Tšebeliso ea α-alumina ho e nchali-ceramic tsa alumina
Leha ho na le mefuta e mengata ea thepa e ncha ea letsopa, li ka aroloa ka mekhahlelo e meraro ho latela mesebetsi le ts'ebeliso ea tsona: letsopa le sebetsang (le tsejoang hape e le letsopa la elektroniki), letsopa la sebopeho (le tsejoang hape e le letsopa la boenjiniere) le bioceramics. Ho latela likarolo tse fapaneng tsa thepa e tala tse sebelisoang, li ka aroloa ka letsopa la oxide, letsopa la nitride, letsopa la boride, letsopa la carbide le letsopa la tšepe. Har'a tsona, letsopa la alumina le bohlokoa haholo, 'me thepa ea lona e tala ke phofo ea α-alumina ea litlhaloso tse fapaneng.
α-alumina e sebelisoa haholo tlhahisong ea lisebelisoa tse fapaneng tse ncha tsa letsopa ka lebaka la matla a eona a phahameng, ho ba thata haholo, ho hanyetsa mocheso o phahameng, ho hanyetsa ho tsofala le litšobotsi tse ling tse ntle. Hase feela thepa e tala ea phofo bakeng sa li-ceramic tse tsoetseng pele tsa alumina tse kang li-substrate tsa potoloho tse kopantsoeng, mahakoe a maiketsetso, lisebelisoa tsa ho seha, masapo a maiketsetso, jj., empa hape e ka sebelisoa e le sesebelisoa sa ho jara phosphor, lisebelisoa tse tsoetseng pele tsa ho hanyetsa, lisebelisoa tse khethehileng tsa ho sila, jj. Ka nts'etsopele ea mahlale le theknoloji ea sejoale-joale, tšimo ea ts'ebeliso ea α-alumina e ntse e hola ka potlako, 'me tlhoko ea' maraka le eona ea eketseha, 'me menyetla ea eona e pharaletse haholo.
Tšebeliso ea α-alumina ka har'a li-ceramic tse sebetsang
Li-ceramic tse sebetsange bua ka liseramike tse tsoetseng pele tse sebelisang thepa ea tsona ea motlakase, makenete, acoustic, optical, thermal le tse ling kapa litlamorao tsa tsona tsa ho kopanya ho fihlela mosebetsi o itseng. Li na le thepa e mengata ea motlakase joalo ka insulation, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity le superconductivity, kahoo li na le mesebetsi e mengata le lits'ebetso tse pharaletseng haholo. Hona joale, tse ka sehloohong tse sebelisitsoeng ka mokhoa o sebetsang ka tekanyo e kholo ke liseramike tse sireletsang bakeng sa li-substrate tsa potoloho tse kopaneng le liphutheloana, liseramike tse sireletsang spark plug tsa likoloi, liseramike tsa dielectric tsa capacitor tse sebelisoang haholo lithelevisheneng le lirekotong tsa video, liseramike tsa piezoelectric tse nang le ts'ebeliso e mengata le liseramike tse utloang bohloko bakeng sa li-sensor tse fapaneng. Ho feta moo, li boetse li sebelisoa bakeng sa liphaephe tse ntšang leseli la mabone a sodium a khatello e phahameng.
1. Lisebelisoa tsa letsopa tse sireletsang serame ka polaka ea tlhase
Diserame tse sireletsang polaka ya spark plug hajoale ke tsona feela tse sebediswang ka ho fetisisa tsa diserame dienjeneng. Hobane alumina e na le ho thibela motlakase ho babatsehang, matla a phahameng a mechini, kgatello e phahameng le kgatello e phahameng ya ho thothomela ha mocheso, diserame tse sireletsang spark plug tsa alumina di sebediswa haholo lefatsheng. Ditlhoko tsa α-alumina bakeng sa diserame ke diphofo tse tlwaelehileng tsa α-alumina tse nang le sodium e tlase, tseo ho tsona dikahare tsa sodium oxide e leng ≤0.05% mme boholo ba dikarolwana tse mahareng ke 325 mesh.
2. Lisebelisoa tse kopantsoeng tsa potoloho le thepa ea ho paka
Diserame tse sebediswang e le thepa ya substrate le thepa ya ho paka di phahametse dipolasetiki ka dintlha tse latelang: ho hanyetsa ho hoholo ha ho kwahela, ho hanyetsa ho hoholo ha dikhemikhale tsa ho bola, ho kwala ho hoholo, thibelo ya ho kenella ha mongobo, ho se sebetse hantle, le ho se silafatse silicon ya semiconductor e hlwekileng haholo. Dithoto tsa α-alumina tse hlokahalang bakeng sa di-substrate tsa potoloho e kopaneng le thepa ya ho paka ke: coefficient ya katoloso ya mocheso 7.0×10-6/℃, conductivity ya mocheso 20-30W/K·m (mocheso wa kamore), dielectric constant 9-12 (IMHz), tahlehelo ya dielectric 3~10-4 (IMHz), ho hanyetsa bophahamo>1012-1014Ω·cm (mocheso wa kamore).
Ka ts'ebetso e phahameng le kopanyo e phahameng ea lipotoloho tse kopantsoeng, litlhoko tse thata haholoanyane li beoa pele bakeng sa li-substrate le thepa ea ho paka:
Ha tlhahiso ea mocheso ea chip e ntse e eketseha, ho hlokahala conductivity e phahameng ea mocheso.
Ka lebelo le phahameng la karolo ea k'homphieutha, ho hlokahala phetoho e tlase ea dielectric.
Ho hlokahala hore coefficient ea katoloso ea mocheso e be haufi le silicon. Sena se beha litlhoko tse phahameng ho α-alumina, ke hore, e hola ka lehlakoreng la bohloeki bo phahameng le botle.
3. Lebone le ntšang khanya ea sodium le nang le khatello e phahameng
Li-ceramic tse ntleE entsoe ka alumina e hloekileng haholo kaha thepa e tala e na le litšobotsi tsa ho hanyetsa mocheso o phahameng, ho hanyetsa ho bola, ho thibela ho bola hantle, matla a phahameng, jj., 'me ke thepa e ntle ea letsopa ea optical. Polycrystalline e bonaletsang e entsoe ka alumina e hloekileng haholo e nang le magnesium oxide e nyane, iridium oxide kapa li-additives tsa iridium oxide, 'me e entsoe ka sepakapaka se sintering le ho chesa haholo, e ka mamella ho bola ha mouoane oa sodium o mocheso o phahameng 'me e ka sebelisoa e le mabone a ntšang khanya ea sodium a khatello e phahameng a nang le bokhoni bo phahameng ba mabone.
Tšebeliso ea α-alumina ka har'a li-ceramic tsa meaho
Jwalo ka thepa ya bongaka e sa pheleng, thepa ya bioceramic ha e na ditlamorao tse kotsi ha e bapiswa le thepa ya tshepe le thepa ya polymer, mme e na le ho tsamaellana hantle ha bioceramic le ho hanyetsa mafome ka dinama tsa baeloji. Batho ba ntse ba e ananela haholo. Diphuputso le tshebediso ya bongaka ya thepa ya bioceramic di ntlafetse ho tloha ho nkela sebaka le ho tlatsa ka nako e kgutshwane ho isa ho kenngweng ha ka ho sa feleng le ho tiileng, le ho tloha ho thepa e sa sebetseng ya baeloji ho ya ho thepa e sebetsang ka baeloji le thepa e kopaneng ya mekhahlelo e mengata.
Lilemong tsa morao tjena, ho na le masobali-ceramic tsa aluminaLi sebelisitsoe ho etsa manonyeletso a maiketsetso a masapo, manonyeletso a mangole a maiketsetso, lihlooho tsa maiketsetso tsa femoral, masapo a mang a maiketsetso, metso ea meno a maiketsetso, li-screw tsa ho tiisa masapo, le litokiso tsa cornea ka lebaka la ho hanyetsa ho bola ha lik'hemik'hale, ho hanyetsa ho tsofala, botsitso bo botle ba mocheso o phahameng, le thepa ea thermoelectric. Mokhoa oa ho laola boholo ba masoba nakong ea ho lokisa li-ceramic tsa alumina tse nang le masoba ke ho kopanya likaroloana tsa alumina tsa boholo bo fapaneng ba likaroloana, ho kenya foam ka hare, le ho fafatsa likaroloana ka ho li omisa. Lipoleiti tsa aluminium li ka boela tsa etsoa anodized ho hlahisa masoba a mofuta oa kanale a nang le masoba a manyenyane a tataisoang.