Ngokuqonda kwethu, i-zirconia ceramics kanye ne-alumina ceramics kokubili kumhlophe, kuyilapho i-silicon nitride ceramics imnyama.Uke wazibona izitsha zobumba ezimnyama ze-alumina (AL2O3)?
I-alumina ceramics emnyama inakwa kabanzi ngenxa yezakhiwo zayo eziyingqayizivele, isekethe ehlanganisiwe ye-Semiconductor evamile idinga ukuzwela okuhle kokukhanya, inganciphisa imiphumela emibi yokukhanya kumasekethe ahlanganisiwe.Ngakho-ke umnyama ungcono kakhulu ukukhetha.
I-Aluminium(AL2O3) ivamise ukuqinile okungenambala noma okumhlophe, kodwa ngaphansi kwezimo ezithile ingaba mnyama.Okulandelayo inqubo enemininingwane ye-aluminum oxide yakhe emnyama: Ukungcoliswa komhlaba: Kukhona ukungcola okuthile endaweni ye-alumina, njengezinto eziphilayo eziqukethe ikhabhoni, i-hydrogen, umoya-mpilo nezinye izakhi, noma ukungcola okuqukethe izinsimbi eziguqukayo.Lokhu kungcola kungasebenza njengama-catalyst, okwenza i-alumina isabele.Ukusabela kokunciphisa i-oxidation: Ngaphansi kwezinga lokushisa elithile kanye nomkhathi, ukungcola okungaphezulu kwe-alumina kuzobhekana nokusabela kokunciphisa i-oxidation nge-oxygen.Lokhu kusabela kungabangela izinguquko embala we-alumina.Ukwakhiwa kwendawo yokunciphisa: Ebusweni be-alumina, ngenxa yokuba khona kokusabela kwe-redox, indawo yokunciphisa izokwakhiwa.Lesi sifunda esincishisiwe sinezindawo zamakhemikhali ezihlukene, okuhlanganisa izinguquko ku-stoichiometry kanye nokwakhiwa kwamaphutha e-lattice.Ukwakhiwa kwezikhungo ezinemibala: Esifundeni esinciphisayo, kunezindawo ezithile zele-oksijini ezinesici ezingamukela ama-electron engeziwe.Lawa ma-electron engeziwe ashintsha ukwakheka kwebhendi ye-alumina, eshintsha indlela emunca ngayo futhi ibonise ukukhanya.Lokhu kubangela ukuthi umbala we-alumina ushintshe ube mnyama.Ngokuvamile, inqubo yokwakheka kwe-alumina emnyama ibangelwa ikakhulukazi ukusabela kokunciphisa i-oxidation okuqalwa ukungcola okungaphezulu kwe-alumina, okwenza indawo encishisiwe futhi yethule ama-electron engeziwe, okubangela ukuthi i-alumina ibe mnyama.I-alumina emnyama ingasetshenziswa njengempahla yamadivayisi afana nama-photodiode, ama-photoconductors, ama-photodetectors, nama-phototransistors.Igebe layo eliphezulu lamandla kanye nezakhiwo ezinhle ze-optoelectronic ziyenza ikwazi ukudlala indima ebalulekile emkhakheni we-optoelectronics.
Isikhathi sokuthumela: Aug-31-2023