ʻO ke kalapona kekahi o nā mea maʻamau i ke ʻano, e hoʻopuni ana i nā waiwai o nā mea āpau i loaʻa ma ka Honua.Hōʻike ia i nā ʻano like ʻole, e like me ka ʻokoʻa o ka paʻakikī a me ka palupalu, insulation-semiconductor-superconductor behavior, heat insulation-superconductivity, a me ka māmā absorption-complete transparency.Ma waena o kēia mau mea, ʻo nā mea me ka sp2 hybridization nā lālā nui o ka ʻohana material carbon, me ka graphite, carbon nanotubes, graphene, fullerenes, a me ka carbon glassy amorphous.
Nā laʻana kalapona Graphite a me Glassy
ʻOiai ua kaulana nā mea mua, e nānā kākou i ke kalapona aniani i kēia lā.ʻO ke kalapona aniani, ʻike ʻia hoʻi he kalapona aniani a i ʻole kalapona vitreous, hoʻohui i nā waiwai o ke aniani a me ka ceramics i loko o kahi mea kalapona non-graphitic.ʻAʻole e like me ka graphite crystalline, he mea kalapona amorphous kahi kokoke i 100% sp2-hybridized.Hoʻopili ʻia ke kalapona aniani e ka sintering wela kiʻekiʻe o nā pūhui organik mua, e like me ka resins phenolic a i ʻole nā resin furfuryl alcohol, ma lalo o kahi ea kinoea.ʻO kona ʻano ʻeleʻele a me ka ʻili aniani e like me ka aniani i loaʻa iā ia ka inoa ʻo "glassy carbon."
Mai kona hana mua ʻana e ka poʻe ʻepekema i ka makahiki 1962, ua aʻo nui ʻia ke ʻano a me nā waiwai o ke kalapona aniani a lilo i kumuhana wela ma ke kahua o nā mea kalapona.Hiki ke hoʻokaʻawale ʻia ke kalapona aniani i ʻelua ʻano: ʻano I a me Type II kalapona aniani.Hoʻopili ʻia ke kalapona aniani ʻano I mai nā precursors organik ma nā mahana ma lalo o 2000°C a loaʻa ka hapa nui o nā ʻāpana graphene i hoʻonohonoho pono ʻole ʻia.ʻO ke kalapona aniani ʻano II, ma ka ʻaoʻao ʻē aʻe, ua hoʻopaʻa ʻia i nā wela kiʻekiʻe (~ 2500°C) a hana i kahi matrix multilayered ʻekolu-dimensional amorphous i hui pū ʻia me ka fullerene-like spherical structures (e like me ka hōʻike ʻana ma ke kiʻi ma lalo).
Hōʻike Hōʻikeʻike ʻo Glassy Carbon Structure (hema) a me ke Kiʻi Microscopy Electron Hoʻonā kiʻekiʻe ('Ākau)
Ua ʻike ʻia ka noiʻi hou ʻana ʻo Type II glassy carbon e hōʻike ana i kahi ʻoi aʻe o ka compressibility ma mua o ka Type I, ka mea i hoʻopili ʻia i kāna mau hale spherical fullerene-like.Me nā ʻokoʻa geometric liʻiliʻi, ua haku ʻia nā matrices kalapona aniani ʻo Type I a me Type II me ka graphene curled disordered.
Hoʻohana ʻia o Glassy Carbon
Loaʻa iā Glassy carbon nā waiwai koʻikoʻi, me ka haʻahaʻa haʻahaʻa, ka paʻakikī kiʻekiʻe, ka ikaika kiʻekiʻe, ka impermeability kiʻekiʻe i nā kinoea a me nā wai, kiʻekiʻe ka wela a me ka paʻa kemika, e hoʻohana nui ʻia i nā ʻoihana e like me ka hana ʻana, kemika, a me ka uila.
01 Nā mea hoʻohana wela kiʻekiʻe
Hōʻike ke kalapona aniani i ke kūpaʻa wela kiʻekiʻe i loko o ke kinoea inert a i ʻole nā mea hoʻomehana honua, me ka pale ʻana i nā mahana a hiki i 3000°C.ʻAʻole e like me nā mea wela kiʻekiʻe a me ka metala, piʻi ka ikaika o ke kalapona aniani me ka mahana a hiki ke piʻi i 2700K me ka ʻole o ka palupalu.Loaʻa iā ia ka haʻahaʻa haʻahaʻa, haʻahaʻa haʻahaʻa wela, a me ka hoʻonui haʻahaʻa haʻahaʻa, kūpono ia no nā noi wela kiʻekiʻe, me nā paipu pale thermocouple, nā ʻōnaehana hoʻouka, a me nā ʻāpana umu.
02 Nā Hana Kemika
Ma muli o kona kūpaʻa kiʻekiʻe o ka corrosion, loaʻa ka carbon glassy i ka hoʻohana nui ʻana i ka nānā ʻana kemika.ʻO nā mea hana i hana ʻia mai ke kalapona aniani ʻoi aku ka maikaʻi ma mua o nā mea hana keʻena hana maʻamau i hana ʻia mai ka platinum, ke gula, nā metala kūpaʻa-corrosion ʻē aʻe, nā seramika kūikawā, a i ʻole nā fluoroplastics.ʻO kēia mau mea maikaʻi e pili ana i ka pale ʻana i nā mea hoʻoheheʻe pulu, ʻaʻohe hopena hoʻomanaʻo (adsorption uncontrolled and desorption of elements), ʻaʻohe contamination o nā mea hoʻohālike i kālailai ʻia, kūʻē i nā waikawa a me nā melts alkaline, a me kahi aniani porous ʻole.
03 ʻenehana niho
Hoʻohana mau ʻia nā pahu kalapona aniani i ka ʻenehana niho no ka hoʻoheheʻe ʻana i nā metala makamae a me nā alloys titanium.Hāʻawi lākou i nā pono e like me ka conductivity thermal kiʻekiʻe, ke ola lōʻihi i hoʻohālikelike ʻia me nā crucibles graphite, ʻaʻohe adhesion o nā metala makamae hoʻoheheʻe ʻia, ke kūpaʻa ʻana o ka wela, pili i nā metala makamae a me nā alloys titanium, ka hoʻohana ʻana i ka induction casting centrifuges, hana ʻana i nā lewa pale ma luna o nā metala hoʻoheheʻe, a me ka hoopau ana i ka pono o ka flux.
ʻO ka hoʻohana ʻana i nā kīʻaha kalapona aniani e hōʻemi ana i ka manawa wela a me ka hoʻoheheʻe ʻana a hiki i nā coils hoʻomehana o ka hui hoʻoheheʻe ke hana i nā haʻahaʻa haʻahaʻa ma mua o nā ipu seramika maʻamau, a laila e hoʻemi i ka manawa e pono ai no kēlā me kēia hoʻolei ʻana a hoʻonui i ke ola o ka crucible.Eia kekahi, ʻo kona non-wettability e hoʻopau i nā hopohopo poho waiwai.
04 Nā polokalamu Semiconductor
ʻO ke kalapona aniani, me kona maʻemaʻe kiʻekiʻe, kūʻē i ka corrosion kūʻokoʻa, ʻaʻohe o ka hoʻokumu ʻana o ka particle, conductivity, a me nā waiwai mechanical maikaʻi, he mea kūpono no ka hana semiconductor.Hiki ke hoʻohana ʻia nā crucibles a me nā waʻa i hana ʻia mai ke kalapona aniani no ka hoʻoheheʻe ʻana o nā ʻāpana semiconductor me ka hoʻohana ʻana i nā ala Bridgman a i ʻole Czochralski, synthesis o gallium arsenide, a me ka ulu aniani hoʻokahi.Eia hou, hiki i ke kalapona aniani ke lilo i mau ʻāpana i nā ʻōnaehana implantation ion a me nā electrodes i nā ʻōnaehana etching plasma.ʻO kāna ʻike X-ray kiʻekiʻe e hana i nā pahu kalapona aniani kūpono no nā substrates mask X-ray.
I ka hopena, hāʻawi ke kalapona aniani i nā waiwai kūʻokoʻa e pili ana i ke kūpaʻa wela kiʻekiʻe, ka inertness kemika, a me ka hana mechanical maikaʻi loa, e kūpono ana i nā ʻano noiʻi ma nā ʻoihana like ʻole.
E kelepona iā Semicera no nā huahana kalapona aniani maʻamau.
leka uila:sales05@semi-cera.com
Ka manawa hoʻouna: Dec-18-2023