Fa'aaogāina ole α-alumina ile foualumina keramika
E ui lava e tele ituaiga o mea sima fou, e mafai ona vaevaeina i ni vaega se tolu e tusa ai ma a latou galuega ma faʻaoga: mea faʻaogaina (faʻapitoa foi o mea faʻaeletoroni), mea faʻapipiʻi (faʻapitoa foʻi o mea faʻainisinia) ma bioceramics. E tusa ai ma vaega eseese o meafaitino faʻaaogaina, e mafai ona vaevaeina i le oxide ceramics, nitride ceramics, boride ceramics, carbide ceramics ma metal ceramics. Faatasi ai ma i latou, alumina ceramics e taua tele, ma o ana mea mata o le α-alumina paʻu o faʻamatalaga eseese.
α-alumina o loʻo faʻaaogaina lautele i le gaosiga o mea fou sima fou ona o lona malosi maualuga, maualuga maualuga, maualuga le vevela, faʻaofuofu teteʻe ma isi mea sili ona lelei. E le gata o se paʻu mea mata mo alumina sili keramika e pei o substrates matagaluega tuufaatasia, maa taua, tipi meafaigaluega, ponaivi faafoliga, ma isi, ae e mafai foi ona faaaoga e avea o se phosphor carrier, mea refractory alualu i luma, mea olo faapitoa, ma isi. Faatasi ai ma le atinae o faasaienisi ma tekinolosi faaonaponei, o le fanua talosaga o le α-alumina ua vave ona faalauteleina, ma o le tele o manaoga maketi o loo faateleina foi.
Fa'aaogāina ole α-alumina ile sima fa'atino
Ceramic aogafa'asino i sima fa'apitoa e fa'aoga ai a latou eletise, maneta, fa'alogo, mata, vevela ma isi mea totino po'o o latou a'afiaga fa'atasi e ausia ai se galuega patino. E tele a latou mea eletise e pei o le insulation, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity ma le superconductivity, o lea e tele a latou galuega ma faʻaoga lautele. I le taimi nei, o mea autu o loʻo faʻaaogaina i luga o se fua tele o mea faʻapipiʻi faʻapipiʻi mo mea faʻapipiʻi faʻapipiʻi ma afifiina, mea faʻapipiʻi afi afi afi, capacitor dielectric ceramics faʻaaogaina lautele i televise ma puʻe vitio, piezoelectric ceramics ma le tele o faʻaoga ma maaleale ceramics mo masini eseese. E le gata i lea, o loʻo faʻaogaina foʻi mo faʻamalama faʻamalama o le sodium maualuga maualuga.
1. Omea fa'a'ese'ese fa'apalapala
O sima fa'a'ese'ese fa'aulaula e na'o le pau lea o le fa'aogaina o sima i masini. Talu ai ona o le alumina e sili ona lelei le faʻaogaina o le eletise, maualuga le malosi faʻainisinia, maualuga le mamafa o le mamafa ma le faʻalavelave faʻafuaseʻi o le vevela, o le alumina faʻapipiʻi faʻamalo e faʻaaogaina lautele i le lalolagi. O manaʻoga mo le α-alumina mo moli aloiafi o micropowders masani maualalo-sodium α-alumina, lea o loʻo i totonu o le sodium oxide e ≤0.05% ma le averesi o le lapoʻa o le 325 mesh.
2. Mea fa'apipi'i fa'atasi ma mea fa'apipi'i
Ceramic faʻaaogaina e fai ma mea e faʻaaogaina ai meaʻai ma mea faʻapipiʻi e sili atu nai lo palasitika i itu nei: maualuga le faʻafefeteina o le insulation, maualuga le faʻamaʻiina o vailaʻau, faʻamaufaʻailoga maualuga, puipuia o le susu, leai se gaioiga, ma leai se filogia i ultra-pure semiconductor silicon. O mea totino o le α-alumina e manaʻomia mo le faʻapipiʻiina o mea faʻapipiʻi ma mea faʻapipiʻi e: faʻalauteleina le vevela 7.0 × 10-6 / ℃, conductivity vevela 20-30W / K·m (vevela potu), dielectric faifai pea 9-12 (IMHz), leiloa dielectric 3 ~ 10-4 (IMHz), voluma resistivity> 1012-1014 vevela).
Faatasi ai ma le maualuga o le faʻatinoga ma le maualuga o le tuʻufaʻatasia o fesoʻotaʻiga tuʻufaʻatasia, o loʻo tuʻuina atu manaʻoga sili atu mo mea faʻapipiʻi ma mea faʻapipiʻi:
A'o fa'atuputeleina le vevela o le va'a, e mana'omia le fa'auluina o le vevela.
Faatasi ai ma le saoasaoa maualuga o le elemene komepiuta, e manaʻomia le maualalo o le dielectric faifai pea.
E mana'omia le fa'alauteleina o le vevela e latalata ile silikoni. O lenei mea e tuʻuina atu ai manaʻoga maualuga i luga o le α-alumina, o lona uiga, e atiaʻe i le itu o le mama maualuga ma le lelei.
3. Lamepa fa'amalama fa'amalama o le sodium maualuga
Omea leleifaia i le maualuga-mama ultrafine alumina e pei o mea mata o loʻo i ai uiga o le maualuga o le vevela, faʻamaʻi faʻamaʻi, faʻamaʻi lelei, malosi maualuga, ma isi mea, ma o se mea faʻapipiʻi sili ona lelei. O le polycrystalline manino e faia i le alumina maualuga-mama ma sina vaega itiiti o le magnesium oxide, iridium oxide poʻo le iridium oxide additives, ma faia e le siosiomaga sintering ma le vevela vevela sintering, e mafai ona tatalia le pala o le vevela sodium maualuga ma e mafai ona faʻaaogaina e pei o le maualuga o le mamafa o le sodium moli-emitting moli ma le maualuga o le malamalama lelei.
Fa'aaogāina ole α-alumina ile fa'amea fa'ameamea
I le avea ai ma mea fa'apitoa fa'alesoifua maloloina, o mea o le bioceramic e leai ni a'afiaga oona pe a fa'atusatusa i mea u'amea ma mea polymer, ma e lelei le biocompatibility ma le fa'a'ele'ele fa'atasi ma mea ola. Ua fa'ateleina le fa'atauaina e tagata. O su'esu'ega ma le fa'aogaina o mea fa'apitoa ole bioceramic ua fa'atupuina mai le suia ma le fa'atumu mo taimi pu'upu'u i le fa'atumauina tumau ma fa'amautu, ma mai mea fa'aola inert i mea ola fa'aola ma mea fa'apipi'i fa'atele.
I tausaga talu ai nei, porousalumina keramikaua faʻaaogaina e fai ai soʻotaga skeletal faʻapitoa, sooga tulivae faʻapitoa, ulu femoral faʻapitoa, isi ponaivi faʻapitoa, aʻa nifo faʻapitoa, faʻamau faʻamaʻi ponaivi, ma toe faʻaleleia o le corneal ona o latou faʻamaʻi faʻamaʻi, faʻaofuofu teteʻe, lelei maualuga maualuga mautu, ma meatotino thermoelectric. O le auala mo le puleaina o le pore tele i le taimi o le sauniuniga o porous alumina ceramics o le faʻafefiloi o vaega o le alumina o lapopoa eseese, foam impregnate, ma faʻamago mago vaega. E mafai foi ona anodized papatusi alumini e maua ai le itu nano-fua microporous alalaupapa-ituaiga pores.