Magnesium aluminium spinel resistant refractory khoom yog cov khoom siv refractory uas muaj magnesium thiab magnesium oxide cov ntsiab lus (cov qhab nia loj) tsis tsawg dua 20 feem pua. Vim muaj ntau yam kev hloov pauv hauv cov ntsiab lus ntawm Al₂O ₃ thiab MgO, peb yuav siv Al₂O₃ thiab MgO thiab MgO Cov khoom siv refractory rau cov khoom xyaw tseem ceeb yog sib sau ua ke hu ua magnesium aluminium refractory cov ntaub ntawv.
MgAl2O4 yog cov khoom tseem ceeb ntawm magnesium aluminium refractory khoom. Nws belongs rau ib tug qauv spinel. Nws muaj kev ua tau zoo heev xws li cov ntsiab lus melting siab, qis thermal expansion coefficients, zoo mechanical zog thiab slag kuj.
Muaj qee qhov tsis xws luag siv cov khoom siv tes ua haujlwm (uas yog, cov khoom loj ntawm MgO thiab Al₂O ₃ los npaj MgAL₂O ₄ tom qab kub kub sintering), uas ua rau muaj teeb meem hauv qab no hauv cov khoom siv magnesium thiab aluminium refractory: ntawm ib sab, sintering kev ua tau zoo yog tsis zoo, vim hais tias cov txheej txheem ntawm spinel tsim yuav nrog 5 nrog 5 feem pua mus rau 8 feem pua ntawm cov ntim nthuav tawm cov nyhuv, muaj ntau cov kab nrib pleb thiab micro-pores hauv cov qauv micro, uas nyuaj rau kev npaj cov khoom ntom ntom. ; Ntawm qhov tod tes, cov khoom siv kho tshuab tsis zoo. Kev tawg tuaj yeem txhim kho nws cov kev ua haujlwm kub ntxhov rau qee qhov, tab sis raws li cov ntsiab lus ntawm cov khoom loj spinels nce, micro-crack defects thiab lub zog poob nce, nws yog qhov nyuaj rau kev ua kom tau raws li kev loj hlob ntawm kev lag luam kub. Nano-technology yog ib qho kev daws teeb meem zoo rau cov kev daws teeb meem zoo ntawm sintering kev ua tau zoo, cov khoom siv kho tshuab thiab kev ua haujlwm los tiv thaiv seismic magnesium aluminium refractory cov ntaub ntawv.
Kev siv nano-technology los txhim kho cov kev ua haujlwm sintering, kev ua haujlwm zoo, thiab thermal poob siab tsis kam ntawm magnesium thiab aluminium refractory cov ntaub ntawv, feem ntau nyob rau hauv ob yam: Ua ntej, nanoparticles muaj cov teebmeem saum npoo thiab cov teebmeem me me, uas tuaj yeem txo cov ntsiab lus ntawm MgO. thiab Al₂O₃, Txo qhov sib txawv ntawm qhov sib txawv ntawm cov khoom, txhawb cov khoom sintering, thiab txhim kho kev siv tshuab. Qhov thib ob, kev sib raug zoo ntawm kev tswj qhov ntev ntawm micro-crack thiab qhov luaj li cas ntawm cov nplej yog tus yuam sij rau kev tswj kev sib raug zoo ntawm sintering kev ua tau zoo, mechanical kev ua tau zoo, thiab thermal seismic kev ua tau zoo ntawm magnesium aluminium refractory khoom. Thaum cov qoob loo loj dua li qhov tseem ceeb ntawm cov qoob loo, cov kab nrib pleb yuav tshwm sim hauv cov khoom, thiab qhov tawg ntev yuav nce nrog qhov loj ntawm cov nplej. Lub grain loj ncav cuag ib tug tej degree. Qhov kev siv zog yuav luag ploj. Rau kev siv nano-level raw cov ntaub ntawv, qhov ntev thiab ntau ntawm cov micro-cracks hauv cov khoom yuav raug txo. Nano-granular hais yog yooj yim dua rau buffer tshav kub kev nyuaj siab thiab txhim kho lub zog thiab toughness ntawm cov khoom.
