Cov khoom zoo heev thiab kev siv ntawm cenospheres.

Cov khoom zoo heev thiab kev siv ntawmcenospheres : siab refractoriness. Lub ntsiab chemical Cheebtsam ntawmcenospheres yog oxides ntawm silicon thiab txhuas, uas silicon dioxide yog li ntawm 50-65%, thiab txhuas oxide yog li ntawm 25-35%. Vim tias qhov melting point ntawm silica yog siab li 1725 degrees Celsius, lub melting point ntawm txhuas oxide yog 2050 degrees Celsius, ob qho tib si yog siab.cov ntaub ntawv refractory . Yog li ntawd, cenospheres muaj siab heev refractoriness, feem ntau ncav cuag 1600-1700 degrees Celsius, ua rau lawv ib tug zoo heev cov khoom siv refractory. Lub teeb, thermal rwb thaiv tsev. Lub phab ntsa ntawm lub cenospheres yog nyias thiab hollow, thiab cov kab noj hniav yog semi-nqus, tsuas yog ib tug me me ntawm cov pa roj (N2, H2 thiab CO2, thiab lwm yam), thiab lub tshav kub conduction yog qeeb heev thiab tsis tshua muaj me me. Yog li ntawd, cenospheres tsis tsuas yog lub teeb nyob rau hauv qhov hnyav (qhov hnyav 250-450 kg / m3), tab sis kuj zoo heev hauv thermal rwb thaiv tsev (thermal conductivity ntawm chav tsev kub 0.08-0.1), uas nteg lub hauv paus rau lawv los qhia lawv cov txuj ci nyob rau hauv lub tshav pob. ntawm lub teeb yuag thermal rwb thaiv tsev cov ntaub ntawv. High hardness thiab lub zog. Vim hais tias cov cenospheres yog cov iav tawv tawv tsim los ntawm silicon aluminium oxide mineral theem (quartz thiab mullite), qhov nyuaj tuaj yeem ncav cuag Mohs qib 6-7, lub zog zoo li qub yog siab li 70-140MPa, thiab qhov ceev ceev yog 2.10-2.20. g/cm3. piv rau pob zeb. Yog li ntawd, cenospheres muaj zog heev. Feem ntau, lub teeb porous los yog hollow cov ntaub ntawv xws li perlite, zeolite, diatomite, pumice, nthuav vermiculite, thiab lwm yam muaj hardness tsis zoo thiab lub zog, thiab thermal rwb thaiv tsev cov khoom los yog lub teeb yuag refractory khoom ua los ntawm lawv muaj lub zog tsis zoo. Lawv qhov tsis txaus yog qhov zoo ntawm cenospheres, yog li cenospheres muaj kev sib tw ntau dua thiab siv dav dua. Fine particle loj thiab loj tshwj xeeb thaj chaw. Qhov loj me me ntawm cov hlaws tsim ib txwm muaj yog 1-250 microns. Qhov chaw tshwj xeeb yog 300-360cm2 / g, uas zoo ib yam li cov cement. Yog li ntawd, cenospheres tuaj yeem siv ncaj qha yam tsis muaj kev sib tsoo. Lub fineness tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam khoom. Lwm cov ntaub ntawv thermal rwb thaiv tsev feem ntau muaj qhov loj me me (xws li perlite, thiab lwm yam). Yog tias lawv nyob hauv av, lub peev xwm yuav tau nce siab heev, thiab thermal rwb thaiv tsev yuav raug txo kom tsawg. Hauv qhov no, cenospheres muaj qhov zoo dua. Hluav taws xob rwb thaiv tsev zoo heev. Cenospheres, tom qab cov hlaws sib nqus raug xaiv, yog cov khoom siv insulating zoo heev thiab tsis muaj hluav taws xob. Feem ntau, qhov kev tiv thaiv ntawm cov insulators txo qis nrog qhov nce ntawm qhov kub thiab txias, tab sis qhov tsis kam ntawm cenospheres nce nrog qhov kub thiab txias. Qhov zoo dua no tsis muaj nrog lwm cov ntaub ntawv insulating. Yog li ntawd, nws tuaj yeem ua cov khoom insulating nyob rau hauv qhov kub thiab txias.