Kupu Whakataki
I roto i ngā ahumahi pāmahana teitei—mai i te hanga maitai ki te hanga karāhe—ko ngā rauemi ātete wera te poutokomanawa o ngā mahi haumaru me te whai hua. I roto i ēnei,pereki mullitee tū motuhake ana mō tō rātou pumau wera, te ātete ki te waikura, me te kaha miihini. He mea nui te mārama ki tō rātou whakarōpūtanga me ngā tono mō ngā pakihi e rapu ana ki te whakapai ake i te roa o te ora o ngā taputapu me te whakaiti i ngā utu whakahaere. Ka whakamāramahia e tēnei tuhinga ngā momo matua o ngā pereki mullite me ō rātou whakamahinga o te ao tūturu, hei āwhina i a koe ki te whakatau whai whakaaro mō ō hiahia ahumahi.
Te Whakarōpūtanga o ngā Pereki Mullite
Ka whakarōpūtia ngā pereki mullite i runga i ngā tukanga hanga me ngā wāhanga kua tāpirihia, ia mea i whakaritea kia rite ki ngā hiahia ahumahi motuhake.
1. Pereki Mullite i Whakatōngia
Mā te whakaranu i te alumina me te silica tino parakore, te hanga i te ranunga, me te whakahinuhinu i ngā pāmahana neke atu i te 1600°C, he hanganga matotoru, he iti hoki te porosity o ngā pereki mullite kua whakahinuhinuhia (i raro iho i te 15%). Mā ēnei āhuatanga ka tino ātete ki te kakahu me te ru wera—he pai mō ngā taiao e piki haere ana te pāmahana. Ko ngā whakamahinga noa ko ngā whakapuru mō ngā oumu uku, ngā oumu wera oumu pupuhi, me ngā rūma tahunga pūwero.
2. Pereki Mullite kua whakarewahia
I hangaia mā te whakarewa i ngā rauemi mata (alumina, silica) i roto i te oumu hiko (neke atu i te 2000°C) me te maka i te ranunga rewa ki roto i ngā pokepoke, he tino iti te taumata poke o ngā pereki mullite whakarewa-whakarewa, ā, he tino parakore hoki. Nā tō rātou ātete pai ki te horo matū (hei tauira, mai i te karāhe rewa, i ngā para rānei) ka waiho hei whiringa pai mō ngā kaiwhakahou oumu karāhe, ngā kaukau tine karāhe pōrewa, me ētahi atu taputapu kua pāngia e te pāpāho rewa kaha.
3. Pereki Mullite Māmā
I hangaia mā te tāpiri i ngā mea hanga-pūwero (hei tauira, te puehu rakau, te karāpeti) i te wā e hangaia ana, he 40–60% te pūwero o ngā pereki mullite māmā, ā, he iti ake te mātotoru i ngā momo pereki kua whakatōkia, kua whakarewahia rānei. Ko tō rātou painga matua ko te iti o te kawe wera (0.4–1.2 W/(m·K)), e whakaiti ana i te ngaronga wera. He whānuitia te whakamahinga hei paparanga whakamahana i roto i ngā oumu, ngā oumu, me ngā taputapu maimoatanga wera, ko te taumaha me te whai huatanga o te pūngao te mea nui.
4. Pereki Zircon Mullite
Mā te whakauru i te zircon (ZrSiO₄) ki roto i te ranunga rauemi mata, ka nui ake te mahi a ngā pereki zircon mullite i te pāmahana teitei—ka taea e rātou te tu atu ki ngā pāmahana tae atu ki te 1750°C me te ātete ki te horo o ngā para waikawa. Nā tēnei ka pai ai mō ngā taiao uaua pērā i ngā oumu whakarewa konganuku kore-ferrous (hei tauira, ngā pūtau whakaiti konumohe) me ngā rohe tahu oumu hurihuri sima.
Ngā tono o ngā pereki Mullite
Nā te maha o ngā whakamahinga o ngā pereki Mullite, he mea nui ēnei mō ngā ahumahi pāmahana teitei.
1. Ahumahi Rino
Ko te hanga maitai he pāmahana tino wera (tae atu ki te 1800°C) me ngā para waikura. Ko ngā pereki mullite kua whakakīia ki te whakakī i ngā oumu wera, ā, ko te ātete ki te werawera ka ārai i te pakaru mai i te tere o te whakamahana/whakamatao. Ko ngā momo whakarewa-whakakotahi ka tiaki i ngā koko me ngā tundish, ka whakaiti i te horo o te para me te whakaroa i te ora o ngā taputapu mā te 20–30% ki te whakataurite ki ngā oumu wera tuku iho.
2. Ahumahi Sima
Ka mahi ngā oumu hurihuri sima i te 1450–1600°C, ā, he nui te mōrearea o te horo o ngā para kawakore. Ka whakarārangihia te rohe tahunga o te oumu e ngā pereki mullite zircon, hei ātete i ngā whakaeke kawakore, hei pupuri hoki i te hanganga pai. Ka mahi anō hoki ngā pereki mullite māmā hei paparanga whakamarumaru, ka whakaiti i te whakapaunga pūngao mā te 10–15%.
3. Ahumahi Karāhe
He tino waikura te karāhe rewa (1500–1600°C), ā, he mea nui ngā pereki mullite whakarewa-whakarewa mō ngā whakahou oumu karāhe me ngā whakapuru tāke. Ka ārai i te poke o te karāhe, ā, ka roa ake te wā e mahi ana te oumu ki te 5–8 tau, mai i te 3–5 tau me ētahi atu rauemi.
4. Ētahi atu Ahumahi
I roto i te whakarewa konganuku kore-ferrous (konumohe, parahi), ka ātete ngā pereki zircon mullite ki te konganuku rewa me te pirau para. I roto i ngā matū hinu, ka whakakīia ngā oumu pakaru e ngā pereki mullite kua whakakīia nā te mea he pumau te pāmahana. I roto i ngā uku, ka āraihia ngā oumu e ngā pereki mullite māmā, ka whakaitihia te whakamahinga pūngao.
Whakamutunga
Ka tutuki i ngā momo pereki mullite ngā hiahia motuhake o ngā ahumahi pāmahana teitei - te pereki whakarewa-whakakotahi, te pereki māmā, me te pereki zircon. Mai i te whakanui ake i te pai o te oumu maitai ki te whakaroa i te roa o te oumu karāhe, ka puta he painga kitea: he roa ake te roa o te ora o ngā taputapu, he iti ake ngā utu pūngao, me te whakaiti i te wā kore mahi. I a ngā ahumahi e whai ana i te hua me te pumau ake, ka noho tonu ngā pereki mullite hei otinga matua. Kōwhiria te momo tika mō tō tono, ka wetekina ō rātou pūmanawa katoa.
Wā tuku: Oketopa-31-2025
