Phase Change Materials: metal
Phase change material (PCM) properties — melting point, latent heat, density, thermal conductivity, specific heat, and cycle life for paraffins, salt hydrates, fatty acids, and eutectics
| pcm category | material id | chemical formula | latent heat kJ kg (kJ/kg) | material name | max cycles | melting point C (C) | notes | phase change type | specific heat liquid kJ kgK (kJ/kgK) | specific heat solid kJ kgK (kJ/kgK) | thermal conductivity liquid W mK (W/mK) | thermal conductivity solid W mK (W/mK) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| metal | bi58sn42_eutectic | Bi0.58Sn0.42 | 44.8 | Bismuth-Tin Eutectic (Bi58Sn42) | 5,000 | 138 | Lead-free eutectic solder alloy; eutectic Tm=138°C (no melt range); low cost; used as medium-temperature metallic PCM for TES and solder. Higher density and conductivity than organics or salt hydrates at 138°C range. | solid-liquid | 0.21 | 0.17 | 17.9 | 19 |
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