Alumina fiber ntau yog polycrystalline inorganic fiber ntau tsim los ntawm txhuas oxide (Al₂O₃); nws feem ntau muaj kwv yees li 5% silicon dioxide (SiO₂) kom stabilize lub crystal theem thiab inhibit grain loj hlob. Nws thawj cov ntaub ntawv crystalline muaj xws li -, δ-, θ-, thiab -alumina. Cov fibers feem ntau muaj txoj kab uas hla ntawm 3-7 micrometers thiab ib leeg-filament ntev ntawm 10-150 millimeters; lawv tshwm dawb, du, mos, thiab elastic [7]. Qhov ceev ntawm alumina fiber ntau yog kwv yees li 3.4 g / cm³.

Alumina fibers muaj lub siab melting point, feem ntau tshaj 2000℃(cov nqi tshwj xeeb, xws li 2038℃lossis 1840 degree, txawv nyob ntawm cov khoom muaj pes tsawg leeg). Lawv tsim nyog rau kev siv mus sij hawm ntev ntawm qhov kub ntawm 1300℃mus rau 1600℃thiab muaj cov thermal conductivity tsawg, tshav kub shrinkage, thiab tshav kub muaj peev xwm.

Alumina fibers ua kom pom kev ruaj ntseg tshuaj zoo, tso cai rau siv nyob rau hauv acidic ib puag ncig, oxidizing lossis txo cov cua, thiab lub tshuab nqus tsev. Thaum lawv muaj qee qhov kev tiv thaiv rau alkaline ib puag ncig, lawv muaj kev cuam tshuam rau corrosion los ntawm txhuas vapor thiab vanadium pentoxide.

Alumina fibers muaj cov yam ntxwv ntawm qhov kub thiab txias, tiv thaiv corrosion, hluav taws xob rwb thaiv tsev, thiab hnav tsis kam. Zoo li aluminium silicate fibers, lawv nyob rau hauv qeb ntawm ceramic fibers tab sis muaj kev khiav hauj lwm kub ntau dua.