Lub pob zeb ntab yog ib hom pob zeb uas ntab tau saum dej. Nws yog xim grey dawb, nyias thiab khoob hauv phab ntsa, hnyav heev, nrog rau qhov hnyav ntawm 720kg / m3 (hnyav) thiab 418.8kg / m3 (sib), qhov loj ntawm cov khoom me me li 0.1 hli, kaw thiab du hauv qhov chaw, me me hauv kev ua kom sov, thiab tiv taus hluav taws ≥ 1610 ℃. Nws yog ib qho khoom siv zoo heev uas khaws cia qhov kub thiab txias, siv dav hauv kev tsim cov khoom siv hluav taws xob thiab kev khawb roj. Cov tshuaj lom neeg ntawm lub pob zeb ntab yog feem ntau yog silicon dioxide thiab txhuas oxide. Nws muaj ntau yam ntxwv, xws li cov khoom me me, khoob, lub teeb yuag, muaj zog siab, tiv taus hnav, tiv taus kub siab, rwb thaiv tsev thermal, rwb thaiv tsev thiab hluav taws kub tsis kam. Nws yog ib qho ntawm cov khoom siv raw siv dav hauv kev lag luam tiv taus hluav taws.

Kev Taw Qhia

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

Kev tiv thaiv hluav taws kub heev. Cov khoom siv tshuaj lom neeg tseem ceeb ntawm cov hlaws dai yog silicon thiab txhuas oxides, uas silicon dioxide yog li 48-66% thiab txhuas oxide yog li 26-36%. Vim tias qhov chaw yaj ntawm silicon dioxide yog 1720 ℃ thiab ntawm txhuas oxide yog 2060 ℃, ob qho tib si yog cov khoom siv hluav taws kub siab. Yog li ntawd, cov hlaws dai muaj kev tiv thaiv hluav taws kub heev, uas feem ntau ncav cuag 1620-1800 ℃, ua rau nws yog cov khoom siv hluav taws kub zoo heev. Lub teeb yuag, rwb thaiv tsev thermal. Phab ntsa ntawm cov hlaws dai yog nyias thiab khoob, thiab qhov chaw yog semi vacuum. Tsuas muaj roj me me xwb (N2, H2, CO2, thiab lwm yam), thiab kev coj cua sov qeeb heev. Yog li ntawd, cov hlaws dai tsis yog tsuas yog lub teeb hauv qhov hnyav (250-450 kg / m3). Qhov loj me ntawm cov hlaws dai yog 1-250 microns. Cov hlaws dai drift tuaj yeem siv ncaj qha yam tsis tau sib tsoo. Qhov zoo tuaj yeem ua tau raws li qhov xav tau ntawm ntau yam khoom. Lwm cov ntaub ntawv rwb thaiv tsev uas tsis hnyav feem ntau yog cov khoom loj (xws li perlite). Yog tias lawv raug sib tsoo, lub peev xwm yuav nce ntxiv ntau heev, thiab lub rwb thaiv tsev yuav txo qis ntau heev. Hauv qhov no, cov hlaws dai Drifting muaj qhov zoo. Kev rwb thaiv tsev hluav taws xob zoo heev. Cov hlaws dai ntab tom qab xaiv cov hlaws dai sib nqus yog cov khoom rwb thaiv tsev uas muaj kev ua tau zoo heev thiab tsis ua hluav taws xob. Feem ntau, qhov kev tiv thaiv ntawm cov insulators txo qis nrog qhov kub nce, thaum cov hlaws dai ntab nce nrog qhov kub nce. Qhov zoo no tsis muaj los ntawm lwm cov ntaub ntawv rwb thaiv tsev. Yog li ntawd, nws tuaj yeem siv los ua cov khoom rwb thaiv tsev hauv qab qhov kub siab.