Intuthuko Entsha Ekukhiqizweni Kwe-High-Purity α-Al2O3: Ukuphumelela Kwesayensi Yezinto

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Ekuthuthukisweni okuphawulekayo emkhakheni wesayensi yezinto ezibonakalayo, abacwaningi benze igxathu ekukhiqizeni i-alpha-Al2O3 (alpha-alumina) ehlanzekile kakhulu, into eyaziwa ngezakhiwo zayo ezingavamile kanye nezinhlelo zokusebenza ezibanzi. Lokhu kuza ngemuva kwezimangalo zangaphambili zika-Amrute et al. embikweni wabo ka-2019, owathi azikho izindlela ezikhona ezingakhiqiza i-α-Al2O3 enobumsulwa obuphezulu kanye nezindawo ezingaphezulu ezidlula imikhawulo ethile. Okutholakele kwabo kuphakamise ukukhathazeka mayelana nokulinganiselwa kwamasu okukhiqiza amanje kanye nomthelela ezimbonini ezincike kulokhu okubalulekile.

I-Alpha-alumina iwuhlobo lwe-aluminum oxide elaziswa kakhulu ngobulukhuni bayo, ukuqina kokushisa, kanye nezakhiwo zokuvala ugesi. Isetshenziswa kabanzi ezinhlelweni ezahlukahlukene, kufaka phakathi ama-ceramics, ama-abrasives, nanjenge-substrate kumishini kagesi. Isidingo sokuhlanzeka okuphezulu kwe-α-Al2O3 besilokhu sikhula, ikakhulukazi emikhakheni yama-elekthronikhi nezitsha zobumba ezithuthukisiwe, lapho ukungcola kungathinta kakhulu ukusebenza nokuthembeka.

Umbiko ka-2019 ka-Amrute et al. yagqamisa izinselele abacwaningi nabakhiqizi ababhekana nazo ekufinyeleleni amazinga okuhlanzeka afiselekayo kanye nezici zendawo. Baqaphele ukuthi izindlela zendabuko, njengezinqubo ze-sol-gel kanye ne-hydrothermal synthesis, ngokuvamile ziholela ezintweni eziwela ngaphansi kwamazinga aphezulu adingekayo ekusetshenzisweni okuphambili. Lo mkhawulo ubeke isithiyo ekusungulweni nasekuthuthukisweni kwezimboni ezimbalwa zobuchwepheshe obuphezulu.

Nokho, intuthuko yakamuva isiqalile ukubhekana nalezi zinselele. Umzamo wokubambisana wokucwaninga ohilela ososayensi abavela ezikhungweni ezimbalwa ezihamba phambili uholele ekuthuthukisweni kwendlela yokuhlanganisa inoveli ehlanganisa amasu athuthukile ukuze kukhiqizwe i-α-Al2O3 ehlanzekile enezindawo ezithuthuke kakhulu. Le ndlela entsha isebenzisa inhlanganisela ye-microwave-assisted synthesis kanye nezinqubo zokubala ezilawulwayo, okuvumela ukulawula okungcono kwezakhiwo zezinto.

Abacwaningi babike ukuthi indlela yabo ayizange ifinyelele amazinga aphezulu okuhlanzeka kodwa futhi ibangele i-α-Al2O3 enezindawo ezingaphezulu ezidlula lezo ezibikwe ngaphambilini ezincwadini. Lokhu kuphumelela kunamandla okuvula izindlela ezintsha zokusetshenziswa kwe-α-Al2O3 ezinhlelweni ezihlukahlukene, ikakhulukazi emkhakheni wezogesi, lapho isidingo sezinto ezisebenza kahle silokhu sikhula njalo.

Ngaphezu kwezicelo zayo ku-electronics, i-high-purity α-Al2O3 nayo ibalulekile ekukhiqizeni izitsha zobumba ezithuthukisiwe, ezisetshenziswa ezimbonini ezihlukahlukene, kuhlanganise ne-aerospace, yezimoto, kanye ne-biomedical. Amandla okukhiqiza i-α-Al2O3 enezici ezithuthukisiwe ingaholela ekwakhiweni kwezinto ezintsha ezilula, eziqinile, nezimelana kakhulu nokuguga nokugqwala.

Imithelela yalolu cwaningo idlulela ngale kokukhiqizwa kwezinto ezibonakalayo kuphela. Ikhono lokudala ukuhlanzeka okuphezulu kwe-α-Al2O3 enezindawo ezingaphezulu ezithuthukisiwe nakho kungaholela ekuthuthukisweni kwe-catalysis kanye nezicelo zemvelo. Isibonelo, i-α-Al2O3 ivamise ukusetshenziswa njengokwesekwa kwe-catalyst ekuphenduleni kwamakhemikhali, futhi ukuthuthukisa izakhiwo zayo kungase kuthuthukise ukusebenza kahle nokusebenza kwezinqubo ezihlukahlukene ze-catalytic.

Ngaphezu kwalokho, indlela entsha yokuhlanganisa ingavula indlela yocwaningo olwengeziwe kwezinye izigaba ze-aluminium oxide kanye nokusebenza kwazo okungenzeka. Njengoba abacwaningi beqhubeka nokuhlola izakhiwo nokuziphatha kwalezi zinto zokwakha, kunesithakazelo esikhulayo ekusetshenzisweni kwazo ekugcineni amandla, ukulungiswa kwemvelo, ngisho nasekuthuthukisweni kwamabhethri esizukulwane esilandelayo.

Okutholwe kulolu cwaningo lwakamuva kushicilelwe kujenali yesayensi yezinto ezisetshenziswayo, lapho kuthole ukunakwa kuyo yomibili imibuthano yezemfundo neyezimboni. Ochwepheshe kulo mkhakha bancome umsebenzi njengesinyathelo esibalulekile sokunqoba ukulinganiselwa okukhonjwe ngu-Amrute et al. futhi bazwakalise ithemba ngekusasa lokukhiqizwa kwe-α-Al2O3.

Njengoba isidingo sezinto ezisebenza kahle kakhulu siqhubeka sikhula, amandla okukhiqiza i-α-Al2O3 ehlanzekile enezakhiwo ezithuthukisiwe izobaluleka. Lokhu kuphumelela akugcini nje ngokubhekana nezinselele ezigqanyiswe ocwaningweni lwangaphambilini kodwa futhi kusetha isiteji sokuthuthuka okwengeziwe kusayensi yezinto ezibonakalayo. Ukusebenzisana phakathi kwabacwaningi nababambiqhaza bemboni kuzobaluleka ekuhumusheni le miphumela ibe yizinhlelo zokusebenza ezingazuzisa imikhakha eminingi.

Sengiphetha, intuthuko yakamuva ekukhiqizweni kwe-high-purity α-Al2O3 imele ingqopha-mlando kusayensi yezinto ezibonakalayo. Ngokunqoba izinselele ezikhonjwe ezifundweni zangaphambili, abacwaningi bavule amathuba amasha okusetshenziswa kwalokhu kwaziswa okuguquguqukayo ezinhlelweni ezihlukahlukene zobuchwepheshe obuphezulu. Njengoba inkambu iqhubeka nokuvela, kuyacaca ukuthi ikusasa le-α-Al2O3 kanye nokuphuma kwayo kunesithembiso esihle sokuqamba izinto ezintsha nokuthuthukiswa kuzo zonke izimboni eziningi.