1. Lintho tsa motheo tsa lintho tse bonahalang le Microstructural Layout
1.1 Make-up le Crystallographic Stability ea Alumina
(Alumina Ceramic Nozzles)
Alumina (Al ₂ O PEDI), haholo-holo mokhahlelong oa eona oa alpha, ke ceramic e nang le oxidized ka ho feletseng e nang le mohaho o haufi-ufi oa mofuta oa corundum hexagonal, ho fana ka botsitso bo tsotehang ba mocheso, inertness ea lik'hemik'hale, le matla a ho sebetsa ha mocheso o phahame.
Alumina e hloekileng e phahameng (hangata 95– 99.9% Al ₂ O TŠELELA) e ratoa bakeng sa lisebelisoa tsa nozzle ka lebaka la litaba tsa eona tse silafetseng tse fokolang, e fokotsang ho fokola ha lijo-thollo le ho ntlafatsa ho hanyetsa mocheso le ho senyeha ha lik'hemik'hale.
The microstructure, ho kenyelletsa hantle, equiaxed grain, e entsoe nakong ea sintering ho fokotsa porosity le ho sebelisa botenya hantle, e ama ka ho toba khanyetso ea khoholeho ea nozzle le botšepehi ba sebopeho tlas'a phallo e phahameng ea metsi.
Lisebelisoa tse joalo ka MgO hangata li hlahisoa ka mokhoa o felletseng ho thibela nts'etsopele ea lijo-thollo tse sa tloaelehang nakong eohle ea sintering., ho etsa hore ho be le sebopeho sa microstructure se ts'ehetsang botšepehi bo sa feleng.
1.2 Thepa ea Mechini le Thermal e Amanang le Bokhoni ba Nozzle
Li-ceramics tsa alumina li bonts'a ho tiea ha Vickers ho feta 1800 HV, ho etsa hore di mamelle ho koaheloa ka makukuno ho tsoa marong a tletseng makukuno, tšobotsi ea bohlokoa lits'ebetsong tse kang sandblasting le ho itšeha ha metsi ho sa thabiseng.
Ka matla a flexural a 300– 500 MPa le toughness compressive over 2 GPA, li-nozzles tsa alumina li boloka tšireletso e lekantsoeng tlas'a ts'ebetso ea khatello e phahameng, hangata ho tloha ho 100 ho 400 MPa lits'ebetsong tsa indasteri.
Thermally, alumina e boloka meaho ea eona ea mochini joalo ka 1600 °C, e nang le coefficient e fokotsehileng ea ho atolosa mocheso (~ 8 × 10 ⁻⁶/ K) e fanang ka khanyetso e ikhethang ea mocheso oa mocheso– ea bohlokoa ha e le ka tlas'a maemo a fapaneng a mocheso ka potlako nakong ea ho qala kapa ho koala.
Ts'ebetso ea eona ea mocheso (~ 30 W/m · K) ho lekane ho qhala mocheso oa sebaka ntle le ho baka matsoapo a chesang a ka lebisang ho arohana, ho tsitsisa insulation le litlhoko tse mofuthu tsa tsamaiso.
2. Mekhoa ea Tlhahiso le ho Nepaha ha Geometri
2.1 Mekhoa ea ho Bopa le ho Sintering bakeng sa Tlhahiso ea Nozzle
Tlhahiso ea li-nozzles tsa alumina ceramic e qala ka phofo ea alumina ea bohloeki bo phahameng, e hloekisitsoeng hantle 'meleng o motala o sebelisang mekhoa e kang pholiso ea isostatic (CIP), ho bopa ka ente, kapa extrusion, ho ipapisitse le geometry e lakatsehang le boholo bo behiloeng.
( Alumina Ceramic Nozzles)
Cold isostatic pressing e sebelisa khatello e tšoanang ea litaelo tsohle, ho etsa hore ho be le phallo e tšoanang ea boima ba 'mele e hlokahalang bakeng sa ho fokotsa bofokoli nakong ea sintering.
Ente e sebelisoa bakeng sa libopeho tse rarahaneng tsa nozzle tse nang le li-taper tse ka hare le li-orifices tse kholo, ho nolofalletsa ho nepahala ha maemo a holimo le ho ikatisa tlhahisong ea bongata.
Kamora ho bopa, li-compacts tse tala li etsa phekolo ea mocheso oa mekhahlelo e 'meli: debinding ho felisa manyolo binders le sintering mocheso pakeng 1500 ° C le 1650 ° C ho fihlela botenya bo haufi-ufi ka ho pharalla ha boemo bo tiileng.
Taolo e nepahetseng ea tikoloho ea sintering le litheko tsa ho futhumatsa / ho bata ke tsa bohlokoa ho sireletsa khahlanong le ho kobeha, ho qhaqhoa, kapa lijo-thollo tse mahoashe tse ka behang ts'ebetso ea nozzle kotsing.
2.2 Mochini, Ho Phahamisa, le Taolo ea Boleng
Post-sintering, li-nozzles tsa alumina hangata li hloka mochini o nepahetseng ho fumana khanyetso e matla, haholo-holo sebakeng sa orifice moo litšoaneleho tsa phallo li amehang haholo pheletsong ea sebaka le geometry.
Ho sila le ho hlatsoa litaemane ho sebelisoa ho hloekisa libaka tse ka hare le tse ka ntle, ho fihlella maemo a mabenyane a thathamisitsoeng ka tlase 0.1 µm, e fokotsang khanyetso ea phallo le ho qoba ho bokellana ha nyane.
The orifice, hangata e fapaneng le 0.3 ho 3.0 mm ka boholo, lokela ho ba ntle le mapetsong a manyenyane le chamfers ho etsa bonnete ba ho potoloha ha laminar le mekhoa ea kamehla ea ho fafatsa.
Mekhoa ea tlhahlobo e sa senyeheng joalo ka microscope ea optical, Tlhahlobo ea X-ray, le litlhahlobo tsa khatello ea libaesekele li sebelisoa ho netefatsa botsitso ba meralo le ts'ebetso e ts'oanang pele e romelloa..
Li-geometri tse entsoeng ka mokhoa o ikhethileng, e nang le convergent-divergent (ho tloha Laval) profiles bakeng sa ho potoloha ha supersonic kapa mefuta e mengata ea likoti bakeng sa mekhoa ea ho fafatsa balateli, li hlahisoa haholo ho sebelisoa lisebelisoa tse ncha le moralo o thusoang ke komporo (CAD)-tlhahiso e khannoang.
3. Melemo e Sebetsang ho Feta Lisebelisuoa Tse Ling tsa Nozzle
3.1 Karohano e Phahameng ka ho Fetisisa le Khanyetso ea Corrosion
E bapisoa le metallic (mohlala, tungsten carbide, ts'epe e sa beng le mabali) kapa li-nozzles tsa polymer, alumina e bonts'a khanyetso e kholo ho feta ea ho roala ha abrasive, haholo-holo libakeng tse kenyeletsang lehlabathe la silica, garnet, kapa li-abrasive tse ling tse thata tse sebelisoang ho lokisa le ho seha holim'a metsi.
Li-nozzles tsa tšepe li senyeha ka potlako ka lebaka la micro-fracturing le deformation ea polasetiki, e hlokang sebaka sa kamehla, athe li-nozzles tsa alumina li ka tšoarella 3– 5 nako e telele ho feta, ho fokotsa haholo nako ea ho theoha le litheko tse sebetsang.
Holim'a moo, alumina ke inert ho acid tse ngata, antacid, le solvents, ho etsa hore e lokele ho fafatsa ka dikhemikhale, etching, le mekhoa ea ho hloekisa moo likarolo tsa tšepe li neng li ka rusa kapa li tšoaetsa mokelikeli.
Ts'ireletso ena ea lik'hemik'hale e bohlokoa haholo tlhahisong ea semiconductor, ts'ebetso ea meriana, le lisebelisoa tsa boemo ba lijo tse hlokang bohloeki bo phahameng.
3.2 Thermal le Motlakase Insulation Thepa
Alumina e phahameng ea ho hanyetsa motlakase (> 10 ¹⁴ Ω · lisentimitara) e etsa hore e loketse ho sebelisoa ka litsamaiso electrostatic spray koahela, moo e qobang ho dutla ha ditjeo mme e netefatsa atomization ya pente e tshwanang.
Bokhoni ba eona ba ho kenya letsoho mochesong bo lumella ts'ebetso e bolokehileng sebakeng sa mocheso o phahameng oa ho fafatsa, joalo ka ho kgaphatsa mollong kapa tlhoekiso ya mocheso, ntle le ho fetisetsa mocheso ho likarolo tse moeling.
Ho fapana le litšepe, alumina ha e bake karabelo e sa lakatseheng ea ketane melapong ea mokelikeli o arabelang, ho boloka seriti sa litharollo tse bobebe.
4. Lisebelisoa tsa Indasteri le Phello ea Setsebi
4.1 Mesebetsi ho Abrasive Jet Machining le Surface Treatment
Li-nozzles tsa ceramic tsa aluminium li bohlokoa lits'ebetsong tse matla tsa ho phatloha bakeng sa ho tlosa kutu, ho tlosa pente, le bokaholimo ba mongolo ka auto, sefofane, le makala a kaho.
Bokhoni ba bona ba ho boloka bophara bo tloaelehileng ba orifice holim'a ts'ebeliso e telele bo etsa bonnete ba hore ho na le sekhahla se tsitsitseng se tsitsitseng le angle ea tšusumetso, ka ho toba susumetsa holim'a sebaka qete boleng bo holimo le mokhoa repeatability.
Ka ho itšeha ha metsi a jet, li-tubes tse lebisang tlhokomelo ea alumina li lebisa motsoako o phahameng oa khatello ea metsi, ho ema kgahlanong le matla a hlabang a ka senyang dihlahiswa tse bonolo kapele.
4.2 Sebelisa ho Additive Manufacturing, Ho roala ka Spray, le Taolo ea Mokelikeli
Litsamaisong tsa ho fafatsa ka mocheso, joalo ka plasma le ho phatloha ha lelakabe, li-nozzles tsa alumina li tsamaisa phallo ea khase ea mocheso o phahameng le likaroloana tse qhibilihisitsoeng holim'a substrates, ho fumana tshireletso ya bona ya mocheso wa mocheso le tshireletseho ya dimensional.
Ka mokhoa o ts'oanang, li sebelisoa ka li-nozzles tse nepahetseng bakeng sa lik'hemik'hale tsa temo, tsamaiso ea inkjet, le atomization ea khase, moo ho hanyetsoa ha ho apara ho tiisang ho nepahala ha kopo ea nako e telele.
Ka khatiso ea 3D, haholo-holo ho jetting ea binder le extrusion ea lihlahisoa, li-nozzles tsa alumina li fana ka li-powders tse ntle haholo kapa li-viscous pastes tse nang le thipa e nyane haholo kapa e senyehileng.
Lisebelisoa tse hlahang li na le lisebelisoa tsa microfluidic le lisebelisoa tsa lab-on-a-chip, moo likarolo tsa alumina tse nyenyane li sebelisang ho tiea le ho lumellana ha lintho.
Ka kakaretso, li-nozzles tsa alumina ceramic li emela tsela ea bohlokoa ea mahlale a thepa le boenjiniere ba indasteri.
Motsoako oa bona o ikhethang oa ho tiea, tshireletso ya mocheso, le khanyetso ea lik'hemik'hale e etsa hore ho khonehe hore ho be le ts'ebetso e ka tšeptjoang libakeng tse 'maloa tse hlokang ka ho fetisisa tsa ho sebetsana le mokelikeli.
Ha mekhoa ea khoebo e sutumelletsa khatellong e kholo, khanyetso e ntle, le nako e telele ea tharollo, li-ceramics tsa alumina li tsoela pele ho beha mokhoa oa ho tiea, likarolo tse phahameng tsa taolo ea phallo e nepahetseng.
5. Morekisi
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 aluminium al2o3, ka kopo ikutloe u lokolohile ho ikopanya le rona. ([email protected])
Li-tag:
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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