Dab tsi yog yam cuam tshuam rau kev ua haujlwm ntawm Lub teeb yuag thermal rwb thaiv tsev cib?

Lub teeb yuag thermal rwb thaiv tsev cib muaj cov qauv tsim thiab kev ua haujlwm hnyav, thiab ntau yam cuam tshuam rau lawv cov thermal rwb thaiv tsev. Tsis tas li ntawd, ntau yam cuam tshuam rau ib leeg thiab muaj feem cuam tshuam rau ib leeg, ua rau kev tsom xam thiab kev tshawb fawb nyuaj ua tiav. Txawm li cas los xij, ntawm ntau yam cuam tshuam, cov khoom muaj pes tsawg leeg thiab cov qauv, huab cua permeability thiab huab cua permeability, bulk ntom thiab kub. Lub teeb yuag thermal rwb thaiv tsev cib yog cov tseem ceeb.

Cov khoom muaj pes tsawg leeg thiab cov qauv Cov tshuaj ntxhia muaj pes tsawg leeg thiab cov qauv crystalline ntawm cov khoom yog cov tseem ceeb cuam tshuam rau cov thermal conductivity ntawm lub teeb yuag rwb thaiv tsev cib. Feem ntau hais lus, qhov nyuaj ntawm cov qauv siv lead ua ntawm lub teeb yuag rwb thaiv tsev cib, qhov qis dua nws cov thermal conductivity. Cov theem khoom ntawm ib yam khoom tuaj yeem muab faib ua ib theem crystalline thiab qib iav. Vim yog kev co thiab kev sib tsoo, atoms (ions) hloov lub zog kinetic los ntawm atoms (ions) nrog lub zog kinetic ntau dua rau lwm cov atoms (ions) nrog qis zog kinetic, thiab cov atoms (ions) nyob rau hauv lub iav theem yog teem nyob rau hauv ib tug disorderly yam, yog li qhov kev tiv thaiv tau ntsib thaum lub sijhawm txav mus los yog siab dua li cov txheej txheem txheej txheem ntawm crystal theem. Yog li ntawd, lub thermal conductivity ntawm iav theem yog qis dua li ntawm crystalline theem. Txawm li cas los xij, tom qab qhov kub nce mus rau ib theem, qhov viscosity ntawm lub iav theem txo qis, qhov kev tiv thaiv rau kev txav ntawm atoms (ions) txo qis, thiab thermal conductivity ntawm iav theem nce. Tab sis lub crystalline theem yog qhov opposite. Thaum qhov kub thiab txias, lub zog kinetic ntawm cov atoms (ions) nce thiab kev co nce, kom txoj kev dawb yog luv thiab thermal conductivity txo. Nyob rau hauv cov qauv sab hauv ntawm lub teeb rwb thaiv tsev cib, cov khoom theem yog sib cais los ntawm ntau qhov pores ntawm ntau qhov sib txawv, thiab cov khoom txuas txuas ntxiv tsis tuaj yeem tsim los ntawm cov cua sov. Roj theem hluav taws xob hloov pauv feem ntau ntawm cov khoom siv hluav taws xob hloov hluav taws xob, yog li cov hluav taws xob hluav taws xob Cov coefficient tsawg heev.

Lub porosity thiab porosity ntawm refractories nrog pore yam ntxwv yog inversely proportional rau thermal conductivity coefficient, thiab thermal conductivity coefficient nce linearly nrog qhov nce ntawm porosity. Lub sijhawm no, kev ua haujlwm ntawm lub teeb yuag rwb thaiv tsev cib yog qhov tshwj xeeb tshaj plaws. Tab sis thaum lub porosity zoo ib yam, qhov me me ntawm qhov pore loj, qhov sib txawv ntawm qhov kev faib tawm, thiab qis dua thermal conductivity. Nyob rau hauv qhov me me pores, huab cua nyob rau hauv lub pores yog kiag li absorbed nyob rau hauv lub pores phab ntsa, thermal conductivity nyob rau hauv lub pores yog txo, thiab thermal conductivity nyob rau hauv lub pores yog txo. Txawm li cas los xij, raws li qhov loj ntawm lub qhov cua nce, cov hluav taws xob hluav taws xob nyob rau ntawm phab ntsa sab hauv ntawm lub qhov cua thiab cov cua kub hloov pauv ntawm cov huab cua hauv lub qhov cua nce, thiab thermal conductivity kuj nce. Raws li cov ntaub ntawv muaj feem xyuam, thaum lub tshav kub hluav taws xob tsawg heev, tshwj xeeb tshaj yog thaum lub qhov hws ntev yog tsim nyob rau hauv lub dav hlau kev taw qhia, cov pores me me feem ntau tsim cov hluav taws xob hluav taws xob. Qee lub sij hawm, qhov kub hloov ntawm ib qho khoom pore yog siab dua li ntawm cov khoom nrog pores. Lub phenomenon ua kub. Lub thermal conductivity ntawm kaw qhov pores yog me dua li qhov qhib pores.

Lub thermal conductivity ntawm thermal rwb thaiv tsev bricks nrog sib zog bulk ntom muaj ib tug linear kev sib raug zoo nrog tej density, uas yog, raws li cov bulk ntom, lub thermal conductivity kuj nce. Lub ntim ntom ntom ncaj qha cuam tshuam qhov porosity sab hauv ntawm lub teeb yuag rwb thaiv tsev cib. Qhov tsis tshua muaj qhov ntom ntom qhia tau hais tias muaj ntau qhov pores hauv cov khoom, cov ntsiab lus sib txuas ntawm cov khoom siv tau raug txo, cov khoom siv hluav taws xob raug txo qis, thiab thermal conductivity txo.

Lub thermal conductivity ntawm lub teeb-kub thermal rwb thaiv tsev cib muaj ib tug linear kev sib raug zoo nrog kub, uas yog, lub thermal conductivity nce nrog nce kub. Piv nrog tuab regractory cov ntaub ntawv, lub thermal conductivity ntawm lub teeb rwb thaiv tsev rwb thaiv tsev cib txo qis dua nrog kev nce qib. Qhov laj thawj yog tias siv cov khoom siv reghractory feem ntau ua rau kub hauv cov theem khoom. Thaum qhov kub nce, qhov thermal txav ntawm cov khoom molecules intensifies, thiab thermal conductivity nce. Cov qauv ntawm lub teeb yuag rwb thaiv tsev bricks yog dominated los ntawm roj theem (65 ~ 78%). Thaum qhov kub thiab txias, qhov kev hloov ntawm thermal conductivity yog ib txwm me dua li ntawm cov khoom theem.