ʻO ke ʻano kemika nui o nā momi lana ka oxide o ka silicon a me ka alumini, kahi o ka nui o ka silicon dioxide ma kahi o 50-65%, a ʻo ka nui o ka alumini oxide ma kahi o 25-35%. No ka mea, ʻo ke kiko heheʻe o ka silica he 1725 ℃ a ʻo ka alumina he 2050 ℃, he mau mea refractory kiʻekiʻe lākou a pau. No laila, he kiʻekiʻe loa ka refractoriness o nā momi lana, ma ke ʻano maʻamau a hiki i ka 1600-1700 ℃, e hana ana iā lākou i nā refractory hana kiʻekiʻe maikaʻi loa. Māmā ke kaumaha, insulation thermal. He lahilahi a hakahaka ka paia momi lana, he semi vacuum ka lua, he liʻiliʻi wale nō ke kinoea (N2, H2 a me CO2, etc.), a lohi loa ka hoʻoili wela a liʻiliʻi loa. No laila, ʻaʻole wale nā ​​​​mīkini lana he māmā ke kaumaha (ke kaumaha o ka nui 250-450 kg / m3), akā maikaʻi loa hoʻi i ka insulation thermal (conductivity thermal 0.08-0.1 ma ka mahana o ka lumi), kahi e waiho ai i ke kumu no lākou e pāʻani i kahi kuleana koʻikoʻi ma ke kahua o nā mea insulation thermal māmā.

Paʻakikī kiʻekiʻe a me ka ikaika. No ka mea, he kino aniani paʻakikī ka bead lana i hoʻokumu ʻia e ka silica alumina mineral phase (quartz a me mullite), hiki i kona paʻakikī ke hiki i Mohs 6-7, hiki i ka ikaika o ke kaomi static ke hiki i 70-140mpa, a ʻo kona density maoli he 2.10-2.20g/cm3, ʻo ia hoʻi ka pōhaku. No laila, he ikaika kiʻekiʻe ko nā bead lana. Ma keʻano laulā, ʻo nā mea porous māmā a i ʻole nā ​​​​mea hakahaka e like me ka perlite, ka pōhaku paila, diatomite, sepiolite a me ka vermiculite i hoʻonui ʻia he paʻakikī a me ka ikaika haʻahaʻa. ʻO nā huahana insulation thermal a i ʻole nā ​​​​​​huahana refractory māmā i hana ʻia mai ia mau mea he hemahema o ka ikaika haʻahaʻa. ʻO ko lākou mau hemahema wale nō nā ikaika o nā bead lana, no laila he nui nā pono hoʻokūkū a me nā hoʻohana ākea nā bead lana. Maikaʻi ka nui o ka ʻāpana a nui ka ʻili kikoʻī. ʻO ka nui maoli o nā bead lana he 1-250 μM. ʻO ka ʻili kikoʻī he 300-360cm2 / g, e like me ka sima. No laila, hiki ke hoʻohana pololei ʻia nā bead lana me ka ʻole o ka wili ʻana.

Hiki i ka maikaʻi ke hoʻokō i nā pono o nā huahana like ʻole, ʻo nā mea hoʻomehana wela māmā ʻē aʻe he nui ka nui o nā ʻāpana (e like me ka perlite, a pēlā aku), inā e hoʻonui nui ka wili ʻana i ka hiki, no laila e hoʻemi nui ʻia ka hoʻomehana wela. Ma kēia ʻano, he mau pono nā momi lana. Hoʻomehana uila maikaʻi loa. He mau mea hoʻomehana maikaʻi loa nā momi lana a ʻaʻole alakaʻi. Ma keʻano laulā, emi ka pale ʻana o ka insulator me ka piʻi ʻana o ka mahana, akā piʻi ka pale ʻana o ka momi lana me ka piʻi ʻana o ka mahana. ʻAʻole i loaʻa kēia pono i nā mea hoʻomehana ʻē aʻe. No laila, hiki iā ia ke hana i nā huahana hoʻomehana ma lalo o nā kūlana wela kiʻekiʻe.