{"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":"grafiet-elektrische-weerstand","status":"publish","type":"post","link":"https:\/\/jinsuncarbon.com\/nl\/grafiet-elektrische-weerstand\/","title":{"rendered":"Grafiet elektrische weerstand begrijpen"},"content":{"rendered":"<p>De elektrische weerstand van grafiet is een fysische grootheid die de geleidbaarheid aangeeft. Deze methode is de techniek om geleidbaarheid in verschillende grafietmaterialen effectief te beoordelen. De elektrische weerstand van grafiet heeft betrekking op de grootte van de weerstand per lengte-eenheid en wordt over het algemeen uitgedrukt in ohm-meter, afgekort als \u03a9-m.<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 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\">Inhoudsopgave<\/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=\"Toggle tabel met inhoud\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Schakel<\/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\/nl\/grafiet-elektrische-weerstand\/#Graphite_Electrical_Resistivity_Measurement\" >Grafiet Elektrische weerstandsmeting<\/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\/nl\/grafiet-elektrische-weerstand\/#Temperature_dependence_analysis\" >Analyse temperatuurafhankelijkheid<\/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\/nl\/grafiet-elektrische-weerstand\/#The_following_table_shows_the_resistance_of_different_graphite_materials\" >De volgende tabel toont de weerstand van verschillende grafietmaterialen<\/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\/nl\/grafiet-elektrische-weerstand\/#Factors_affecting_graphite_electrical_resistivity\" >Factoren die de elektrische weerstand van grafiet be\u00efnvloeden<\/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\/nl\/grafiet-elektrische-weerstand\/#Material_purity\" >Materiaalzuiverheid<\/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\/nl\/grafiet-elektrische-weerstand\/#Grain_size_and_orientation\" >Korrelgrootte en ori\u00ebntatie<\/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\/nl\/grafiet-elektrische-weerstand\/#Structural_defects\" >Structurele gebreken<\/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\/nl\/grafiet-elektrische-weerstand\/#Comparison_of_the_electrical_conductivity_of_graphite_and_copper\" >Vergelijking van de elektrische geleidbaarheid van grafiet en koper<\/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\/nl\/grafiet-elektrische-weerstand\/#Conclusion\" >Conclusie<\/a><\/li><\/ul><\/nav><\/div>\n\n<h2><span class=\"ez-toc-section\" id=\"Graphite_Electrical_Resistivity_Measurement\"><\/span>Grafiet Elektrische weerstandsmeting<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Vier-sonde methode<\/strong><\/p>\n<p>De vier-sondemethode wordt het meest gebruikt in het laboratorium met een zeer nauwkeurige meetmethode. Vier sondes, druk de stroom op het monster om de weerstand te berekenen door het spanningsverschil te meten. Het voordeel van de vier-sondemethode is het vermijden van de invloed van contactweerstand, de meetnauwkeurigheid is zeer hoog en kan worden toegepast op monsters in de vorm van bulk en dunne film.<\/p>\n<p><strong><b>Methode met twee sondes<\/b><\/strong><\/p>\n<p>Bij de twee-sondemethode wordt de stroom direct toegepast op beide uiteinden van het monster en wordt de spanning gemeten. Bereken de totale weerstand. Het voordeel van de twee-sondemethode is dat deze eenvoudig en gemakkelijk te bedienen is. Bovendien is de twee-sondemethode ook geschikt voor snelle en veeleisende meetscenario's.<\/p>\n<p><strong><b>Methode met hete draad<\/b><\/strong><\/p>\n<p>De gloeidraadmethode maakt gebruik van stroom om de gloeidraad of spoel in het monster te verhitten om zo de weerstandskenmerken te meten die veranderen door temperatuur. Deze methode bestudeert ook de geleidbaarheid onder hoge temperatuur van verschillende materialen.<\/p>\n<p><strong><b>Methode met vier sondes bij hoge temperatuur<\/b><\/strong><\/p>\n<p>Het weerstandsvermogen onder de omstandigheden van een omgeving met hoge temperatuur kan met deze methode worden getest. De vier-sondemethode voor hoge temperaturen combineert de oven voor hoge temperaturen met een apparaat met vier sondes voor prestatie-evaluatie bij hoge temperaturen.<\/p>\n<p><strong><b>Contactweerstandsmethode<\/b><\/strong><\/p>\n<p>De contactweerstandmethode wordt meestal gebruikt voor nauwkeurig laboratoriumonderzoek. Een van de nauwkeurige metingen die gebruikt wordt om de weerstand van een monster te testen is het gebalanceerde meetcircuit van de brug van Wheatstone.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Temperature_dependence_analysis\"><\/span>Analyse temperatuurafhankelijkheid<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Analyse van de temperatuurafhankelijkheid kan de regel van veranderende weerstand met temperatuur in grafietmateriaal bestuderen, de stabiele en gerelateerde geleidende eigenschap van grafiet verkrijgen en gegevensondersteuning bieden voor het toepassen van materialen bij hoge temperaturen.<\/p>\n<p>&nbsp;<\/p>\n<h5><span class=\"ez-toc-section\" id=\"The_following_table_shows_the_resistance_of_different_graphite_materials\"><\/span>De volgende tabel toont de weerstand van verschillende grafietmaterialen<span class=\"ez-toc-section-end\"><\/span><\/h5>\n<table>\n<tbody>\n<tr>\n<td width=\"213\">Type grafietmateriaal<\/td>\n<td width=\"213\">Weerstandsvermogen (1000\u00b0C) \/ \u03a9-m<\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Grafiet met hoge dichtheid<\/td>\n<td width=\"213\">\uff086.4\u00b10.9\uff09\u00d710<sup>-6\u00a0<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Grove deeltjesstructuur grafiet<\/td>\n<td width=\"213\">\uff089.2\u00b11.4\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Fijnkorrelig grafiet<\/td>\n<td width=\"213\">\uff0812.9\u00b12.6\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Grafietelektrode<\/td>\n<td width=\"213\">\uff087.5\u00b10.7\uff09\u00d710<sup>-6<\/sup><\/td>\n<\/tr>\n<tr>\n<td width=\"213\">Poreus grafiet<\/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>Factoren die de elektrische weerstand van grafiet be\u00efnvloeden<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Material_purity\"><\/span>Materiaalzuiverheid<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Hoe minder onzuiverheden een materiaal bevat, hoe lager de weerstand is<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Grain_size_and_orientation\"><\/span>Korrelgrootte en ori\u00ebntatie<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong><b>Korrelgrootte<\/b><\/strong><\/p>\n<p>De elektrische weerstand van grafiet is sterk afhankelijk van de korrelgrootte en -ori\u00ebntatie. Grotere korrels verminderen het verstrooiingseffect van de korrelgrenzen en maken meer continu\u00efteit van het geleidende pad mogelijk, waardoor de weerstand afneemt; omgekeerd hebben kleinere korrels meer korrelgrenzen, waardoor elektronen vaker verstrooid worden en de weerstand toeneemt.<\/p>\n<p><strong><b>Ori\u00ebntatie<\/b><\/strong><\/p>\n<p>Grafiet is een <a href=\"https:\/\/en.wikipedia.org\/wiki\/Anisotropy\" target=\"_blank\" rel=\"noopener\">anisotroop<\/a> materiaal, met een lage weerstand voor de elektronenstroom langs het laagvlak (a-b-vlak) en langs lage weerstand. De weerstand neemt daarentegen aanzienlijk toe door de van der Waals-kracht loodrecht op het laagvlak (c-as). Daarom geldt: hoe groter de korrel en hoe dichter de korrelori\u00ebntatie bij de stroomrichting, hoe lager de weerstand van grafiet.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Structural_defects\"><\/span>Structurele gebreken<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong><b>Roosterdefecten<\/b><\/strong><\/p>\n<p>Puntdefecten in grafiet, zoals vacatures en onzuiverheidsatomen, vernietigen het volledige \u03c0-bindsysteem van koolstofatomen, blokkeren de vrije beweging van elektronen binnen een laag en verhogen zo de weerstand.<\/p>\n<p><strong><b>Korrelgrensdefecten<\/b><\/strong><\/p>\n<p>De aanwezigheid van korrelgrenzen verhoogt de elektronenverstrooiing, waardoor de elektronenstroom door de korrels wordt gehinderd en de weerstand toeneemt. Hoe groter het aantal korrelgrenzen of hoe kleiner de korrelgrootte, hoe geprononceerder dit effect wordt.<\/p>\n<p><strong><b>Tussenlaagdefecten<\/b><\/strong><\/p>\n<p>Deze dislocatie, rimpel of spleet tussen lagen zou de geleiding tussen grafiet <a href=\"https:\/\/en.wikipedia.org\/wiki\/Graphite\" target=\"_blank\" rel=\"noopener\">lagen<\/a>waardoor elektronen moeilijker langs de c-as stromen en de weerstand verticaal aanzienlijk toeneemt.<\/p>\n<p><strong><b>Poreusheid en scheuren<\/b><\/strong><\/p>\n<p>Pori\u00ebn en scheuren in het product maken het effectieve geleidende oppervlak van grafiet kleiner, het pad van de stroom langer, wat leidt tot een hogere weerstand.<\/p>\n<p><strong><b>Temperatuur<\/b><\/strong><\/p>\n<p>Het kan worden waargenomen dat als het branden of<a href=\"https:\/\/jinsuncarbon.com\/nl\/wat-is-grafitisatie\/\"> grafitisatie<\/a> temperatuur toeneemt, neemt de soortelijke weerstand van het product geleidelijk af. De redenen voor de afname zijn echter verschillend. Tijdens het roosteren wordt de daling van de specifieke weerstand voornamelijk veroorzaakt door het vrijkomen van vluchtige stoffen, verkooksing van bindmiddelen en het voortdurend krimpen van het product. Tijdens het grafitisatiestadium werd de daling van de specifieke weerstand veroorzaakt door de transformatie van amorfe koolstof in <a href=\"https:\/\/jinsuncarbon.com\/nl\/wat-is-grafiet-en-waarvan-is-grafiet-gemaakt\/\">grafiet<\/a> kristalstructuur.<\/p>\n<p><strong><b>Externe druk<\/b><\/strong><\/p>\n<p>De externe druk verhoogt de verdichting van het materiaal door de pori\u00ebn van de grafietstructuur samen te drukken. De druk be\u00efnvloedt ook de rangschikking van grafietkristallagen en verlaagt de weerstand in c-asrichting. In het algemeen wordt de externe druk weerspiegeld in het verminderen van de porositeit, het verbeteren van de korrelverbinding en het verbeteren van de tussenlaagindeling.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Comparison_of_the_electrical_conductivity_of_graphite_and_copper\"><\/span>Vergelijking van de elektrische geleidbaarheid van grafiet en koper<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bij normale temperaturen heeft koper een hoger geleidingsvermogen dan grafiet, maar bij hoge temperaturen heeft grafiet nog steeds een hoger geleidingsvermogen dan koper.<\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusie<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Weerstand heeft een groot effect op de elektrische eigenschappen van grafiet. Elektrische weerstand is een van de kritieke factoren die de elektrische eigenschappen van grafiet bepalen. Hoe kleiner het geleidingsvermogen van grafiet, hoe beter het geleidingsvermogen en hoe lager het energieverbruik.<\/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>\n","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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