Kev sib raug zoo ntawm thermal conductivity ntawm cov khoom rwb thaiv tsev yog λ = k / (ρ × c), qhov twg k sawv cev rau cov thermal conductivity ntawm cov khoom, ρ sawv cev rau qhov ceev, thiab c sawv cev rau cov cua sov tshwj xeeb.
1. Lub tswv yim ntawm thermal conductivity
Nyob rau hauv cov ntaub ntawv rwb thaiv tsev, thermal conductivity yog hais txog lub peev xwm ntawm tshav kub ib cheeb tsam nyob rau hauv cov ntaub ntawv los ntawm cov khoom nyob rau hauv ib chav tsev lub sij hawm, uas yog, lub tshav kub hloov pauv tus nqi. Nws feem ntau yog qhia los ntawm cov cua kub hauv ib cheeb tsam ntawm ib chav tsev ib lub sij hawm thaum qhov kub sib txawv yog 1K, thiab chav tsev yog W / (m·K). Qhov loj ntawm thermal conduction nyob ntawm qhov thermal conductivity thiab kub qhov sib txawv ntawm cov khoom.
2. Cov qauv kev suav ntawm thermal conductivity
Cov thermal conductivity ntawm cov khoom rwb thaiv tsev yog cuam tshuam nrog qhov ntom ntom, tshwj xeeb kub thiab thermal conductivity ntawm cov khoom, thiab kev sib raug zoo ntawm lawv yog: λ = k / (ρ × c).
Ntawm lawv, k sawv cev rau cov thermal conductivity ntawm cov khoom, chav tsev yog W / (m·K); ρ sawv cev qhov ceev, chav tsev yog kg / m³; c sawv cev rau qhov tshwj xeeb cua sov, chav tsev yog J / (kg·K). Cov mis no qhia peb tias yog peb xav txo cov thermal conductivity ntawm cov khoom siv rwb thaiv tsev, peb yuav tsum tau txo qhov ceev, tshwj xeeb kub muaj peev xwm thiab thermal conductivity ntawm cov khoom.
3. Yam cuam tshuam rau thermal conductivity
Lub thermal conductivity ntawm cov khoom rwb thaiv tsev yog cuam tshuam los ntawm ntau yam, xws li kub, cov khoom siv ntawm cov khoom siv (xws li cov qauv siv lead ua), tshuaj lom neeg muaj pes tsawg leeg, kev cuam tshuam ntawm cov khoom siv, thiab lwm yam. Tsis tas li ntawd, qhov ntom, dej ntsiab lus, porosity thiab lwm yam tsis zoo ntawm cov khoom siv rwb thaiv tsev kuj tseem cuam tshuam rau thermal conductivity.
Post lub sij hawm: Jan-20-2025
