{"id":80161,"date":"2024-01-14T13:17:02","date_gmt":"2024-01-14T13:17:02","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/conductividad-electrica-y-termica\/"},"modified":"2024-01-16T20:24:53","modified_gmt":"2024-01-16T20:24:53","slug":"conductividad-electrica-y-termica","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/es\/conductividad-electrica-y-termica\/","title":{"rendered":"Conductividad el\u00e9ctrica y t\u00e9rmica."},"content":{"rendered":"<h2>Conductividad El\u00e9ctrica y T\u00e9rmica<\/h2>\n<p>En el campo de la f\u00edsica y la ingenier\u00eda, dos propiedades fundamentales de los materiales son la conductividad el\u00e9ctrica y t\u00e9rmica. Estas propiedades, aunque distintas, muestran una relaci\u00f3n proporcional en los metales seg\u00fan la ley de Wiedemann-Franz.<\/p>\n<h2>Ley de Wiedemann-Franz<\/h2>\n<p>Esta ley establece que la relaci\u00f3n entre la contribuci\u00f3n electr\u00f3nica de la conductividad t\u00e9rmica (k) y la conductividad el\u00e9ctrica (\u03c3) en un metal es proporcional a la temperatura (T). En t\u00e9rminos matem\u00e1ticos, se expresa a trav\u00e9s de la f\u00f3rmula:<\/p>\n<p><i>k\/\u03c3 = LT<\/i>, donde <i>L<\/i> es una constante conocida como n\u00famero de Lorenz.<\/p>\n<p>Este comportamiento se basa en que tanto el transporte de calor como el el\u00e9ctrico en los metales involucran a los electrones libres. A mayor temperatura, la conductividad el\u00e9ctrica disminuye debido a que las colisiones desv\u00edan a los electrones, impidiendo un transporte efectivo de carga. Sin embargo, la conductividad t\u00e9rmica aumenta con la velocidad promedio de las part\u00edculas, lo que favorece el transporte de energ\u00eda.<\/p>\n<h2>Conductividad El\u00e9ctrica<\/h2>\n<p>La conductividad el\u00e9ctrica representa la capacidad de un material para conducir corriente el\u00e9ctrica. Su unidad en el Sistema Internacional es el siemens por metro (S\/m). Factores como la densidad y movilidad de los portadores de carga (electrones o iones), la estructura del material, la temperatura y otros factores ambientales influyen en ella. Los materiales con alta conductividad el\u00e9ctrica, como los metales, algunas sales y soluciones, se utilizan para transportar corriente el\u00e9ctrica con m\u00ednima resistencia o p\u00e9rdida de energ\u00eda.<\/p>\n<h2>Conductividad T\u00e9rmica<\/h2>\n<p>La conductividad t\u00e9rmica var\u00eda con la temperatura en l\u00edquidos y s\u00f3lidos, y en los vapores tambi\u00e9n depende de la presi\u00f3n. Los metales, al ser s\u00f3lidos con estructura cristalina, poseen alta conductividad el\u00e9ctrica y t\u00e9rmica, adem\u00e1s de alta densidad. El transporte de energ\u00eda t\u00e9rmica en los metales puede deberse a dos efectos: la migraci\u00f3n de electrones libres y las ondas de vibraci\u00f3n de la red cristalina (fonones).<\/p>\n<p>Es importante destacar que la correlaci\u00f3n entre conductancia el\u00e9ctrica y t\u00e9rmica no se mantiene en materiales no met\u00e1licos, donde el transporte de calor por fonones adquiere mayor importancia.<\/p>\n<h2>Conclusi\u00f3n<\/h2>\n<p>En resumen, mientras que la conductividad el\u00e9ctrica y t\u00e9rmica en metales est\u00e1n relacionadas y var\u00edan con la temperatura de acuerdo con la ley de Wiedemann-Franz, esta relaci\u00f3n no se mantiene en otros materiales. Esta comprensi\u00f3n es esencial para aplicaciones en f\u00edsica y ingenier\u00eda, donde el manejo adecuado de estas propiedades es crucial.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.electricity-magnetism.org\/wp-content\/uploads\/2022\/01\/logo.png\" alt=\"Electrical and Thermal Conductivity\" \/><\/p>\n<div style=\"text-align: center; font-size: 20px;\">\n    <a href=\"https:\/\/www.electricity-magnetism.org\/electrical-and-thermal-conductivity\/\">Original Article<\/a>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A una temperatura determinada, las conductividades t\u00e9rmica y el\u00e9ctrica de los metales son proporcionales, pero aumentar la temperatura aumenta la conductividad t\u00e9rmica y disminuye la conductividad el\u00e9ctrica.<\/p>\n","protected":false},"author":1,"featured_media":1582,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[9],"tags":[],"class_list":["post-80161","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sin-categorizar","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - 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