ʻO nā mea hoʻopihapiha Graphite nā mea hana i haku ʻia me ka graphite ma ke ʻano he kumu kumu a hui pū ʻia me nā mea kōkua ʻē aʻe. Hoʻohana nui ʻia lākou i ka hoʻopaʻa ʻana, lubrication, conductivity uila, a me ke kūpaʻa corrosion. ʻO kā lākou hana koʻikoʻi e hilinaʻi nui i ka haku ʻana a me ka ratio o kā lākou mau mea nui, ʻoi aku ka maikaʻi o ka graphite ponoʻī a me nā mea hoʻohui i hui pū ʻia me ia.
ʻO ka Graphite: ʻO ka mea nui o nā mea hoʻopihapiha Graphite
ʻO ka graphite ka mea nui o nā mea hoʻopihapiha graphite, maʻamau ka 60% a i ka 95% o ka hoʻopihapiha holoʻokoʻa, me ka ʻāpana kikoʻī e pili ana i nā koi noi. Hiki ke hoʻohana ʻia ka graphite kūlohelohe a me ka synthetic ma ke ʻano he kumu, akā ʻokoʻa kā lākou microstructure a me nā waiwai. ʻO ka graphite kūlohelohe (e like me ka flake graphite) he ʻano ʻano ʻano aniani me nā kaula waena nawaliwali, e maʻalahi ai ka delaminate, e hopena i ka lubrication ponoʻī maikaʻi loa. ʻO ka ʻokoʻa, ʻoi aku ka maʻemaʻe o ka graphite synthetic (e like me ke kiʻekiʻe -mehana calcined petroleum coke-based graphite) a he haʻahaʻa haʻahaʻa ka maʻiʻo haumia, kūpono ia no nā noi e koi ana i ka paʻa kemika.
ʻO nā waiwai maikaʻi loa o ka graphite e hoʻopiha ai ia:
1.
Lubrication pono'ī: Hehe maʻalahi nā papa graphite ma waena o kekahi, e hōʻemi ana i ka ʻaʻahu ma lalo o ke kuʻemaka maloʻo a i ʻole ka -lubrication haʻahaʻa.
2.
Kū'ē Kūlana Kiʻekiʻe: Hiki i ka Graphite ke hana paʻa a hiki i ka 450 degere i ka ea a ma luna o 3000 degere i ke kinoea inert.
3.
Paʻa Kemika: Hōʻike ka Graphite i ke kūʻē maikaʻi ʻana i ka hapa nui o nā pāpaʻi kemika, koe naʻe nā waikawa oxidizing ikaika (e like me ka waikawa nitric concentrated a me ka waikawa sulfuric).
4.
Conductivity: Loaʻa i ka Graphite ka conductivity uila maikaʻi loa, kūpono ia no ka hoʻopili conductive a i ʻole nā noi antistatic.
Nā mea kōkua: Ki no ka hoʻomaikaʻi ʻana i ka hana holoʻokoʻa
ʻOiai ʻo ka graphite ka mea mua, paʻakikī pinepine nā mea hoʻopiha graphite maʻemaʻe e hoʻokō i nā koi o nā kūlana hana paʻakikī. No laila, hoʻohui pinepine ʻia nā mea kōkua e hoʻomaikaʻi i kā lākou hana. Aia nā mea kōkua maʻamau:
1. Nā mea hoʻopaʻa (e like me nā resins, rubbers, a me nā oxides metala)
Hoʻonui ka Binders i ka ikaika mechanical a me ka formability o nā mea hoʻopihapiha graphite, e kūpono iā lākou no nā ʻano hana hana like ʻole (e like me ka molding, extrusion, a impregnation). ʻo kahi laʻana:
• Nā mea hoʻopaʻa Resin (e like me nā resins phenolic a me nā resins epoxy): Hoʻonui lākou i ka paʻakikī o ka mea hoʻopihapiha a me ke kūpaʻa kemika, no laila kūpono lākou no ka sila paʻa.
• Nā mea hoʻopaʻa Rubber (e like me ka nitrile rubber a me ka fluororubber): Hoʻonui i ka maʻalahi a me ka hana hoʻopaʻa hoʻopaʻa ʻana, kūpono no ka hoʻopaʻa ʻana a i ʻole nā sila rotary.
• ʻO nā ʻokikiha metala (e like me ka zinc oxide a me ka alumini ʻokikene): E hoʻomaikaʻi i ka hoʻoheheʻe wela a me ka -kiʻekiʻe o ka wela.
2. Hoʻoikaika i nā fiber (e like me ka fiber carbon, fiber glass, a me ka fiber aramid):
No ka hoʻomaikaʻi ʻana i ka ikaika mechanical a me ke kūpaʻa ʻana o nā mea hoʻopihapiha graphite, hoʻohui pinepine ʻia nā fibers. ʻo kahi laʻana:
• ʻO ke kalapona kalapona: Hoʻohui i ka ikaika kiʻekiʻe a me ka -kiʻekiʻe i ka wela, kūpono i ka -mahanahana kiʻekiʻe a me ke kiʻekiʻe-kaiapili sila.
• ʻO ke aniani fiber: ʻO ke kumu kūʻai haʻahaʻa a hoʻomaikaʻi i ka pale waimaka o ka mea hoʻopihapiha.
• Aramid fiber: Hāʻawi i ka pale lole kiʻekiʻe loa a me ka ikaika tensile, kūpono no nā kūlana hana koʻikoʻi.
3. Nā Lubricants Paʻa (e like me Molybdenum Disulfide a me Polytetrafluoroethylene (PTFE))
I loko o kekahi mau palapala hoʻoheheʻe kiʻekiʻe a haʻahaʻa paha, ʻaʻole hiki i ka graphite ke hāʻawi i ka lubrication lawa, no laila ua hoʻohui ʻia nā lubricants paʻa ʻē aʻe:
• Molybdenum Disulfide (MoS₂): Hana maikaʻi ma lalo o nā wela kiʻekiʻe a me nā ukana kiʻekiʻe, hoʻohana pinepine ʻia me ka graphite.
• Polytetrafluoroethylene (PTFE): He haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa a kūpono ia no ka hoʻopaʻa ʻana i nā noi e koi ana i ka haʻahaʻa haʻahaʻa.
Hoʻoponopono hoʻonohonoho o nā mea hoʻopiha graphite kūikawā
Hiki ke hoʻopili ʻia ke ʻano o nā mea hoʻopihapiha graphite e kūpono i nā noi like ʻole:
• Po'i -Papa Ho'opiha Graphite: Ho'ohui 'ia nā pauka metala e like me ka nickel a me ke kala no ka ho'omaika'i 'ana i ka 'akika a me ke kūpale alkali.
• Hoʻopiha Graphite Conductive: Hoʻonui ʻia ka maʻemaʻe graphite a hoʻohui ʻia ka pauka keleawe a i ʻole carbon nanotubes e hoʻomaikaʻi i ka conductivity.
• High-Purity Graphite Fillers: High-purity (>99%) hoʻohana ʻia ka graphite synthetic e hōʻemi i nā haumia, e hoʻokō i nā koi o ka semiconductor a me nā ʻoihana nuklea.
Hoʻokumu mua ʻia nā mea hoʻopiha graphite me ka graphite, me ka hana i hoʻopaʻa ʻia ma o ka hoʻohālikelike ʻepekema o nā mea kōkua e like me nā binders, reinforcing fibers, a me nā lubricants paʻa. ʻO ka hana hope loa e pili ana i ke ʻano o ka graphite (kūlohelohe a i ʻole synthetic), kona maʻemaʻe, a me ke koho ʻana i nā ʻāpana composite. Me ka holomua o ka ʻenehana ʻenehana, e hoʻomaʻemaʻe hou ʻia ka haku ʻana o nā mea hoʻopihapiha graphite e hoʻokō i nā koi koʻikoʻi o ka ʻenehana aerospace, ikehu a me nā ʻoihana kemika, a me nā mea hana kiʻekiʻe.
