Magnesium oxide yog ib hom khoom uas siv dav dav hauv kev lag luam thiab muaj ntau lub hom phiaj. Cov khoom muaj magnesium oxide muaj dab tsi? Nws tau ua li cas?
Magnesium oxide yog tshuaj dawb amorphous. Nws yog odorless, tasteless thiab non-toxic. Qhov sib npaug txheeb ze yog li 3.58 (25 C). Lub ntsiab lus melting yog 2852 C thiab lub npau npau npau yog 3600 C. Nws yog cov dej tsis haum, dej cawv thiab kua qaub lossis kua xaum qhuav. Nws tuaj yeem hloov mus rau hauv cov nplaim hluavtaws los ntawm qhov kub siab tshaj ntawm 1000 tauj C. Thaum tshav kub kub saum toj 1500 (?) C, nws yuav tuag taus magnesia lossis sintered magnesia. Thaum raug carbon dioxide hauv cov pa, tsim muaj magnesium carbonate yooj yim.
Kev Siv: Magnesium oxide yog siv los ua cov khoom ua paj, kua txig, cov khoom ua kom thev plaub thiab cov hluav taws cij (refactory bricks). Magnesium oxide MAAs tau npaj tau los ntawm mixing magnesium chloride thiab lwm yam kev daws teeb meem xws li polishing tus sawv cev, tus tuav, muab cov xim rau xim thiab ntawv, accelerator thiab activator rau chloroprene roj hmab. Pharmaceutically, nws yog siv raws li ib qho kev antacid thiab laxative, rau hyperacidity ntawm plab thiab ulcer ntawm plab thiab duodenum. Nws tseem siv tau rau hauv iav, dyes, phenolic plastics, thiab lwm yam. Cov qib zaub mov yog siv los ua cov zauv hauv cov xuab zeb thiab pH kev tswj ntawm ice cream hmoov.
Txoj kev ntawm kev npaj: dej qab zib txoj kev, ammonium carbonate hom
High-purity magnesium oxide txheej txheem: siv cov brine ua cov ntsiab raw, ammonia los yog alkali ua precipitator, thawj ua magnesium hydroxide, ces calcined thiab decomposed rau hauv magnesium oxide. Tam sim no, magnesium oxide uas ua los ntawm ammonia yuav tsum yog ntau tshaj li 99% nrog Qinghai halogen nplej los yog lwm yam tshuaj hydrous magnesium chloride raws li cov ntaub ntawv tseem ceeb raw li, thiab cov tshuab loj loj ntawm magnesium oxide yuav tsum paub tab.