Dab tsi yog cov txheej txheem tshwj xeeb ntawm kev tua hluav taws ntawm refractory cib?

Cov txheej txheem tua hluav taws ntawm cov cib refractory feem ntau yog cov txheej txheem ntawm lub cev qhuav dej tas li thiab decomposition ntawm kaolin los ua mullite (3Al2O3·2SiO2) muaju. SiO2 thiab Al2O3 nyob rau hauv lub refractory cib tsim eutectic low-melting silicate nrog impurities thaum lub sij hawm firing txheej txheem, uas nyob ib ncig ntawm lub mullite crystals. Qhov kub siab tshaj plaws thaum lub sijhawm tua hluav taws yog feem ntau tswj ntawm 1350 ° C txog 1380 ° C. Yog hais tias qhov hluav taws kub ntawm cov av nplaum uas tsis tshua muaj av nplaum yog tsim nyog nce (1420 ° C), lub shrinkage ntawm refractory bricks yuav nce me ntsis, yog li ntawd qhov ceev ntawm cov refractory bricks yuav nce me ntsis, thiab cov porosity tsawg tuaj yeem ua tiav. txo.