Research Article
Influence of Crucible Thermal Conductivity on Crystal Growth in an Industrial Directional Solidification Process for Silicon Ingots
Table 1
Thermophysical properties of materials.
| | Material | Variable | Value |
| | Quartz | Density (kg/m3) | 1930 | | Specific heat (J/kg⋅K) | 1059 | | Thermal conductivity (W/m⋅K) | 2–6 | | Emissivity | 0.6 |
| | Graphite | Density (kg/m3) | 1790 | | Specific heat (J/kg⋅K) | 1800 | | Thermal conductivity (W/m⋅K) | 140 | | Emissivity | 0.8 |
| | Carbon felt | Density (kg/m3) | 160 | | Specific heat (J/kg⋅K) | | | Thermal conductivity (W/m⋅K) | | | Emissivity | 0.8 |
| | Stainless steel | Density (kg/m3) | 7900 | | Specific heat (J/kg⋅K) | 477 | | Thermal conductivity (W/m⋅K) | 15 | | Emissivity | 0.22 |
| | Silicon | Density (kg/m3) | 2450 | | Specific heat (J/kg⋅K) | 1059 (<1685 K), 1000 (>1685 K) | | Thermal conductivity (W/m⋅K) | 24 (<1685 K), 64 (>1685 K) | | Dynamic viscosity (kg/m⋅s) | 7 × 10−4 | | Thermal expansion coefficient (1/K) | 1.4 × 10−4 | | Latent heat (J/kg) | 1.4 × 106 | | Melting point (K) | 1685 |
| | Argon | Specific heat (J/kg⋅K) | 521 | | Thermal conductivity (W/m⋅K) | | | Dynamic viscosity (kg/m⋅s) | |
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