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Kuphuhliso olubalulekileyo kwinkalo yenzululwazi yezinto eziphathekayo, abaphandi baye benza inkqubela ekuveliseni i-high-purity α-Al2O3 (alpha-alumina), into eyaziwayo ngeempawu zayo ezikhethekileyo kunye nezicelo ezibanzi. Oku kuza emva kwamabango angaphambili ka-Amrute et al. kwingxelo yabo ye-2019, echaza ukuba akukho ndlela zikhoyo zinokuvelisa i-α-Al2O3 kunye nokucoceka okuphezulu kunye neendawo eziphezulu ezidlula imida ethile. Iziphumo zabo zaphakamisa inkxalabo malunga nokunciphisa iindlela zobuchule bemveliso yangoku kunye nefuthe kumashishini axhomekeke kwesi sixhobo sibalulekileyo.
I-Alpha-alumina luhlobo lwe-aluminiyam oxide exabiseke kakhulu ngenxa yokuqina kwayo, ukuzinza kwe-thermal, kunye neempawu zokugquma umbane. Isetyenziswa ngokubanzi kwizicelo ezahlukeneyo, kubandakanya iiseramics, iibrasives, kunye ne-substrate kwizixhobo zombane. Imfuno ye-high-purity α-Al2O3 iye yanyuka, ngokukodwa kwimimandla ye-electronics kunye neekeramics eziphambili, apho ukungcola kunokuchaphazela kakhulu ukusebenza kunye nokuthembeka.
Ingxelo ka-2019 ngu-Amrute et al. iqaqambise imingeni abajongene nayo abaphandi kunye nabavelisi ekuphumezeni amanqanaba anqwenelekayo okucoceka kunye neempawu zommandla womphezulu. Baye baqaphela ukuba iindlela zendabuko, ezifana neenkqubo ze-sol-gel kunye ne-hydrothermal synthesis, zihlala zikhokelela kwizinto eziwela phantsi kwemigangatho ephezulu efunekayo kwizicelo ezinqamlekileyo. Lo mda ubangele umqobo ekuqaliseni izinto ezintsha kunye nophuhliso kumashishini amaninzi akumgangatho ophezulu.
Nangona kunjalo, inkqubela phambili yamva nje iqalile ukulungisa le mingeni. Umzamo wophando ohlangeneyo obandakanya izazinzulu ezivela kumaziko amaninzi akhokelayo uye wakhokelela ekuphuhlisweni kwendlela yokudibanisa inoveli edibanisa ubuchule obuphezulu ukuvelisa i-alpha-Al2O3 ephezulu kunye neendawo eziphuculwe kakhulu. Le ndlela intsha isebenzisa indibaniselwano ye-microwave-assisted synthesis kunye neenkqubo zokubala ezilawulwayo, ivumela ulawulo olungcono kwiipropati zemathiriyeli.
Abaphandi baxela ukuba indlela yabo ayiphumelelanga kuphela kumanqanaba aphezulu okucoceka kodwa ibangele i-α-Al2O3 eneendawo eziphezulu ezidlula ezo zichazwe ngaphambili kwiincwadi. Le mpumelelo inamandla okuvula iindlela ezintsha zokusetyenziswa kwe-α-Al2O3 kwizicelo ezahlukeneyo, ngokukodwa kwicandelo le-electronics, apho imfuno yezinto eziphezulu zokusebenza ihlala isanda.
Ukongeza kwizicelo zayo kwi-electronics, i-high-purity α-Al2O3 nayo ibaluleke kakhulu kwimveliso yeekeramics eziphambili, ezisetyenziswa kumashishini ahlukeneyo, kuquka i-aerospace, i-automotive, kunye ne-biomedical. Ukukwazi ukuvelisa i-α-Al2O3 eneempawu eziphuculweyo kunokukhokelela kuphuhliso lwezixhobo ezitsha ezikhaphukhaphu, zomelele, kwaye zikwazi ukumelana nokunxiba kunye nokudleka.
Iimpembelelo zolu phando zidlulela ngaphaya kwemveliso yezinto eziphathekayo. Ukukwazi ukudala ukucoceka okuphezulu kwe-α-Al2O3 kunye neendawo eziphuculweyo zomgangatho kunokukhokelela ekuqhubeleni phambili kwi-catalysis kunye nezicelo zokusingqongileyo. Umzekelo, i-α-Al2O3 ihlala isetyenziswa njengenkxaso ye-catalyst kwi-chemical reaction, kwaye ukomeleza iipropathi zayo kunokuphucula ukusebenza kakuhle kunye nokusebenza kweenkqubo ezahlukeneyo ze-catalytic.
Ngaphezu koko, indlela entsha yokudibanisa inokuvula indlela yophando olongezelelweyo kwezinye izigaba ze-aluminium oxide kunye nokusetyenziswa kwazo okunokwenzeka. Njengoko abaphandi baqhubeka nokuphonononga iimpawu kunye nokuziphatha kwezi zinto, kukho umdla okhulayo ekusebenziseni kwabo ukugcinwa kwamandla, ukulungiswa kokusingqongileyo, kunye nokuphuhliswa kweebhetri zesizukulwana esilandelayo.
Iziphumo zolu phando lwakutsha nje zipapashwe kwijenali yezesayensi yezinto ezikhokelayo, apho ziye zafumana ingqwalasela kuzo zombini izifundo kunye nezamashishini. Iingcali kwintsimi ziye zancoma umsebenzi njengenyathelo elibalulekileyo ekunqobeni imida echongiweyo ngu-Amrute et al. kwaye babonise ithemba malunga nekamva lemveliso ye-α-Al2O3.
Njengoko imfuno yezinto eziphezulu zokusebenza iqhubeka nokukhula, ukukwazi ukuvelisa i-alpha-Al2O3 ecocekileyo kunye neempawu eziphuculweyo kuya kubaluleka. Le mpumelelo ayijonganga kuphela imingeni ekhankanyiweyo kuphando oludlulileyo kodwa ikwamisela inqanaba lokutsha okuthe kratya kwisayensi yezinto. Intsebenziswano phakathi kwabaphandi kunye nabachaphazelekayo kushishino iya kuba yimfuneko ekuguquleleni ezi ziphumo zibe yimisebenzi ebonakalayo enokuthi ixhamle uluhlu olubanzi lwamacandelo.
Ukuqukumbela, inkqubela phambili yamva nje ekuvelisweni kwe-alpha-Al2O3 ephezulu yococeko imele isiganeko esibalulekileyo kwisayensi yezinto. Ngokoyisa imingeni echongiweyo kwizifundo zangaphambili, abaphandi baye bavula amathuba amatsha okusetyenziswa kwesi sixhobo sisebenza ngeendlela ezahlukeneyo kwizicelo ezahlukeneyo zobuchwepheshe obuphezulu. Njengoko intsimi iqhubeka nokuguquka, kuyacaca ukuba ikusasa le-α-Al2O3 kunye ne-derivatives yayo ibambe isithembiso esikhulu sokwenza izinto ezintsha kunye nophuhliso kuwo wonke amashishini amaninzi.
Ixesha lokuposa: Dec-26-2024
