Fahamkeena, ceramics zirconia iyo ceramics alumina labaduba waa caddaan, halka ceramics silicon nitride ay madow yihiin.Ma aragtay alumina madow (AL2O3) dhoobada?
Ceramics-ka madow ee aluminiumka ah ayaa si weyn loogu fiirsaday sababtoo ah sifooyinkooda gaarka ah, Semiconductor isku dhafan wareegga caadiga ah waxay u baahan yihiin dareen iftiin wanaagsan, waxay yareyn kartaa saameynta xun ee iftiinka wareegyada isku dhafan.Markaa madow ayaa ugu fiican in la doorto.
Aluminium (AL2O3) badanaa waa mid aan midab lahayn ama adag oo cad, laakiin xaaladaha qaarkood waxay isu rogi kartaa madow.Tan soo socota waa habka faahfaahsan ee aluminium oxide samaynta madow: Wasakhowga dusha: Waxaa jira qaar wasakh ah oo ku yaal dusha sare ee alumina, sida maadada organic ka kooban tahay kaarboon, hydrogen, oxygen iyo walxo kale, ama wasakh ka kooban biraha kala-guurka.Wasakhyadani waxay u dhaqmi karaan sidii kiciyayaal, taasoo keenaysa in aluminiumku uu falceliyo.Dareen-celinta Oxidation-yaraynta: Heerkulka iyo jawiga qaarkood, wasakhowga dusha alumina waxay mari doonaan fal-celinta oksaydheynta-yaraynta oksijiinta.Dareen-celintani waxay keeni kartaa isbeddel ku yimaada midabka aluminiumka.Sameynta aagga dhimista: Dusha sare ee alumina, sababtoo ah jiritaanka falcelinta redox, aag dhimis ayaa la samayn doonaa.Gobolkan la dhimay wuxuu leeyahay sifooyin kiimiko oo kala duwan, oo ay ku jiraan isbeddelada stoichiometry iyo samaynta cilladaha daloosha.Sameynta xarumaha midabka: Gobolka dhimista, waxaa jira goobo ogsijiin ah oo cilladaysan oo qaadi kara elektaroonno dheeri ah.Elektaroonnadan dheeraadka ah waxay beddelaan qaab-dhismeedka band ee alumina, beddela sida ay u nuugaan oo ay u iftiimiyaan iftiinka.Tani waxay sababtaa in midabka aluminiumku isu beddelo madow.Guud ahaan, habka samaynta madow ee alumina waxay inta badan sabab u tahay falcelinta yaraynta oksaydhka ee ay bilaabeen wasakhda dusha alumina, taas oo samaysa aag la dhimay oo soo bandhigtay electrons dheeraad ah, taas oo ugu dambeyntii keenta alumina inay madow noqoto.Alumina madow waxaa loo isticmaali karaa sidii qalab loogu talagalay qalabka sida photodiodes, photoconductors, sawirqaadayaasha, iyo sawir-qaadaha.Farqiga tamarta sare iyo sifooyinka wanaagsan ee optoelectronic ayaa awood u siinaya inay door muhiim ah ka ciyaarto goobta optoelectronics.
Waqtiga boostada: Agoosto-31-2023