Cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov hlaws ntab yog cov oxide ntawm silicon thiab txhuas, uas cov ntsiab lus ntawm silicon dioxide yog li 50-65%, thiab cov ntsiab lus ntawm txhuas oxide yog li 25-35%.Vim hais tias lub melting point ntawm silica yog siab li 1725 ℃ thiab cov alumina yog 2050 ℃, lawv yog tag nrho cov ntaub ntawv siab refractory.Yog li ntawd, cov hlaws ntab ntab muaj qhov kub siab heev, feem ntau mus txog 1600-1700 ℃, ua rau lawv zoo heev refractories.Lub teeb yuag, thermal rwb thaiv tsev.Lub pob zeb ntab phab ntsa yog nyias thiab hollow, cov kab noj hniav yog ib lub tshuab nqus tsev, tsuas yog ib qho me me ntawm cov pa roj (N2, H2 thiab CO2, thiab lwm yam), thiab cov cua sov conduction qeeb heev thiab me me.Yog li ntawd, cov hlaws dai tsis yog tsuas yog lub teeb hauv qhov hnyav (qhov hnyav 250-450 kg / m3), tab sis kuj zoo heev hauv thermal rwb thaiv tsev (thermal conductivity 0.08-0.1 ntawm chav tsev kub), uas nteg lub hauv paus rau lawv ua lub luag haujlwm tseem ceeb. nyob rau hauv lub tshav pob ntawm lub teeb thermal rwb thaiv tsev cov ntaub ntawv.

High hardness thiab lub zog.Vim tias cov hlaws ntab yog lub khob iav tawv uas tsim los ntawm silica alumina ntxhia theem (quartz thiab mullite), nws qhov nyuaj tuaj yeem ncav cuag Mohs 6-7, lub zog zoo li qub tuaj yeem ncav cuag 70-140mpa, thiab nws qhov ceev yog 2.10-2.20g / cm3. , uas yog sib npaug ntawm pob zeb.Yog li ntawd, cov hlaws ntab ntab muaj lub zog siab.Feem ntau, lub teeb ntxeem tau los yog hollow cov ntaub ntawv xws li perlite, boiling pob zeb, diatomite, sepiolite thiab nthuav vermiculite muaj tsis zoo hardness thiab lub zog.Cov khoom siv hluav taws xob rwb thaiv tsev lossis cov khoom siv hluav taws xob hluav taws xob ua los ntawm lawv muaj qhov tsis zoo ntawm lub zog tsis zoo.Lawv qhov tsis zoo tsuas yog qhov muaj zog ntawm cov hlaws dai, yog li cov hlaws ntab ntab muaj qhov sib tw zoo dua thiab siv dav dua.Qhov loj me me yog qhov zoo thiab thaj chaw tshwj xeeb yog loj.Lub ntuj loj ntawm cov hlaws ntab ntab yog 1-250 μ M. Qhov tshwj xeeb thaj chaw yog 300-360cm2 / g, zoo ib yam li cov cement.Yog li ntawd, cov hlaws ntab ntab tuaj yeem siv ncaj qha yam tsis muaj kev sib tsoo.

Fineness tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam khoom, lwm yam khoom siv hluav taws xob thermal rwb thaiv tsev feem ntau yog qhov loj me me (xws li perlite, thiab lwm yam), yog tias sib tsoo yuav ua rau muaj peev xwm ua kom cov thermal rwb thaiv tsev txo qis heev.Hauv qhov no, cov hlaws ntab ntab muaj qhov zoo.Hluav taws xob rwb thaiv tsev zoo heev.Cov hlaws ntab ntab yog cov khoom siv insulating zoo heev thiab tsis muaj kev cuam tshuam.Feem ntau, qhov tsis kam ntawm insulator txo nrog qhov nce ntawm qhov kub thiab txias, tab sis qhov tsis kam ntawm cov hlaws ntab nce nrog qhov nce ntawm qhov kub thiab txias.Qhov txiaj ntsig no tsis muaj los ntawm lwm cov ntaub ntawv insulating.Yog li ntawd, nws tuaj yeem ua cov khoom rwb thaiv tsev nyob rau hauv qhov kub thiab txias.