Cov pa roj carbon dub dawb (silica dioxide) raug muab faib ua fumed (vapor-phase) thiab precipitated (kua-phase), txhua tus muaj cov yam ntxwv sib txawv thiab cov ntaub ntawv siv.

Fumed Silica

Fumed silica, tsim los ntawm kev kub siab hydrolysis ntawm chlorosilanes hauv cov nplaim hydrogen-oxygen, muaj qhov huv ≥99.8%, nanoscale thawj cov khoom me me (7–40 nm), thiab thaj chaw tshwj xeeb heev (100–400 m²/g). Nws tsim cov tes hauj lwm thixotropic muaj zog, muab kev txhawb nqa zoo, kev ruaj khov thermal, thiab kev rwb thaiv hluav taws xob. Zoo tagnrho rau cov ntawv thov siab, nws ua haujlwm ua tus neeg sawv cev tseem ceeb hauv cov roj hmab silicone, tus hloov pauv rheology hauv cov txheej / nplaum kom tiv thaiv kev sagging, thiab cov khoom siv tseem ceeb hauv cov tshuaj pleev ib ce, cov khoom siv hluav taws xob encapsulants, thiab cov khoom siv roj teeb.

Precipitated Silica

Cov silica uas tau ua los ntawm kev ua kom cov sodium silicate tsis muaj zog nrog cov kua qaub (piv txwv li, H₂SO₄) ua raws li kev ua kom nag thiab ziab, muaj qhov huv si nyob ib puag ncig 93%, cov khoom loj dua (micron scale), thiab thaj chaw tshwj xeeb nruab nrab (100–200 m²/g). Tus nqi tsim nyog thiab yooj yim rau kev ua tiav, nws zoo tshaj plaws hauv cov xwm txheej uas muaj kev cuam tshuam nrog tus nqi. Nws yog siv dav ua cov khoom siv txhawb nqa hauv cov log tsheb (txo kev tiv thaiv dov) thiab cov khoom siv roj hmab, tus neeg sawv cev matting hauv cov xim, tus neeg sawv cev sib txhuam hauv cov tshuaj txhuam hniav, thiab tus neeg nqa khoom / tiv thaiv kev sib sau ua ke hauv cov khoom noj thiab cov khoom noj pub mis.

Tsab xov xwm no muab ib qho kev piav qhia meej kom pab koj xaiv cov silica zoo tshaj plaws rau koj cov haujlwm.