Lub cev lub cev
Silica, los yog cov kua silica, tshuaj formula SiO 2. Muaj ob hom crystalline thiab amorphous silica nyob rau hauv cov xwm txheej. Crystalline silica vim cov qauv siv lead ua sib txawv, muab faib ua quartz, tridymite thiab cristobalite peb. Ntshiab quartz yog xim tsis muaj kob, loj thiab pob tshab quaj hu ua Crystal. Yog hais tias lub siv lead ua muaj ib txoj kab ntawm impurities nrog sib txawv xim, amethyst, Cha Jing thiab thiaj li. Ordinary xuab zeb yog cov me me quartz muaju, daj xuab zeb (ntau hlau impurities) thiab dawb xuab zeb (tsawg impurities, ntau ntshiab).
Hauv qhov silica Crystal, plaub qhov tswm sim electrons ntawm silicon atom form plaub cov kabmob cog nrog plaub qhov atoms oxygen, cov silicon atom nyob rau nruab nrab ntawm ib txwm tetrahedron, cov plaub leeg oxygen nyob ntawm plaub vertexes ntawm ib txwm tetrahedron, cov SiO₂ Yog qhov nyuaj tshaj plaws ntawm kev sib txuam, tsuas yog qhov sib piv ntawm tus naj npawb ntawm atoms ntawm silicon thiab oxygen nyob rau hauv lub silica Crystal. Silica yog ib qho atomic siv lead ua.
Natural diatomite yog amorphous silica, yog qhov seem ntawm qis dej yug diatoms, dawb khoom los yog hmoov, ntxeem tau, lub teeb, mos khoom, muaj zog adsorption, tsis muaj nyob hauv dej.
Tshuaj lom neeg
Tshuaj lom neeg kuj ruaj khov. Tsis txhob hnov dej. Yog ib qho acidic oxide, tsis nrog cov tshuaj tiv thaiv kab mob. Gaseous fluoride fluoride reacts nrog silica rau gaseous silicon tetrafluoride. Reacts nrog cov kub, concentrated alkali los yog cov hauv paus uas tsim cov silicates thiab dej. Nrog ntau hom hlau oxides ntawm kev kub ceev los ua kom muaj silicate. Rau lub chaw ua khoom ntawm quartz iav, optical seev cev, tshuaj lom neeg lub thawv, cov iav zoo nkauj, cov khoom hluav taws xob, qhov muag fibers, ceramics. Silica tsis nquag plias. Nws tsis cuam tshuam nrog cov tshuaj fluoride uas tsis yog fluorine, halogens uas tsis yog hydrogen fluoride, hydrogen halides thiab sulfuric acid, nitric acid thiab perchloric acid (tsis suav cov xim phosphoric acid tshwj xeeb)
KISHO iav Txheej yog polysiloxane ua cov khoom loj, txhua qhov siv lead ua plated yog li ntawm ntau ntau hom polysiloxane science thiab tsim nyog nrog nws cov ntsiab lus silicon tuaj yeem mus txog 80-95%.