Cov khoom zoo heev thiab kev siv ntawm cenospheres.

Cov khoom zoo heev thiab kev siv ntawm cov cenosphere: siab refractoriness. Cov khoom siv tshuaj lom neeg tseem ceeb ntawm cov cenosphere yog cov oxides ntawm silicon thiab txhuas, uas silicon dioxide yog li 50-65%, thiab txhuas oxide yog li 25-35%. Vim tias qhov melting point ntawm silica yog siab li 1725 degrees Celsius, qhov melting point ntawm txhuas oxide yog 2050 degrees Celsius, ob qho tib si yog siab cov ntaub ntawv refractoryYog li ntawd, cenospheres muaj qhov kub siab heev, feem ntau ncav cuag 1600-1700 degrees Celsius, ua rau lawv yog cov khoom siv refractory zoo heev. Lub teeb yuag, rwb thaiv tsev thermal. Phab ntsa ntawm cenospheres yog nyias thiab hollow, thiab lub qhov yog semi-vacuum, nrog tsuas yog me me ntawm cov roj (N2, H2 thiab CO2, thiab lwm yam), thiab cov cua sov conduction yog qeeb heev thiab me me heev. Yog li ntawd, cenospheres tsis yog tsuas yog lub teeb hauv qhov hnyav (qhov ceev ntawm qhov loj 250-450 kg / m3), tab sis kuj zoo heev hauv rwb thaiv tsev thermal (thermal conductivity ntawm chav tsev kub 0.08-0.1), uas tso lub hauv paus rau lawv los qhia lawv cov txuj ci hauv thaj chaw ntawm cov khoom siv rwb thaiv tsev thermal. Siab hardness thiab lub zog. Vim tias cov cenospheres yog cov iav tawv uas tsim los ntawm silicon txhuas oxide mineral theem (quartz thiab mullite), qhov nyuaj tuaj yeem ncav cuag Mohs theem 6-7, lub zog siab static yog siab txog 70-140MPa, thiab qhov ceev tiag tiag yog 2.10-2.20 g / cm3. piv rau pob zeb. Yog li ntawd, cenospheres muaj lub zog siab. Feem ntau, cov khoom siv porous lossis hollow xws li perlite, zeolite, diatomite, pumice, nthuav dav vermiculite, thiab lwm yam muaj qhov nyuaj thiab lub zog tsis zoo, thiab cov khoom rwb thaiv tsev thermal lossis cov khoom siv refractory ua los ntawm lawv muaj lub zog tsis zoo. Lawv qhov tsis zoo yog qhov zoo ntawm cenospheres, yog li cenospheres muaj kev sib tw ntau dua thiab kev siv dav dua. Qhov loj me me thiab thaj chaw tshwj xeeb loj. Qhov loj me ntawm cov hlaws dai ntuj tsim yog 1-250 microns. Thaj chaw tshwj xeeb yog 300-360cm2 / g, uas zoo ib yam li cement. Yog li ntawd, cenospheres tuaj yeem siv ncaj qha yam tsis tau sib tsoo. Qhov zoo tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam khoom. Lwm cov ntaub ntawv rwb thaiv tsev uas tsis hnyav feem ntau muaj cov khoom loj (xws li perlite, thiab lwm yam). Yog tias lawv raug av, lub peev xwm yuav nce ntxiv ntau heev, thiab qhov rwb thaiv tsev thermal yuav txo qis ntau heev. Hauv qhov no, cenospheres muaj qhov zoo dua. Kev rwb thaiv tsev hluav taws xob zoo heev. Cenospheres, tom qab xaiv cov hlaws dai sib nqus, yog cov ntaub ntawv rwb thaiv tsev zoo heev thiab tsis ua hluav taws xob. Feem ntau, qhov tsis kam ntawm cov insulators txo qis nrog qhov nce ntawm qhov kub, tab sis qhov tsis kam ntawm cenospheres nce nrog qhov nce ntawm qhov kub. Qhov zoo no tsis muaj nrog lwm cov ntaub ntawv rwb thaiv tsev. Yog li ntawd, nws tuaj yeem ua cov khoom rwb thaiv tsev nyob rau hauv qhov kub siab.