Kufambira Mberi Kutsva Mukugadzirwa kweHigh-Purity α-Al2O3: Budiriro muSainzi Yezvinhu

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Mukufambira mberi kukuru mune zvesainzi yezvinhu, vaongorori vakaita nhanho mukugadzirwa kwe-α-Al2O3 (alpha-alumina) yakachena zvakanyanya, chinhu chinozivikanwa nehunhu hwayo hwakasiyana uye mashandisirwo akasiyana-siyana. Izvi zvinouya mushure mezvakataurwa kare naAmrute et al. mumushumo wavo wa2019, uyo wakataura kuti hapana nzira dziripo dzinogona kugadzira α-Al2O3 ine kuchena kwakanyanya uye nzvimbo dzepamusoro dzinopfuura mwero wakati. Zvavakawana zvakakonzera kushushikana pamusoro pemiganho yehunyanzvi hwekugadzira huripo uye zvazvinoreva kumaindasitiri anovimba nechinhu ichi chakakosha.

Alpha-alumina imhando yealuminium oxide inokosheswa zvikuru nekuda kwekuoma kwayo, kugadzikana kwekupisa, uye hunhu hwemagetsi hwekuputira. Inoshandiswa zvakanyanya mumabasa akasiyana-siyana, kusanganisira zveceramics, abrasives, uye se substrate mumidziyo yemagetsi. Kudiwa kwe α-Al2O3 yakachena zvakanyanya kwave kuri kuwedzera, kunyanya muminda yemagetsi uye zveceramics yepamusoro, uko kusvibiswa kunogona kukanganisa zvakanyanya mashandiro uye kuvimbika.

Mushumo wegore ra2019 wakaitwa naAmrute nevamwe vake wakaratidza matambudziko akatarisana nevaongorori nevagadziri mukuwana mwero wekuchena waidiwa uye hunhu hwenzvimbo yepamusoro. Vakaona kuti nzira dzechinyakare, dzakadai semaitiro e sol-gel uye kugadzirwa kwe hydrothermal, kazhinji dzaikonzera zvinhu zvisingasvike pazvinodiwa pakushandiswa kwepamusoro. Kuganhurirwa uku kwakakanganisa hunyanzvi nebudiriro mumaindasitiri akati wandei epamusoro-soro.

Zvisinei, kufambira mberi kwakaitwa munguva pfupi yapfuura kwatanga kugadzirisa matambudziko aya. Kushanda pamwe chete mukutsvaga kwakabatana nemasayendisiti kubva kumasangano akasiyana-siyana anotungamira kwakaita kuti pave nenzira itsva yekugadzira zvinhu inosanganisa matekiniki epamusoro kugadzira α-Al2O3 yakachena zvikuru nenzvimbo dziri pamusoro dzakavandudzwa zvikuru. Iyi nzira itsva inoshandisa musanganiswa wekugadzira zvinhu uchishandisa microwave uye maitiro ekudzora calcination, zvichibvumira kutonga kuri nani pamusoro pezvinhu zvirimo.

Vaongorori vakataura kuti nzira yavo haina kungowana kuchena kwakanyanya chete asiwo yakakonzera α-Al2O3 ine nzvimbo dzepamusoro dzakapfuura dzakambotaurwa mumabhuku. Kubudirira uku kune mukana wekuvhura nzira itsva dzekushandisa α-Al2O3 mukushandiswa kwakasiyana-siyana, kunyanya muchikamu chemagetsi, uko kudiwa kwezvinhu zvinoshanda zvakanyanya kuri kuramba kuchiwedzera.

Pamusoro pekushandiswa kwayo mumagetsi, α-Al2O3 ine hutsanana hwakanyanya inokoshawo mukugadzirwa kwezviumbwa zvesimbi zvemhando yepamusoro, zvinoshandiswa mumaindasitiri akasiyana-siyana, anosanganisira zvemuchadenga, zvemotokari, uye zvekurapa. Kukwanisa kugadzira α-Al2O3 ine hunhu hwakawedzerwa kunogona kutungamira mukugadzirwa kwezvinhu zvitsva zvakareruka, zvakasimba, uye zvinodzivirira kusakara kana ngura.

Zvinorehwa netsvagurudzo iyi zvinopfuura kungogadzira zvinhu chete. Kugona kugadzira α-Al2O3 yakachena kwazvo ine nzvimbo dzakagadziriswa pamusoro kunogonawo kutungamira mukufambira mberi mu catalysis uye mashandisirwo ezvakatipoteredza. Semuenzaniso, α-Al2O3 inowanzoshandiswa senzira yekutsigira mukuita kwemakemikari, uye kuwedzera hunhu hwayo kunogona kuvandudza kushanda zvakanaka uye kushanda kwemaitiro akasiyana-siyana e catalytic.

Uyezve, nzira itsva yekugadzira inogona kugadzira nzira yekutsvagisa kwakawanda mune mamwe matanho ealuminium oxide uye mashandisirwo azvo. Sezvo vaongorori vachiramba vachiongorora hunhu uye maitiro ezvinhu izvi, pane kufarira kuri kukura mukushandiswa kwazvo mukuchengetedza simba, kugadzirisa nharaunda, uye kunyangwe mukugadzira mabhatiri echizvarwa chinotevera.

Zvakawanikwa kubva mukutsvagurudza uku kwazvino zvakabudiswa mumagazini yesainzi yezvinhu, uko zvakakwezva kutariswa kubva kumasangano edzidzo nemaindasitiri. Nyanzvi dziri mumunda uyu dzakarumbidza basa iri sedanho rakakosha mukukunda zvipingamupinyi zvakaonekwa naAmrute et al. uye dzakaratidza tariro nezveramangwana rekugadzirwa kweα-Al2O3.

Sezvo kudiwa kwezvinhu zvinoshanda zvakanyanya kuri kuramba kuchikura, kugona kugadzira α-Al2O3 yakachena kwazvo ine hunhu hwakawedzerwa kuchave kwakakosha. Kubudirira uku hakungogadziri matambudziko akaratidzwa mukutsvagurudza kwakapfuura chete asiwo kunoisa nzvimbo yekuwedzera hunyanzvi mune zvesainzi yezvinhu. Kushandira pamwe pakati pevaongorori nevatori vechikamu muindasitiri kuchave kwakakosha mukushandura zvakawanikwa izvi kuita mashandisirwo anoshanda anogona kubatsira zvikamu zvakasiyana-siyana.

Mukupedzisa, kufambira mberi kwakaitwa munguva pfupi yapfuura mukugadzirwa kwe-α-Al2O3 yakachena kwazvo kunomiririra danho guru musainzi yezvinhu. Nekukunda matambudziko akaonekwa muzvidzidzo zvekare, vaongorori vakavhura mikana mitsva yekushandiswa kwezvinhu izvi zvakasiyana-siyana mumabasa akasiyana-siyana etekinoroji yepamusoro. Sezvo munda uyu uchiramba uchichinja, zviri pachena kuti ramangwana re-α-Al2O3 nezvimwe zvinobva mairi zvine vimbiso huru yekuvandudza nekuvandudza mumaindasitiri akasiyana-siyana.