ʻO nā pono o nā mea graphite a me nā mea hoʻomehana uila no ka umu ahi

ʻO nā pono o nā mea graphite a me nā mea hoʻomehana uila no ka umu ahi

Me ka hoʻomaikaʻi ʻana i ke kiʻekiʻe o ka umu hoʻomaʻamaʻa ʻana i ka wela wela, ʻoi aku ka maikaʻi o ka mālama ʻana i ka wela wela, a ua aloha ʻia ka mālama wela wela e nā poʻe o ka ʻoihana ma muli o ke ʻano o nā pono e like me ka degassing, degreasing, oxygen free a me ka automation. Eia nō naʻe, ʻike ʻia he kūlana kiʻekiʻe ka umu wela wela no nā mea hoʻomehana uila, e like me ke kiʻekiʻe-mehana deformation, fracture Volatilization ua lilo i mea nui e kaohi ana i ka hoʻomohala ʻana okapuahi hau.
I mea e hoʻoponopono ai i kēia pilikia, huli ka ʻoihana i ka graphite.graphitehana ʻia me nā metala ʻē aʻe a loaʻa iā ia nā pōmaikaʻi maikaʻi ʻole. Ua hoʻomaopopo ʻia ua aneane kaulana ka graphite i nā ʻano like ʻole o nā umu hoʻomaʻamaʻa wela ma ke ʻano he mea hoʻomehana uila.
A laila nā pono o ka graphite vacuum heat treatment electric heating elements
1) ʻO ke kūpaʻa wela kiʻekiʻe: ʻo ka helu heheʻe o ka graphite he 3850 ± 50 ℃ a ʻo ka helu hoʻolapalapa he 4250 ℃. ʻOiai inā ua puhi ʻia e ka ultra-high temperature arc, liʻiliʻi loa ka pohō kaumaha a liʻiliʻi loa ka coefficient o ka hoʻonui wela. Piʻi ka ikaika o ka graphite me ka piʻi ʻana o ka mahana. Ma 2000 ℃, pālua ka ikaika o ka graphite.
2) Conductivity a me thermal conductivity: ʻo ka conductivity o ka graphite he 100 mau manawa kiʻekiʻe ma mua o nā mineral non-metallic maʻamau. ʻOi aku ka hana wela ma mua o ke kila, ka hao, ke kēpau a me nā mea metala ʻē aʻe. Ke emi nei ka hoʻoili wela me ka piʻi ʻana o ka mahana. ʻOiai ma ka wela kiʻekiʻe loa, lilo ka graphite i mea hoʻokaʻawale. Hiki i ka graphite ke hoʻokele i ka uila no ka mea, ʻo kēlā me kēia kalapona kalapona i loko o ka graphite e hana i ʻekolu mau paʻa covalent me kekahikalaponanā ʻātoma, a ʻo kēlā me kēia ʻātoma kalapona e hoʻopaʻa mau i hoʻokahi electron manuahi e hoʻoili i ka uku.
3) Lubricity: pili ka lubrication o ka graphite i ka nui o ka graphite scale. ʻOi aku ka nui o ka pālākiō, ʻoi aku ka liʻiliʻi o ke koena friction, a ʻoi aku ka maikaʻi o ka hana lubrication. Paʻa kemika:graphiteHe kūpaʻa kemika maikaʻi ma ka lumi wela a hiki ke pale i ka ʻakika, alkali a me nā mea hoʻoheheʻe organik.
4) Plasticity: maikaʻi ka paʻakikī o ka graphite a hiki ke hoʻoheheʻe ʻia i ʻāpana lahilahi. ʻO ke kūpaʻa haʻalulu wela: ke hoʻohana ʻia ka graphite ma ke ana wela, hiki iā ia ke pale i ka loli nui o ka mahana me ka ʻole o ka pōʻino. Ke loli koke ka mahana, hoʻololi liʻiliʻi ka leo o ka graphite a ʻaʻole hiki mai nā māwae.
I ka hoʻolālā ʻana a me ka hoʻoponopono ʻana i ka umu, pono mākou e noʻonoʻo e loli iki ke kūʻē o ka mea hoʻomehana uila me ka mahana a paʻa ka resistivity, no laila ʻo ka graphite ka mea makemake.