Txoj kev npaj ntawm alumina (1)

Alumina yog dab tsi?
Alumina, uas nws cov mis yog Al₂O₃, yog cov hmoov dawb amorphous uas yog insoluble hauv dej thiab soluble nyob rau hauv muaj zog acids thiab bases. Alumina muaj cov yam ntxwv ntawm siab hardness, siab melting point thiab corrosion kuj. Raws li cov qauv siv lead ua sib txawv, alumina tuaj yeem muab faib ua ntau hom, xws li -alumina, -alumina thiab lwm yam. Alpha-alumina yog cov khoom siv lead ua ruaj khov tshaj plaws, nrog kev ua haujlwm siab thiab siab melting point, thiab feem ntau yog siv rau hauv kev tsim cov refractories thiab abrasives. Gamma-alumina yog ib qho active alumina nrog ib tug loj cheeb tsam thiab adsorption zog, thiab feem ntau yog siv nyob rau hauv catalysts thiab adsorbents.

Qhov thib ob, ib qho ntawm kev npaj ntawm alumina

Txoj kev Calcining
Fluoride pollution ntawm dej yog ib qho teeb meem thoob ntiaj teb. Activated alumina thiab regenerated activated alumina tau siv nyob rau hauv txoj kev tshawb no los tshem tawm cov fluoride ions los ntawm dej. Muaj boehite yog calcined nyob rau hauv thaj tsam 573K mus rau 1473K, thiab thaum lub calcination kub ntawm 773K thiab 1473K, cov qauv yog hloov mus rau gamma-alumina (activated alumina). Ntxiv mus, BET cov ntaub ntawv tau pom tias thaj chaw tshwj xeeb ntawm tus qauv maj mam txo qis hauv qhov ntsuas kub no.
-alumina tuaj yeem tsim los ntawm cov ntaub ntawv sib txawv kom tau txais cov khoom siv ceramic nrog txawv microstructure thiab mechanical resistance. Lub synthesis ntawm -alumina blocks los ntawm -alumina hmoov tau kawm los txheeb xyuas cov khoom siv ntawm cov khoom siv sintered. Qhov sib ntxiv ntawm graphene oxide rau -alumina hmoov kuj tau kawm.

Yog tias koj txaus siab rau peb, thov nyem rau ntawm qhov txuas hauv qab no txhawm rau tshawb xyuas peb lossis cov khoom koj xav tau ntawm Made in China lub vev xaib

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