Daim ntawv graphite yog daim ntawv tshwj xeeb uas ua los ntawm graphite ua cov khoom siv raw. Thaum graphite nyuam qhuav raug khawb tawm hauv av, nws zoo li cov nplai, thiab nws mos thiab hu ua graphite ntuj. Daim graphite no yuav tsum tau ua thiab ua kom zoo kom siv tau. Ua ntej, muab cov graphite ntuj tso rau hauv cov kua qaub sulfuric thiab cov kua qaub nitric rau ib ntus, tom qab ntawd coj nws tawm, yaug nrog dej, ziab nws, thiab tom qab ntawd muab tso rau hauv lub cub tawg kub rau hlawv. Tus kws kho graphite Furuite hauv qab no qhia txog cov kev cai ua ntej rau kev tsim cov ntawv graphite:
Vim tias cov inlays ntawm cov graphites ua pa sai sai tom qab raug cua sov, thiab tib lub sijhawm, qhov ntim ntawm graphite sai sai nthuav dav los ntawm kaum lossis txawm tias ntau pua npaug, yog li ib hom graphite dav tau txais, uas hu ua "expanded graphite". Muaj ntau qhov (seem tshuav tom qab cov inlays raug tshem tawm) hauv cov graphite nthuav dav, uas txo qhov ceev ntawm graphite, uas yog 0.01-0.059 / cm3, lub teeb hauv qhov hnyav thiab zoo heev hauv kev rwb thaiv tsev kub. Vim tias muaj ntau qhov, ntau qhov loj me, thiab tsis sib xws, lawv tuaj yeem sib tshuam nrog ib leeg thaum siv lub zog sab nraud. Qhov no yog qhov kev nplaum tus kheej ntawm cov graphite nthuav dav. Raws li qhov kev nplaum tus kheej ntawm cov graphite nthuav dav, nws tuaj yeem ua tiav rau hauv daim ntawv graphite.
Yog li ntawd, qhov yuav tsum tau ua ua ntej rau kev tsim cov ntawv graphite yog kom muaj cov khoom siv tiav, uas yog, ib lub cuab yeej rau kev npaj cov graphite nthuav dav los ntawm kev immersion, ntxuav, hlawv, thiab lwm yam, uas muaj dej thiab hluav taws. Nws yog qhov tseem ceeb heev; qhov thib ob yog lub tshuab ua ntawv thiab nias lub menyuam. Lub siab linear ntawm lub menyuam nias yuav tsum tsis txhob siab dhau, txwv tsis pub nws yuav cuam tshuam rau qhov sib npaug thiab lub zog ntawm daim ntawv graphite, thiab yog tias lub siab linear me dhau, nws tsis tsim nyog dua. Yog li ntawd, cov txheej txheem tsim yuav tsum raug, thiab daim ntawv graphite ntshai ntawm cov dej noo, thiab daim ntawv tiav yuav tsum tau ntim rau hauv cov ntim khoom tsis muaj dej noo thiab khaws cia kom zoo.
Lub sijhawm tshaj tawm: Cuaj hlis-23-2022