{"id":114444,"date":"2022-02-07T01:44:42","date_gmt":"2022-02-07T00:44:42","guid":{"rendered":"https:\/\/material-properties.org\/rubidium-et-strontium-comparaison-proprietes\/"},"modified":"2022-03-23T07:28:39","modified_gmt":"2022-03-23T06:28:39","slug":"rubidium-et-strontium-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/rubidium-et-strontium-comparaison-proprietes\/","title":{"rendered":"Rubidium et Strontium – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques du rubidium et du strontium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Rubidium contre Strontium.<\/em><\/p>\n

\"rubidium<\/p>\n

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

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

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

\"C\u00e9sium<\/a><\/p>\n<\/div><\/div>\n<\/div><\/div>\n

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

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

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

<\/div>\n
\n

Rubidium et Strontium – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Rubidium<\/h3>\n

Le rubidium est un \u00e9l\u00e9ment m\u00e9tallique doux et blanc argent\u00e9 du groupe des m\u00e9taux alcalins, avec une masse atomique de 85,4678.\u00a0Le rubidium \u00e9l\u00e9mentaire est hautement r\u00e9actif, avec des propri\u00e9t\u00e9s similaires \u00e0 celles des autres m\u00e9taux alcalins, y compris une oxydation rapide dans l’air.
\n<\/p><\/div>

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

Strontium<\/h3>\n

Le strontium est un m\u00e9tal alcalino-terreux, le strontium est un \u00e9l\u00e9ment m\u00e9tallique jaun\u00e2tre blanc argent\u00e9 doux qui est chimiquement tr\u00e8s r\u00e9actif.<\/p>\n<\/div>

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

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

\n

\"Iode<\/p>\n

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

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

<\/div>\n
\n

Rubidium et Strontium – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Rubidium<\/a><\/h3>\n

La propri\u00e9t\u00e9 photo\u00e9missive du rubidium, qui est celle d’une surface \u00e9mettant des \u00e9lectrons libres lorsqu’elle est touch\u00e9e par un rayonnement \u00e9lectromagn\u00e9tique, permet les applications suivantes.\u00a0Une surface photo\u00e9missive rubidium-tellure est utilis\u00e9e dans les cellules photo\u00e9lectriques, qui sont incorpor\u00e9es dans une vari\u00e9t\u00e9 de dispositifs \u00e9lectroniques de d\u00e9tection et d’activation.\u00a0Il est sensible \u00e0 un large spectre de rayonnement allant de l’ultraviolet moyen au visible jusqu’au proche infrarouge.\u00a0Un rev\u00eatement rubidium-c\u00e9sium-antimoine est couramment appliqu\u00e9 sur les photocathodes des tubes photomultiplicateurs.\u00a0Le rubidium-82 est utilis\u00e9 pour la tomographie par \u00e9mission de positrons.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

Strontium<\/a><\/h3>\n

Consommant 75% de la production, le strontium \u00e9tait principalement utilis\u00e9 dans le verre des tubes cathodiques de t\u00e9l\u00e9vision couleur.\u00a0Le strontium est surtout connu pour les rouges brillants que ses sels donnent aux feux d’artifice et aux fus\u00e9es \u00e9clairantes.\u00a0Il est \u00e9galement utilis\u00e9 dans la production d’aimants en ferrite et dans le raffinage du zinc.\u00a0Les peintures et plastiques modernes \u00ab phosphorescents \u00bb contiennent de l’aluminate de strontium.\u00a0Ils absorbent la lumi\u00e8re pendant la journ\u00e9e et la lib\u00e8rent lentement pendant des heures apr\u00e8s.\u00a0L’isotope Sr90 a une demi-vie de 28 ans et est l’un des \u00e9metteurs b\u00eata de haute \u00e9nergie bien connus.\u00a0Par cons\u00e9quent, il est utilis\u00e9 dans les syst\u00e8mes pour dispositifs d’alimentation auxiliaire nucl\u00e9aire (SNAP), qui trouvent des applications potentielles dans les stations m\u00e9t\u00e9orologiques \u00e9loign\u00e9es, les v\u00e9hicules spatiaux, les bou\u00e9es de navigation, etc.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Rubidium et Strontium – 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>\nRubidium<\/b><\/td>\nStrontium<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n1,532 g\/cm3<\/strong><\/td>\n2,63 g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/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>\n2,4 GPa<\/strong><\/td>\n15,7 GPa<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n0,3<\/strong><\/td>\n1,8<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\n0,216 MPa<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\nN \/ A<\/strong><\/td>\nN \/ A<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n39.31\u00b0C<\/strong><\/td>\n777\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n688\u00b0C<\/strong><\/td>\n1382\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n58,2 W\/mK<\/strong><\/td>\n35,3 W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\n90 \u00b5m\/mK<\/strong><\/td>\n22,5 \u00b5m\/mK<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,363 J\/g\u00b7K<\/span><\/strong><\/td>\n0,3 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n2,192 kJ\/mole<\/strong><\/td>\n8,3 kJ\/mole<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n72,216 kJ\/mol<\/span><\/strong><\/td>\n144 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 rubidium et du strontium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique.\u00a0Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments.\u00a0Rubidium contre Strontium. 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":"\nRubidium et Strontium - 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 rubidium et du strontium, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. Rubidium contre Strontium.\" \/>\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\/rubidium-et-strontium-comparaison-proprietes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Rubidium et Strontium - 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 rubidium et du strontium, 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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