1. Ihe ndị bụ isi na nhazi microstructural
1.1 Ime-elu na Crystallographic kwụsie ike nke Alumina
(Alumina seramiiki nozzles)
Alumina (Al ₂ O Abụọ), karịsịa n'oge alfa ya, bụ seramiiki oxidized kpam kpam nke nwere ụdị corundum nwere usoro nwere ihe dị nso na hexagonal, na-enye nkwụsi ike thermal dị ịrịba ama, kemịkalụ inertness, na ike n'ibu na okpomọkụ dị elu.
Alumina dị oke ọcha (nkịtị 95– 99.9% Al ₂ O isii) a na-ahọrọ maka ngwa nozzles n'ihi ọdịnaya mmetọ ya dị oke, nke na-ebelata oke oke ọka na-ebelata ma na-eme ka nguzogide okpomọkụ na mmebi kemịkal dịkwuo mma.
Ihe microstructure, gụnyere mma, ọka equiaxed, A na-emezi ya n'oge sintering iji belata porosity ma jiri ọkpụrụkpụ kacha mma, na-emetụta kpọmkwem nguzogide mbuze nke nozzle na iguzosi ike n'ezi ihe n'okpuru mmiri mmiri na-agba ọsọ..
A na-ewepụtakarị ihe ndị dị ka MgO n'ụdị mkpokọta iji gbochie mmepe ọka na-adịghị ahụkebe n'oge mgbụsị akwụkwọ., ime ka ụfọdụ microstructure otu nke na-akwado iguzosi ike n'ezi ihe na-adịgide adịgide.
1.2 Ngwongwo igwe na ihe ọkụ dị mkpa maka arụmọrụ Nozzle
Alumina ceramics na-egosi ike siri ike Vickers na-agabiga 1800 HV, na-eme ka ha na-eguzogide ọgwụ siri ike site na mmiri mmiri juru, àgwà dị mkpa na ngwa dị ka ájá ájá na ịcha mmiri mmiri na-adịghị mma.
Site na ume mgbanwe nke 300– 500 MPa na mkpakọ ike karịrị 2 GPA, alumina nozzles na-echekwa nchekwa akụkụ n'okpuru usoro nrụgide dị elu, na-esitekarị na 100 ka 400 MPa na sistemụ mmepụta ihe.
Igwe ọkụ, alumina na-ejigide ya n'ibu ụlọ dị ukwuu dị ka 1600 Celsius C, ya na ọnụọgụ mgbasawanye ọkụ belatara (~ 8 × 10 ⁻ / K) nke na-enye nguzogide dị ịrịba ama maka ujo thermal– dị mkpa ma ọ bụrụ na etinyere ya na mgbanwe okpomọkụ ngwa ngwa n'oge mmalite mmalite ma ọ bụ nkwụsị nkwụsị.
Ya thermal conductivity (~ 30 W/m · K) ezuola ikpochapụ okpomọkụ mpaghara na-emeghị ka mkpọda okpomọkụ nke nwere ike iduga kewara, stabilizing mkpuchi na ọkụ nchịkwa chọrọ.
2. Usoro nrụpụta yana izi ezi geometric
2.1 Ụzọ ịkpụzi na ịmegharị ihe maka imepụta Nozzle
Mmepụta nke alumina seramiiki nozzles na-amalite site na ntụ ntụ alumina dị elu, nke a nụchara anụcha ziri ezi n'ime a akwụkwọ ndụ akwụkwọ ndụ ahụ na-eme ka ojiji nke ụzọ ndị dị otú ahụ dị jụụ isostatic ịpị (CIP), injection ịkpụzi, ma ọ bụ extrusion, dabere n'ụdị geometry achọrọ na nha setịpụrụ.
( Alumina seramiiki nozzles)
Mpịakọta isostatic oyi na-eji nrụgide otu sitere na ntuziaka niile, na-ekesa otu njupụta njupụta dị mkpa maka ibelata ntụpọ n'oge sintering.
A na-eji ịkpụzi injection maka ụdị nozzles dị mgbagwoju anya nwere tapers dị n'ime yana nnukwu orifices, na-enyere elu akụkụ ziri ezi na reproducibility na uka mmepụta.
Mgbe ịkpụzi, akwụkwọ ndụ akwụkwọ ndụ compacts na-eme usoro ọgwụgwọ okpomọkụ nke okpukpu abụọ: debinding ikpochapụ organic binders na sintering na okpomọkụ n'etiti 1500 Celsius C na 1650 Celsius C iji nweta ọkpụrụkpụ usoro ihe dị nso site na mgbasa nke steeti siri ike.
Kpọmkwem njikwa gburugburu sintering na ọnụ ahịa kpo oku / oyi dị mkpa iji chebe megide ịgbagọ, na-agbaji, ma ọ bụ ịkpakọba ọka nke nwere ike itinye arụmọrụ nozzle n'ihe egwu.
2.2 Ịrụ igwe, Sprucing Up, na njikwa mma
Post-sintering, alumina nozzles na-achọkarị machining ziri ezi iji nweta ihe mgbochi siri ike, karịsịa na mpaghara orifice ebe njirimara mgbaba na-enwe mmetụta kachasị maka njedebe elu na geometry.
A na-eji egweri diamond na ịsa ahụ mee ka ebe dị n'ime na mpụga dị mma, na-enweta ụkpụrụ ịdị nhịahụ elu nke edepụtara n'okpuru 0.1 µm, nke na-ebelata nguzogide mgbasa ma na-ezere mkpokọta ntakịrị.
The orifice, na-adịkarị iche site na 0.3 ka 3.0 mm n'ogo, ga-adị na-enweghị micro-cracks na chamfers iji jide n'aka na mgbasa ozi laminar na usoro ịgbasa mgbe niile.
Ụzọ nnwale na-adịghị emebi emebi dị ka microscopy anya, Nyocha X-ray, na a na-eji ule ịnya igwe nrụgide iji chọpụta nkwụsi ike ụlọ na ịdị n'otu n'ọrụ tupu ebuga ya.
Geometries emebere nke ọma, nke mejupụtara convergent-divergent (sitere na Laval) profaịlụ maka mgbasa ozi supersonic ma ọ bụ ụdị oghere dị iche iche maka usoro ịgba ndị na-eso ụzọ, a na-emepụta nke ọma site na iji ngwá ọrụ ọhụrụ na nhazi kọmputa na-enyere aka (CAD)-chụpụrụ mmepụta.
3. Uru bara uru karịa Ngwa Nozzle ọzọ
3.1 Mgbasa Kasị Elu na Nguzogide Nrụrụ Aka
Atụnyere ọla (eg, tungsten carbide, igwe anaghị agba nchara) ma ọ bụ polymer nozzles, alumina na-egosipụta nguzogide dị ukwuu karịa iyi abrasive, karịsịa na gburugburu ebe gụnyere silica ájá, garnet, ma ọ bụ dị iche iche ndị ọzọ siri ike abrasives tinye n'ọrụ na elu nkwadebe na ịcha.
Ọkpụkpụ ígwè na-akawanye njọ ngwa ngwa n'ihi micro-fracturing na nrụrụ plastik, chọrọ nnọchi mgbe niile, ebe alumina nozzles nwere ike ịdịru 3– 5 ugboro ka ukwuu, na-ebelata oge nkwụsịtụ na ọnụ ahịa arụ ọrụ.
Na mgbakwunye, alumina enweghị ike ịbanye n'ọtụtụ acid, antacid, na ihe mgbaze, na-eme ka ọ dị mma maka nsị kemịkal, etching, na usoro nchacha ebe ihe igwe ga-agba nchara ma ọ bụ bute mmiri mmiri ahụ.
Nchekwa kemịkalụ a dị mkpa kpọmkwem na nrụpụta semiconductor, nhazi ọgwụ, na ngwa-ọkwa nri chọrọ ịdị ọcha dị elu.
3.2 Ihe mkpuchi ọkụ na ọkụ eletrik
Igwe ọkụ eletrik dị elu nke alumina (> 10 ¹⁴ Ω · centimeters) na-eme ka ọ dị mma maka ojiji na usoro mkpuchi mkpuchi electrostatic, ebe ọ na-ezere ihichapụ ọnụ ma na-ekwe nkwa atomization agba.
Ike mkpuchi ọkụ ya na-enye ohere ka usoro nchekwa dị n'ime ikuku ikuku na-ekpo ọkụ, dị ka ịgbasa ọkụ ma ọ bụ ikpocha ọkụ, na-enweghị okpomọkụ na-ebufe ihe ndị dị n'ókè.
N'adịghị ka ígwè, alumina anaghị eme ka mmeghachi omume yinye na-adịghị mma na iyi mmiri na-anabata, na-echekwa iguzosi ike n'ezi ihe nke ngwọta dị nro.
4. Ngwa ụlọ ọrụ mmepụta ihe na mmetụta nka nka
4.1 Ọrụ na Abrasive Jet Machining na Surface Ọgwụgwọ
Alumina seramiiki nozzles dị mkpa na sistemu mgbawa siri ike maka iwepụ corrosion, agba wepụ, na elu ebe texturing na akpaaka, ikuku ikuku, na ngalaba ụlọ.
Ikike ha idowe dayameta orifice oge niile karịa iji ogologo oge na-eme ka ọnụ ọgụgụ dị ike na akụkụ mmetụta na-agbanwe agbanwe, ozugbo mmetụta n'elu ebe imecha top àgwà na usoro repeatability.
Na abrasive waterjet mbepụ, tubes na-etinye uche na alumina na-eduga ngwakọta mmiri na-eme ka mmiri dị elu, na-ejide ike megide ike abrasive nke ga-emebi ngwa ngwa ngwa ngwa ngwa ngwa ngwa ngwa.
4.2 Jiri n'ime mmepụta ihe mgbakwunye, Mgbasa mkpuchi, na njikwa mmiri mmiri
Na thermal ịgba usoro, dị ka plasma na ire ọkụ, alumina nozzles na-eduzi ikuku ikuku na-ekpo ọkụ na ihe ndị gbazere n'ime ihe., inweta site na ha thermal ujo iguzogide na akụkụ nche.
A na-ejikwa ha n'ọrụ n'ụzọ ziri ezi na-efesa nozzles maka kemịkalụ ugbo, sistemụ inkjet, na gas atomization, ebe iyi nguzogide na-eme ka ngwa ngwa dị ogologo oge.
Na mbipụta 3D, karịsịa na njigide jetting na extrusion ngwaahịa, alumina nozzles na-enye nnukwu ntụ ntụ ma ọ bụ tapawa viscous nwere obere mgbochi ma ọ bụ eyi.
Ngwa na-apụta nwere sistemu microfluidic yana ngwaọrụ ụlọ nyocha na-a-chip, ebe akụkụ alumina miniaturized na-eji sturdiness na biocompatibility.
Na nchịkọta, alumina seramiiki nozzles na-eguzo maka ụzọ ụzọ dị mkpa nke sayensị ihe na injinia ụlọ ọrụ.
Ngwakọta nkwụsi ike ha pụtara ìhè, thermal nche, na nguzogide kemịkalụ na-eme ka o kwe omume ịrụ ọrụ ntụkwasị obi na ole na ole n'ime ntọala njikwa mmiri na-achọsi ike.
Ka usoro azụmahịa na-aga n'ihu na nrụgide ka ukwuu, kacha mma resistances, na ogologo oge ngwọta, seramiiki alumina na-aga n'ihu na-edobe ụkpụrụ maka ike, ihe nleba anya nke ọma nke ọma.
5. Onye na-ere ahịa
Ụlọ ọrụ Alumina Technology Co., Ltd., Ltd gbadoro anya na nyocha na mmepe, mmepụta na ire nke aluminom oxide ntụ ntụ, aluminum oxide ngwaahịa, aluminum oxide crucible, wdg., na-eje ozi na ngwá electronic, ceramik, chemical na ụlọ ọrụ ndị ọzọ. Kemgbe e guzobere ya na 2005, ụlọ ọrụ ahụ etinyela aka n'inye ndị ahịa ngwaahịa na ọrụ kacha mma. Ọ bụrụ na ị na-achọ elu mma alumina al2o3, biko nweere onwe gị ịkpọtụrụ anyị. ([email protected])
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