Amfani da α-alumina a cikin sabon abuyumburan alumina
Duk da cewa akwai nau'ikan sabbin kayan yumbu iri-iri, ana iya raba su zuwa rukuni uku gwargwadon ayyukansu da amfaninsu: yumbu mai aiki (wanda kuma aka sani da yumbu na lantarki), yumbu mai tsari (wanda kuma aka sani da yumbu na injiniya) da bioceramics. Dangane da nau'ikan kayan da aka yi amfani da su, ana iya raba su zuwa yumbu mai oxide, yumbu mai nitride, yumbu mai borode, yumbu mai carbide da yumbu mai ƙarfe. Daga cikinsu, yumbu mai alumina suna da matuƙar muhimmanci, kuma kayan da aka yi amfani da su shine foda mai α-alumina na takamaiman bayanai.
Ana amfani da α-alumina sosai wajen samar da sabbin kayan yumbu daban-daban saboda ƙarfinsa mai yawa, ƙarfinsa mai yawa, juriyar zafin jiki mai yawa, juriyar lalacewa da sauran kyawawan halaye. Ba wai kawai kayan amfanin gona ne na foda don kayan yumbu na alumina na zamani kamar su abubuwan da aka haɗa da da'ira, duwatsu masu daraja na wucin gadi, kayan aikin yankewa, ƙasusuwan wucin gadi, da sauransu ba, har ma ana iya amfani da su azaman mai ɗaukar phosphor, kayan da suka dace, kayan niƙa na musamman, da sauransu. Tare da ci gaban kimiyya da fasaha na zamani, fannin amfani da α-alumina yana faɗaɗa cikin sauri, kuma buƙatar kasuwa tana ƙaruwa, kuma damarta tana da faɗi sosai.
Amfani da α-alumina a cikin yumbu mai aiki
Yumburan aikiMuna magana ne game da tukwane masu ci gaba waɗanda ke amfani da ƙarfin lantarki, maganadisu, acoustic, optical, thermal da sauran kaddarorinsu ko tasirin haɗin gwiwa don cimma wani aiki. Suna da kaddarorin lantarki da yawa kamar su insulation, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity da superconductivity, don haka suna da ayyuka da yawa da aikace-aikace masu faɗi sosai. A halin yanzu, manyan waɗanda aka yi amfani da su a aikace a babban sikelin sune tukwane masu rufewa don abubuwan da aka haɗa da marufi, tukwane masu rufewa na mota, tukwane masu rufewa na capacitor dielectric da ake amfani da su sosai a cikin talabijin da masu rikodin bidiyo, tukwane masu amfani da yawa da tukwane masu laushi ga na'urori masu auna firikwensin daban-daban. Bugu da ƙari, ana amfani da su don bututun hasken fitilar sodium mai matsin lamba.
1. Tukwanen da ke rufewa da walƙiya
A halin yanzu, yumbu mai rufewa da walƙiya shine kawai mafi girman amfani da yumbu a cikin injuna. Saboda alumina tana da kyakkyawan rufin lantarki, ƙarfin injina mai ƙarfi, juriyar matsin lamba mai yawa da juriyar girgiza mai zafi, ana amfani da filogin walƙiya mai rufewa da alumina sosai a duniya. Bukatun α-alumina don filogin walƙiya sune ƙananan foda na sodium α-alumina, inda abun cikin sodium oxide ya kai ≤0.05% kuma matsakaicin girman barbashi shine raga 325.
2. Abubuwan da aka haɗa da da'ira da kayan marufi
Yumburan da ake amfani da su a matsayin kayan substrate da kayan marufi sun fi robobi kyau a fannoni masu zuwa: juriya mai ƙarfi ga rufi, juriya ga lalata sinadarai, babban rufewa, hana shigar da danshi, babu amsawa, kuma babu gurɓatawa ga silicon semiconductor mai tsarki. Abubuwan da α-alumina ke buƙata don abubuwan da aka haɗa da kayan marufi sune: ƙimar faɗaɗa zafi 7.0×10-6/℃, ƙarfin lantarki na zafi 20-30W/K·m (zafin jiki na ɗaki), madaidaicin dielectric 9-12 (IMHz), asarar dielectric 3~10-4 (IMHz), juriya mai girma>1012-1014Ω·cm (zafin jiki na ɗaki).
Tare da babban aiki da haɗin kai mai yawa na da'irori masu haɗawa, ana gabatar da ƙarin buƙatu masu tsauri ga substrates da kayan marufi:
Yayin da ƙarfin samar da zafi na guntu ke ƙaruwa, ana buƙatar ƙarin ƙarfin wutar lantarki.
Tare da babban saurin ɓangaren kwamfuta, ana buƙatar ƙaramin ma'aunin dielectric.
Ana buƙatar ma'aunin faɗaɗa zafi ya kasance kusa da silicon. Wannan yana sanya buƙatu mafi girma akan α-alumina, wato, yana haɓaka ta hanyar tsarki da ƙamshi mai yawa.
3. Fitilar da ke fitar da haske mai ƙarfi ta sodium mai matsin lamba
Tukwane masu kyauAn yi shi da alumina mai ƙarfi mai ƙarfi kamar yadda kayan ƙasa ke da halaye na juriya ga zafin jiki mai yawa, juriya ga tsatsa, kyakkyawan rufi, ƙarfi mai yawa, da sauransu, kuma kayan yumbu ne mai kyau. Polycrystalline mai haske wanda aka yi da alumina mai ƙarfi mai ƙarfi tare da ƙaramin adadin magnesium oxide, iridium oxide ko ƙarin iridium oxide, kuma an yi shi ta hanyar sintering na yanayi da sintering mai zafi, yana iya jure tsatsa na tururin sodium mai zafi mai yawa kuma ana iya amfani da shi azaman fitilun sodium masu fitar da haske mai ƙarfi tare da ingantaccen haske.
Amfani da α-alumina a cikin yumburan gini
A matsayin kayan aikin likitanci marasa amfani, kayan bioceramic ba su da wani illa mai guba idan aka kwatanta da kayan ƙarfe da kayan polymer, kuma suna da kyakkyawan jituwa da bio da juriya ga tsatsa tare da kyallen halitta. Mutane sun ƙara daraja su. Bincike da aikace-aikacen asibiti na kayan bioceramic sun samo asali daga maye gurbin da cikawa na ɗan gajeren lokaci zuwa dasawa na dindindin da ƙarfi, kuma daga kayan halitta marasa aiki zuwa kayan halitta masu aiki da kayan halitta da kayan haɗin gwiwa da yawa.
A cikin 'yan shekarun nan, an yi amfani da bututu mai laushiyumburan aluminaan yi amfani da su wajen yin haɗin gwiwar kwarangwal na wucin gadi, haɗin gwiwa na wucin gadi, kawunan ƙugu na wucin gadi, sauran ƙasusuwan wucin gadi, tushen haƙoran wucin gadi, sukurori masu daidaita ƙashi, da gyaran cornea saboda juriyarsu ga lalata sinadarai, juriyar lalacewa, kyakkyawan kwanciyar hankali mai zafi, da kuma halayen thermoelectric. Hanyar da ake bi wajen sarrafa girman rami yayin shirya yumburan alumina masu ramuka ita ce a haɗa ƙwayoyin alumina masu girman barbashi daban-daban, a saka kumfa a ciki, sannan a fesa ƙwayoyin. Haka kuma ana iya yin anodized na faranti na aluminum don samar da ramukan nano-scale microporous channel-type.