ʻO nā pōpō lana e lana ana ma luna o ka wai.He hina-keʻokeʻo, lahilahi a hakahaka, a māmā ke kaumaha.ʻO 720kg / m3 ka nui o ka nui (kaumaha), 418.8kg / m3 (māmā), a ʻo ka nui o ka nui e pili ana i 0.1 mm, paʻa ka ʻili a paʻa, liʻiliʻi ka conductivity thermal, a ʻo ka refractoriness ≥1610 ℃.ʻO ka hana kemika o nā peʻa lana ka nui o ka silicon dioxide a me ka alumini oxide.He nui kona mau hiʻohiʻona e like me nā ʻāpana maikaʻi, hollow, ke kaumaha māmā, ka ikaika kiʻekiʻe, ke kūpaʻa aahu, ke kūpaʻa wela kiʻekiʻe, ka insulation thermal, insulation a me ka pale ahi.Hoʻohana nui ʻia ia i kekahi o nā mea maka no ka ʻoihana refractory.