Qhov txawv ntawmprecipitated silicathiab fumed silica
Rau cov xim dawb carbon dub, qhov tseem ceeb tshaj plaws yog nws cov "txhim kho" nyhuv. Yog tias nws yog siv rau qhov kub-kub sealing nplhaib ntawm lub foob pob hluav taws, lub siab kub thiab kua muag kuj yuav muab ob npaug rau; Yas steel qhov rooj thiab qhov rais seals feem ntau siv hauv tsev kho kom zoo nkauj yuav ua siab ntev nrog nws "sib koom"; Nws tuaj yeem txo qhov dov tsis kam ntawm lub log tsheb thiab txhim kho nws cov dej skid tsis kam.
Muaj ob yam tseem ceeb ntawmsilica, Dab tsi yog qhov txawv ntawm precipitated silica?
Kev faib tawm | Precipitated silica | Fumed silica |
Txoj kev tsim khoom thiab cov khoom siv raw | Sodium silicate thiab sulfuric acid feem ntau yog siv, thiab cov tshuaj tiv thaiv yog nqa tawm nyob rau hauv cov kua-kua theem. | Silicon tetrachloride, hydrogen thiab oxygen feem ntau yog siv rau qhov kub thiab txias combustion cov tshuaj tiv thaiv nyob rau theem roj-khoom. |
Main technical indicators, As | Cov ntsiab lus 98 feem pua , cov ntsiab lus dej 4-8 feem pua , ignition poob Tsawg dua lossis sib npaug li 7 feem pua , thaj chaw tshwj xeeb 100-200m2 / g, pH tus nqi 5-8. | Purity saum toj no 99.8 feem pua thiab cov ntsiab lus dej tsawg dua 1 feem pua (siv hu ua anhydrous silica). |
Nqi thiab siv | Tus nqi raw khoom yog tsawg thiab cov txheej txheem ntau lawm yog yooj yim los tswj. Nws yog dav siv hauv roj hmab, log tsheb, khau ua, tshuaj txhuam hniav, pub, pleev xim thiab lwm yam lag luam. | Kev nqis peev hauv kev tiv thaiv ib puag ncig yog qhov loj thiab cov txheej txheem kev npaj yog complex. Cov khoom siv tsuas yog siv hauv RTV, HTV silica gel khoom, toner, xim thiab lwm yam lag luam. |
Nqe | Cov khoom yog pheej yig | Tus nqi khoom yog siab |
Nqe kev txhim kho | Cov khoom lag luam muaj txiaj ntsig zoo ntawm tus nqi, suav txog ntau dua 90 feem pua hauv kev lag luam hauv tsev. | Daim ntawv thov teb yog txawv los ntawm precipitated silica, nrog ib feem ntawm tsawg tshaj li 10 feem pua. |