Material Classification ntawm Foamed Ceramics
Foamed ceramics, raws li cov khoom sib sib zog nqus porous, feem ntau yog tsim los ntawm cov txheej txheem kub - kub foaming. Raws li cov khoom sib txawv, lawv feem ntau muab faib ua peb hom khoom nram qab no:
Silicate-raws li foamed ceramics: Siv quartz xuab zeb, feldspar, thiab lwm yam, raws li cov ntaub ntawv tseem ceeb, lawv muaj cov thermal rwb thaiv tsev zoo thiab tus nqi qis.
Alumina-raws li foamed ceramics: Siv alumina ua cov khoom tseem ceeb, lawv muaj zog txhua yam thiab siab -kub tsis kam.
Composite-raws li foamed ceramics: Muaj ntau cov oxides, lawv cov khoom tshwj xeeb ntawm lub cev thiab tshuaj lom neeg tuaj yeem hloov kho.
Kev ua tau zoo ntawm cov khoom sib txawv
Txhua hom foamed ceramic muaj nws qhov kev ua tau zoo tshwj xeeb:
Silicate-raws li: Tsawg ntom, tsis tshua muaj thermal conductivity, haum rau lub tsev rwb thaiv tsev.
Alumina-raws li: Siab compressive zog, muaj zog corrosion kuj, haum rau siab -kub muaj ib puag ncig.
Composite-raws li: Porosity thiab lub zog tuaj yeem hloov kho raws li qhov xav tau, siv tau rau ntau qhov xwm txheej.