Qhov refractoriness ntawm siab alumina refractory cib yog tus siab ntawm cov txhuas silicate refractory cov ntaub ntawv. Nrog rau qhov nce ntawm cov ntsiab lus ntawm AL2O3 hauv cov khoom, qhov tsis kam nce ntxiv, feem ntau tsis qis dua 1750 ～ 1790 ℃. Piv txwv li, cov khoom lag luam corundum nrog AL2O3 cov ntsiab lus ntau dua 95% tuaj yeem muaj qhov refractoriness siab npaum li 1900 ～ 2000 ℃.
Cov kab hloov pauv ntawm cov qib siab alumina refractory bricks nyob ntawm qhov hluav taws kub ntawm qhov khoom. Yog tias qhov cub hluav taws kub txaus thiab lub tshuab tua hluav taws txaus, lub ntim yuav ruaj khov thiab cov kab ntxiv yuav hloov me me. Ntawm qhov tsis sib xws, vim recrystallization hauv cov khoom, residual shrinkage yuav tshwm sim.
Lub load softening kub ntawm siab alumina refractory cib txo qis raws li cov ntsiab lus ntawm SiO2 thiab cov hlau oxide hauv cov khoom lag luam nce ntxiv. Feem ntau, lub load softening kub ntawm siab alumina cib yog 1420-1530 ° C. Lub corundum cov khoom lag luam nrog AL2O3 cov ntsiab lus ntau dua 95% muaj load ua kom kub dua 1600 ° C.
Hauv kev lag luam ib txwm refractory, cov txheej txheem ntau lawm ntawm cov qib siab alumina cib thiab ntau-clinker av nplaum cib tseem zoo sib xws. Lub ntsiab qhov txawv yog nyob ntawm qhov feem ntawm clinker hauv cov khoom xyaw. Qhov kev faib ua feem ntawm clinker nyob rau hauv lub qub yog li 90-95%. Tus clinker tau txheeb thiab sieved kom tshem cov hlau ua ntej kev sib tsoo, thiab qhov hluav taws kub kub tseem yog siab.
Qhov refractoriness ntawm siab alumina cib siab tshaj qhov ntawm cov av nplaum cib thiab semi-silica cib, ncav 1750 ~ 1790 ℃, uas yog cov khoom siv refractory.
