.\u00a0Le c\u00e9rium est aussi traditionnellement consid\u00e9r\u00e9 comme l’un des \u00e9l\u00e9ments des terres rares.<\/p>\n<\/div>

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

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

\n

\"C\u00e9rium<\/p>\n

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

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

<\/div>\n
\n

Lanthane et C\u00e9rium – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Lanthane<\/a><\/h3>\n

Le lanthane n’est pas un m\u00e9tal largement utilis\u00e9.\u00a0Cependant, ses alliages ont une vari\u00e9t\u00e9 d’utilisations int\u00e9ressantes.\u00a0Un alliage lanthane-nickel est utilis\u00e9 pour stocker l’hydrog\u00e8ne gazeux \u00e0 utiliser dans les v\u00e9hicules \u00e0 hydrog\u00e8ne.\u00a0Le lanthane se trouve \u00e9galement dans l’anode des batteries \u00e0 hydrure m\u00e9tallique de nickel (NiMH) utilis\u00e9es dans les voitures hybrides.\u00a0Le lanthane est un composant important de l’alliage de mischm\u00e9tal.\u00a0Une composition typique comprend environ 55\u00a0% de c\u00e9rium, 25\u00a0% de lanthane et 15 \u00e0 18\u00a0% de n\u00e9odyme suivis d’autres m\u00e9taux de terres rares.\u00a0L’utilisation la plus connue de cet alliage est dans les \u00ab\u00a0pierres \u00e0 feu\u00a0\u00bb pour les briquets.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

C\u00e9rium<\/a><\/h3>\n

Le c\u00e9rium est un composant important de l’alliage de mischm\u00e9tal. Le ferroc\u00e9rium est un alliage pyrophorique synth\u00e9tique qui produit des \u00e9tincelles chaudes pouvant atteindre des temp\u00e9ratures de 3000\u00b0C (5430\u00b0F) lorsqu’il est rapidement oxyd\u00e9 par le processus de frappe de la tige, la fragmentant ainsi et exposant ces fragments \u00e0 l’oxyg\u00e8ne de l’air. Une composition typique comprend environ 55 % de c\u00e9rium, 25 % de lanthane et 15 \u00e0 18 % de n\u00e9odyme suivis d’autres m\u00e9taux de terres rares. L’utilisation la plus connue de cet alliage est dans les \u00ab\u00a0pierres \u00e0 feu\u00a0\u00bb pour les briquets. La c\u00e9rine est le compos\u00e9 de c\u00e9rium le plus largement utilis\u00e9. L’oxyde de c\u00e9rium est principalement utilis\u00e9 comme compos\u00e9 de polissage, par exemple dans la planarisation chimico-m\u00e9canique (CMP).<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Lanthane et C\u00e9rium – 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>\nLanthane<\/b><\/td>\nC\u00e9rium<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n6,146 g\/cm3<\/strong><\/td>\n6,689 g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\n130 MPa<\/strong><\/td>\n100 MPa<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\n125 MPa<\/strong><\/td>\n90 MPa<\/strong><\/td>\n<\/tr>\n
Module de Young<\/td>\n36,6 GPa<\/strong><\/td>\n33,6 GPa<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n2,5<\/strong><\/td>\n2,5<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\n350 MPa<\/strong><\/td>\n412 MPa<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\n360 MPa<\/strong><\/td>\n300 MPa<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n920\u00b0C<\/strong><\/td>\n798\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n3454\u00b0C<\/strong><\/td>\n3457\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n13W\/mK<\/strong><\/td>\n11W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\n12,1 \u00b5m\/mK<\/strong><\/td>\n6,3 \u00b5m\/mK<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,19 J\/g\u00b7K<\/span><\/strong><\/td>\n0,19 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n6,2 kJ\/mole<\/strong><\/td>\n5,46 kJ\/mole<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n414 kJ\/mole<\/span><\/strong><\/td>\n414 kJ\/mole<\/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 lanthane et du c\u00e9rium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Lanthane vs C\u00e9rium. 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":"\nLanthane et C\u00e9rium - 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 lanthane et du c\u00e9rium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. 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