I ka crystallography, ua kapa ʻia ke ʻano daimana ʻo ke ʻano aniani cubic daimana, i hana ʻia e ka hoʻopaʻa covalent o nā mana kalapona.ʻO ka nui o nā waiwai koʻikoʻi o ke daimana ka hopena pololei o ka sp³ covalent hoʻopaʻa ikaika e hana i kahi ʻano paʻa a me kahi helu liʻiliʻi o nā mana kalapona.Lawe ʻo Metal i ka wela ma o nā electrons manuahi, a ʻo kāna conductivity thermal kiʻekiʻe e pili ana me ka conductivity uila kiʻekiʻe.ʻO ka ʻokoʻa, hoʻokō ʻia ka hoʻoili wela i ke daimana e nā haʻalulu lattice (ʻo ia hoʻi, nā phonon).ʻO nā paʻa covalent ikaika loa ma waena o nā ʻātoma daimana e loaʻa i ka lattice crystal paʻa i ke alapine vibration kiʻekiʻe, no laila ʻoi aku ka kiʻekiʻe o kona ʻano Debye e like me 2,220 K.
No ka mea ʻoi aku ka haʻahaʻa o ka hapa nui o nā noi ma mua o ka wela Debye, liʻiliʻi ka hoʻopuʻi ʻana o ka phonon, no laila ʻoi aku ka liʻiliʻi o ke kūʻē ʻana i ka wela me ka phonon ma ke ʻano he mea liʻiliʻi.Akā, e hoʻopuehu ʻia nā phonon, a laila e hōʻemi ana i ka conductivity thermal, kahi ʻano kūlohelohe o nā mea aniani a pau.ʻO nā hemahema o ke daimana ka mea maʻamau e komo i nā pōʻino kiko e like me nā isotopes ˡ³C ʻoi aku ke kaumaha, nā haumia nitrogen a me nā hakahaka, nā hemahema lōʻihi e like me ka hoʻopaʻa ʻana i nā hewa a me nā dislocations, a me nā hemahema 2D e like me nā palena palaoa.
He ʻano tetrahedral maʻamau ka aniani daimana, kahi e hiki ai i nā ʻātoma kalapona 4 ke hana i nā paʻa covalent, no laila ʻaʻohe electrons manuahi, no laila ʻaʻole hiki i ke daimana ke alakaʻi i ka uila.
Eia kekahi, ua hoʻopili ʻia nā ʻātoma kalapona i ke daimana e nā paʻa ʻehā-valent.Ma muli o ka ikaika loa o ka paʻa CC i ke daimana, ua komo nā electrons valence āpau i ka hoʻokumu ʻana i nā paʻa covalent, e hana ana i kahi ʻano aniani pyramid, no laila ke kiʻekiʻe loa ka paʻakikī o ke daimana a kiʻekiʻe ka helu heheʻe.A ʻo kēia ʻano o ke daimana ka mea e hoʻomohu i nā kaula māmā, ʻike ʻia ka hapa nui o nā kukui i hoʻomālamalama ʻia i ke daimana, no laila, ʻoiai he paʻakikī loa, ʻike ʻia.
I kēia manawa, ʻo nā mea hoʻoheheʻe wela kaulana loa ka hapa nui o ka ʻohana nano-carbon material, menanodiamond, nano-graphene, graphene flakes, nano-graphite pauda, a me carbon nanotubes.Eia nō naʻe, ʻoi aku ka mānoanoa o nā huahana kiʻi ʻoniʻoni graphite wela a haʻahaʻa haʻahaʻa haʻahaʻa, he paʻakikī ke hoʻokō i nā koi hoʻoheheʻe wela o ka mana kiʻekiʻe e hiki mai ana.I ka manawa like, ʻaʻole ia e hoʻokō i nā koi kiʻekiʻe o ka poʻe no ka ultra-māmā a me ka lahilahi, ke ola pākaukau lōʻihi.No laila, he mea koʻikoʻi loa ka loaʻa ʻana o nā mea conductive super-thermal hou.Pono kēia mau mea i loaʻa ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, ultra-high thermal conductivity, a me ka māmā.Pono nā mea kalapona e like me ke daimana a me ka graphene i nā koi.Loaʻa iā lākou ka conductivity thermal kiʻekiʻe.ʻO kā lākou mau mea i hoʻohui ʻia he ʻano o ka conduction wela a me nā mea hoʻoheheʻe wela me ka hiki ke noi nui, a ua lilo lākou i mea nui o ka nānā.
Inā makemake ʻoe e ʻike hou aku e pili ana i kā mākou nanodiamonds, e ʻoluʻolu e hoʻokaʻaʻike i kā mākou limahana.
Ka manawa hoʻouna: Mei-10-2021