Wehewehe Huahana: graphite
He palupalu ka pauka graphite, ʻeleʻele hina, momona a hiki ke hoʻohaumia i ka pepa. ʻO ka paʻakikī he 1-2, a piʻi aʻe i 3-5 me ka hoʻonui ʻia o nā haumia ma ke kuhikuhi kū pololei. ʻO ke kaumaha kikoʻī he 1.9-2.3. Ma lalo o ke kūlana o ka hoʻokaʻawale ʻana o ka oxygen, ʻoi aku kona kiko heheʻe ma mua o 3000 ℃, ʻo ia kekahi o nā minelala kūpaʻa loa i ka mahana. I ka mahana o ka lumi, paʻa loa nā waiwai kemika o ka pauka graphite, ʻaʻole hiki ke hoʻoheheʻe ʻia i ka wai, ka waikawa dilute, ka alkali dilute a me nā mea hoʻoheheʻe organik; loaʻa i ka mea ke kūpaʻa wela kiʻekiʻe a me ka conductivity, a hiki ke hoʻohana ʻia ma ke ʻano he refractory, conductive material, wear-resistant a me lubricating material.
Ma muli o kona ʻano kūikawā, loaʻa i ka graphite nā ʻano penei: 1. Ke kūpaʻa wela kiʻekiʻe: ʻo ke kiko heheʻe o ka graphite he 3850 ± 50 ℃, a ʻo ke kiko paila he 4250 ℃. ʻO ia hoʻi, he liʻiliʻi loa ka nui o ka pohō kaumaha a me ke koina o ka hoʻonui ʻana i ka wela i ka wā e hoʻohana ai i ka sintering arc wela kiʻekiʻe loa, a piʻi ka ikaika o ka graphite me ka piʻi ʻana o ka mahana. I ka 2000 ℃, ua pālua ka ikaika o ka graphite. 2. Lubricity: pili ka lubricity o ka graphite i ka nui o ka graphite. ʻO ka nui o ke unahi, ʻo ka liʻiliʻi o ke koina friction, a ʻoi aku ka maikaʻi o ka hana lubrication. 3. Paʻa kemika: he kūpaʻa kemika maikaʻi ka graphite i ka mahana o ka lumi, kū i ka waikawa, alkali a me ka palaho solvent organik. 4. Plasticity: he paʻakikī maikaʻi ka graphite a hiki ke paʻi ʻia i loko o nā pepa lahilahi. 5. Ke kūpaʻa haʻalulu wela: ke hoʻohana ʻia ka graphite i ka mahana o ka lumi, hiki iā ia ke kū i ka loli nui o ka mahana me ka ʻole o ka hōʻino. Ke piʻi koke ka mahana, ʻaʻole e loli nui ka nui o ka graphite a ʻaʻohe māwae.
Nā Hoʻohana:
1. Ma ke ʻano he mea refractory: loaʻa i ka graphite a me kāna huahana nā ʻano o ke kūpaʻa wela kiʻekiʻe a me ka ikaika kiʻekiʻe. Hoʻohana nui ʻia lākou no ka hana ʻanaipu hoʻoheheʻe graphitei ka ʻoihana metallurgical, a hoʻohana pinepine ʻia e like me ka mea pale no ka ingot kila a me ka uhi umu metallurgical.
2. Ma ke ʻano he mea lubricating pale ʻaʻahu: hoʻohana pinepine ʻia ka graphite ma ke ʻano he lubricating i ka ʻoihana mīkini. ʻAʻole kūpono ka ʻaila lubricating no ka wikiwiki kiʻekiʻe, ke ana wela kiʻekiʻe a me ke kaomi kiʻekiʻe.
3. He kūpaʻa kemika maikaʻi ko Graphite. Hoʻohana nui ʻia ia i ka ʻoihana petrochemical, hydrometallurgy, hana acid-base, fiber synthetic, hana pepa a me nā ʻoihana ʻē aʻe, hiki ke mālama i ka nui o nā mea metala.
4. Hiki ke hoʻohana ʻia ke graphite ma ke ʻano he penikala alakaʻi, pigment a me ka mea hoʻopili. Ma hope o ka hana kūikawā, hiki ke hana ʻia ke graphite i nā mea kūikawā like ʻole no ka hoʻohana ʻana e nā keʻena ʻoihana pili.
Ka manawa hoʻouna: Malaki-26-2021