Molten alumina fused dawb corundum

Feem ntau hu ua "fused alumina" feem ntau yog hais txog "fused dawb corundum". Nws yog tsim los ntawm calcined alumina los yog muaj alumina raws li raw cov ntaub ntawv, melted ntawm kub nyob rau hauv ib tug hluav taws xob arc rauv, nrog AI2O3 Ntau tshaj los yog sib npaug rau 99%, dawb, thaiv cov khoom, pom porosity ntawm 6% ~ 10%, lub ntsiab siv lead ua theem ntawm - Al2O3, muaju nyob rau hauv daim ntawv ntawm ntev strips thiab pob zeb diamond, thiab feem ntau nyob rau hauv daim ntawv ntawm skeletal crystals.
Vim yog qhov purity ntawm cov ntaub ntawv raw, tsis muaj tshuaj lom neeg tshwm sim thaum lub sij hawm hluav taws xob ua haujlwm, tab sis qhov kub thiab txias ntawm cov kua molten muaj qhov cuam tshuam loj rau cov qauv ntawm cov khoom thaiv. Hais txog homogenization, nws yog ib qho tseem ceeb kom tau txais cov blocks uas tuab li sai tau. Thaum Na2O nyob rau hauv cov ntaub ntawv raw solidifies, nws tsim - AI2O3, uas yog yooj yim concentrated nyob rau hauv lub hauv paus ntawm lub block thiab muaj peev xwm muaj kev phiv los ntawm refractory thiab sib tsoo cov ntaub ntawv. Yog li ntawd, nws yog ib qho tsim nyog yuav tau xyuam xim rau cov ntsiab lus ntawm Na2O hauv cov khoom siv raw. Tsis tas li ntawd, muaj ib qho me me ntawm garnet iav sib npaug hauv cov khoom thaiv.