Tawm tsam keeb kwm yav dhau los ntawm kev rov ua haujlwm sai ntawm cov ntaub ntawv xov xwm hluav taws xob rau kev lag luam me me, siab - kev ua haujlwm zaus, thiab kev ntseeg siab, silicon micro- hmoov, raws li lub hauv paus tseem ceeb ntawm cov khoom siv tshiab txhawb kev txhim kho siab -kawg hluav taws xob, ntsib kev ua haujlwm tsis tu ncua. Raws li kev ua tiav cov txheej txheem crushed silicon micro- cov hmoov nplej, vim lawv cov morphology tsis tu ncua, raug kev txom nyem los ntawm cov khoom tsis zoo xws li cov hmoov tsis zoo, tsis muaj ntim ntim, thiab cov khoom siv kev ntxhov siab. Thaum siv rau cov khoom siv hluav taws xob encapsulation, cov teeb meem no yooj yim ua rau cov txheej txheem tawg, tsis txaus flatness, thiab hloov pauv hauv cov khoom siv hluav taws xob, ua rau lawv tsis haum rau qhov tseeb thiab siab - kev xav tau ntawm cov khoom siv hluav taws xob siab heev. Yog li ntawd, kev hloov kho spheronization tau tshwm sim raws li qhov tseem ceeb ntawm kev txhim kho cov silicon micro- hmoov kev lag luam los ntawm qis- kawg, kev ua ntxhib mus rau siab - kawg, zoo tshiab - khoom siv.
Tam sim no, lub ntsiab spheronization technologies rau silicon micro- hmoov nyob rau hauv kev ua lag luam feem ntau muaj xws li mechanical shaping, nplaim fusion, ncaj combustion/VMC txoj kev, plasma spheronization, thiab tshuaj synthesis txoj kev:
01 Mechanical Shaping Method
Cov txheej txheem kho tshuab shaping yog cov txheej txheem hloov kho lub cev yooj yim tshaj plaws, vam khom feem ntau ntawm kev siab -kev nrawm nrawm, cuam tshuam, thiab kev sib tsoo / sib dhos. Nws siv cov cuab yeej tshwj xeeb shaping xws li siab- nrawm cuam tshuam mills thiab xov xwm- stirred mills los siv cov tshuab ua haujlwm tas mus li rau crushed silicon micro- hmoov, nce qib ntse npoo thiab cov ces kaum los txhim kho particle ncig thiab kho qhov tsis xws luag. Nws kuj ua rau nyuaj agglomerates, txhim kho tej qhov ntom ntom thiab ntws.
Qhov zoo ntawm cov txheej txheem kev kho tshuab yog nyob rau hauv nws tus nqi qis, kev siv tag nrho ntawm cov peev txheej uas twb muaj lawm, txheej txheem yooj yim, ib puag ncig tus phooj ywg, thiab kev lag luam scalability. Txawm li cas los xij, tus kheej kheej particle piv, kais ntom ntom, thiab ua tiav cov txiaj ntsig ntawm cov hmoov nplej tsis tuaj yeem lav tau zoo, ua rau nws tsuas yog siv rau cov hmoov sib xyaw ua ke nrog cov kev xav tau qis dua.
02 Nplaim Fusion Method
Txoj kev nplaim hluav taws fusion tam sim no yog txoj hauv kev thev naus laus zis rau kev lag luam ntawm spherical silica hmoov nyob rau hauv Suav teb, uas muaj cov cuab yeej siv tau zoo, tus nqi qis tag nrho, muaj peev xwm loj, thiab tsim nyog rau cov khoom loj - teev tas mus li. Tshwj xeeb, angular silica hmoov yog siv los ua cov khoom siv raw, uas dhau mus ua ntej - cov kauj ruam kho xws li dav hlau milling, multi-theem sieving, thiab purification. Tom qab ntawd cov hmoov nplej uas tsim nyog tau muab tso rau hauv qhov kub siab - qhov kub thiab txias, qhov twg cov khoom tawg sai sai thiab cog lus rau hauv cov duab kheej kheej hauv qab qhov nro, ua raws li qhov txias txias thiab khov kho.
Cov cua kub hauv txoj kev nplaim hluav taws feem ntau yog siv cov pa huv si xws li acetylene lossis natural gas, yielding nplaim taws tsis muaj paug. Txawm li cas los xij, qhov txiaj ntsig spheronization tau cuam tshuam los ntawm cov khoom lag luam suav nrog cov khoom siv raw khoom me me, nplaim taws kub, lub sijhawm nyob, thiab kev ruaj ntseg noj. Kev tswj cov txheej txheem tsis raug tuaj yeem ua rau muaj teeb meem xws li particle agglomeration, hollow spheres, broadening particle size distribution, insufficient spheronization conformance, and low spheronization rates for ultrafine and submicron hmoov.
03 Plasma Spheronization Method
Txoj kev plasma spheronization yog cov txheej txheem uas siv lub siab -lub zog ntawm plasma rau kev ua cov khoom siv. Nws lub hauv paus ntsiab lus suav nrog kev tso silicon micro- hmoov uas tau dhau los ua ultra- kev sib tsoo zoo thiab cov tshuaj tsis huv tshem tawm mus rau hauv lub plasma reactor. Cov hmoov yog melted sai sai nyob rau hauv qhov siab - qhov kub thiab txias cheeb tsam ntawm lub plasma torch, ces tsim spherical droplets nyob rau hauv lub nro nto, thiab solidifies mus rau hauv spherical hais tom qab sai txias. Piv nrog rau txoj kev nplaim hluav taws fusion, plasma spheronization nta lub sijhawm luv luv ntawm kev kub siab -, uas zoo tiv thaiv crystalline theem hloov ntawm silica. Ntxiv mus, vim nws cov qib siab ntawm automation thiab kev ruaj ntseg zoo, nws ua kom cov nqi ntau dua spheronization, superior particle loj uniformity, thiab tsis tshua muaj impurity cov ntsiab lus.
Txawm li cas los xij, txoj kev no tseem ntsib cov teeb meem tseem ceeb hauv kev lag luam -scale saws. Ua ntej, thermal plasma feem ntau yog cua sov los ntawm hluav taws xob, thiab muaj kev poob ntau thaum lub sij hawm hloov hluav taws xob hluav taws xob rau hauv cov ntshav, ua rau kev siv hluav taws xob tsawg thiab yog li cov nqi cua sov siab. Thib ob, lub zog ntawm induction thermal plasma generators yog txwv los ntawm cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob siab - yog tus nqi, nrog rau kev nqis peev ntau, uas txwv tsis pub siv kev lag luam. Tsis tas li ntawd, cov cuab yeej tseem ceeb xws li plasma spheronization furnaces tseem monopolized los ntawm cov tuam txhab Japanese thiab German. Tus nqi pib nqis peev siab kuj tseem yog qhov tseem ceeb uas txwv tsis pub nws daim ntawv thov loj -.
04 Direct Combustion/VMC Method
Txoj kev combustion ncaj qha (tseem hu ua VMC txoj kev) yog thawj zaug tsim los ntawm Nyiv lub Admatechs thiab raug suav tias yog cov txheej txheem kev sib tw classic hauv ntiaj teb siab -kawg semiconductor ntim teb. Txoj kev no siv siab -purity metallic silicon hmoov ua raw khoom. Lub ultrafine metallic silicon hmoov yog uniformly dispersed nyob rau hauv ib tug oxygen kwj mus rau ib tug tswj deflagration tshuaj tiv thaiv, tsim silica. Nyob rau tib lub sijhawm, qhov instantaneous ultra- cov tshuaj tiv thaiv kub tso tawm los ntawm silicon oxidation ua rau cov silica generated yaj thiab vaporize tam sim ntawd, ces re-puab nyob rau hauv nto nro thiab sai txias thiab solidify, tsim amorphous spherical silica hais nyob rau hauv situ. Thoob plaws hauv cov txheej txheem, kev tswj xyuas meej ntawm cov pa oxygen concentration, qhov kub thiab txias, thiab kev khiav nrawm ua rau muaj kev tswj xyuas zoo ntawm qhov loj me thiab morphology.
Piv nrog rau lwm txoj kev siv lub cev, VMC txoj kev kov yeej cov kev txwv impurity ntawm ntuj quartz ore raw cov ntaub ntawv. Los ntawm kev sib txuas los ntawm siab -purity metallic silicon, cov khoom ua tiav cov ntsiab lus tsis tshua muaj hlau impurity, tsis muaj residual crystalline theem, zoo heev dielectric zog, nqaim particle loj tis, zoo heev monodispersity, thiab tsis tshua muaj siab particle roundness. Nws cov khoom sib xws nyob deb dhau ntawm cov txheej txheem nplaim taws. Cov khoom siv feem ntau yog siv nyob rau hauv siab - nqi- ntxiv cov xwm txheej xws li siab -kawg semiconductor ntim thiab siab - cov khoom siv hluav taws xob ntau zaus. Txawm li cas los xij, vim tias cov tshuaj tiv thaiv deflagration ntawm cov hlau silicon hmoov xav tau cov cuab yeej siv siab heev sealing thiab parameter tswj qhov system precision, cov cuab yeej siv thiab cov nqi kho mob yog qhov tseem ceeb, kev tswj xyuas kev nyab xeeb yog qhov nyuaj tshwj xeeb, kev tsim khoom muaj siab, thiab kev lag luam kev lag luam muaj zog - kav ntev - lub sij hawm los ntawm Nyiv lub Admatechs.
05 Tshuaj Synthesis Method
Cov txheej txheem tshuaj synthesis feem ntau suav nrog sol-gel, roj-theem synthesis, microemulsion cov tshuaj tiv thaiv, nag lossis daus / noob loj hlob, thiab lwm yam. Qhov txawv ntawm kev tshaj tawm -kev kho mob shaping logic ntawm lub cev hloov kho, txheej txheem no siv silane precursors, siab -purity silicates, thiab lwm yam, raws li raw cov ntaub ntawv. Los ntawm kev tswj silicon qhov chaw hydrolysis, condensation, nucleation, thiab particle loj hlob txheej txheem, spherical silica hais yog synthesized ncaj qha nyob rau hauv situ nyob rau theem molecular, tsis muaj kev vam khom rau crushed quartz hmoov feedstocks. Cov khoom yog cov purity siab heev thiab muaj peev xwm ntau dua nyob rau hauv cov nqe lus ntawm zoo particle loj, nqaim loj faib, thiab cov qauv tsim.
Siv cov txheej txheem classic sol-gel txoj kev ua piv txwv, nws siv Stöber system, siv tetraethyl orthosilicate (TEOS) ua silicon qhov chaw hauv ib qho yooj yim (xws li ammonia) catalytic ethanol-dej tov hnyav system rau hydrolysis thiab condensation tshua. TEOS thawj zaug hydrolyzes los tsim silanol monomers, uas dhau los ua kom lub cev qhuav dej los ua silica (SiO₂) oligomers, nws thiaj li loj hlob ntawm nuclei los tsim monodisperse silica microspheres. Rau kev npaj ntawm loj dua - txoj kab uas hla spherical hais, cov noob loj hlob thiab los nag txoj kev uas txwv cov nucleation theem nrab thiab txhawb kev loj hlob ntawm epitaxial ntawm cov khoom uas twb muaj lawm tuaj yeem siv tau.