Teb: Plaster ntawm Paris hardens los ntawm combining nrog dej. Kev piav qhia: Plaster ntawm Paris yog ntsev ntawm calcium hlau uas tseem hu ua calcium sulfate hemihydrate.
Dab tsi ua rau tawv tawv ntawm Plaster ntawm Paris?
Qhov chaw ntawm plaster ntawm Paris yog vim nws hydration los ua cov muaju ntawm gypsum uas tau teeb tsa los ua cov khoom hnyav. Lub plaster ntawm Paris absorbs dej los tsim orthorhombic calcium sulphate dihydrate uas tsim los ua ib qho nyuaj loj uas muaj monoclinic calcium sulphate dihydrate.
Puas Plaster ntawm Paris teeb tsa nyuaj?
Plaster ntawm paris, ceev-ceev gypsum plaster muaj cov hmoov dawb dawb (calcium sulfate hemihydrate), uas hardens thaum moistened thiab tso cai kom qhuav.
How plaster Harden?
Lub plaster yog tsim los ua cov hmoov qhuav thiab tov nrog dej los ua ib qho tawv tab sis ua haujlwm tau muab tshuaj txhuam tam sim ua ntej nws siv rau saum npoo. Cov tshuaj tiv thaiv nrog dej liberates cua sov los ntawm crystallization thiab hydrated plaster ces hardens.
Dab tsi ntxiv rau Plaster ntawm Paris hmoov kom nws mus nyuaj?
Plaster ntawm Paris yog tsim los ntawm calcium sulfate dihydrate, (CaSO4. 2H2O), nquag hu ua gypsum. … Yog li, thaum peb yuav Plaster ntawm Paris, peb tab tom yuav cov hemihydrate ntawm calcium sulfate. Txhawm rau ua kom nws cov khoom castable peb ntxiv dejkom nws dhau los ua cov dihydrate dua!
