1. The Material Foundation le Crystallographic Identification of Alumina Ceramics
1.1 Atomic Style le Phase Security
(Alumina Ceramics)
Li-porcelains tsa aluminium, hangata e entsoe ka boima bo bobebe ba aluminium oxide (Ka bobeli O PEDI), e emela e 'ngoe ea lihlopha tse sebelisoang haholo tsa lirafshoa tse ncha ka lebaka la teka-tekano e makatsang ea matla a mochini., matla a mocheso, le inertness ea lik'hemik'hale.
Ka tekanyo ea athomo, katleho ea alumina e thehiloe ka sebopeho sa eona sa kristale, ka karolo ea alpha e sireletsehileng ea thermodynamically (α-Al ₂ O TŠELELA) ho ba mofuta o ka sehloohong o sebelisoang lits'ebetsong tsa moralo.
Mokhahlelo ona o amohela tsamaiso ea kristale ea rhombohedral ka har'a hexagonal e haufi-ufi (HCP) lethati, moo li-anion tsa oksijene li etsang tlhophiso e teteaneng le li-aluminium tse boima bo bobebe li nka karolo ea bobeli ho tse tharo ea liwebsaete tsa octahedral interstitial.
Moralo oa sephetho o tsitsitse haholo, e eketsa ho melting e phahameng ea alumina hoo e ka bang 2072 ° C le ho hanyetsa ha eona ho bola tlas'a maemo a feteletseng a mocheso le lik'hemik'hale.
Ha mekhahlelo ea alumina ea nakoana e kang gamma (c), delta (d), le theta (ke) li teng ka mocheso o tlase 'me li bonts'a libaka tse holimo, li na le metastable 'me li ke ke tsa fetoloa hore e be karolo ea alpha ha li futhumatsa 1100 °C, ho etsa α-Al two O ₃ sethala se ikhethileng bakeng sa likarolo tsa meralo tse sebetsang hantle le tse sebetsang..
1.2 Comppositional Grading le Microstructural Engineering
Matlo a porcelain ea alumina ha a hlokomeloe empa a ka hlophisoa ka mefuta e laoloang ka bohloeki., tekanyo ea lijo-thollo, le tlatsetso ea lithuso tsa sintering.
Alumina e hloekileng e phahameng (≥ 99.5% Al ₂ O ₃) e sebelisoa lits'ebetsong tse hlokang matla a phahameng a mochini, ho kenya letsoho motlakase, le ho hanyetsa ho ata ha ion, joalo ka ts'ebetsong ea semiconductor le li-insulator tse matla a phahameng.
Limaraka tse tlase tsa bohloeki (ho fapana le 85% ho 99% Al Two O PEDI) hangata e kopanya mekhahlelo ea bobeli joalo ka mullite (3Ka bobeli O FIVE · 2SiO ₂) kapa li-silicate tse benyang, e ntlafatsang sinterability le ho hanyetsa mocheso oa mocheso ka litšenyehelo tsa ho tiea le ts'ebetso ea dielectric.
Ntho ea bohlokoa ho ntlafatseng ts'ebetso ke taolo ea boholo ba lijo-thollo; sebopeho se setle sa grained, finyelloa ka ntlafatso ea magnesium oxide (MgO) joalo ka thibelo ea nts'etsopele ea lijo-thollo, ntlafatsa ka mokhoa o makatsang ho tiea ha fracture le ho tiea ha flexural ka ho fokotsa ho ata ha petso.
Porosity, esita le maemong a tlase, e na le phello e kotsi ho botšepehi ba mechine, 'me li-ceramics tsa alumina tse teteaneng ka ho felletseng hangata li hlahisoa ka mekhoa ea sintering e thusoang ke khatello joalo ka ho sututsa ho chesang kapa ho sututsa ho chesang ha isostatic. (HIP).
Tšebelisano lipakeng tsa tlhamo, microstructure, le ts'ebetso e totobatsa enfelopo ea bohlokoa eo li-porcelain tsa alumina li sebetsang ka har'a tsona, ho nolofalletsa tšebeliso ea tsona ho pholletsa le mefuta e mengata ea mabitso a libaka tsa indasteri le tsa tekheniki.
( Alumina Ceramics)
2. Sebetsa sa Mechene le Thermal ho Tikoloho e Batlang
2.1 Matla, Ho tiea, le Wear Resistance
Li-ceramics tsa aluminium li bonts'a motsoako o ikhethang oa ho tiea ho hoholo le "crack sturdness" e itekanetseng, li etsa hore li be ntle bakeng sa lits'ebetso tse kenyelletsang moaparo o sa thabiseng, khoholeho ea mobu, le tshusumetso.
Ka Vickers botsitso bo atisang ho fapana ho tloha 15 ho 20 Karolelano ea lintlha tsa mophato, maemo a alumina har'a lihlahisoa tse thata ka ho fetisisa tsa boenjiniere, e fetiloeng feela ke ruby, li-cubic boron nitride, le li-carbides tse itseng.
Ho thatafala hona ho matla ho fetoha ho hanyetsa ho hoholo ho hoholo, ho sila, le ho kenngoa ha likhechana, se sebedisoang ka dikarolong tse tshoanang le metsu ya lehlabathe, lisebelisoa tsa ho seha, pompo litiiso, le lilara tse sa aparoeng.
Flexural matla a bohlokoa bakeng sa mefuta e fapaneng ea alumina e teteaneng ho tloha 300 ho 500 MPa, ho itšetlehile ka bohloeki le microstructure, athe stamina e hatellang e ka fetela ho feta 2 Karolelano ea lintlha tsa mophato, ho nolofalletsa likarolo tsa alumina ho mamella lithane tse phahameng tsa mochini ntle le ho ferekana.
Ho sa tsotellehe bofokoli ba eona– tšobotsi e tloaelehileng har'a li-porcelain– Ts'ebetso ea alumina e ka ntlafatsoa ka sebopeho sa geometri, mesebetsi ea ho imolla khatello ea maikutlo, le mekhoa e mengata ea tšehetso, joalo ka ho kopanngoa ha likotoana tsa zirconia ho hlahisa makeover toughening.
2.2 Mekhoa ea Mocheso le Tšireletso ea Dimensional
Thepa ea bolulo e futhumetseng kapa ea khoebo ea li-porcelain tsa alumina li bohareng ba ts'ebeliso ea tsona maemong a mocheso o phahameng le a libaesekele tsa thermally..
Ka conductivity ea mocheso ea likhato tse 20– 30 W/m · K– e kholo ho feta li-polymer tse ngata mme e ka bapisoa le litšepe tse ling– alumina ka katleho e qhala mocheso, ho etsa hore e tshwanele disinki tse futhumetseng, li-insulating substrates, le likarolo tsa sebōpi.
Coefficient ea eona e tlase ea nts'etsopele ea mocheso (~ 8 × 10 ⁻⁶/ K) e netefatsa phetoho e nyane haholo nakong eohle ea ho futhumatsa le ho futhumatsa, ho fokotsa kotsi ya ho phatloha ho hoholo ha mocheso.
Botsitso bona bo bohlokoa haholo lits'ebetsong tse joalo ka li-tubes tsa ts'ireletso tsa thermocouple, li-insulator tsa tsamaiso ea mollo, le semiconductor wafer e hlokomelang litsamaiso, moo taolo e nepahetseng ya dimensioni e leng bohlokwa.
Alumina e boloka botsitso ba eona ba mochini hoo e ka bang maemo a mocheso a 1600– 1700 ° C moeeng, ka nqane ho moo ho ka qaleha ho thella le ho thella, ho itšetlehile ka bohloeki le microstructure.
Sesepang sa vacuum cleaner kapa sebakeng se se nang moea, tshebetso ya yona e atoloha le ho feta, ho e etsa sehlahisoa se ratoang bakeng sa lisebelisoa tse thehiloeng sebakeng le liteko tsa fisiks ea matla a phahameng.
3. Litšobotsi tsa Motlakase le Dielectric bakeng sa Advanced Technologies
3.1 Lisebelisoa tsa Insulation le High-Voltge
E 'ngoe ea litšoaneleho tse bohlokoahali tsa li-porcelain tsa alumina ke matla a tsona a ikhethang a ho kenya motlakase.
E nang le resistivity ea molumo e fetang 10 ¹⁴ Ω · disentimitara mocheso wa sebaka le matla a dielectric a 10– 15 kV/mm, alumina e sebetsa e le insulator e tšepahalang lits'ebetsong tse phahameng tsa motlakase, ho kenyelletsa le lisebelisoa tsa phetisetso ea matla, switchgear, le sephutheloana sa digital.
Dielectric ea eona e tsitsitse (εᵣ ≈ 9– 10 ho 1 MHz) e sireletsehile ka mokhoa o nepahetseng ho pholletsa le mefuta e mengata ea maqhubu, e etsa hore e be e loketseng ho sebelisoa ka li-capacitor, Likarolo tsa RF, le li-substratum tsa microwave.
Tahlehelo e tlase ea dielectric (joalo δ < 0.0005) makes certain marginal energy dissipation in rotating existing (AIR CONDITIONING) applications, boosting system effectiveness and reducing heat generation.
Lebotong la bo-mme le hatisitsoeng (Li-PCB) le hybrid microelectronics, li-alumina substrates li fana ka thuso ea mochini le ho itšehla thajana ka motlakase bakeng sa mesaletsa ea conductive, ho lumella ho ts'oaroa ha potoloho e matla haholo maemong a thata.
3.2 Bokhoni ba Tikoloho e Feteletseng le e Bonolo
Li-ceramics tsa aluminium li lumellana ka ho hlaka hore li sebelisoe ho vacuum cleaner, cryogenic, le libaka tse nang le mahlaseli a kotsi ka lebaka la ho fokotseha ha theko ea tsona le ho hanyetsa mahlaseli a ionizing.
Ka li-accelerator tsa likaroloana le li-reactor tse kopaneng, li-insulators tsa alumina li sebelisoa ho arola li-electrode tse phahameng tsa motlakase le li-sensor tsa tlhahlobo ntle le ho hlahisa litšila kapa tse nyenyefatsang tlasa ts'oaetso ea nako e telele ea mahlaseli..
Sebopeho sa tsona se seng sa makenete se boetse se li etsa hore e be tse loketseng lits'ebetso tse kenyelletsang matla a matla a khoheli, joalo ka imaging resonance magnetic (MRI) litsamaiso le limakete tse kholo.
Ho feta moo, Ho lumellana ha alumina le ho se sebetse ha lik'hemik'hale ho hlile ho tlisitse ho amoheloa ha eona ho lisebelisoa tsa bongaka, ho kenyeletsoa li-implants tsa molomo le likarolo tsa masapo, moo tšireletseho e tšoarellang le ho se kenye letsoho ho leng bohlokoa.
4. Indasteri, Theknoloji, le Lisebelisoa tse Hlahang
4.1 Mosebetsi ho Thepa ea Indasteri le Ts'ebetso ea Lik'hemik'hale
Li-porcelain tsa aluminium li sebelisoa ka botlalo lisebelisoa tsa khoebo moo ho hanyetsanoang ho apareloa, ho senyeha, le mocheso o phahameng oa hlokahala.
Likarolo tse kang pompo litiiso, litulo tsa valve, li-nozzles, 'me mecha ea phatlalatso ea ho sila hangata e etsoa ho tloha alumina ka lebaka la bokhoni ba eona ba ho mamella li-slurries tse sa thabiseng., lik'hemik'hale tse mabifi, le mocheso o phahameng.
Limeleng tse sebetsanang le lik'hemik'hale, aluminium linings e sireletsa li-activators le liphaephe ho tloha ha acid le alkali e otla, ho eketsa bophelo ba lisebelisoa le ho fokotsa litšenyehelo tsa ho boloka.
Ho se sebetse ha eona le hona ho etsa hore e tšoanelehe ho sebelisoa kahong ea semiconductor, moo taolo ea tšilafalo e leng bohlokoa; Likamore tsa alumina le liketsoana tsa liphaephe li senoleloa ho plasma etching le sepakapaka sa khase e hloekileng ntle le litšila tse kenang..
4.2 Assimilation hantle ho Advanced Production le Future Technologies
Lisebelisoa tse tloaelehileng tse fetileng, li-ceramics tsa alumina li bapala mosebetsi oa bohlokoa haholo ho hlahiseng mekhoa e mecha.
Ka tlhahiso ea tlatsetso, li-alumina powders li sebelisoa ho binder jetting le stereolithography (MOAHISANE MAHALA) hlwekisa ho etsa hore ho be thata, likarolo tse hanyetsanang le mocheso o phahameng bakeng sa litsamaiso tsa sefofane le matla.
Lifilimi tsa nanostructured alumina li ntse li hlahlojoa bakeng sa thuso ea matla, diyuniti tsa kutlo, le li-finishing tse thibelang ho bonahatsa ka lebaka la lik'hemik'hale tsa tsona tse phahameng le tse ka sebelisoang.
Holim'a moo, metsoako e entsoeng ka aluminium, joalo ka Al Two O FOUR-ZrO ₂ kapa Al Two O FOUR-SiC, li ntse li ntlafatsoa ho hlola brittleness ea kahare ea alumina ea monolithic, e fanang ka botsitso bo matlafalitsoeng le ho hanyetsa mocheso oa mocheso bakeng sa thepa ea meralo ea moloko o latelang.
Ha makala a ntse a tsoela pele ho sutumelletsa meeli ea ts'ebetso le bots'epehi, li-ceramics tsa alumina li ntse li le mothating o ka sehloohong oa tlhahiso ea thepa, ho kopanya sebaka se pakeng tsa katleho ya sebopeho le boiketlo ba tshebetso.
Ka kakaretso, li-ceramics tsa alumina ha se feela mokhoa oa lisebelisoa tse hanyetsanang empa ke lejoe la bohlokoa la moralo oa sejoale-joale, ho dumella kgatelopele ya thekenoloji ho phatlalla le eneji, lisebelisoa tsa elektronike, tlhokomelo ea bophelo, le boiketsetso ba khoebo.
Motsoako oa bona o ikhethileng oa meaho– e metse ka har'a moralo oa athomo le ho ntlafatsoa ka ho sebetsana ka mokhoa o rarahaneng– e netefatsa bohlokoa ba bona bo tsoelang pele lits'ebetsong tse ntlafalitsoeng le tse hlahang.
Ha mahlale a lintho tse bonahalang a ntse a tsoela pele, ha ho pelaelo hore alumina e tla lula e le sesebelisoa sa bohlokoa sa lits'ebetso tse phahameng tse sebetsang ntle le maemo a feteletseng a 'mele le tikoloho..
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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