Ngā Rōra Ukume Alumina: Ngā Mahi Maha e Whakakaha ana i te Hiranga Ahumahi Pāmahana-Tiketike

I roto i te hangahanga i te pāmahana tiketike, he pumau tonu te hiahia mō ngā wāhanga pakari, pono hoki.Ngā roera uku aluminatū motuhake, e whakamahi ana i ngā āhuatanga tino pai hei whakanui ake i te whai huatanga puta noa i ngā ahumahi—mai i te whakamahana karāhe ki te hanga haurua-ira. Ka tautuhi anō ēnei wāhanga pakari i te mahi i roto i ngā taiao tino kino. Me tūhuratia ā rātou tono matua e tino hiahiatia ai mō te hanga hou.
1. Taupānga Matua: Ngā Oimu Hanga Uku me te Karāhe

Ko ngā ahumahi uku me te karāhe ngā kaiwhakamahi matua, ā, ko ēnei roera te pou tuarā o ngā pūnaha oumu roera. I roto i te hanga taera uku, ngā taputapu horoi, me te hanga porcelain, ka tukuna ngā hua mā te tahu i te pāmahana teitei (tae atu ki te 1400°C+). Ko tō rātou kaha pāmahana teitei me te iti o te horapa wera ka ārai i te whakarerekētanga me te piko o te hua, ka whakarite i te kounga pumau.

Mō te hanga karāhe (te whakamahana, te whakamahana, te whakarewa), he tino pai ngā roera uku alumina i roto i ngā taiao oumu. Kāore i rite ki ngā momo konganuku kē atu, ka ātete rātou ki te waikura karāhe rewa, ā, ka mau tonu te pumau o ngā āhuatanga, ka taea ai te kawe maeneene i ngā pepa karāhe me te kore e poke—he mea nui mō te hanga karāhe hoahoanga me te karāhe whatu, ka whakanui ake i ngā hua me te whakaiti i te wā kore mahi.

2. Te Maimoatanga Wera me te Whakarewa i te Pāmahana-Tiketike

Ko te maimoatanga wera (whakamahana, tinei, whakahinuhinu) me whai wāhanga e tu atu ana ki ngā rerekētanga pāmahana me te wera nui. He whānuitia te whakamahinga o ngā roera uku alumina i roto i ngā oumu maimoatanga wera kore-ferrous (konutea, konumohe, parahi) me te koranu. Nā te ātete pai ki ngā ru wera (ngā huringa ohorere 500°C) me te ātete ki te waikura, he mea tino pai mō te kawe i ngā wahi mahi mā roto i ēnei tukanga.

I roto i te mahi whakarewa (te whakarewa kore-ferrous, te tukatuka kohuke), ka mahi rātou hei kawe ātete-kakahu. Me te pakeke Mohs o te 9 (tuarua anake ki te taimana), ka ātete rātou ki te pakū, ka roa ake te roa o te ora o ngā taputapu ki tua atu i ngā roera whakarewa tuku iho.

3. Te Hanganga Ārahi me te Hikohiko

Ka whakawhirinaki te umanga haurua-ira ki ngā wāhanga tino parakore, tino tika mō te hanga maramara iti. Ko ngā roera uku alumina, me te whakamarumaru hiko tino pai (te ātete rōrahi tae atu ki te 10¹⁴Ω・cm) me te iti o ngā poke, e whakamahia ana i roto i te whakahaere i ngā wafer. Ka taea e rātou te tika o te tūnga ±1μm, ka whakaiti i te poke me te whakapai ake i ngā hua maramara.

He pai hoki te āhua koretake o te matū mō ngā oumu whakawera wāhanga hiko, e kawe ana i ngā wāhanga tairongo (ngā pūnga, ngā ātete) me te kore tauhohenga, ā, he mea nui ēnei mō te umanga.

4. Te Hanga Pūngao Hou me te Pūhiko

I te puāwaitanga o te rāngai pūngao hou, he mea nui ēnei roera i roto i te hanga pākahiko—mai i te sintering cathode/anode ki te maimoatanga wera pūtau. Ka ātete rātou ki te 1600°C me te ātete ki te waikura electrolyte, ko te kawe wera iti ka whakarite i te pāmahana oumu ōrite, ka whakamana i te mahi me te haumaru o te pākahiko.

Ka whakamahia hoki ēnei i roto i te tukatuka pūtau wahie hauwai, hei ātete i te pakarukaru hauwai me te pupuri i te pumau i te pāmahana tiketike, hei tautoko i te tipu o te pūngao ma.

5. Ngā Taputapu Ātea me te Tika

E whakanuia ana e te umanga rererangi te mama (3.5g/cm³, haurua maitai) me te kaha teitei, e whakamahia ana i roto i te maimoatanga wera miihini me ngā tikanga amiorangi hei whakaiti i te taumaha me te pupuri i te kounga, te whakanui ake i te pai o te wahie me te kaha kawenga.

I roto i ngā taputapu tino tika (ngā taputapu whatu, ngā taputapu hauora), mā te tika o te taumata-micron (≤2μm te hapa roa mō ngā roera 200mm) ka maeneene te mahi. He pai hoki te hototahitanga koiora ki ngā whakamahinga hauora pērā i ngā whakatō niho.