Copper foil, qhov no zoo li yooj yim ultra-nyias daim ntawv ntawm tooj liab, muaj cov txheej txheem tsim khoom siv thiab ua haujlwm nyuaj. Cov txheej txheem no feem ntau suav nrog kev rho tawm thiab kho cov tooj liab, kev tsim cov ntawv ci tooj liab, thiab cov kauj ruam tom qab ua tiav.
Thawj kauj ruam yog qhov extraction thiab refining tooj liab. Raws li cov ntaub ntawv los ntawm Tebchaws Meskas Geological Survey (USGS), lub ntiaj teb kev tsim cov tooj liab tau mus txog 20 lab tons hauv 2021 (USGS, 2021). Tom qab kev rho tawm ntawm tooj liab ore, los ntawm cov kauj ruam xws li crushing, sib tsoo, thiab flotation, tooj liab mloog zoo nrog txog 30% tooj liab cov ntsiab lus tuaj yeem tau. Cov tooj liab no tau txais cov txheej txheem refining, suav nrog smelting, converter refining, thiab electrolysis, thaum kawg yielding electrolytic tooj liab nrog ib tug purity siab li 99.99%.
Tom ntej no los txog kev tsim cov ntawv ci tooj liab, uas tuaj yeem muab faib ua ob hom nyob ntawm txoj kev tsim khoom: electrolytic copper foil thiab dov tooj liab ntawv ci.
Electrolytic tooj liab ntawv ci yog tsim los ntawm cov txheej txheem electrolytic. Nyob rau hauv ib tug electrolytic cell, tooj liab anode maj dissolves nyob rau hauv qhov kev txiav txim ntawm lub electrolyte, thiab tooj liab ions, uas tau tsav los ntawm lub tam sim no, txav mus rau lub cathode thiab tsim tooj liab deposits ntawm lub cathode nto. Lub thickness ntawm electrolytic tooj liab ntawv ci feem ntau yog li ntawm 5 txog 200 micrometers, uas tuaj yeem tswj tau raws li qhov xav tau ntawm cov ntawv luam tawm Circuit Board (PCB) technology (Yu, 1988).
Rolled tooj liab ntawv ci, ntawm qhov tod tes, yog ua mechanically. Pib los ntawm ib daim ntawv tooj liab ob peb millimeters tuab, nws yog maj mam thinned los ntawm dov, nws thiaj li ua tau tooj liab ntawv ci nrog ib tug tuab ntawm lub micrometer (Coombs Jr., 2007). Hom ntawv ci tooj liab no muaj qhov smoother dua li electrolytic copper foil, tab sis nws cov txheej txheem tsim khoom siv ntau zog.
Tom qab cov ntawv ci tooj liab tau tsim, nws feem ntau yuav tsum tau ua tom qab ua tiav, suav nrog annealing, kho deg, thiab lwm yam, txhawm rau txhim kho nws cov kev ua tau zoo. Piv txwv li, annealing tuaj yeem txhim kho qhov ductility thiab toughness ntawm tooj liab ntawv ci, thaum kho nto (xws li oxidation los yog txheej) tuaj yeem txhim kho corrosion kuj thiab adhesion ntawm tooj liab ntawv ci.
Hauv cov ntsiab lus, txawm hais tias kev tsim thiab tsim cov txheej txheem ntawm cov ntawv ci tooj liab yog qhov nyuaj, cov khoom tsim tawm muaj kev cuam tshuam loj heev rau peb lub neej niaj hnub no. Qhov no yog ib qho kev tshwm sim ntawm kev kawm txuj ci, hloov cov peev txheej ntuj rau hauv cov khoom siv thev naus laus zis los ntawm cov txheej txheem tsim khoom.
Txawm li cas los xij, cov txheej txheem ntawm kev tsim cov ntawv ci tooj liab kuj coj qee qhov teeb meem, suav nrog kev siv hluav taws xob, kev cuam tshuam ib puag ncig, thiab lwm yam. Raws li daim ntawv tshaj tawm, kev tsim cov 1 tuj tooj liab yuav tsum muaj txog 220GJ ntawm lub zog, thiab tsim 2.2 tons ntawm carbon dioxide emissions (Northey. et al., 2014). Yog li ntawd, peb yuav tsum nrhiav tau ntau npaum li cas thiab ib puag ncig tus phooj ywg txoj kev los tsim tooj liab ntawv ci.
Ib qho kev daws teeb meem yog siv tooj liab rov ua dua los tsim cov ntawv ci tooj liab. Nws tau tshaj tawm tias kev siv hluav taws xob ntawm kev tsim cov tooj liab rov qab tsuas yog 20% ntawm cov tooj liab thawj, thiab nws txo qis kev siv tooj liab ore peev (UNEP, 2011). Tsis tas li ntawd, nrog rau kev nce qib ntawm cov thev naus laus zis, peb tuaj yeem txhim kho kev siv hluav taws xob ntau dua thiab txuag hluav taws xob tooj liab foil tsim cov txuj ci, ntxiv kom txo lawv cov kev cuam tshuam ib puag ncig.
Hauv kev xaus, kev tsim khoom thiab kev tsim khoom ntawm cov ntawv ci tooj liab yog ib qho kev ua haujlwm uas muaj kev sib tw thiab cov cib fim. Txawm hais tias peb tau ua tiav qhov tseem ceeb, tseem muaj ntau txoj haujlwm yuav tsum tau ua kom ntseeg tau tias daim ntawv tooj liab tuaj yeem ua tau raws li peb cov kev xav tau niaj hnub thaum tiv thaiv peb ib puag ncig.
Lub sij hawm xa tuaj: Plaub Hlis-08-2023