1. Saense le Sebopeho sa Lisebelisoa tsa Alumina Porcelain
1.1 Crystallography le Comppositional Versions ea Light Weight Aluminium Oxide
(Mehele ea Alumina Ceramics)
Mehele ea aluminium ea ceramic e hlahisoa ho tloha boima bo bobebe ba aluminium oxide (Tse pedi O BORARO), ntho e tsebahalang ka ho leka-lekana ha matla a motjhini, tshireletso ya mocheso, le ho kenya motlakase.
Mokhahlelo o tsitsitseng oa thermodynamically le o loketseng indastering oa alumina ke alpha (a) sethala, e nang le sebopeho se nang le mahlakore a mararo a koaletsoeng (HCP) moralo oa ntlo ea litaemane.
Leanong lena, Li-ion tsa oksijene li etsa lesela le teteaneng le nang le li-ion tsa aluminium tse nkang karolo ea bobeli ho tse tharo ea libaka tsa octahedral interstitial., ho baka sebopeho sa athomo se tsitsitseng haholo le se matla.
Le hoja alumina e hloekileng e le khopolo-taba 100% Al ₂ O ₃, lihlahisoa tsa boemo ba indasteri hangata li na le likaroloana tse nyane tsa li-additives joalo ka silica (SiO ₂), magnesia (MgO), kapa yttria (Y ₂ O BORARO) ho laola kholo ea lijo-thollo nakong eohle ea sintering le ho ntlafatsa densification.
Li-ceramics tsa alumina li arotsoe ka maemo a bohloeki: 96%, 99%, le 99.8% Al Two O tse hlano li tloaelehile, e nang le bohloeki bo phahameng bo amanang le thepa e ntlafalitsoeng ea mochini, conductivity ea mocheso, le khanyetso ea lik'hemik'hale.
The microstructure– haholo boholo ba lijo-thollo, porosity, le ho potoloha ha mokhahlelo– e bapala karolo ea bohlokoa ho tsebahatseng ts'ebetso ea ho qetela ea mehele ea alumina libakeng tsa lits'ebeletso.
1.2 Leqheka Thepa ea 'Mele le Mechini
Mehele ea aluminium ea ceramic e bonts'a sehlopha sa meaho e etsang hore e be ea bohlokoa maemong a boima a indasteri.
Ba na le matla a phahameng a khatello (joalo ka 3000 MPa), matla a flexural (hangata 350– 500 MPa), le botsitso bo fetisisang (1500– 2000 HV), ho etsa hore ho khonehe bakeng sa ho hanyetsa ho sebelisoa, ho khopa, le deformation tlas'a lotho.
Coefficient ea bona e tlase ea katoloso ea mocheso (hoo e ka bang 7– 8 × 10 ⁻⁶/ K) e etsa tshireletso e itseng ya dimensional ho pholletsa le mefuta e mengata ea mocheso, ho fokotsa tsitsipano ea mocheso le ho robeha nakong ea libaesekele tse futhumatsang.
Thermal conductivity mefuta e sa tsoaneng ho tloha 20 ho 30 W/m · K, ho itshetlehile ka bohlweki, ho dumella ho qhalana hoa mocheso o itekanetseng– lekane bakeng sa lits'ebetso tse ngata tsa mocheso o phahameng ntle le tlhokahalo ea ho futhumatsa moea o matla.
( Alumina Ceramics Ring)
Ka motlakase, alumina ke insulator e ikhethang e nang le matla a mangata a ho hanyetsa 10 ¹⁴ Ω · disentimitara le dielectric stamina tse ka bang 10– 15 kV/mm, e etsa hore e be e phethahetseng bakeng sa likarolo tse phahameng tsa motlakase oa motlakase.
Ho feta moo, alumina e bonts'a khanyetso e kholo ea tlhaselo ea lik'hemik'hale ho tsoa ho acid, antacid, le litšepe tse qhibilihisitsoeng, le hoja e ka hlaseloa habonolo ke antacid e tiileng le hydrofluoric acid ka mocheso o phahameng.
2. Boenjiniere ba Tlhahiso le bo Nepahetseng ba Mehele ea Alumina
2.1 Mokhoa oa ho sebetsana le phofo le mekhoa ea ho bōpa
Tlhahiso ea mehele ea tšepe ea alumina ceramic e sebetsang hantle e qala ka khetho le mosebetsi oa pele oa phofo ea alumina e hloekileng..
Hangata li-powder li etsoa ka calcination ea aluminium hydroxide kapa ka mekhoa e tsoetseng pele joalo ka ho sebetsana le sol-gel ho fihlela boholo bo lekaneng le kabo ea boholo bo moqotetsane..
Ho theha geometry ea selikalikoe, mekhoa e mengata ea ho bopa e sebelisoa, ho kenyeletsa:
Ho sututsa uniaxial: moo phofo e hatelloang ka lefu tlas'a khatello e matla ho hlahisa a “botsoalle tikoloho” selikalikoe.
Isostatic tobetsa: ho sebelisa khatello e ts'oanang ho tsoa litaelong tsohle ho sebelisa mochini oa mokelikeli, ho baka botenya bo boholo le sebopeho sa microstructure se tsitsitseng, haholo bakeng sa masale a rarahaneng kapa a maholohadi.
Extrusion: e loketseng bakeng sa mefuta e telele ea cylindrical eo hamorao e fokotsoang hantle ka mehele, hangata e sebelisoa bakeng sa lits'ebetso tse nepahetseng tse tlase.
Ho bopa ka ente: e sebelisoa bakeng sa li-geometri tse rarahaneng le mamello e fokolang, moo phofo ea alumina e kopantsoeng le se tlamang ka polymer le ho kenngoa ka har'a hlobo.
Mokhoa o mong le o mong o ama botenya ba ho qetela, ho tsamaisana ha lijo-thollo, le ho potoloha ha mathata, e hloka khetho e hlokolosi ea ts'ebetso e ipapisitseng le litlhoko tsa kopo.
2.2 Sintering le Microstructural Advancement
Ka mor'a ho theha, mehele e baballang tikoloho e kena mocheso o phahameng oa mocheso, ka kakaretso mahareng 1500 ° C le 1700 ° C moeeng kapa tikolohong e laoloang.
Nakong ea sintering, diffusion disebediswa tsamaisa fragment coalescence, ho ntšoa ha masoba, le tsoelo-pele ea lijo-thollo, ho fella ka 'mele o teteaneng oa ceramic ka ho feletseng.
Sekhahla sa ho futhumatsa, ho tshoara nako, le boemo ba ho pholisa bo laoloa ka nepo ho thibela ho phatloha, kobeha, kapa ntshetsopele ya mabele e fetelletseng.
Lisebelisoa tse kang MgO hangata li hlahisoa ho thibela ho fetoha ha moeli oa lijo-thollo, ho baka microstructure e ntle e ntlafatsang matla a mochine le ho tšepahala.
Post-sintering, mehele ea alumina e ka 'na ea siloa le ho fafatsoa ho finyella mamello e tiileng ( ± 0.01 mm) le ultra-boreleli holim'a sebaka finishes (Ra < 0.1 µm), essential for securing, bearing, and electrical insulation applications.
3. Ts'ebetso ea Ts'ebetso le Likopo tsa Indasteri
3.1 Lisebelisoa tsa Mechini le Tribological
Mehele ea aluminium ea ceramic e sebelisoa haholo lits'ebetsong tsa mochini ka lebaka la ho hanyetsa ha bona le botsitso ba sebopeho..
Lisebelisoa tsa lekunutu li kenyelletsa:
Ho tiisa mehele ka lipompo le shutoffs, moo ba hanang ho arohana ho tsoa ho li-slurries tse sa thabiseng le maro a senyang ts'ebetsong ea lik'hemik'hale le oli. & liindasteri tsa khase.
Likarolo tsa tsoalo maemong a lebelo le phahameng kapa a senyang moo li-bearings tsa tšepe li ka fokolisang kapa li hlokang ho tlotsoa khafetsa..
Kakaretso mehele le lihlahla ka lithulusi tsa othomathike, ho sebedisa kgohlang e tlase le bophelo bo bolelele ba tshebeletso ntle le tlhoko ya ho tlotsa.
Sebelisa mehele ho li-compressor le li-turbine, ho fokotseha ha ho hlaka pakeng tsa likarolo tse bilikang le tse emeng tlas'a mathata a khatello e phahameng.
Bokhoni ba bona ba ho boloka ts'ebetso maemong a leholimo a omileng kapa a tletseng bora a lik'hemik'hale bo ba etsa hore ba phahamele likhetho tse 'maloa tsa tšepe le polymer..
3.2 Mesebetsi ea Insulation ea Mocheso le Motlakase
Litsamaisong tsa mocheso o phahameng le oa matla a phahameng, mehele ea alumina e sebetsa e le likarolo tsa bohlokoa tse sireletsang.
Li sebelisoa e le:
Li-insulators linthong tse futhumatsang le lisebelisoa tsa sebōpi, moo li bolokang lithapo tse hanyetsanang ha li ntse li mamella maemo a mocheso ho feta 1400 °C.
Ho fepa ka li-insulators ho vacuum cleaner le litsamaiso tsa plasma, ho qoba arcing ea motlakase ha u ntse u boloka litiiso tsa hermetic.
Li-spacers le mehele ea tšehetso ka lisebelisoa tsa elektroniki tsa matla le switchgear, ho arola likarolo tsa conductive ho li-transformer, li-circuit breakers, le tsamaiso ea libese.
Mehele ea dielectric ka lisebelisoa tsa RF le microwave, moo tahlehelo ea bona e tlase ea dielectric le boima bo phahameng ba ho senyeha ho tiisang ponts'o ea botšepehi.
Motsoako oa matla a phahameng a dielectric le ts'ireletso ea mocheso o lumella mehele ea alumina ho sebetsa ka nepo sepakapakeng moo li-insulators tsa tlhaho li ka fokolisang matla..
4. Lintlafatso tsa Sehlahisoa le Pono ea Bokamoso
4.1 Motsoako le Doped Alumina Tharollo
Ho eketsa katleho, bafuputsi le bahlahisi ba theha metsoako e tsoetseng pele e thehiloeng ho alumina.
Mehlala e kenyeletsa:
Alumina-zirconia (Al ₂ O FOUR-ZrO PEDI) metsoako, e bonts'ang matla a ntlafetseng a crack ka lisebelisoa tse thata tsa phetoho.
Alumina-silicon carbide (Al ₂ O SIX-SiC) nanocomposites, moo likotoana tsa SiC tse boholo ba nano li matlafatsang ho tiea, ho hanyetsa mocheso oa mocheso, le creep resistance.
Alumina e sa tloaelehang ea lefatše, e ka fetolang lik'hemik'hale tsa moeli oa lijo-thollo ho ntlafatsa boemo bo phahameng ba mocheso le ho hanyetsa oxidation.
Lisebelisoa tsena tse nyalisitsoeng li lelefatsa enfelopo e sebetsang ea mehele ea alumina ho kena mathateng a tebileng le ho feta, joalo ka phallo e matla haholo kapa ho palama baesekele ka lebelo le futhumetseng.
4.2 Li-Fads tse Hlahang le Motsoako oa Theknoloji
Bokamoso ba mehele ea alumina ceramic e ka har'a kopanyo e bohlale le tlhahiso e nepahetseng.
Mekhoa e kenyeletsang:
Tlhahiso e eketsehileng (3D khatiso) ea likarolo tsa alumina, ho etsa hore lijeometri tse rarahaneng tsa ka hare le litlhophiso tsa mehele tsa motho ka mong li neng li ke ke tsa finyelloa ka mekhoa e tloaelehileng.
Kereiti e sebetsang, moo sebopeho kapa sebopeho se senyenyane se fapanang ka bophara ba selikalikoe ho holisa ts'ebetso libakeng tse fapaneng (mohlala, lera le sa keneleng ka ntle le nang le motheo oa thermally conductive).
Ts'ebetso ea in-situ ka li-sensor tse kentsoeng ka har'a mehele ea ceramic bakeng sa ho boloka mochini oa indasteri..
Tšebeliso e eketsehileng lits'ebetsong tsa matla a tsosolositsoeng, joalo ka lisele tsa mafura a mocheso o phahameng le litsi tse tsepamisitsoeng tsa matla a letsatsi, moo ho ts'epahala ha sehlahisoa tlas'a khatello ea mocheso le lik'hemik'hale le matšoenyeho li bohlokoa.
Kaha limmaraka li hloka ts'ebetso e phahameng, nako e telele ea bophelo, le tlhokomelo e fokotsehileng, mehele ea aluminium ea ceramic ka sebele e tla lula e bapala mosebetsi oa bohlokoa ho nolofalletsang likhetho tsa boenjiniere ba moloko o latelang.
5. Mofani
Alumina Technology Co., Ltd e shebane le lipatlisiso le nts'etsopele, tlhahiso le thekiso ea phofo ea aluminium oxide, lihlahisoa tsa aluminium oxide, aluminium oxide crucible, etc., ho sebeletsa lisebelisoa tsa elektroniki, li-ceramics, liindasteri tsa lik'hemik'hale le tse ling. Ho tloha ha e thehoa ka 2005, k'hamphani e ikemiselitse ho fa bareki lihlahisoa le litšebeletso tse ntle ka ho fetisisa. Haeba u batla boleng bo phahameng alumina e thata ka zirconia, ka kopo ikutloe u lokolohile ho ikopanya le rona. ([email protected])
Li-tag: Alumina Ceramics, aluminium, aluminium oxide
Lingoliloeng tsohle le litšoantšo li tsoa Marang-rang. Haeba ho na le litaba tsa copyright, ka kopo ikopanye le rona ka nako ho hlakola.
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