Yintoni inkqubo ethile yenkqubo yokudubula izitena ezikhanyelayo?

Inkqubo yokudubula yezitena ezichasayo ziyinkqubo yokutshatyalaliswa kwamanzi okuqhubekayo kunye nokuchithwa kwe-kaolin ukwenza i-mullite (3Al2O3 · 2SiO2) i-crystals. I-SiO2 kunye ne-Al2O3 kwisitena esiphikisayo senza i-eutectic low-melting silicate kunye nokungcola ngexesha lenkqubo yokudubula, ejikeleze i-crystals ye-mullite. Elona qondo lobushushu liphezulu ngexesha lenkqubo yokudubula ngokuqhelekileyo lilawulwa kwi-1350 ° C ukuya kwi-1380 ° C. Ukuba ukushisa kokudubula kwezitena zodongwe eziphantsi kwe-porosity kunyuswe ngokufanelekileyo (1420 ° C), i-shrinkage yezitena eziphikisayo iya kunyuka kancane, ukwenzela ukuba ubuninzi bezitena eziphikisayo buya kunyuka kancane, kwaye i-porosity ephantsi inokufumaneka. nciphisa.