{"id":6746,"date":"2024-11-23T10:34:03","date_gmt":"2024-11-23T10:34:03","guid":{"rendered":"https:\/\/jinsuncarbon.com\/?p=6746"},"modified":"2024-12-29T00:21:17","modified_gmt":"2024-12-29T00:21:17","slug":"elektrischer-widerstand-von-graphit","status":"publish","type":"post","link":"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/","title":{"rendered":"Verst\u00e4ndnis des elektrischen Widerstands von Graphit"},"content":{"rendered":"<p>Der elektrische Widerstand von Graphit ist ein Ma\u00df f\u00fcr eine physikalische Gr\u00f6\u00dfe, die seine Leitf\u00e4higkeit angibt. Mit dieser Methode l\u00e4sst sich die Leitf\u00e4higkeit verschiedener Graphitmaterialien effektiv beurteilen. Der elektrische Widerstand von Graphit bezieht sich auf die Gr\u00f6\u00dfe des Widerstands pro L\u00e4ngeneinheit und wird im Allgemeinen in Ohm-Meter, kurz \u03a9-m, angegeben.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Inhalts\u00fcbersicht<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Inhaltsverzeichnis umschalten\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Umschalten auf<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Graphite_Electrical_Resistivity_Measurement\" >Messung des elektrischen Widerstands von Graphit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Temperature_dependence_analysis\" >Analyse der Temperaturabh\u00e4ngigkeit<\/a><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><ul class='ez-toc-list-level-5' ><li class='ez-toc-heading-level-5'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#The_following_table_shows_the_resistance_of_different_graphite_materials\" >Die folgende Tabelle zeigt die Widerstandsf\u00e4higkeit der verschiedenen Graphitmaterialien<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Factors_affecting_graphite_electrical_resistivity\" >Faktoren, die den elektrischen Widerstand von Graphit beeinflussen<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Material_purity\" >Reinheit des Materials<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Grain_size_and_orientation\" >Korngr\u00f6\u00dfe und Ausrichtung<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Structural_defects\" >Strukturelle M\u00e4ngel<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Comparison_of_the_electrical_conductivity_of_graphite_and_copper\" >Vergleich der elektrischen Leitf\u00e4higkeit von Graphit und Kupfer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/jinsuncarbon.com\/de\/elektrischer-widerstand-von-graphit\/#Conclusion\" >Schlussfolgerung<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"Graphite_Electrical_Resistivity_Measurement\"><\/span>Messung des elektrischen Widerstands von Graphit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Vier-Sonden-Methode<\/strong><\/p>\n<p>Die Vier-Sonden-Methode ist die im Labor am h\u00e4ufigsten verwendete Messmethode mit hoher Pr\u00e4zision. Vier Sonden, dr\u00fccken Sie den Strom auf die Probe, um den spezifischen Widerstand durch Messung der Spannungsdifferenz zu berechnen. Der Vorteil der Vier-Sonden-Methode erfordert die Vermeidung des Einflusses von Kontaktwiderstand, die Messgenauigkeit ist sehr hoch, und kann auf die Proben in Form von Bulk-und D\u00fcnnschicht angewendet werden.<\/p>\n<p><strong><b>Zwei-Sonden-Methode<\/b><\/strong><\/p>\n<p>Bei der Methode mit zwei Sonden wird der Strom direkt an beiden Enden der Probe angelegt und die Spannung gemessen. Berechnen Sie den Gesamtwiderstand. Der Vorteil der Zwei-Sonden-Methode ist, dass sie einfach und leicht zu bedienen ist. Dar\u00fcber hinaus eignet sich die Zweif\u00fchler-Methode auch f\u00fcr schnelle und wenig anspruchsvolle Messszenarien.<\/p>\n<p><strong><b>Hei\u00dfer Draht Methode<\/b><\/strong><\/p>\n<p>Bei der Hitzdrahtmethode wird der Hitzdraht oder die Spule im Inneren der Probe mit Strom erhitzt, um die Merkmale des sich durch die Temperatur ver\u00e4ndernden Widerstands zu messen. Diese Methode untersucht auch die Leitf\u00e4higkeit verschiedener Materialien unter Hochtemperaturbedingungen.<\/p>\n<p><strong><b>Hochtemperatur-Vier-Sonden-Methode<\/b><\/strong><\/p>\n<p>Mit dieser Methode kann die Widerstandsf\u00e4higkeit unter den Bedingungen einer Hochtemperaturumgebung gepr\u00fcft werden. Die Hochtemperatur-Vier-Sonden-Methode kombiniert den Hochtemperaturofen mit einem Vier-Sonden-Ger\u00e4t zur Bewertung der Hochtemperaturleistung.<\/p>\n<p><strong><b>Kontaktwiderstandsmethode<\/b><\/strong><\/p>\n<p>Die Durchgangswiderstandsmethode wird meist f\u00fcr genaue Laboruntersuchungen verwendet. Eine der pr\u00e4zisen Messungen, die zur Pr\u00fcfung des Widerstands einer Probe verwendet werden, ist die symmetrische Wheatstone-Br\u00fccken-Messschaltung.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Temperature_dependence_analysis\"><\/span>Analyse der Temperaturabh\u00e4ngigkeit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Die Analyse der Temperaturabh\u00e4ngigkeit kann die Regel des sich mit der Temperatur \u00e4ndernden Widerstands im Graphitmaterial untersuchen, die stabile und damit zusammenh\u00e4ngende leitende Eigenschaft des Graphits ermitteln und Daten zur Unterst\u00fctzung der Anwendung von Materialien bei hohen Temperaturen liefern.<\/p>\n<p>&nbsp;<\/p>\n<h5><span class=\"ez-toc-section\" id=\"The_following_table_shows_the_resistance_of_different_graphite_materials\"><\/span>Die folgende Tabelle zeigt die Widerstandsf\u00e4higkeit der verschiedenen Graphitmaterialien<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<table>\n<tbody>\n<tr>\n<td width=\"213\">Art des Graphitmaterials<\/td>\n<td width=\"213\">Widerstandswert (1000\u00b0C) \/ \u03a9-m<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Hochdichter Graphit<\/td>\n<td width=\"213\">\uff086.4\u00b10.9\uff09\u00d710<sup>-6\u00a0<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Grobe Partikelstruktur Graphit<\/td>\n<td width=\"213\">\uff089.2\u00b11.4\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Feink\u00f6rniger Graphit<\/td>\n<td width=\"213\">\uff0812.9\u00b12.6\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Graphit-Elektrode<\/td>\n<td width=\"213\">\uff087.5\u00b10.7\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Por\u00f6ser Graphit<\/td>\n<td width=\"213\">\uff0812.0\u00b11.2\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><\/h2>\n<h2><\/h2>\n<h2><span class=\"ez-toc-section\" id=\"Factors_affecting_graphite_electrical_resistivity\"><\/span>Faktoren, die den elektrischen Widerstand von Graphit beeinflussen<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Material_purity\"><\/span>Reinheit des Materials<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Je weniger Verunreinigungen ein Material enth\u00e4lt, desto geringer ist sein spezifischer Widerstand.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Grain_size_and_orientation\"><\/span>Korngr\u00f6\u00dfe und Ausrichtung<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Gr\u00f6\u00dfe der K\u00f6rner<\/b><\/strong><\/p>\n<p>Der elektrische Widerstand von Graphit h\u00e4ngt wesentlich von der Korngr\u00f6\u00dfe und -orientierung ab. Gr\u00f6\u00dfere K\u00f6rner verringern den Streueffekt an den Korngrenzen und erm\u00f6glichen eine gr\u00f6\u00dfere Kontinuit\u00e4t der Leiterbahn, wodurch der Widerstand sinkt; umgekehrt haben kleinere K\u00f6rner mehr Korngrenzen, was zu h\u00e4ufigerer Elektronenstreuung f\u00fchrt und damit den Widerstand erh\u00f6ht.<\/p>\n<p><strong><b>Orientierung<\/b><\/strong><\/p>\n<p>Graphit ist ein <a href=\"https:\/\/en.wikipedia.org\/wiki\/Anisotropy\" target=\"_blank\" rel=\"noopener\">anisotrop<\/a> Material mit geringem Widerstand gegen den Elektronenfluss entlang der Schichtebene (a-b-Ebene) und entlang des geringen Widerstands. Im Gegensatz dazu steigt der Widerstand aufgrund der van-der-Waals-Kraft, die senkrecht zur Schichtebene (c-Achse) wirkt, erheblich an. Je gr\u00f6\u00dfer das Korn und je n\u00e4her die Kornorientierung an der Stromflussrichtung liegt, desto geringer ist der Widerstand von Graphit.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Structural_defects\"><\/span>Strukturelle M\u00e4ngel<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>Defekte des Gitters<\/b><\/strong><\/p>\n<p>Punktdefekte in Graphit, wie Leerstellen und Fremdatome, zerst\u00f6ren das vollst\u00e4ndige \u03c0-Bindungssystem der Kohlenstoffatome, blockieren die freie Bewegung der Elektronen innerhalb einer Schicht und erh\u00f6hen somit den spezifischen Widerstand.<\/p>\n<p><strong><b>Korngrenzendefekte<\/b><\/strong><\/p>\n<p>Das Vorhandensein von Korngrenzen erh\u00f6ht die Elektronenstreuung, behindert den Elektronenfluss durch die K\u00f6rner und f\u00fchrt zu einem erh\u00f6hten spezifischen Widerstand. Au\u00dferdem ist dieser Effekt umso ausgepr\u00e4gter, je gr\u00f6\u00dfer die Anzahl der Korngrenzen oder je kleiner die Korngr\u00f6\u00dfe ist.<\/p>\n<p><strong><b>Zwischenschichtdefekte<\/b><\/strong><\/p>\n<p>Diese Versetzungen, Falten oder L\u00fccken zwischen den Schichten w\u00fcrden die Leitf\u00e4higkeit zwischen Graphit <a href=\"https:\/\/en.wikipedia.org\/wiki\/Graphite\" target=\"_blank\" rel=\"noopener\">Schichten<\/a>Dadurch wird der Elektronenfluss entlang der c-Achse erschwert, was zu einem erheblichen Anstieg des Widerstandes in vertikaler Richtung f\u00fchrt.<\/p>\n<p><strong><b>Porosit\u00e4t und Risse<\/b><\/strong><\/p>\n<p>Durch Poren und Risse im Produkt wird die effektive leitf\u00e4hige Fl\u00e4che des Graphits kleiner und der Stromweg l\u00e4nger, was zu einem erh\u00f6hten spezifischen Widerstand f\u00fchrt.<\/p>\n<p><strong><b>Auswirkungen der Temperatur<\/b><\/strong><\/p>\n<p>Es ist zu beobachten, dass mit zunehmender Kalzinierung oder<a href=\"https:\/\/jinsuncarbon.com\/de\/was-ist-graphitierung\/\"> Graphitierung<\/a> Mit steigender Temperatur nimmt der spezifische Widerstand des Produkts allm\u00e4hlich ab. Die Gr\u00fcnde f\u00fcr die Abnahme sind jedoch unterschiedlich. In der R\u00f6stphase ist der R\u00fcckgang des spezifischen Widerstands haupts\u00e4chlich auf die Freisetzung fl\u00fcchtiger Stoffe, die Verkokung von Bindemitteln und das kontinuierliche Schrumpfen des Produkts zur\u00fcckzuf\u00fchren. W\u00e4hrend der Graphitierungsphase ist der R\u00fcckgang des spezifischen Widerstands auf die Umwandlung von amorphem Kohlenstoff in <a href=\"https:\/\/jinsuncarbon.com\/de\/was-ist-graphit-und-woraus-besteht-graphit\/\">Graphit<\/a> Kristallstruktur.<\/p>\n<p><strong><b>Externer Druck<\/b><\/strong><\/p>\n<p>Der \u00e4u\u00dfere Druck erh\u00f6ht die Verdichtung des Materials durch Komprimierung der Poren der Graphitstruktur. Der Druck beeinflusst auch die Anordnung der Graphitkristallschichten und verringert den spezifischen Widerstand in Richtung der c-Achse. Im Allgemeinen wirkt sich der \u00e4u\u00dfere Druck auf die Verringerung der Porosit\u00e4t, die Verbesserung der Kornverbindung und die Verbesserung der Anordnung der Zwischenschichten aus.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comparison_of_the_electrical_conductivity_of_graphite_and_copper\"><\/span>Vergleich der elektrischen Leitf\u00e4higkeit von Graphit und Kupfer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bei normalen Temperaturen hat Kupfer eine h\u00f6here Leitf\u00e4higkeit als Graphit; bei hohen Temperaturen hat Graphit jedoch immer noch eine h\u00f6here Leitf\u00e4higkeit als Kupfer.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Schlussfolgerung<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Der spezifische Widerstand hat einen gro\u00dfen Einfluss auf die elektrischen Eigenschaften von Graphit. Der elektrische Widerstand ist einer der entscheidenden Faktoren, die die elektrischen Eigenschaften von Graphit bestimmen. Je geringer der Widerstand von Graphit ist, desto besser ist seine Leitf\u00e4higkeit und desto geringer ist der Energieverbrauch.<\/p>","protected":false},"excerpt":{"rendered":"<p>Graphite electrical resistivity is an amount of a physical quantity, indicating its conductivity. This method is the technique for assessing conductivity in different graphite materials effectively. The graphite electric resistivity pertains to the size of the resistance per unit length and is generally expressed in ohm-meter, short as \u03a9\u00b7m. Graphite Electrical Resistivity Measurement Four-probe method [&hellip;]<\/p>","protected":false},"author":3,"featured_media":6755,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[],"class_list":["post-6746","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v19.2.1 (Yoast SEO v25.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Understanding Graphite Electrical Resistivity<\/title>\n<meta name=\"description\" content=\"Graphite electrical resistivity pertains to the size of the resistance per unit length and is generally expressed in ohm-meters, short as \u03a9\u00b7m\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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