Thermal Conductivity Classification (Industrial Standard Classification, Based on λ Value)
1. Thermal insulation materials (low thermal conductivity, providing insulation/heat resistance)
|
Thermal conductivity λ (W/mK) |
Level Definition |
Representative Materials |
|
＜0.05 |
Superinsulation |
Aerogel, high-end silicone foam insulation board, rock wool |
|
0.05~0.15 |
Conventional insulation |
Standard silicone foam board, EVA foam, PU sponge |
|
0.15~0.3 |
Poor thermal insulation / Low thermal conductivity |
Solid ordinary silicone, rubber, plastic |
2. Thermal interface materials (for heat dissipation, high thermal conductivity)
|
Thermal conductivity λ (W/mK) |
Industry Level Designation |
Applicable product (thermal conductive silicone foam) |
|
0.8~1.5 |
Entry-level thermal conductivity |
Economical thermal conductive foam silicone pad for low-end power supply cooling |
|
1.5~3.0 |
Medium thermal conductivity |
Main circulating funds commonly used for energy storage and battery modules |
|
3.0~5.0 |
High thermal conductivity |
High-power inverters; power batteries for new energy vehicles |
|
5.0~12.0 |
ultra-high thermal conductivity |
High-end industrial control systems, fast-charging devices, and photovoltaic power components |