Nā Kuʻi Kipi

Nā Kuʻi Kipihāʻawi i kahi ʻano waiwai e hoʻolilo iā lākou i koho kiʻekiʻe no nā noi wela kiʻekiʻe, ʻoi loa i ka hoʻoheheʻe metala a me ka hana hana. Eia nā waiwai waiwai nui a me nā kikoʻī e wehewehe i ka hana o kēia mau crucibles:

1. ʻO ka hoʻoili wela
   • ʻO nā kīʻaha graphitee hōʻike ana i ka hoʻoili wela maikaʻi, e hōʻoia i ka hāʻawi like ʻana i ka wela. Hoʻemi kēia waiwai i nā wahi wela a hōʻoia i ka hoʻoheheʻe ʻana, e hana maikaʻi loa ia no nā metala e like me ke gula, ke keleawe, a me ka alumini.
   • Hiki i ka conductivity thermal ke hiki i nā waiwai a hiki i 100 W/m·K, ʻoi aku ka maikaʻi ma mua o nā mea refractory kuʻuna.
2. Kū'ē Kūlana Kiʻekiʻe
   • ʻO nā kīʻaha graphitehiki iā lākou ke kū i nā wela kiʻekiʻe loa, a hiki i 1700°Ci loko o nā lewa inert a i ʻole nā ​​kūlana vacuum. Hāʻawi kēia iā lākou e mālama i ka pono o ke kūkulu ʻana i nā kaiapuni koi ʻole me ka hoʻohaʻahaʻa ʻole.
   • Paʻa kēia mau crucibles a kūpaʻa i ka deformation ma lalo o ka wela nui.
3. Kaumaha haʻahaʻa o ka hoʻonui wela
   • Loaʻa i nā mea graphite aka helu haʻahaʻa o ka hoʻonui wela(e like me 4.9 x 10^-6 /°C), e hōʻemi ana i ka pōʻalo a i ʻole ka haʻalulu wela ke ʻike ʻia i nā loli wikiwiki.
   • Hana kēia hiʻohiʻona i nā crucibles graphite kūpono loa no nā kaʻina hana e pili ana i ka hoʻomehana ʻana a me nā pōʻai hoʻomaha.
4. Pale ʻino
   • ʻO ka graphite he mea kemika a hāʻawike kū'ē kiʻekiʻe i ka hapa nui o nā waikawa, alkalis, a me nā mea ʻino ʻē aʻe, ʻoi loa i ka hoʻohaʻahaʻa ʻana a i ʻole ke kū ʻole o ka lewa. He mea kūpono kēia i nā crucibles graphite no nā kaiapuni kemika koʻikoʻi i ka hoʻolei metala a hoʻomaʻemaʻe paha.
   • Hiki ke hoʻonui hou ʻia ke kūʻē ʻana o ka mea i ka oxidation e nā uhi a i ʻole nā ​​hana kūikawā, e hōʻoia ana i ka lōʻihi o ke ola lawelawe.
5. Hoʻolima Uila
   • Ma ke ʻano he conductor maikaʻi o ka uila, kūpono nā mea graphite no nā noi hoʻomehana induction. Hiki i ka conductivity uila kiʻekiʻe ke hoʻohui maikaʻi me nā ʻōnaehana induction, e hōʻoiaʻiʻo ana i ka hoʻomehana wikiwiki a me ka like.
   • Pono pono kēia waiwai i nā kaʻina hana e pono aiinduction heat crucibles, ka hoʻonui ʻana i ka pono o ka hana ma nā ʻoihana e like me ka hana ʻana a i ʻole ka metallurgy.
6. Maʻemaʻe a me nā mea i haku ʻia
   • Kiʻekiʻe-maʻemaʻe kalapona graphite crucibles(hiki i ka 99.9% maemae) pono no nā noi kahi e pale ʻia ai ka hoʻohaumia ʻana metala, e like me ka hana ʻana i nā metala makamae a i ʻole nā ​​seramika holomua.
   • ʻO nā kīʻaha graphite silikinohoʻohui i nā waiwai o ka graphite a me ka silicon carbide, e hāʻawi ana i ka ikaika mechanical i hoʻonui ʻia, ka pale ʻana o ka oxidation, a me kahi helu heheʻe kiʻekiʻe, kūpono no nā kūlana hana koʻikoʻi.
7. Ka lōʻihi a me ka lōʻihi
   • Isostatically kaomi graphite crucibleshana ʻia e loaʻa i ka ʻano like ʻole a me ka ikaika, e hopena i ka lōʻihi o ke ola ʻana a me ka hōʻemi ʻana i ka hemahema o ka waiwai i ka wā o nā hana wela kiʻekiʻe. ʻOi aku ka kūpaʻa o kēia mau crucibles i ka erosion a me ka pōʻino mechanical.

8. Huina Kemika:

   • Kalapona (C): 20-30%
   • Kapili Silika (SiC): 50-60%
   • Alumina (Al2O3): 3-5%
   • ʻO nā mea ʻē aʻe: 3-5%
9. Nā Nui a me nā ʻano hoʻohālikelike
   • Loaʻa kā mākou graphite crucibles i nā ʻano nui a me nā hoʻonohonoho. Maigraphite crucibles liʻiliʻi(kūpono no ka hoʻāʻo ʻana i ka metala nui) i nā crucibles nui i hoʻolālā ʻia no ka hoʻoheheʻe ʻia ʻana o ka ʻoihana, hāʻawi mākou i nā hopena kūpono no kēlā me kēia noi.
   • ʻO nā kīʻaha graphite-lineda me na crucibles meninini spoutshiki ke hoʻopilikino ʻia i nā koi hoʻolei kikoʻī, e hōʻoiaʻiʻo ana i ka maʻalahi a me ka pono i ka lawelawe ʻana metala.