Tšebeliso ea α-alumina e nchali-ceramics tsa alumina
Leha ho na le mefuta e mengata ea lisebelisoa tse ncha tsa letsopa, li ka aroloa ka mekhahlelo e meraro ho latela mesebetsi le ts'ebeliso ea tsona: lirafshoa tse sebetsang (tse tsejoang hape e le lirafshoa tsa elektroniki), lirafshoa tsa sebopeho (tse tsejoang hape e le lirafshoa tsa boenjiniere) le bioceramics. Ho ea ka likarolo tse fapaneng tsa lisebelisoa tse tala tse sebelisitsoeng, li ka aroloa ka lirafshoa tsa oxide, lirafshoa tsa nitride, lirafshoa tsa boride, lirafshoa tsa carbide le lirafshoa tsa tšepe. Har'a tsona, li-ceramics tsa alumina li bohlokoa haholo, 'me thepa ea eona e tala ke α-alumina phofo ea litlhaloso tse sa tšoaneng.
α-alumina e sebelisoa haholo ha ho etsoa lisebelisoa tse ncha tse ncha tsa ceramic ka lebaka la matla a eona a phahameng, boima bo phahameng, ho hanyetsa mocheso o phahameng, ho hanyetsa ho roala le lintho tse ling tse babatsehang. Ha se feela phofo e tala bakeng sa lisebelisoa tse tsoetseng pele tsa alumina ceramics tse kang substrates tsa potoloho tse kopantsoeng, mahakoe a maiketsetso, lisebelisoa tsa ho itšeha, masapo a maiketsetso, joalo-joalo, empa hape e ka sebelisoa e le mochine oa phosphor, lisebelisoa tse tsoetseng pele tsa refractory, lisebelisoa tse khethehileng tsa ho sila, joalo-joalo.
Tšebeliso ea α-alumina ka lirafshoa tse sebetsang
Li-ceramics tse sebetsangbua ka lirafshoa tse tsoetseng pele tse sebelisang lisebelisoa tsa tsona tsa motlakase, makenete, acoustic, optical, thermal le tse ling kapa litlamorao tsa tsona tsa ho kopanya ho fihlela mosebetsi o itseng. Li na le lisebelisoa tse ngata tsa motlakase tse kang ho kenya letsoho, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity le superconductivity, kahoo li na le mesebetsi e mengata le lits'ebetso tse pharaletseng haholo. Hajoale, tse ka sehloohong tse sebelisitsoeng ts'ebelisong e kholo ke li-ceramics tsa insulate bakeng sa li-substrates tsa potoloho tse kopaneng le liphutheloana, li-ceramics tsa likoloi tsa spark plug, li-ceramics tsa capacitor dielectric tse sebelisoang haholo lithelevisheneng le lirekotong tsa video, li-ceramics tsa piezoelectric tse nang le ts'ebeliso e mengata le li-ceramic tse nang le kutloelo-bohloko bakeng sa li-sensor tse fapaneng. Ho feta moo, li boetse li sebelisoa bakeng sa li-tubes tse nang le khatello e phahameng ea lebone la sodium.
1. Spark plug insulating ceramics
Spark plug insulating ceramics hajoale ke eona feela ts'ebeliso e kholo ka ho fetisisa ea li-ceramics lienjineng. Hobane alumina e na le ts'ebetso e ntle ea motlakase, matla a phahameng a mochini, ho hanyetsa khatello e phahameng le ho hanyetsa mocheso oa mocheso, li-alumina insulating spark plugs li sebelisoa haholo lefatšeng. Litlhoko tsa α-alumina bakeng sa li-spark plugs ke li-micropowder tse tloaelehileng tse tlaase-sodium α-aluminium, tseo ho tsona sodium oxide content e leng ≤0.05% le boholo ba karoloana ea 325 mesh.
2. Li-substrates tsa potoloho tse kopantsoeng le lisebelisoa tsa ho paka
Li-ceramics tse sebelisoang e le lisebelisoa tsa substrate le lisebelisoa tsa ho paka li phahametse lipolasetiki ka lintlha tse latelang: khanyetso e phahameng ea ho kenya letsoho, khanyetso e phahameng ea lik'hemik'hale, ho tiisa ho hoholo, ho thibela ho kenella ha mongobo, ho se sebetse hape, 'me ha ho na tšilafalo ea silicon ea ultra-pure semiconductor. Thepa ea α-alumina e hlokahalang bakeng sa likaroloana tsa potoloho tse kopantsoeng le lisebelisoa tsa ho paka ke: coefficient ea ho atolosa mocheso 7.0 × 10-6 / ℃, conductivity ea mocheso 20-30W / K · m (mocheso oa kamore), dielectric kamehla 9-12 (IMHz), tahlehelo ea dielectric 3 ~ 10-4 (I10-4 MHz), molumo oa mocheso oa ho hanyetsa 10cm · 10cm.
Ka ts'ebetso e phahameng le kopanyo e phahameng ea lipotoloho tse kopaneng, litlhoko tse thata li behiloe pele bakeng sa li-substrates le lisebelisoa tsa ho paka:
Ha tlhahiso ea mocheso ea chip e ntse e eketseha, ho hlokahala hore ho be le conductivity e phahameng ea mocheso.
Ka lebelo le phahameng la karolo ea komporo, ho hlokahala hore ho be le dielectric tse tlase.
Coefficient ea ho atolosa mocheso e hlokahalang ho ba haufi le silicon. Sena se beha litlhoko tse phahameng ho α-alumina, ke hore, e tsoela pele ka tsela ea bohloeki bo phahameng le botle.
3. Lebone le khanyang la sodium le nang le khatello e phahameng
Li-ceramics tse ntlee entsoe ka alumina ea ultrafine e phahameng haholo e le lisebelisoa tse tala li na le litšobotsi tsa ho hanyetsa mocheso o phahameng, ho hanyetsa kutu, ho kenya letsoho hantle, matla a phahameng, joalo-joalo, 'me ke lisebelisoa tse ntle tsa optical ceramic. Transparent polycrystalline e entsoeng ka alumina e hloekileng e nang le magnesium oxide e nyane, iridium oxide kapa iridium oxide additives, 'me e entsoe ka sepakapaka se sintering le sintering e chesang, e khona ho mamella ho bola ha mouoane oa sodium e phahameng ea mocheso' me e ka sebelisoa e le mabone a phahameng a khatello ea sodium a nang le khanya e phahameng.
Tšebeliso ea α-alumina ka lirafshoa tsa meralo
Joalo ka lisebelisoa tsa inorganic biomedical, lisebelisoa tsa bioceramic ha li na litlamorao tse chefo ha li bapisoa le lisebelisoa tsa tšepe le lisebelisoa tsa polymer, 'me li na le biocompatibility e ntle le ho hanyetsa kutu le lisele tsa tlhaho. Li ’nile tsa nkoa e le tsa bohlokoa le ho feta ke batho. Patlisiso le ts'ebeliso ea bongaka ea lisebelisoa tsa bioceramic li tsoetse pele ho tloha ho nkela sebaka se khuts'oane le ho tlatsoa ho ea ho ho kengoa ka ho sa feleng le ho tiileng, le ho tloha ho lisebelisoa tse sa sebetseng tsa bioloji ho isa ho lisebelisoa tse sebetsang ka bioloji le lisebelisoa tse kopaneng tsa multiphase.
Lilemong tsa morao tjena, porousli-ceramics tsa aluminali 'nile tsa sebelisoa ho etsa manonyeletso a maiketsetso a skeletal, manonyeletso a maiketsetso a mangole, lihlooho tsa maiketsetso tsa basali, masapo a mang a maiketsetso, metso ea maiketsetso ea meno, li-screws tsa ho lokisa lesapo le litokiso tsa cornea ka lebaka la lik'hemik'hale tsa tsona tse hanyetsanang le ho bola, ho se sebetse hantle, botsitso bo botle ba mocheso o phahameng le thepa ea thermoelectric. Mokhoa oa ho laola boholo ba pore nakong ea ho lokisoa ha li-ceramics tsa porous alumina ke ho kopanya likaroloana tsa alumina tsa boholo bo fapaneng, ho kenya foam, le ho fafatsa ho omisa likaroloana. Lipoleiti tsa aluminium li ka boela tsa fetoloa hore li hlahise li-pores tsa mofuta oa nano-scale microporous channel-type.