{"id":114406,"date":"2022-02-05T06:01:46","date_gmt":"2022-02-05T05:01:46","guid":{"rendered":"https:\/\/material-properties.org\/hafnium-et-tantale-comparaison-proprietes\/"},"modified":"2022-03-22T13:20:43","modified_gmt":"2022-03-22T12:20:43","slug":"hafnium-et-tantale-comparaison-proprietes","status":"publish","type":"post","link":"https:\/\/material-properties.org\/fr\/hafnium-et-tantale-comparaison-proprietes\/","title":{"rendered":"Hafnium et Tantale – Comparaison – Propri\u00e9t\u00e9s"},"content":{"rendered":"

Cet article contient une comparaison des principales propri\u00e9t\u00e9s thermiques et atomiques de l’hafnium et du tantale, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. Hafnium contre Tantale.<\/em><\/p>\n

\"hafnium<\/p>\n

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

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

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

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

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

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

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

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

<\/div>\n
\n

Hafnium et Tantale – \u00c0 propos des \u00e9l\u00e9ments<\/h2>\n<\/div><\/div>\n
\n
\"\"<\/div>
\n

Hafnium<\/h3>\n

Le hafnium est un m\u00e9tal de transition t\u00e9travalent gris argent\u00e9 brillant, le hafnium ressemble chimiquement au zirconium et se trouve dans de nombreux min\u00e9raux de zirconium.\u00a0La grande section efficace de capture des neutrons du hafnium en fait un bon mat\u00e9riau pour l’absorption des neutrons dans les barres de commande des centrales nucl\u00e9aires, mais n\u00e9cessite en m\u00eame temps qu’il soit retir\u00e9 des alliages de zirconium transparents aux neutrons et r\u00e9sistants \u00e0 la corrosion utilis\u00e9s dans les r\u00e9acteurs nucl\u00e9aires.<\/p>\n<\/div>

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

Tantale<\/h3>\n

Le tantale est un m\u00e9tal de transition rare, dur, bleu-gris et lustr\u00e9 qui est tr\u00e8s r\u00e9sistant \u00e0 la corrosion.<\/p>\n<\/div>

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

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

\n

\"Tantale<\/p>\n

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

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

<\/div>\n
\n

Hafnium et Tantale – Applications<\/h2>\n<\/div><\/div>\n
\n
\n
\n

Hafnium<\/a><\/h3>\n

L’hafnium a de bonnes propri\u00e9t\u00e9s d’absorption des neutrons et est donc utilis\u00e9 dans les barres de contr\u00f4le des r\u00e9acteurs nucl\u00e9aires, mais n\u00e9cessite en m\u00eame temps qu’il soit retir\u00e9 des alliages de zirconium transparents aux neutrons et r\u00e9sistants \u00e0 la corrosion utilis\u00e9s dans les r\u00e9acteurs nucl\u00e9aires. Alors que le nitrure d’hafnium est le plus r\u00e9fractaire de tous les nitrures m\u00e9talliques, le carbure d’hafnium est le plus r\u00e9fractaire de tous les mat\u00e9riaux binaires. Avec un point de fusion d’environ 3900\u00b0C, c’est l’un des compos\u00e9s binaires les plus r\u00e9fractaires connus. L’hafnium a \u00e9t\u00e9 alli\u00e9 avec succ\u00e8s \u00e0 plusieurs m\u00e9taux, dont le fer, le titane et le niobium.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n
\n
\n

Tantale<\/a><\/h3>\n

La consommation de tantale est domin\u00e9e par les condensateurs pour les \u00e9quipements \u00e9lectroniques.\u00a0Les condensateurs sont des composants \u00e9lectriques qui stockent l’\u00e9nergie \u00e9lectrostatiquement dans un champ \u00e9lectrique et sont utilis\u00e9s dans une grande vari\u00e9t\u00e9 de produits \u00e9lectriques et \u00e9lectroniques.\u00a0Les principales utilisations finales des condensateurs au tantale comprennent les t\u00e9l\u00e9phones portables, les t\u00e9l\u00e9avertisseurs, les ordinateurs personnels et l’\u00e9lectronique automobile.\u00a0Alli\u00e9 \u00e0 d’autres m\u00e9taux, le tantale est \u00e9galement utilis\u00e9 dans la fabrication d’outils en carbure pour les \u00e9quipements de travail des m\u00e9taux et dans la production de superalliages pour les composants des moteurs \u00e0 r\u00e9action.\u00a0Des compos\u00e9s de tantale tels que le pentoxyde de tantale sont utilis\u00e9s pour fabriquer des condensateurs et du verre \u00e0 indice de r\u00e9fraction \u00e9lev\u00e9 \u00e0 utiliser dans les objectifs d’appareil photo.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>\n

\n

Hafnium et Tantale – 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>\nHafnium<\/b><\/td>\nTantale<\/b><\/td>\n<\/tr>\n
Densit\u00e9<\/td>\n13,31 g\/cm3<\/strong><\/td>\n16,65 g\/cm3<\/strong><\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction ultime<\/td>\n480 MPa<\/strong><\/td>\n760 MPa<\/strong><\/td>\n<\/tr>\n
Limite d’\u00e9lasticit\u00e9<\/td>\n125 MPa<\/strong><\/td>\n705 MPa<\/strong><\/td>\n<\/tr>\n
Module de Young<\/td>\n78 GPa<\/strong><\/td>\n186 GPa<\/strong><\/td>\n<\/tr>\n
\u00c9chelle de Mohs<\/td>\n5,5<\/strong><\/td>\n6,5<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Brinell<\/td>\n1700 MPa<\/strong><\/td>\n800 MPa<\/strong><\/td>\n<\/tr>\n
Duret\u00e9 Vickers<\/td>\n1700 MPa<\/strong><\/td>\n870 MPa<\/strong><\/td>\n<\/tr>\n
Point de fusion<\/td>\n2227\u00b0C<\/strong><\/td>\n2996\u00b0C<\/strong><\/td>\n<\/tr>\n
Point d’\u00e9bullition<\/td>\n4600\u00b0C<\/strong><\/td>\n5425\u00b0C<\/strong><\/td>\n<\/tr>\n
Conductivit\u00e9 thermique<\/td>\n23W\/mK<\/strong><\/td>\n57W\/mK<\/strong><\/td>\n<\/tr>\n
Coefficient de dilatation thermique<\/td>\n5,9 \u00b5m\/mK<\/strong><\/td>\n6,3 \u00b5m\/mK<\/strong><\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique<\/td>\n0,14 J\/g\u00b7K<\/span><\/strong><\/td>\n0,14 J\/g\u00b7K<\/strong><\/td>\n<\/tr>\n
Temp\u00e9rature de fusion<\/td>\n24,06 kJ\/mole<\/strong><\/td>\n31,6 kJ\/mole<\/strong><\/td>\n<\/tr>\n
Chaleur de vaporisation<\/td>\n575 kJ\/mole<\/span><\/strong><\/td>\n743 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 de l’hafnium et du tantale, deux \u00e9l\u00e9ments chimiques comparables du tableau p\u00e9riodique. Il contient \u00e9galement des descriptions de base et des applications des deux \u00e9l\u00e9ments. Hafnium contre Tantale. 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":"\nHafnium et Tantale - 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 de l'hafnium et du tantale, 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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