Ndeipi nzira chaiyo yekupfurwa kwe zvidhinha zvinopesana?

Kupisa kwezvidhinha zvinoramba kunonyanya kuenderera mberi kwemvura uye kuora kwekaolin kuumba mullite (3Al2O3 · 2SiO2) makristasi. Iyo SiO2 uye Al2O3 mune refractory zvidhinha inogadzira eutectic yakaderera-yakanyungudika silicate ine tsvina panguva yekupfura, iyo inotenderedza mullite makristasi. Iyo tembiricha yepamusoro panguva yekupisa inowanzodzorwa pa1350 ° C kusvika 1380 ° C. Kana kupisa kwekupisa kwepasi-porosity zvidhinha zvevhu zvakakodzera kuwedzera (1420 ° C), shrinkage yezvidhinha zvinoramba ichiwedzera zvishoma, kuitira kuti kuwanda kwezvidhinha zvinopikisa kuwedzere zvishoma, uye porosity yakaderera inogona kuwanikwa. kuderedza.