Floating hlaws yog ib hom ya tshauv hollow pob uas tuaj yeem ntab saum npoo dej.Nws yog grey dawb, nyias thiab hollow nyob rau hauv phab ntsa, lub teeb nyob rau hauv hnyav, nrog unit hnyav ntawm 720kg / m3 (hnyav) thiab 418.8kg / m3 (lub teeb), particle loj li ntawm 0.1 hli, kaw thiab du nto, me me nyob rau hauv thermal conductivity, thiab hluav taws kub tsis kam ≥ 1610 ℃.Nws yog ib qho zoo heev kub tuav refractory, dav siv nyob rau hauv zus tau tej cov lub teeb castables thiab roj drilling.Cov tshuaj muaj pes tsawg leeg ntawm cov hlaws ntab yog feem ntau silicon dioxide thiab aluminium oxide.Nws muaj ntau yam ntxwv, xws li cov khoom zoo, hollow, lub teeb yuag, siab zog, hnav tsis kam, kub tsis kam, thermal rwb thaiv tsev, rwb thaiv tsev thiab nplaim taws retardancy.Nws yog ib qho ntawm cov khoom siv raw siv dav hauv kev lag luam hluav taws kub.

Taw qhia

Kev ua tau zoo heev thiab kev siv cov hlaws ntab ntab

Siab hluav taws kub.Cov tshuaj lom neeg tseem ceeb ntawm cov hlaws ntab yog silicon thiab aluminium oxides, ntawm cov silicon dioxide yog li 48-66% thiab aluminium oxide yog li 26-36%.Vim hais tias lub melting point ntawm silicon dioxide yog 1720 ℃ thiab cov txhuas oxide yog 2060 ℃, ob leeg yog siab refractories.Yog li ntawd, cov hlaws ntab muaj hluav taws kub heev, uas feem ntau ncav cuag 1620-1800 ℃, ua rau nws ua tau zoo heev refractory.Lub teeb yuag, thermal rwb thaiv tsev.Lub phab ntsa ntawm cov hlaws ntab yog nyias thiab hollow, thiab cov kab noj hniav yog semi-vacuum.Tsuas muaj cov pa roj tsawg heev (N2, H2, CO2, thiab lwm yam), thiab cov cua kub ua haujlwm qeeb heev.Yog li, cov hlaws ntab ntab tsis yog lub teeb hauv qhov hnyav (250-450 kg / m3).Lub ntuj particle loj ntawm ntab hlaws dai yog 1-250 microns.Drift hlaws 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 yog feem ntau ntawm qhov loj me me (xws li perlite).Yog hais tias lawv yog grinded, lub peev xwm yuav tau zoo heev, thiab cov thermal rwb thaiv tsev yuav txo tau heev.Hauv qhov no, Drifting hlaws muaj qhov zoo.Hluav taws xob rwb thaiv tsev zoo heev.Cov hlaws ntab tom qab xaiv cov hlaws sib nqus yog cov khoom siv insulating nrog kev ua haujlwm zoo thiab tsis ua hluav taws xob.Feem ntau, qhov tsis kam ntawm insulators txo nrog qhov nce ntawm qhov kub thiab txias, thaum cov hlaws ntab nce ntxiv nrog qhov nce ntawm qhov kub.Qhov txiaj ntsig no tsis muaj los ntawm lwm cov ntaub ntawv insulating.Yog li ntawd, nws tuaj yeem siv los ua cov khoom insulating nyob rau hauv qhov kub thiab txias.