He rauemi ahumahi mahi-teitei te uku alumina, e mōhiotia ana mō tōna pakeke Mohs o te 9. Nā tēnei āhuatanga he mea pai mō ngā tono uaua, inā koa i raro i ngā āhuatanga o te pakū, te waikura, me te pāmahana teitei. Ka tūhuratia e tēnei tuhinga ngā takenga ā-tinana o tōna pakeketanga teitei me te hua o te mahi tino pai.
Ko te pakeketanga teitei o te uku alumina mai i tōna hanganga karaihe ahurei me te hononga matū. Ko tōna wāhanga matua, ko te α-alumina (α-Al₂O₃), he hanganga korundum kei roto ko ngā katote hāora me te konumohe e piri tata ana, e herea ana e ngā taunekeneke kaha ionic me te covalent. Mā tēnei hononga ka homai he kaha whatunga teitei, ka taea ai e te rauemi te ātete i te whakarerekētanga kirihou me te pakaru i raro i te ahotea o waho. Heoi anō, mā ngā rauemi mata parakore teitei me ngā tikanga sintering matatau ka whakakore i ngā hapa moroiti, ka whakarei ake i te kiato me te pakeketanga whānui.
Ko te pakeketanga teitei e tohu ana i te mahi tino pai. Nā tōna ātete kakahu tino pai ka whakamahia whānuitia i roto i ngā pūnaha whakahaere waro i roto i ngā tipu hiko wera, ngā taputapu tango puehu me te whakamahana i roto i ngā mira maitai, ngā paipa kawe konganuku i roto i te keri, ngā pūnaha huri paraoa mata me te kirīni i roto i ngā tipu sima, me ngā taputapu kawe paura i roto i te umanga matū, e pai ake ana i ngā konganuku tuku iho i roto i te roanga mahi. Hei tāpiri, he tino pai te ātete ki te waikura matū o te rauemi, e tu atu ana ki ngā waikawa kaha, ngā kawakore, me ngā whakarewa waro. I raro i ngā pāmahana teitei, ka mau tonu te uku alumina i ngā āhuatanga miihini me te matū pumau, e mahi pono ana i runga ake i te 1600°C. Hei tāpiri, ko te pakeketanga teitei ka whai wāhi ki te whakamarumaru hiko pai me te kawe wera iti, e pai ai mō ngā taputapu hiko me ngā wāhanga whakahaere wera.
Hei whakarāpopototanga,uku konumohe, me tōna pakeke Mohs o te 9, he mea nui te mahi i roto i ngā mara ahumahi me ngā hangarau. Ko tōna ātete pai ki te kakahu me te waikura, te pumau o te pāmahana teitei, me ōna āhuatanga whakamarumaru hiko e hanga ana hei rauemi nui mō te hanga matatau me ngā hangarau auaha. I te whanaketanga tonu o ngā tikanga tukatuka, e matapaetia ana ka whānui ake ngā tūmanakohanga tono o te uku alumina.
Wā tuku: Oketopa-28-2025