理解する Thermal Conductivity
How Heat Moves
Learn About Heat TransferThermal conductivity measures how readily heat passes through a material. High conductivity means heat flows easily; low conductivity means the material insulates. This property is crucial for everything from cooking pans to building insulation.
Material Conductivity Values
| Material | k (W/m·K) | Classification |
|---|---|---|
| Copper | 385-400 | Excellent conductor |
| Aluminum | 205-250 | Good conductor |
| Steel | 50 | Moderate conductor |
| Glass | 0.8-1.0 | Poor conductor |
| Wood | 0.1-0.2 | Insulator |
| Fiberglass | 0.04 | Good insulator |
| Air (still) | 0.026 | Excellent insulator |
まとめ
Thermal conductivity varies by 10,000× across common materials. Metals conduct heat quickly due to free electrons; insulators trap air to slow heat transfer. 理解する these values guides material selection for heat sinks, insulation, cookware, and countless applications.