He aha ngā pereki Spinel Magnesia Alumina? He aratohu katoa mō ngā kaiwhakamahi ahumahi

I roto i ngā tukanga ahumahi pāmahana teitei pēnei i te hanga sima, te hanga maitai, me te hanga karāhe, he mea nui ngā rauemi ātete ahi mō te pumau o te mahi me te whakahaere utu.Ngā pereki spinel konupora alumina, he whiringa matua mō ngā kaiwhakamahi ahumahi o te ao, e tū motuhake ana mō te pumau o te wera, te ātete ki te waikura, me te atawhai ki te taiao.E whakamārama ana tēnei aratohu i ngā kaupapa matua o ngā pereki spinel konupora alumina mō ō hiahia ahumahi.

1. Te Whakamāramatanga o ngā Pereki Spinel Magnesia Alumina

Ko ngā pereki spinel konupūmā alumina he rauemi ātete kawakore hangai, he mea hanga tuatahi mai i te konupūmā waikura parakore teitei (MgO, 80%-92%) me te konupūmā waikura (Al₂O₃, 3%-14%). Ko ō rātou āhua tioata matua—periclase me te konupūmā-alumina spinel (MgO·Al₂O₃)—ka hanga he hanganga pumau mā te whakamahana pāmahana teitei. Hei whakakapi kore-chromium ki ngā konupūmā tuku iho, ka karohia e ngā pereki spinel konupūmā alumina ngā tukunga chromium hexavalent paitini, e tutuki katoa ana ki ngā paerewa taiao o te ao.

2. Ngā Āhuatanga Matua o ngā Pereki Spinel Magnesia Alumina

Ko ngā āhuatanga tino pai o ngā pereki spinel konupūmā alumina ko:

• ① He tino pai te pumau o te ru wera, e tu ana i ngā huringa whakamatao wai 12-20 i te 1100°C;
• ② He ātete pāmahana teitei, e whakamanamana ana ki te ira rewa 2135°C me te ātete wera i raro i te kawenga >1700°C;
• ③ He ātete kaha ki te waikura me te paru ki ngā paru kawakore, ngā hau waikawa, me ngā konganuku kawakore;
• ④ He kaha hanganga pono, me te matotoru papatipu ≥2.90 g/cm³ me te kaha kuru matao ≥45 MPa.