Adeegsiga α-alumina ee qaab cusubdhoobada alumina
In kasta oo ay jiraan noocyo badan oo agab dhoobo cusub ah, haddana waxaa loo qaybin karaa saddex qaybood iyadoo loo eegayo shaqooyinkooda iyo isticmaalkooda: dhoobada shaqaynaysa (sidoo kale loo yaqaan dhoobada elektarooniga ah), dhoobada qaab-dhismeedka (sidoo kale loo yaqaan dhoobada injineernimada) iyo bayoolajiyada. Sida laga soo xigtay qaybaha kala duwan ee alaabta ceeriin ah ee la isticmaalo, waxaa loo qaybin karaa dhoobada oksaydhka, dhoobada nitride, dhoobada borode, dhoobada carbide iyo dhoobada birta. Kuwaas waxaa ka mid ah, dhoobada alumina aad bay muhiim u yihiin, walxo cayriin ahna waa budada α-alumina oo leh qeexitaanno kala duwan.
α-alumina si weyn ayaa loogu isticmaalaa soo saarista agabyo kala duwan oo dhoobo cusub ah sababtoo ah xooggeeda sare, adkaanteeda sare, iska caabbinta heerkulka sare, iska caabbinta xirashada iyo sifooyin kale oo aad u fiican. Ma aha oo kaliya walxo cayriin ah oo loogu talagalay dhoobada alumina ee horumarsan sida substrate-ka wareegga isku dhafan, dhagaxyada macmalka ah, qalabka jarista, lafaha macmalka ah, iwm., laakiin sidoo kale waxaa loo isticmaali karaa sida side fosfoor, agabyada caabbinta sare, agabyada shiididda gaarka ah, iwm. Iyadoo la horumarinayo sayniska iyo tignoolajiyada casriga ah, goobta codsiga ee α-alumina si degdeg ah ayay u sii ballaaranaysaa, baahida suuquna sidoo kale way sii kordheysaa, rajadeeduna aad bay u ballaaran tahay.
Adeegsiga α-alumina ee dhoobada shaqaynaysa
Dhoobada shaqeynayaTixraaca dhoobada horumarsan ee adeegsada sifooyinkooda korontada, birlabta, acoustic-ga, indhaha, kulaylka iyo kuwa kale ama saameyntooda isku-xidhka si loo gaaro shaqo gaar ah. Waxay leeyihiin sifooyin koronto oo badan sida dahaarka, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity iyo superconductivity, sidaa darteed waxay leeyihiin shaqooyin badan iyo codsiyo aad u ballaaran. Waqtigan xaadirka ah, kuwa ugu muhiimsan ee loo isticmaalay si wax ku ool ah waa dhoobada dahaarka leh ee loogu talagalay substrate-ka wareegga isku dhafan iyo baakadaha, dhoobada dahaarka baabuurta ee dahaarka leh, dhoobada dielectric ee capacitor-ka si weyn loogu isticmaalo telefishinnada iyo duubayaasha fiidiyowga, dhoobada piezoelectric oo leh isticmaal badan iyo dhoobada xasaasiga ah ee dareemayaasha kala duwan. Intaa waxaa dheer, waxaa sidoo kale loo isticmaalaa tuubooyinka iftiinka soo saara nalalka sodium-ka ee cadaadiska sare leh.
1. Dhoobada dahaarka leh ee lagu xidho biraha
Dhoobada dahaarka leh ee lagu xidho biraha ayaa hadda ah codsiga kaliya ee ugu weyn ee dhoobada lagu sameeyo matoorada. Maadaama alumina ay leedahay dahaar koronto oo aad u fiican, xoog farsamo oo sare, iska caabin cadaadis sare iyo iska caabin shoogga kulaylka, fiilooyinka dahaarka leh ee alumina ayaa si weyn looga isticmaalaa adduunka. Shuruudaha loogu talagalay fiilooyinka dahaarka leh ee α-alumina waa budo yaryar oo sodium α-alumina ah oo caadi ah, kaas oo ka kooban sodium oxide uu yahay ≤0.05% celceliska cabbirka walxahana uu yahay 325 mesh.
2. Substrate-yada isku dhafan iyo agabka baakadaha
Dhoobada loo isticmaalo walxaha substrate-ka iyo agabka baakadaha ayaa ka sarreeya balaastikada dhinacyada soo socda: iska caabinta dahaarka sare, iska caabinta daxalka kiimikada sare, shaabad sare, ka hortagga gelinta qoyaanka, falcelin la'aan, iyo wasakhowga silicon semiconductor-ka aadka u saafiga ah. Sifooyinka α-alumina ee looga baahan yahay substrate-ka wareegyada isku dhafan iyo agabka baakadaha waa: isku-darka ballaarinta kulaylka 7.0×10-6/℃, conductivity kulaylka 20-30W/K·m (heerkulka qolka), joogto dielectric 9-12 (IMHz), luminta dielectric 3~10-4 (IMHz), iska caabinta mugga>1012-1014Ω·cm (heerkulka qolka).
Iyada oo la adeegsanayo waxqabadka sare iyo isku-darka sare ee wareegyada isku dhafan, shuruudo adag ayaa la soo bandhigayaa marka la eego walxaha iyo walxaha baakadaha:
Marka kulaylka jajabku kordho, waxaa loo baahan yahay koronto-qaadis heer sare ah.
Xawaaraha sare ee curiyaha kombiyuutarka, waxaa loo baahan yahay joogto dielectric hooseeya.
Isugeynta ballaarinta kulaylka ayaa looga baahan yahay inay u dhowdahay silicon. Tani waxay dhigaysaa shuruudo sare oo ku saabsan α-alumina, taas oo ah, waxay ku kortaa jihada daahirnimada sare iyo jilicsanaanta.
3. Nalalka iftiinka soo saara ee sodium-ka cadaadiska sare leh
Dhoobada fiicanlaga sameeyay alumina ultrafine saafi ah oo heer sare ah oo ah walxo ceeriin ah waxay leeyihiin astaamo u adkeysiga heerkulka sare, iska caabbinta daxalka, dahaarka wanaagsan, xoog sare, iwm., waana walxo dhoobo ah oo aad u fiican. Polycrystalline hufan oo laga sameeyay alumina saafi ah oo heer sare ah oo leh xaddi yar oo magnesium oxide ah, iridium oxide ama iridium oxide lagu daray, oo laga sameeyay sintering jawi iyo sintering kulul, waxay u adkeysan kartaa daxalka uumiga sodium heerkulka sare leh waxaana loo isticmaali karaa sidii laambado sodium ah oo iftiin soo saaraya oo cadaadis sare leh oo leh hufnaan iftiin sare leh.
Adeegsiga α-alumina ee dhoobada qaab-dhismeedka
Maadaama ay yihiin walxo aan dabiici ahayn oo bayooloji ah, walxaha bayoseramiga ah ma laha waxyeellooyin sun ah marka la barbar dhigo walxaha birta iyo walxaha polymer-ka, waxayna leeyihiin iswaafajin bayooloji oo wanaagsan iyo iska caabin daxaleed oo ay la leeyihiin unugyada bayoolojiga. Dadku si isa soo taraysa ayay u qiimeeyaan. Cilmi-baarista iyo adeegsiga kiliinikada ee walxaha bayoseramiga ah ayaa ka soo ifbaxay beddelka iyo buuxinta muddada gaaban ilaa beerista joogtada ah iyo mid adag, iyo laga bilaabo walxaha bayoolojiga ah ee aan firfircoonayn ilaa walxaha bayoolojiga ah ee firfircoon iyo walxaha isku dhafan ee wejiyada badan leh.
Sannadihii ugu dambeeyay, daloolo badandhoobada aluminawaxaa loo isticmaalay in lagu sameeyo kala-goysyada lafaha ee macmalka ah, kala-goysyada jilibka ee macmalka ah, madaxyada bawdada ee macmalka ah, lafaha kale ee macmalka ah, xididdada ilkaha ee macmalka ah, boolalada hagaajinta lafaha, iyo dayactirka corneal-ka sababtoo ah iska caabbinta daxalka kiimikada, iska caabbinta xirashada, xasilloonida heerkulka sare ee wanaagsan, iyo sifooyinka kuleylka. Habka loo xakameeyo cabbirka daloolka inta lagu jiro diyaarinta dhoobada alumina ee daloolada leh waa in la isku daro walxaha alumina ee cabbirro kala duwan leh, lagu shubo xumbo, oo lagu buufiyo walxaha. Taarikada aluminiumka ayaa sidoo kale lagu samayn karaa anodized si loo soo saaro daloolada nooca kanaalka microporous ee nano-scale ee jihada.