Vim li cas Silica Yog Qhov Tsim Nyog rau Cov Tshuaj Txhuam Hniav Txhuam Hnav
Tshuaj txhuam hniav yog qhov tseem ceeb rau neeg siv kev tu hniav txhua hnub. Tshuaj txhuam hniav txhuam hniav yog ib qho tseem ceeb ntawm cov tshuaj txhuam hniav. Crystal tshuaj txhuam hniav series nrog silica raws li tus neeg sawv cev abrasive tsis tuaj yeem tsuas ua tiav lub qhov ncauj ua kom muaj txiaj ntsig zoo, tab sis kuj tseem coj kev zoo nkauj zoo nkauj rau cov neeg siv. Yog li, silica raws li cov tshuaj txhuam hniav txhuam hniav yog siv ntau thiab ntau hauv tshuaj txhuam hniav. Txawm li cas los xij, vim muaj ntau yam laj thawj xws li kev tsis pub qhia tawm cov cuab yeej, ob peb cov ntawv nyeem tau tshaj tawm txog cov teeb meem tseem ceeb xws li kev sib txuas ntawm silica rau tshuaj txhuam hniav.
Vim tias lub silica siv rau hauv cov tshuaj txhuam hniav txhuam, qhov loj me me ntawm cov khoom siv yuav tsum nyob nruab nrab ntawm 3-15 microns, thiab qhov kev sib kis ntau dua thiab qhov qis dua qhov pom tseeb yog qhov yuav tsum tau ua.
Qhov cuam tshuam ntawm cov tshuaj tiv thaiv yooj yim xws li sodium silicate concentration, hluavtaws kub thiab lub sijhawm laus ntawm cov khoom ntawm SiO 2 tau tshawb xyuas. Cov yam ntxwv ntawm cov khoom tsim tawm tau raug soj ntsuam los ntawm pom meej ntom, kis thiab lwm yam ntsuas tseem ceeb. Cov txiaj ntsig tau qhia tias nrog qhov txo qis ntawm sodium silicate concentration hauv cov kua hauv qab, qhov sib kis ntawm tus qauv nce, tab sis pom qhov ntom ntom poob qis raws li; qhov qis dua ntawm cov hluavtaws kub yog qhov muaj txiaj ntsig zoo rau qhov txo qis ntawm qhov pom meej thiab qhov nce ntawm qhov sib kis ntawm qhov qauv; qhov txuas ntxiv ntawm lub sijhawm laus tsis muaj kev cuam tshuam tseem ceeb rau qhov kev sib kis thiab pom meej ntom ntawm cov qauv coj los ua ke.
Thib ob, txhawm rau txhawm rau txhim kho cov transmittance ntawm cov khoom, cov hluav taws xob kuj tsis tshua muaj hluav taws xob Na2SO4 thiab NaCl tau raug xaiv los tshawb xyuas qhov cuam tshuam ntawm ob lub electrolytes thiab electrolytes ntawm ntau cov ntsiab lus ntawm cov khoom lag luam. Cov khoom siv lub cev thiab tshuaj ntawm cov khoom hluavtaws tau pom los ntawm XRD, SEM, FT-IR thiab lwm txoj kev. Cov txiaj ntsig tau pom tias lub teeb xa hluav taws xob ntawm SiO 2 sib txuas los ntawm Na 2SO4 thiab NaCl ntawm qhov sib xyaw ntawm 0.04-0.12 mol / L tsis muaj qhov cuam tshuam ntawm lub teeb xa hluav taws xob ntawm SiO 2, thaum lub teeb xa hluav taws xob ntawm SiO 2 synthesized los ntawm Na 2SO4 nrog rau cov ntsiab lus ntawm 0.08 mol / L tuaj yeem ncav cuag 97% thiab qhov ntawm SiO 2 synthesized los ntawm NaCl nrog qhov sib xyaw ntawm 0.04-0.12 mol / L tuaj yeem ncav cuag 95% ntawm qhov ntsuas cua kub ntawm 85%. Cov qauv yog amorphous SiO 2 nrog cov qhov loj me me dua 15 micron, uas ua tau raws li cov kev cai ntawm lub teb chaws kev teeb pom kev lag luam tus qauv "QB / T 2346-2007 SiO 2 rau tshuaj txhuam hniav", thiab tuaj yeem siv ua cov tshuaj txhuam hniav abrasive.
Thaum kawg, ntawm lub hauv paus ntawm kev tshawb fawb saum toj no, cov txiaj ntsig ntawm kev ntxiv sulfuric acid rau ntawm cov yam ntxwv ntawm cov khoom tau tshawb xyuas los ntawm kev kho qhov tsis haum ntawm electrolyte. Cov khoom siv lub cev thiab tshuaj ntawm cov khoom tau cim los ntawm XRD, SEM thiab FT-IR. Cov txiaj ntsig pom tau hais tias qhov sib hloov ntawm cov hluavtaws SiO 2 tsub kom nce ua ntej thiab tom qab ntawd poob qis nrog qhov nce ntawm cov concentration ntawm sulfuric acid ntxiv rau hauv qab cawv ntawm autoclave tsis ntxiv electrolyte. Ntxiv cov kev tsim nyog ntawm cov tshuaj electrolyte mus rau hauv qab cawv ntawm lub autoclave tuaj yeem ua kom lub zog qis zuj zus ntawm qhov sib kis ntawm cov hluavtaws SiO 2 tshwm sim los ntawm kev hloov qhov concentration ntawm sulfuric acid ntxiv rau hauv qab cawv ntawm autoclave; tag nrho cov qauv coj los ua cov tshuaj amorphous SiO 2. Nws tuaj yeem siv cov tshuaj txhuam hniav txhuam cov txhuam raws li qhov yuav tsum ua ntawm QB / T 2346-2007 tshuaj txhuam hniav silica.