1. Material Basics uye Microstructural Layout
1.1 Make-up uye Crystallographic Kugadzikana kweAlumina
(Alumina Ceramic Nozzles)
Alumina (Al ₂ O TWO), kunyanya muchikamu chayo che alpha, ndeye ceramic yakazara oxidized ine corundum-mhando yehexagonal yakavharwa-yakazara chimiro, kupa kunoshamisa kugadzikana kwekupisa, makemikari inertness, uye mechanical stamina pa tembiricha yakasimudzwa.
High-kuchena alumina (kazhinji 95– 99.9% Al ₂ O MATANHU) inofarirwa kushandiswa kwenozzle nekuda kwekusvibisa kwayo mukati, iyo inoderedza muganho wezviyo kupera simba uye inovandudza kuramba kwekupisa uye kuderera kwemakemikari.
Iyo microstructure, kusanganisira zvakanaka, equiaxed grains, inogadzirwa panguva yekupisa kuderedza porosity uye kushandisa zvakanyanya ukobvu, inokanganisa zvakananga kunyura kwemupumburu uye kutendeseka kwechimiro pasi pehupamhi hwekuyerera kwemvura.
Ingredients senge MgO zvinowanzo kuratidzwa mukuteedzera yakazara kusvika kuvharisa kusajairika kukura kwezviyo panguva yese yekuisa., kugadzira imwe yunifomu microstructure inotsigira kusingaperi kuvimbika.
1.2 Mechanical uye Thermal Properties Inoenderana neNozzle Kubudirira
Alumina ceramics inoratidza Vickers kusimba kunodarika 1800 HV, zvichiita kuti dzisanyanya kusakara kubva kumvura inotakura zvinhu, hunhu hwakakosha mumashandisirwo akadai sejecha uye zvisingafadzi waterjet kucheka.
Iine flexural stamina ye300– 500 MPa uye kuomesa kusimba pamusoro 2 GPa, alumina nozzles inochengetedza dimensional chengetedzo pasi peyakanyanya-kudzvanywa maitiro, kazhinji kubva 100 ku 400 MPa mumaindasitiri masisitimu.
Thermally, alumina inochengetedza zvivakwa zvayo zvemichina zvakanyanya 1600 °C, ine kuderedzwa kwemafuta ekuwedzera coefficient (~ 8 × 10 ⁻⁶/ K) iyo inopa kumisa kupikisa kune thermal shock– yakakosha kana ichiiswa kune nekukurumidza kusiyanisa kwekushisa mukati mekutanga kana kudzima.
Its thermal conductivity (~ 30 W/m · K) inokwana kubvisa kupisa kwenzvimbo pasina kukonzera kupisa kwemateru kunogona kukonzera kupatsanurwa, kudzikamisa insulation uye inodziya kutonga zvinoda.
2. Maitiro ekugadzira uye Geometric Accuracy
2.1 Kuumba uye Sintering Nzira dzeNozzle Kugadzira
Kugadzirwa kwealumina ceramic nozzles kunotanga nepamusoro-kuchena alumina poda, iyo inonatswa mukati memuviri wakasvibira uchiita kushandisa nzira dzakadai sekutonhorera isostatic kudzvanya (CIP), jekiseni kuumba, kana extrusion, zvinoenderana neinodiwa geometry uye set dimension.
( Alumina Ceramic Nozzles)
Cold isostatic kudzvanya inoshandisa yunifomu kushushikana kubva kune ese mirairo, kugadzira yunifomu density kutenderera kwakakosha pakudzikisa kuremara panguva yekupisa.
Jekiseni molding inoshandiswa kune yakaoma nozzle maumbirwo ane emukati matepi uye hombe orifices, kugonesa kurongeka kwepamusoro uye kuberekana mukugadzirwa kwakawanda.
Mushure mekugadzira, ma compacts akasvibira anoita maviri-nhanho kupisa kwekurapa: debinding kubvisa organic binders uye sintering pane tembiricha pakati 1500 °C uye 1650 ° C kuwana padhuze-theoretical ukobvu kuburikidza yakasimba-nyika diffusion.
Kudzora chaiko kwenzvimbo yekupisa uye mitengo yekudziya / yekutonhora kwakakosha kudzivirira kubva pakukotama, kutyora, kana kukoromoka kwezviyo izvo zvinogona kukanganisa kushanda kwenozzle.
2.2 Machining, Sprucing Up, uye Quality Control
Post-sintering, alumina nozzles kazhinji inoda kurongeka machining kuti iwane kupikisa kwakasimba, kunyanya munzvimbo ye orifice umo mafambiro anoyerera anonyanya kutarisisa kumusoro kwenzvimbo kupera uye geometry.
Kukuya nekuwacha madhaimani kunoshandiswa kukwenenzvera mukati nekunze kwenzvimbo, kuwana roughness values dzakanyorwa pazasi 0.1 µm, iyo inoderedza kuramba kutenderera uye inodzivirira kuunganidza zvishoma.
The orifice, zvinowanzosiyana kubva 0.3 ku 3.0 mm muhukuru, anofanira kuva pasina micro-kutsemuka uye chamfers kuti nechokwadi laminar kutenderera uye nguva dzose pfapfaidzo mapatani.
Nzira dzisiri dzekuparadza dzekuyedza senge optical microscopy, X-ray kuongorora, uye bvunzo dzekumanikidza bhasikoro dzinoshandiswa kuratidza kugadzikana kwekuvaka uye kufanana kwekuita kusati kwatumirwa..
Ma geometries akagadzirwa, inosanganisira convergent-divergent (kubva kuLaval) profiles for supersonic circulation kana multi-hole marudzi evateveri spray mapatani, zvinogadzirwa zvakanyanya uchishandisa hunyanzvi hwekushandisa uye dhizaini yekombuta (CAD)-kugadzirwa kunofambiswa.
3. Mabhenefiti Anoshanda Pamusoro peAlternative Nozzle Materials
3.1 Superior Disintegration uye Corrosion Resistance
Yakafananidzwa nesimbi (e.g., tungsten carbide, simbi isina ngura) kana polymer nozzles, alumina inoratidza kuramba kwakanyanya kune abrasive kupfeka, kunyanya munzvimbo dzinosanganisira silica sand, garnet, kana mamwe akasiyana-siyana akaoma abrasives anoshandiswa mukugadzira pamusoro uye kucheka.
Metal nozzles inodzikira nekukurumidza nekuda kwe micro-fracturing uye plastic deformation, ichida chinotsiva nguva dzose, nepo alumina nozzles inogona kugara 3– 5 nguva refu, zvinoshamisa kuderedza nguva uye mitengo inoshanda.
Pamusoro pe, alumina inert kune akawanda acids, antacid, uye zvinonyungudutsa, kuita kuti ive yakakodzera kupfapfaidza kwemakemikari, etching, uye nzira dzekuchenesa apo zvinhu zvesimbi zvaizoita ngura kana kukanganisa mvura.
Iyi kuchengetedzwa kwemakemikari inonyanya kukosha mukugadzira semiconductor, kugadzirwa kwemishonga, uye zvikumbiro zvegiredhi rekudya zvinoda kuchena kwepamusoro.
3.2 Thermal uye Magetsi Insulation Properties
Alumina yakakwirira yemagetsi resistivity (> 10 ¹⁴ Ω · masendimita) inoita kuti ive yakakodzera kushandiswa mu electrostatic spray covering systems, uko inodzivirira kudonha kwemutengo uye inovimbisa yunifomu pendi atomization.
Kugona kwayo kupisa kwekudzivirira kunobvumira nzira yakachengeteka munzvimbo yekupisa yekupisa, zvakadai sekuputika kwemoto kana kuchenesa kupisa, pasina kupisa kuendeswa kune zvakaganhurwa zvinhu.
Kusiyana nesimbi, alumina haikonzerese zvisingadiwe ketani kuita muhova dzinopindura dzemvura, kuchengetedza kuvimbika kwezvigadziriso zvisina kusimba.
4. Industrial Applications uye Technical Effect
4.1 Mabasa muAbrasive Jet Machining uye Surface Treatment
Alumina ceramic nozzles akakosha mune rough blasting masisitimu ekubvisa ngura, pendi kubvisa, uye pamusoro penzvimbo yekutumira mameseji mune auto, aerospace, uye zvikamu zvekuvaka.
Kugona kwavo kuchengetedza dhayamita yenguva dzose pamusoro pekushandiswa kwakawedzerwa kunoita kuti kuve nechokwadi kuenderana hutsinye chiyero uye kona yekukanganisa, kupesvedzera zvakananga pamusoro penzvimbo kupedzisa mhando yepamusoro uye maitiro ekudzokorora.
Mune abrasive waterjet yekucheka, alumina concentrating tubes inotungamira iyo yakakwira-kumanikidza mvura-abrasive musanganiswa, kurwisana nemasimba anokuvadza anozokurumidza kukanganisa zvigadzirwa zvakapfava.
4.2 Shandisa muAdditive Manufacturing, Spray Coating, uye Fluid Control
In thermal spray systems, zvakadai seplasma uye kupisa kwemoto, alumina nozzles yakanangana nepamusoro-tembiricha gasi inoyerera uye zvimedu zvakanyungudutswa pane substrates, kuwana kubva mukupisa kwavo kwekuvhunduka uye kuchengetedzwa kwedimensional.
Ivo zvakare vanoshandirwa mukunyatso kupfapfaidza nozzles yekurima makemikari, inkjet systems, uye gasi atomization, uko kupfeka kuramba kunovimbisa kunogara kwenguva refu kwekushandisa chaiko.
Mu 3D kudhinda, kunyanya mune binder jetting uye chigadzirwa extrusion, alumina nozzles inopa hupfu hombe kana viscous paste ine kuvharika kushoma kana kupfeka.
Zvishandiso zviri kubuda zvinosanganisira microfluidic masisitimu uye lab-on-a-chip zvishandiso, uko miniaturized alumina zvikamu zvinoshandisa kusimba uye biocompatibility.
Mukudzokorora, alumina ceramic nozzles inomiririra yakakosha mharadzano yezvinhu zvesainzi uye engineering yeindasitiri.
Musanganiswa wavo wakatanhamara wekusimba, thermal security, uye kupikisa kwemakemikari kunoita kuti zvikwanisike kushanda kwakavimbika mune zvishoma zvezvinonyanya kudiwa zvekugadzirisa mvura.
Sezvo nzira dzekutengeserana dzinosundira kune kushushikana kukuru, kupikisa kwakanaka, uye nguva yakareba yemhinduro, alumina ceramics ramba uchiisa chiyero chekusimba, high-precision flow control components.
5. Vendor
Nhoroondo ye Alumina Technology Co., Ltd inotarisa pakutsvaga nekusimudzira, kugadzirwa uye kutengesa kwealuminium oxide poda, aluminium oxide zvigadzirwa, aluminium oxide crucible, etc., kushandira zvemagetsi, Ceramics, makemikari nemamwe maindasitiri. Kubva pakugadzwa kwayo mu 2005, kambani yakazvipira kupa vatengi zvigadzirwa zvakanakisa uye masevhisi. Kana uri kutsvaga zvemhando yepamusoro alumina al2o3, ndapota inzwa wakasununguka kutibata nesu. ([email protected])
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