Cov khoom siv raw ntawm silica dub feem ntau suav nrog wollastonite, opal, halloysite, olivine, serpentine, kaolin, tawv kaolin, coal gangue thiab ya tshauv. cov
Muaj ob txoj hauv kev tseem ceeb rau kev npaj silica: txoj kev nag lossis daus thiab roj theem txoj kev. Txoj kev nag lossis daus yog chemically extract silica hmoov. Cov kauj ruam tshwj xeeb muaj xws li reacting quartz xuab zeb nrog dej qab zib tshauv ntawm qhov kub thiab txias los tsim cov iav dej, tom qab ntawd ntxiv cov kua qaub rau precipitate silica, thiab tom qab ntawd ntxuav, lim, ziab, crushing, thiab lwm yam. Cov khoom tsim los ntawm craftsmanship. Cov roj theem txoj kev siv tshuaj vapor deposition txoj kev, siv silicon tetrachloride, oxygen thiab hydrogen kom hnov mob ntawm qhov kub thiab txias los tsim cov silica zoo heev, uas tau ua tiav los ntawm kev sib sau, sib cais thiab deacidification kom tau txais cov khoom tiav. Lub ntsiab sib txawv ntawm ob txoj kev yog particle loj thiab purity. Fumed silica feem ntau yog nanometer-loj thiab siab dua hauv purity, thaum precipitated silica yog micron-loj thiab qis dua hauv purity.
Dawb carbon dub yog dav siv thiab feem ntau yog siv hauv kev lag luam roj hmab los ua tus neeg sawv cev txhawb zog, tshwj xeeb tshaj yog nyob rau hauv kev tsim cov khoom siv roj hmab dawb, xim thiab lub teeb xim. Tsis tas li ntawd, silica kuj tseem siv rau hauv cov ntaub ntawv rwb thaiv tsev, lubricants thiab lwm yam kev lag luam vim nws cov hluav taws xob rwb thaiv tsev zoo thiab lub zog txhua yam.