Daim ntawv thov silicon dioxide
Silicon dioxide yog siv los ua cov iav, iav khoom, nrum xuab zeb, iav fiber, ceramic glaze, xuab zeb blasting for antirust, lim xuab zeb, flux, refractory thiab sib tsoo. Silicon dioxide yog dav siv ntau yam khoom tsim tawm. Tsis tshua muaj nplaim hluavtaws siv tau los tsim cov khoom tseem ceeb hauv kev lag luam, cov twj paj nruag thiab cov khoom siv tes ua. Silica yog ib qho tseem ceeb raw khoom rau kev siv ua khoom ntawm qhov muag fibers. Feem ntau ntshiab quartz tuaj yeem siv los ua cov iav quartz. Lub coefficient ntawm nthuav ntawm quartz iav yog heev me me. Nws yog sib npaug rau 1/18 ntawm cov iav zoo tib yam. Nws tuaj yeem tiv thaiv qhov hloov ntawm qhov kub thiab txias, thiab acid acid tsis zoo (tshwj tsis yog HF). Yog li ntawd, lub khob quartz feem ntau yog siv los ua cov xim kub uas tiv thaiv tshuaj lom neeg. Quartz xuab zeb feem ntau siv los ua cov khoom siv iav thiab khoom siv hauv tsev.
Silicon dioxide yog ib qho tseem ceeb rau kev siv ntawm iav, quartz iav, dej iav, optical fiber, qhov tseem ceeb ntawm kev lag luam hauv tshuab hluav taws xob, kho twj paj nruag, khoom siv tes ua thiab cov ntaub ntawv refractory.
Thaum silicon dioxide Crystal yog zoo meej, nws yog siv lead ua; cov SiO2 yog gelatinized tom qab lub cev qhuav dej yog agate; cov silica gel ua opal; thaum lub noob ntawm silica tsawg dua li ob peb lub microns, nws muaj chalcedony, flint, thiab theem nrab quartzite. Cov ntxhuav cov khoom siv tau ruaj khov rau hauv lub cev thiab cov khoom siv tshuaj, thiab cov nplais muaj cov oxide minerals ntawm peb lub koog ua kev, uas yog tsis tshua muaj quartz (alpha quartz), uas yog cov hluav taws xob tshaj plaws hauv cov quartz ntxhia. Cov tshuaj quartz kuj muaj xws li kub quartz (beta quartz). Quartz thaiv, kuj hu ua silica, mas siv los ua quartz xuab zeb, tseem hu ua silica xuab zeb , thiab tseem yog cov khoom raw ntawm quartz refractory thiab ferrosilicon.
Cov khoom noj khoom haus yog siv los ua anticoagulant, defoamer, thickener, filter aid thiab clarifier. Tuam Tshoj tus "Hygienic standard for the use of food additives" (GB2760-2011) txhais tias nws yuav siv tau rau cov qe hmoov, hmoov qab zib, mis hmoov, cocoa hmoov, cocoa butter, cog hmoov, instant kas fes, kua zaub hmoov thiab nyob rau. Siv siab tshaj plaws yog 15g / kg, hmoov essence, qhov siab tshaj plaws siv nyiaj yog 80g / kg; tus nqi siab tshaj plaws yog 0.2 g / kg; lis, 1.2 G / kg