Cenosphere (floating hlaws) yog ib hom ya tshauv hollow pob uas tuaj yeem ntab saum npoo dej.Nws yog grey dawb, nyias thiab hollow nrog lub teeb yuag.Nws ntim hnyav yog 720kg / m3 (hnyav hnyav), 418.8kg / m3 (lub teeb yuag), particle loj yog hais txog 0.1 hli, nws nto yog kaw thiab du, nws thermal conductivity yog me me, thiab nws cov hluav taws kub yog ≥ 1610 ℃.Nws yog qhov kub zoo khaws cov khoom siv refractory, dav siv hauv kev tsim cov teeb castables thiab roj drilling.