October 2018
Intermediate to advanced
544 pages
16h 42m
English
Appendix A: Material and Physical Constants
A.1 Common Material Constants
TABLE A.1
Approximate Conductivity at 20°C
Material |
Conductivity (S/m) |
1. Conductors |
|
Silver |
6.3 × 107 |
Copper (standard annealed) |
5.8 × 107 |
Gold |
4.5 × 107 |
Aluminum |
3.5 × 107 |
Tungsten |
1.8 × 107 |
Zinc |
1.7 × 107 |
Brass |
1.1 × 107 |
Iron (pure) |
107 |
Lead |
5 × 107 |
Mercury |
106 |
Carbon |
3 × 107 |
Water (sea) |
4.8 |
2. Semiconductors |
|
Germanium (pure) |
2.2 |
Silicon (pure) |
4.4 × 10–4 |
3. Insulators |
|
Water (distilled) |
10–4 |
Earth (dry) |
10–5 |
Bakelite |
10–10 |
Paper |
10–11 |
Glass |
10–12 |
Porcelain |
10–12 |
Mica |
10–15 |
Paraffin |
10–15 |
Rubber (hard) |
10–15 |
Quartz (fused) |
10–17 |
Wax |
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