Alumina ceramic yog cov khoom siv yooj yim, paub tab hauv kev tsim khoom, tus nqi qis, zoo heev hauv kev tawv thiab kev tiv thaiv hnav. Nws feem ntau yog siv rau hauv cov kav dej ceramic uas tiv taus hnav, cov qhov dej uas tiv taus hnav ua cov ntaub ntawv hauv pem teb, thiab tseem tuaj yeem vuam nrog cov ntsia hlau lossis nplaum rau phab ntsa sab hauv ntawm cov khoom siv sib cais xws li lub tshuab zeb ntsug kev lag luam, lub tshuab sib tov hmoov thiab cua daj cua dub, uas tuaj yeem muab kev tiv thaiv hnav 10 npaug ntawm qhov chaw ntawm cov khoom siv. Hauv cov ntaub ntawv uas tiv taus hnav, feem ntawm kev ua lag luam ntawm alumina tuaj yeem ncav cuag li 60% ~ 70%.
Qhov tseem ceeb tshaj plaws ntawm cov khoom siv ceramic SiC yog qhov ua tau zoo thermal shock. Nyob rau hauv qhov kub siab, cov khoom siv muaj cov khoom siv kho tshuab ruaj khov thiab siv tau ruaj khov ntawm 1800 ℃ ntev. Qhov thib ob yog tias cov khoom siv silicon carbide tuaj yeem siv los tsim cov khoom loj nrog me me deformation. Nws feem ntau yog siv rau hauv preheater dai daim ntawm kev lag luam cement, kub siab hnav-resistant ceramic nozzle, thee poob yeeb nkab thiab kub siab conveying yeeb nkab ntawm thermal fais fab kev lag luam. Piv txwv li, cov nozzles ntawm cov hlawv hauv thermal fais fab nroj tsuag yog ua los ntawm silicon carbide, thiab cov khoom muaj cov yam ntxwv ntawm kev kub siab tiv taus thiab hnav-resistant. Cov txheej txheem sintering ntawm silicon carbide ceramics suav nrog reaction sintering thiab pressureless sintering. Tus nqi ntawm reaction sintering yog qis, cov khoom yog qhov ntxhib, thiab qhov ceev ntawm cov khoom pressureless nqus tsev sintering yog qhov siab. Qhov nyuaj ntawm cov khoom zoo ib yam li cov khoom alumina, tab sis nws tus nqi yog siab dua.
Qhov tsis kam ntawm cov khoom siv zirconia ceramic zoo dua li cov khoom siv brittle. Tus nqi lag luam tam sim no ntawm zirconia hmoov yog kim heev, uas feem ntau yog siv rau hauv cov teb high-end, xws li cov ntaub ntawv kho hniav, pob txha dag, cov khoom siv kho mob, thiab lwm yam.
Lub sijhawm tshaj tawm: Lub Kaum Hli-03-2020