Koj puas paub ntau yam ntawmsilica
Raws li peb txhua tus paub, cov ntsiab lus ntawm silicon nyob rau hauv lub ntiaj teb crust yog hais txog 26 feem pua, thib ob tsuas yog oxygen. Daim ntawv uas twb muaj lawm ntawm silicon keeb nyob rau hauv cov xwm yog feem ntau silicon dioxide. Silicon dioxide nyob rau hauv lub ntiaj teb crust feem ntau muaj nyob rau hauv silicon dioxide crystals. Txawm hais tias cov mis molecular ntawm silicon dioxide yog SiO2, tsis muaj ib qho molecule ntawm silicon dioxide nyob rau hauv silicon dioxide crystals, tab sis suav tsis tau silicon atoms thiab oxygen atoms txuas nrog ib leeg los ntawm silicon oxygen bonds los tsim ib tug peb-dimensional qauv. Quartz, siv lead ua, agate thiab lwm yam minerals paub zoo yog silica crystals.
Vim tias cov qauv siv lead ua silica ruaj khov, ntau cov silica siv lead ua hmoov yuav raug tsim nyob rau hauv cov txheej txheem ntawm cov mining. Yog tias nqus tau los ntawm tib neeg lub cev, cov hmoov no yuav tso rau hauv lub ntsws thiab tsis tuaj yeem tawm mus. Nyob rau tib lub sijhawm, lawv yuav tsim qhov peb feem ntau hu ua "silicosis" lossis "silicosis". Txawm li cas los xij, silica uas tsim los ntawm peb lub tuam txhab belongs rau hluavtaws nano silica, uas tsis muaj cov qauv siv lead ua. Macroscopically hais lus, nws yog ib qho sib xyaw ntawm nano silica molecules, uas yog soluble hauv dej thiab tuaj yeem nqus tau los ntawm tib neeg lub cev thiab tshem tawm nrog cov ntshav ncig. Nws yuav tsis ua rau silicosis vim yog deposition. Txawm hais tias fumed silica yog amorphous silica, non-toxic thiab harmless, nws yog ib hom hmoov tom qab tag nrho. Yog tias qhov concentration hauv huab cua siab dhau lawm, nws tseem yuav ua rau qee qhov tsis xis nyob hauv tib neeg txoj kev ua pa. Yog li ntawd, cov kev tiv thaiv zoo sib xws yuav tsum tau ua thaum tsim khoom thiab ua haujlwm.
Lub synthesis ntawm nano-loj fumed silica yog npaj los ntawm tshuaj lom neeg cov tshuaj tiv thaiv. Tam sim no, muaj ob hom kev nag lossis daus thiab roj theem txoj kev. Muaj cov txheej txheem sol-gel hauv chav kuaj. Tsuas yog ob txoj hauv kev los nag thiab roj theem npaj tau tham ntawm no. Cov txheej txheem synthesis ntawm nano silica los ntawm txoj kev nag lossis daus yog feem ntau cov silica aggregate tsim los ntawm cov tshuaj tiv thaiv ntawm cov iav dej (sodium silicate) tov nrog sulfuric acid thiab hydrochloric acid ntawm ib qho pH. Fumed silica feem ntau yog amorphous nano silica npaj los ntawm high-temperature hydrolysis ntawm silicon chloride nyob rau hauv oxyhydrogen nplaim. Cov nano silica ua los ntawm ob txoj kev muaj qhov sib txawv heev.
Los ntawm cov tsos, vim hais tias cov dej ntsiab lus ntawm fumed silica yog ntau qis dua li ntawmprecipitated silica, qhov fluidity ntawm fumed silica yog qhov zoo dua thiab nws yooj yim dua los tsa cov plua plav. Lub compaction ceev yog feem ntau tsuas yog 1/4 ntawm precipitated silica, thiab kuj muaj ib qho txawv ntawm qhov kev xav ntawm ob. Los ntawm qhov kev xav ntawm lub cev thiab tshuaj tsis haum, pH ntawm fumed silica yog acidic vim hais tias cov silicon hydroxyl pawg nyob rau saum npoo yog ionized nyob rau hauv cov tshuaj, thaum lub precipitated silica feem ntau nruab nrab vim hais tias ntawm nws cov txheej txheem npaj thiab ib tug loj tus naj npawb ntawm hydroxyl pawg. ; Lub purity ntawm fumed silica tuaj yeem ncav cuag ntau dua 99 feem pua, thaum lub purity ntawm precipitated silica feem ntau ntawm 90 feem pua - 95 feem pua ; Fumed silica feem ntau yog nanometer, thaum precipitated silica feem ntau yog micron (nanometer).
Hais txog tus nqi, cov txheej txheem nag lossis daus muaj keeb kwm ntev kev loj hlob, cov txheej txheem paub tab, tus nqi qis thiab cov zis siab, yog li tus nqi qis. Thaum cov roj-theem silica pib lig, nrog cov khoom siv siab, kev nqis peev siab thiab cov zis qis, yog li tus nqi siab dua li cov roj-theem silica. Nyob rau hauv cov nqe lus ntawm daim ntawv thov teb, precipitated silica yog tsuas yog siv los ua tus neeg sawv cev thiab muab tub lim roj hmab thiab yas, thiab yog dav siv nyob rau hauv log tsheb, shoemaking, tshuaj txhuam hniav, txheej thiab lwm yam teb. Vim nws cov qauv tshwj xeeb, aerosilica feem ntau yog siv los ua rheological additives, matting agents thiab anti sedimentation agents of coatings and paints, as flow additives in powder coatings, reinforcing materials of plastics, etc.
Raws li cov khoom siv nano tshiab, fumed silica muaj cov khoom sib piv nrog cov silica zoo tib yam. Nws tsis yog tsuas yog siv dav hauv thaj chaw ib txwm muaj, tab sis kuj tseem nyob hauv ntau qhov chaw siab kawg thiab cov teb tshiab. Fumed silica yuav ua rau muaj txiaj ntsig zoo rau kev tsim kho kev lag luam yav tom ntej.
JINSHA PRECIPITATED SILICA MANUFACTURING CO.LTD.
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