Ekuqondeni kwethu, i-zirconia ceramics kunye ne-alumina ceramics zombini zimhlophe, ngelixa i-silicon nitride ceramics imnyama.Ngaba uzibonile iiseramikhi ezimnyama ze-alumina (AL2O3)?
Iikeramics ezimnyama ze-alumina ziqwalaselwe ngokubanzi ngenxa yeempawu zazo ezikhethekileyo, iSemiconductor edibeneyo yesekethe iqhelekile idinga ubuntununtunu bokukhanya okuhle, inokunciphisa iziphumo ezibi zokukhanya kwiisekethe ezidibeneyo.Ngoko umnyama ungcono ukhethe.
I-Aluminiyam(AL2O3) idla ngokuba yinto eqinileyo engenambala okanye emhlophe, kodwa phantsi kweemeko ezithile inokujika ibemnyama.Oku kulandelayo yinkqubo eneenkcukacha ye-aluminiyam oxide eyenza umnyama: Ungcoliseko lomphezulu: Kukho ezinye izinto ezingcolisa umphezulu we-alumina, njengezinto eziphilayo ezinekhabhoni, i-hydrogen, ioksijini nezinye izinto, okanye ubumdaka obuqulathe iintsimbi eziguqukayo.Oku kungcola kunokusebenza njenge-catalysts, kubangela ukuba i-alumina iphendule.Ukusabela kokunciphisa i-oxidation: Phantsi kobushushu obuthile kunye ne-atmosfera, ungcoliseko olukumphezulu we-alumina luya kusabela ekunciphiseni i-oxidation nge-oxygen.Ezi mpendulo zinokubangela utshintsho kumbala we-alumina.Ukuqulunqwa kwendawo yokunciphisa: Kwi-surface ye-alumina, ngenxa yobukho be-redox reaction, indawo yokunciphisa iya kwenziwa.Lo mmandla oncitshisiweyo uneempawu ezahlukeneyo zeekhemikhali, kubandakanywa utshintsho kwi-stoichiometry kunye nokwakhiwa kweziphene ze-lattice.Ukuqulunqwa kwamaziko ombala: Kwingingqi yokunciphisa, kukho iindawo ezithile zeoksijini ezineziphene ezinokuthatha ii-electron ezongezelelweyo.Ezi electron zongezelelweyo zitshintsha isakhiwo sebhendi ye-alumina, itshintsha indlela efunxa ngayo kwaye ibonise ukukhanya.Oku kubangela ukuba umbala we-alumina utshintshe ube mnyama.Ngokubanzi, inkqubo yokwakhiwa kwe-alumina emnyama ibangelwa ikakhulu ngenxa ye-oxidation-reduction reaction eqaliswe yizinto ezingcolisayo kumphezulu we-alumina, eyenza indawo encitshisiweyo kwaye ingenise ii-electron ezongezelelweyo, ekugqibeleni ibangela ukuba i-alumina ibe mnyama.I-alumina emnyama ingasetyenziswa njengesixhobo sezixhobo ezinje ngeefotodiode, iifotoconductors, ii-photodetectors, kunye neefototransistors.I-gap yayo yamandla aphezulu kunye neempawu ezintle ze-optoelectronic zivumela ukuba zidlale indima ebalulekileyo kwintsimi ye-optoelectronics.
Ixesha lokuposa: Aug-31-2023