Magnesium oxide
Jun 14, 2023
Magnesium oxide yog cov tshuaj sib xyaw nrog cov mis MgO. Nws yog cov hmoov dawb uas tsis muaj ntxhiab thiab tsis qab qab uas tau siv dav hauv ntau qhov kev lag luam suav nrog tshuaj, khoom noj thiab tshuaj. Hauv tsab xov xwm no peb yuav saib txog kev tsim khoom, khoom siv thiab kev siv ntawm magnesium oxide.
Feem ntau npaj los ntawm cua sov magnesium carbonate los yog magnesium hydroxide kom kub heev. Cov txheej txheem hu ua calcination muaj cua sov cov magnesium compound nyob rau hauv ib lub kiln los yog kiln ntawm kub tshaj 800 degrees. Thaum cov khoom sib xyaw ua kom sov, nws tso carbon dioxide los yog dej, tawm hauv qab magnesium oxide.
Nws yog alkaline ntiaj teb hlau oxide nrog lub siab melting point ntawm 2852 degrees. Nws yog insoluble hauv dej thiab muaj pH txog 10.5. Cov hmoov yog heev reactive nrog acids thiab nws cov reactivity nce nrog nce cheeb tsam. Tsis tas li ntawd, nws yog ib qho hluav taws xob zoo thiab thermal insulator thiab cov khoom siv hluav taws kub-resistant.
Magnesium oxide muaj ntau yam kev siv hauv ntau yam lag luam. Hauv kev lag luam kws tshuaj nws yog siv los ua tshuaj antacid thiab laxative. Kuj tseem siv rau hauv kev tsim cov cement thiab ua ib feem ntawm cov ntaub ntawv refractory rau hauv ob sab phlu high-temperature furnaces. Kuj tseem siv los ua zaub mov ntxiv, qhov twg nws ua raws li cov thickener, tus neeg sawv cev tiv thaiv kab mob thiab pH regulator. Hauv kev lag luam tshuaj, nws yog siv los ua cov khoom siv hauv kev tsim cov tshuaj xws li vinyl chloride, uas yog siv rau hauv kev tsim cov PVC. Nws kuj tseem siv rau hauv kev tsim cov ceramics, iav thiab lwm yam khoom siv hauv tsev. Tsis tas li ntawd, nws yog siv los ua ib tug muab tub lim hauv cov khoom yas thiab roj hmab los txhim kho lawv lub cev.
Zuag qhia tag nrho, MgO yog ntau yam tshuaj sib xyaw nrog ntau yam kev siv hauv ntau yam lag luam. Nws cov khoom tshwj xeeb xws li siab melting point, alkalinity thiab reactivity ua rau nws muaj nuj nqis muaj nqis nyob rau hauv ntau yam khoom. Nrog rau qhov kev thov ntau ntxiv rau magnesium oxide nyob rau hauv ntau qhov chaw, nws cov khoom tsim thiab kev siv yuav tsum tau nce ntxiv rau xyoo tom ntej.
