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