No ke aha e alakaʻi ai ka pepa graphite i ka uila?
No ka mea, aia i loko o ka graphite nā uku e neʻe manuahi ana, neʻe manuahi nā uku ma hope o ka hoʻohele uila ʻana e hana i ke au, no laila hiki iā ia ke alakaʻi i ka uila. ʻO ke kumu maoli no ke alakaʻi ʻana o ka graphite i ka uila, ʻo ia ka mea e kaʻana like ana nā ʻātoma kalapona 6 i 6 mau electrons e hana i kahi pilina ∏66 nui me 6 mau electrons a me 6 mau kikowaena. I loko o ke apo kalapona o ka papa like o ka graphite, hana nā apo 6-lālā āpau i kahi ʻōnaehana hoʻohui ∏-∏. I nā huaʻōlelo ʻē aʻe, i loko o ke apo kalapona o ka papa like o ka graphite, hana nā ʻātoma kalapona āpau i kahi pilina ∏ nui, a hiki i nā electrons āpau i loko o kēia pilina ∏ nui ke kahe manuahi i loko o ka papa, ʻo ia ke kumu e hiki ai i ka pepa graphite ke alakaʻi i ka uila.
He ʻano lamellar ka Graphite, a aia nā electrons manuahi i hoʻopaʻa ʻole ʻia ma waena o nā papa. Ma hope o ka hoʻolohi ʻana, hiki iā lākou ke neʻe i ke kuhikuhi. ʻAneʻane nā mea āpau e alakaʻi i ka uila, he mea wale nō ia o ka resistivity. Hoʻoholo ke ʻano o ka graphite he mea liʻiliʻi loa ia i waena o nā mea kalapona.
Kumumanaʻo alakaʻi o ka pepa graphite:
He ʻātoma tetravalent ke kalapona. Ma kekahi ʻaoʻao, e like me nā ʻātoma metala, nalowale maʻalahi nā electrons waho loa. ʻOi aku ka liʻiliʻi o nā electrons waho o ke kalapona. Ua like loa ia me nā metala, no laila he conductivity uila kona. , e hoʻopuka ʻia nā electrons manuahi a me nā lua e pili ana. Me nā electrons waho e hiki ai i ke kalapona ke nalowale maʻalahi, ma lalo o ka hana o ka ʻokoʻa hiki, e neʻe a hoʻopiha i nā lua. E hana i kahi kahe o nā electrons. ʻO kēia ke kumumanaʻo o nā semiconductors.
Ka manawa hoʻouna: Malaki-14-2022