Yuav ua li cas npaj nano dawb carbon dub nrog micro silicon hmoov?
Oct 24, 2024Tso lus
Yuav ua li cas npaj nano dawb carbon dub nrog micro silicon hmoov?
1. Acid leaching thiab purification ntawm micro-silicon hmoov
Tom qab cov hmoov micro-silica tau kho los ntawm hydrochloric acid ntuj sedimentation txoj kev, nws tau ntxuav nrog 1: 200 dilute hydrofluoric acid rau 5min thiaj li yuav tshem tawm cov wrapping phenomenon ntawm glassy silica, thiab ces ob-kauj ruam pickling txheej txheem ntawm hydrochloric acid. thiab sulfuric acid tau ua tiav, kom lub purity ntawm silica hauv micro-silica hmoov tuaj yeem ncav cuag 98.3%.
Lub iav silica ntawm cov hmoov tsuas tuaj yeem yaj los ntawm hydrofluoric acid, tab sis cov txheej txheem no kuj ua rau cov silica poob, thiab tsis tuaj yeem txhim kho cov ntsiab lus ntawm silica zoo, yog li cov hmoov micro-silica tuaj yeem ntxiv nrog calcium oxide. , tom qab kub kub calcination los tsim calcium silicate, thiab tom qab ntawd los ntawm cov kua qaub leaching kom yaj cov dawb carbon dub khoom nrog ib tug purity ntawm 99.9%. Cov txheej txheem no tuaj yeem tsis tsuas yog txo cov txheej txheem cov tshuaj tiv thaiv, tab sis kuj tshem tawm cov kev tiv thaiv ntawm iav lub xeev ntawm cov hmoov micro-silica. Qhov sib ntxiv ntawm calcium oxide rhuav tshem cov qauv ternary uas tsim los ntawm silicon, hlau thiab lwm yam hlau hauv cov hmoov, uas ua rau cov hlau thiab lwm yam hlau impurities yooj yim yaj los ntawm hydrochloric acid thiab txhim kho cov impurity tshem tawm tus nqi hauv cov kua qaub leaching txheej txheem.
2. Kub alkali dissolves silicon dioxide nyob rau hauv micro-silicon hmoov
Tsuas yog cov txheej txheem acid leaching yog siv los tshem tawm cov hlau impurities hauv cov hmoov kom ua tiav lub hom phiaj ntawm silica purification. Vim tias qee qhov impurities yog coated los ntawm glassy silica, nws nyuaj rau kev sib cuag thiab hnov mob nrog cov kua qaub, yog li nws tsis tuaj yeem ua tau raws li qhov xav tau ntawm purity ntawm dawb carbon dub. Rau lub hom phiaj no, silica tuaj yeem muab rho tawm los ntawm micro-silicon hmoov thiab tom qab ntawd gelled los ua cov khoom siv purity silica.
Yog li ntawd, cov kws tshawb fawb tau tsim cov txheej txheem uas sodium hydroxide dissolves sodium silicate tov npaj los ntawm micro-silicon hmoov ua silicon qhov chaw, carbonized nws los ntawm carbon dioxide pov tseg roj, thiab npaj high-purity, nplua-grained dawb carbon dub khoom. Cov txheej txheem no tsis tsuas yog ua rau cov khib nyiab tag nrho siv, txo cov pa phem ntawm tsev cog khoom gases rau ib puag ncig, tab sis kuj coj tau qee yam txiaj ntsig rau cov lag luam, thiab txhawb kev txhim kho kev ua haujlwm ntawm ib puag ncig cov pa phem.
3. Hydrofluoric acid dissolves silicon dioxide hauv micro-silicon hmoov
Tom qab cov hlau impurities raug tshem tawm los ntawm hydrochloric acid acid leaching, cov nag lossis daus tau txhaj rau hauv hydrofluoric acid tov kom yaj nws, thiab H: SiF sol tau npaj. Tom qab ntawd, cov tshuaj npaj tau muab ntxiv rau hauv cov tshuaj ammonia doped nrog PEG6000 nyob rau hauv cov xwm txheej ntawm 60 degree rau neutralization thiab hydrolysis, thiab high-purity hydrated silica precipitate tau npaj, thiab nano silica hmoov tau los ntawm ziab thiab hlawv. Cov txheej txheem no zoo ib yam li cov txheej txheem ntawm purifying silica tom qab alkali dissolution nrog acid, thiab nws lub ntsiab kom zoo dua yog hydrofluoric acid tuaj yeem yaj cov iav silica rau saum npoo ntawm micro-silica hmoov, thaum lye tsis tuaj yeem.
