Qhov kub kub nthuav dav ntawm cov hluav taws kub refractory cib hais txog qhov kub thiab txias ntawm cov cib, thiab cov coefficient ntawm kev nthuav dav yog hais txog qhov sib txawv ntawm qhov sib txawv ntawm qhov hluav taws kub thaum kub nce.
Corundum cib thiab mullite cib yog cov khoom siv qib siab hauv thaj tsam ntawm refractory, kuj yog rau alumina series. Nyob rau hauv sib piv, corundum cib muaj ib tug qis expansion coefficient tshaj mullite cib.
Corundum cib muaj qhov siab melting point, ruaj khov kub ua haujlwm thiab zoo hnav tsis kam.
Mullite cib zoo ib yam li siab alumina firebrick. Muaj ob hom mullite, ib qho yog mullite uas ua los ntawm cov aluminium-muaj clinker ntawm qhov kub thiab txias, thiab lwm yam yog mullite cib ua los ntawm molding thiab firing ntawm ntxiv mullite ntawm qhov kub thiab txias. Tshwj xeeb tshaj yog nrog rau qhov sib ntxiv ntawm mullite refractory cib, sintering kub siab tshaj 1700 degree, tuaj yeem tsim ib txheej ntawm cov yeeb yaj kiab tiv thaiv ntawm qhov kub thiab txias, thiab kev ua haujlwm zoo.
Tom qab cua sov, firebrick yuav nthuav nyob rau hauv ntim, tab sis kuj raws li muaj pes tsawg leeg ntawm cov minerals sib txawv, cov coefficient ntawm thermal expansion kuj txawv. Lub thermal expansion ntawm av nplaum cib, siab alumina cib thiab magnesium cib kuj loj, tab sis lub expansion coefficient ntawm silicon cib yog loj dua vim polycrystalline transformation.
Qhov loj dua qhov coefficient ntawm thermal expansion, qhov ntau unmanageable qhov loj ntawm corundum cib, thiab thermal stability kuj muaj qhov cuam tshuam. Qhov ntau dua qhov coefficient ntawm thermal expansion yog, qhov ntau dua qhov kev ntxhov siab sab hauv yuav yog tom qab lub cib tau rhuab, thiab nws yooj yim rau kev puas tsuaj thaum kub hloov sai.
Qhov me me qhov nthuav coefficient yog, qhov me me qhov hloov pauv tshwm sim los ntawm crystallization, crystal transformation thiab nruam sintering ntawm firebrick nyob rau hauv high kub.
Lub expansion coefficient yog ib qho tseem ceeb indexes ntawm firebrick. Lub ntim ntawm firebrick yuav hloov vim qhov kub thiab txias thaum siv. Nws yuav cuam tshuam rau qhov compact loj ntawm firebrick. Feem ntau hais lus, thaum foob pob hluav taws, cov pob qij txha txuas ntxiv yuav tsum tau teeb tsa raws li cib ntawm cov khoom sib txawv. Yog hais tias lub expansion coefficient loj dhau lawm thiab nws tsis tau ua raws li lub sij hawm, lub cub tawg lub cev yuav tawg vim brick expansion thiab cuam tshuam rau kev siv.
Muaj ntau hom refractory cib nrog sib txawv expansion coefficients. Piv nrog mullite thiab corundum cib, qhov nthuav dav ntawm corundum cib yog qis dua li ntawm mullite.
