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| materials | CTE(ppm/K) | Thermal Conductivity(W/mK) | Electric Conductivity(%IACS) | Densities(g/ cm3) |
| W-Cu Alloy | 6.5-7.2 | 165-180 | 31-35 | 16.1-16.4 |
| Al/SiCp Composites | 4-12 | 120-220 | - | 2.0-3.5 |
| KOVAR Alloy | 6.2-7.2 | 15-22 | - | 8.15-8.19 |
| AIN Ceramic | <6 | 150-200 | - | 2.79-2.83 |