Hōʻike huahana: graphite
He palupalu ka pauka Graphite, ʻeleʻele hina, momona a hiki ke hoʻohaumia i ka pepa. ʻO 1-2 ka paʻakikī, a hoʻonui i ka 3-5 me ka piʻi ʻana o nā haumia ma ke ala kū. ʻO ka gravity kiko'ī he 1.9-2.3. Ma lalo o ke kūlana o ka hoʻokaʻawale ʻana o ka oxygen, ʻoi aku kona wahi hoʻoheheʻe ma luna o 3000 ℃, ʻo ia kekahi o nā minerala pale wela loa. Ma ka lumi wela, paʻa nā waiwai kemika o ka pauka graphite, hiki ʻole ke hoʻoheheʻe ʻia i ka wai, dilute acid, dilute alkali a me nā mea hoʻoheheʻe organik; he kiʻekiʻe ka wela a me ka conductivity ka mea, a hiki ke hoʻohana ʻia e like me refractory, conductive material, wear-resistant and lubricating material.
Ma muli o kona kūlana kūikawā, loaʻa i ka graphite nā ʻano penei: 1. ʻO ke kūpaʻa wela kiʻekiʻe: ʻo ka helu hoʻoheheʻe o ka graphite ʻo 3850 ± 50 ℃, a ʻo ka paila he 4250 ℃. ʻO ia hoʻi, he liʻiliʻi loa ka nui o ka pohō kaumaha a me ka coefficient o ka hoʻonui wela i ka wā e hoʻohana ai i ka ultra-high temperature arc sintering, a piʻi ka ikaika o ka graphite me ka piʻi ʻana o ka mahana. Ma 2000 ℃, pālua ka ikaika o ka graphite. 2. Lubricity: pili ka lubricity o ka graphite i ka nui o ka graphite. ʻOi aku ka nui o ka pālākiō, ʻoi aku ka liʻiliʻi o ke koena friction, a ʻoi aku ka maikaʻi o ka hana lubrication. 3. Kemika paʻa: graphite i maikai kemika paʻa ma ka lumi wela, kū'ē i ka waika, alkali a me ka organic mea hoʻoheheʻe corrosion. 4. Plasticity: maikaʻi ka paʻakikī o ka graphite a hiki ke paʻi ʻia i loko o nā ʻāpana lahilahi. 5. Thermal shock resistance: ke hoʻohana ʻia ka graphite ma ka lumi wela, hiki iā ia ke pale i ka loli nui o ka mahana me ka ʻole o ka pōʻino. Ke piʻi koke ka mahana, ʻaʻole e loli nui ka leo o ka graphite a ʻaʻohe māwae.
Hoʻohana:
1. E like me refractory mea: graphite a me kāna mau huahana i nā hiʻohiʻona o ke kiʻekiʻe wela kū'ē a me ka ikaika kiʻekiʻe. Hoʻohana nui ʻia lākou no ka hana ʻanagraphite cruciblei loko o ka ʻoihana metallurgical, a ua hoʻohana mau ʻia e like me ka mea pale no ke kila ingot a me ka uhi ʻana o ka umu ahi.
2. E like me ka lole lubricating mea: hoʻohana pinepine ʻia ka graphite e like me ka lubricant i ka ʻoihana mīkini. ʻAʻole kūpono ka ʻaila lubricating no ka wikiwiki kiʻekiʻe, ka wela kiʻekiʻe a me ke kaomi kiʻekiʻe.
3. He paʻa kemika maikaʻi ka graphite. Hoʻohana nui ʻia ia i ka ʻoihana petrochemical, hydrometallurgy, acid-base production, synthetic fiber, papermaking a me nā ʻoihana ʻē aʻe, hiki ke mālama i ka nui o nā mea metala.
4. Hiki ke hoʻohana ʻia ka graphite e like me ke alakaʻi penikala, ka puaʻa a me ka mea hana polishing. Ma hope o ka hana kūikawā, hiki ke hana i ka graphite i nā mea kūikawā like ʻole no ka hoʻohana ʻana e nā keʻena ʻoihana kūpono.
Ka manawa hoʻouna: Mar-26-2021