Cov khoom siv kho qhov muag yog cov ntsiab lus tseem ceeb ntawm cov tshuab optoelectronic niaj hnub xws li laser tshuab, kev sib txuas lus kho qhov muag, thiab cov khoom siv duab. Raws li cov tshuab kho qhov muag txuas ntxiv mus txuas ntxiv mus rau qhov me me, kev sib koom ua ke, thiab ultra- siab precision, qhov yuav tsum tau ua kom raug thiab qhov zoo ntawm cov khoom siv kho qhov muag tau dhau los ua nruj dua. Polishing thev naus laus zis tab tom ntsib cov teeb meem loj: xoob abrasive polishing raug kev txom nyem los ntawm kev ua haujlwm qis, cov khib nyiab tseem ceeb, cov nqi kho slurry siab, thiab ib puag ncig muaj kuab paug, thaum cov cuab yeej abrasive ruaj tsis tuaj yeem ua tau zoo rau qhov chaw nkhaus. Tawm tsam qhov keeb kwm yav dhau los no, cov cuab yeej polishing tshiab tau tshwm sim, sib txuas cov kev yooj yim ntawm xoob abrasive polishing nrog kev ua haujlwm ntawm kev txhim kho abrasive polishing. Los ntawm qhov kev ua tshwj xeeb ntawm cov ntaub soluble binder, nws ua tiav nws tus kheej-ntxhiab ntawm polishing nto, ua haujlwm tau zoo ntawm cov ntsiab lus ntawm cov txheej txheem polishing ib txwm muaj thiab qhia dav dav daim ntawv thov kev cia siab hauv optical polishing. Hauv qab no, peb pib los ntawm lub hauv paus ntsiab lus ntawm soluble tus kheej -sharpening polishing zaj duab xis thiab coj koj los ntawm cov thev naus laus zis no.
Lub hauv paus ntsiab lus thiab cov yam ntxwv ntawm Soluble Self-Ntxhiab Polishing Zaj duab xis
Tus kheej soluble-sharpening polishing zaj duab xis siv cov khoom siv soluble raws li cov binder rau cov nplej abrasive, faib cov khoom sib txawv ntawm qhov ntau thiab tsawg hauv cov qauv tshwj xeeb mus rau cov yeeb yaj kiab elastic substrate. Qee cov khoom lag luam kuj tseem muaj cov txheej txheem dual- txheej txheej nrog cov txheej txheem abrasive thiab sub- txheej abrasive. Thaum lub sij hawm polishing, thaum cov abrasives ntawm cov zaj duab xis nto ua 钝化 (passivated / npub) vim kev sib txhuam, cov kuab tshuaj aqueous hauv polishing slurry dissolves cov soluble binder nyob ib ncig ntawm passivated abrasives, txo cov binder tuav lub zog thiab tso cai rau passivated abrasives mus detach thiab disperse rau hauv slurry. Nyob rau tib lub sijhawm, cov abrasives tshiab uas tsis koom nrog hauv polishing raug nthuav tawm los ntawm cov yeeb yaj kiab, ua tiav tsis siv neeg rov ua dua tshiab ntawm abrasives thiab ua kom cov txheej txheem txuas ntxiv, ruaj khov, thiab ua haujlwm zoo.
Muab piv rau cov cuab yeej polishing ib txwm muaj, tus kheej soluble -sharpening polishing zaj duab xis ua tau raws li cov kev ua haujlwm siab ntawm ultra-cov khoom siv kho qhov muag thiab nthuav tawm cov txiaj ntsig tshwj xeeb hauv kev polishing:
High Polishing Precision: Cov yeeb yaj kiab ua rau muaj kev tswj hwm tus kheej thiab tus kheej- rov ua dua tshiab ntawm cov abrasives, zam qhov khawb ntawm qhov chaw, qhov pits, thiab lwm yam tsis xws luag los ntawm kev sib txawv ntawm cov xoob abrasives, kom ntseeg tau qhov sib xws thiab kev ntseeg siab ntawm cov khoom siv kho qhov muag hauv kev ua batch. Tsis tas li ntawd, cov abrasives mos tuaj yeem raug xaiv kom txo qis cov tuab ntawm cov txheej puas ntawm cov khoom ua haujlwm, ua tau raws li qhov yuav tsum tau ua kom zoo ntawm lub tshuab laser thiab siab - cov cuab yeej ntsuas qhov tseeb.
Adaptability rau Complex Surfaces: Cov zaj duab xis muaj zoo elasticity thiab saj zawg zog, tso cai rau nws ua raws li nyob rau hauv lub optical workpieces nrog tej curvatures. Qhov no daws tau qhov teeb meem zoo uas cov tsoos abrasives tsis tuaj yeem hloov mus rau qhov tsis yog -planar optical Cheebtsam, ua raws li cov kev xav tau ntawm cov tshuab kho qhov muag me me thiab kev sib xyaw ua ke.
Ntsuab thiab Efficient: Thaum lub sij hawm polishing, lub soluble binder yog yaj los ntawm cov uas tsis yog - tshuaj lom aqueous kuab tshuaj los yog ethanol - cov dej tov, ua tsis muaj kev puas tsuaj pov tseg. Muab piv rau xoob abrasive polishing, nws txo qis abrasive pov tseg thiab slurry cov nqi kho mob, ua tiav kev ua haujlwm zoo ib puag ncig. Lub caij no, tus kheej -ntxhiab tshuab tshem tawm qhov xav tau ntawm cov cuab yeej hloov pauv lossis hnav khaub ncaws, txhim kho kev ua haujlwm zoo heev.
Kev Npaj Soluble Tus Kheej -Ntxhiab Polishing Zaj duab xis
Tus yuam sij rau cov soluble tsau soft-abrasive polishing zaj duab xis yog nyob rau hauv kev xaiv ntawm abrasives thiab binders. Kev npaj yog nqa tawm ntawm lub tshuab me me - nplai txheej, qhov sib xyaw ntawm cov abrasives thiab binder yog coated mus rau lub pretreated substrate uas tau primed, ua raws li los ntawm ziab los ua cov zaj duab xis.
1. Kev xaiv cov khoom siv
(1) Binder: Txhawm rau kom ntseeg tau tias cov binder dissolves me ntsis hauv polishing slurry thaum tsis txhob muaj kev sib cais ntau dhau uas yuav cuam tshuam kev ruaj ntseg polishing, lub binder system feem ntau siv cov khoom tsis sib xws (xws li, epoxy resin) ua lub hauv paus binder, nrog rau qhov sib ntxiv ntawm li 5% soluble resins xws li polyvinyl resin, polyethylene oxide, polyethylene oxide, polyvinyl cawv, polyethylene oxide. urea-formaldehyde resin, los yog esterified starch. Cov no ua raws li qhov pore- ua tus neeg sawv cev. Thaum lub binder tiv tauj cov aqueous polishing slurry, nws maj mam yaj, txo qhov chaw tuav lub zog tuav ntawm cov abrasives thiab ua rau gradual abrasive detachment.
(2) Kev Xaiv Abrasive: Cov ntaub ntawv mos xws li SiO₂ thiab CeO₂ feem ntau yog siv los ua abrasives hauv optical polishing. Rau qhov loj me, ib qho kev sib xyaw bimodal - qhov loj me yog qhov zoo dua: cov khoom me me tsis yog tsuas yog koom nrog polishing tab sis kuj tseem ua cov fillers los txhawb cov khoom loj, txo cov resin binder cov ntsiab lus hauv zaj duab xis. Qhov no zoo tiv thaiv kev tawg thiab tev ntawm zaj duab xis nto los ntawm kev hloov pauv ntawm lub cev (piv txwv li, shrinkage) ntawm cov ntaub qhwv cov ntaub ntawv uas tshwm sim hauv cov pa polishing films.
(3) Substrate Xaiv thiab Kev Kho Mob: Cov substrate feem ntau rau soluble tsau soft-abrasive polishing films suav nrog PET zaj duab xis thiab PC zaj duab xis. Tsis kho PET zaj duab xis shrinks ntawm qee qhov kev ua haujlwm kub; kom tsis txhob tawg, PET zaj duab xis yuav tsum tau cua sov- teeb. Ntxiv mus, vim lub siab symmetry ntawm PET molecular qauv thiab nws cov crystalline orientation muaj peev xwm, feem ntau coatings tsis ua raws li zoo rau nws nto, ua ncaj qha txau los yog txheej nyuaj. Txhawm rau txhim kho qhov adhesion, zaj duab xis yuav tsum tau kho plasma nto thiab kho corona, ua raws li daim ntawv thov ntawm primer uas muaj cov pab pawg ua haujlwm xws li -COOH, -SO₃H, -POH, -NHC=O, -C=O, {12}O, -OH, los yog -SH. Cov pab pawg no nkag siab zoo nrog cov pawg polar (piv txwv li, hydroxyl, ester bonds) hauv PET molecules, txhim kho kev sib raug zoo ntawm lub zog.
2. Txheej txheem tswj
(1) Txheej: Lub zog ntawm daim ntawv cog lus thiab polishing kev ua tau zoo ntawm cov txheej txheej abrasive feem ntau yog hloov kho los ntawm kev sib txawv ntawm cov khoom sib txawv ntawm cov khoom sib xyaw rau cov khoom sib xyaw. Feem ntau, ntau dua abrasive solids cov ntsiab lus ua rau ntau dua polishing efficiency tab sis qis zog zog. Tsis tas li ntawd, txheej txheej uniformity thiab thickness tswj yog qhov tseem ceeb, ncaj qha cuam tshuam rau stability thiab kev pab lub neej ntawm txheej. Thaum cov abrasives thiab resin tsis sib npaug los yog cov txheej txheem tsis sib xws, npuas, qhov pores, thiab lwm yam tsis muaj zog tuaj yeem tsim hauv txheej. Cov pob no dhau los ua qhov chaw pib tawg: nyob rau hauv kev ntxhov siab sab nraud, macroscopic cracks tsim, propagate los ntawm cov cheeb tsam tsis muaj zog, thiab deflect, nws thiaj li ua rau txheej tawg thiab detachment. Kev tswj ntawm txheej txheej yog qhov tseem ceeb: qhov ntau dua ntawm txheej txheej, qhov me me ntawm qhov sib txawv ntawm qhov sib txawv, thiab cov kuab tshuaj ntau dua nyob rau lub sijhawm gelation, ncua sijhawm kho. Raws li kev kho lub sij hawm nce, kev ntxhov siab sab hauv hauv txheej txheej nce, kuj yooj yim ua rau tawg. Yog li ntawd, kom tsis txhob tawg thiab tawg, ntau txheej txheej yuav tsum tau ua haujlwm thaum tsim cov yeeb yaj kiab kom ntseeg tau tias txheej txheej zoo.
(2) Kev ziab khaub ncaws: kub ziab kom qhuav sai dua cov kuab tshuaj diffusion hauv txheej txheej, tab sis kuj ua kom cov tshuaj tiv thaiv kab mob, ua kom lub sijhawm gel thiab txhawb kev tawg. Txhawm rau hais txog qhov no, cov txheej txheem cua sov gradient tuaj yeem siv los txo cov evaporation tus nqi ntawm cov gel, yog li txo qhov nro saum npoo ntawm cov khoom -kua interface thiab txhim kho kev ua haujlwm zoo. Txo cov txheej txheej ib qho dhau los kuj tau txais txiaj ntsig.