Raws li kev cia khoom zoo, hydrated alumina feem ntau tuaj yeem nyob ruaj khov rau 2 txog 3 xyoos. Txawm li cas los xij, "kev ua tsis tau zoo" tsis yog ib qho taw qhia hauv lub sijhawm, tab sis qhov txheej txheem qeeb uas tshwm sim maj mam nyob ntawm qhov chaw cia khoom thiab cov khoom siv.
Txee lub neej nyob rau hauv zoo tagnrho cia: yog nruj me ntsis kaw, tiv thaiv los ntawm lub teeb, thiab muab cia rau hauv ib tug qhuav, txias qhov chaw (humidity<60%, temperature ≤40℃), most hydrated alumina can maintain its performance for more than 2 years, and some high-purity or special crystal forms can reach 36 months.
Ineffectiveness yog qhov tseem ceeb ntawm kev ua haujlwm degradation:
Moisture absorption thiab clumping: Kev cuam tshuam rau qhov chaw ntub dej ua rau lub zog nqus dej, ua rau particle agglomeration, txo qis hauv thaj chaw tshwj xeeb, thiab cuam tshuam rau dispersibility thiab reactivity.
Kev pheej hmoo ntawm kev hloov pauv: Ntev- lub sijhawm khaws cia, tshwj xeeb tshaj yog nyob rau hauv qhov hloov pauv kub thiab av noo, yuav ua rau muaj kev hloov pauv siv lead ua (xws li hloov mus rau -alumina precursors), hloov pauv tus cwj pwm thermal decomposition.
Txo cov plua plav ua haujlwm: Cov qauv hydroxyl nto tuaj yeem hloov pauv vim yog ib puag ncig, txo nws cov haujlwm hauv catalysis lossis ceramic forming.
Thaum twg nws raug suav hais tias "tsis ua haujlwm"? Kev Siv Khoom Siv Khoom Siv: Cov ntaub ntawv nthuav tawm cov agglomeration tseem ceeb, cov dej ntws tsis zoo, cov ntsiab lus noo noo ntau ntxiv, lossis cov qauv XRD uas qhia txog kev hloov pauv crystalline yog suav tias tsis tsim nyog rau cov txheej txheem siab -.
Tsis yog-Cov xwm txheej tseem ceeb: me ntsis ya raws- nqus tab sis tsis yog- cov ntaub ntawv agglomerated tuaj yeem siv rau hauv cov ntawv thov uas yuav tsum muaj kev ua tau zoo dua tom qab ziab.
