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fdtou-curs-09 - Cadre Didactice

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2/14/2003<br />

COEFICIENTUL DE<br />

CONDUCTIVITATE TERMICĂ<br />

o Conductivitatea termică a materialelor solide<br />

– λ pentru solide are valori foarte diferite,<br />

funcţie de natura şi proprietăţile mat.<br />

– Funcţie de valoarea λ, solidele se împart în:<br />

• materiale izolante λ = 0,02 – 0,12 W.m -1 .K -1<br />

• materiale refractare λ = 0,60 – 3,50 W.m -1 .K -1<br />

• materiale metalice λ = 8,70 – 458 W.m -1 .K -1<br />

LUCIAN GAVRILĂ – Fenomene de transfer II<br />

10

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