20°C (68°F)时的电阻率和温度系数

材料电阻率
ρ (Ω·m)
温度 系数
α (per °C)
电导率
σ (S/m)

(石墨烯)
1.0x10-8-0.00021.0x108
1.59x10-80.0038196.29x107
1.68x10-80.00395.95x107
2.44x10-80.00344.10x107
2.82x10-80.00393.5x107
3.36x10-80.00412.98x107
钨丝5.6x10-80.00451.79x107
5.9x10-80.00371.69x107
6.99x10-80.00601.43x107
9.28x10-80.00601.08x107
9.71x10-80.0056711.03x107
1.06x10-70.0039279.43x106
1.09x10-70.00459.17x106
1.40x10-70.0047.10x106
2.2x10-70.00394.55x106
4.2x10-7...2.38x106
锰铜4.82x10-70.0000022.07x106
康铜4.9x10-70.0000082.04x106
不锈钢6.90x10-70.000941.45x106
9.8x10-70.00091.02x106
镍铬
(镍,铁,铬)
1x10-60.00041x106
铬铝钴耐热钢
(铁,铬,铝)
1.2-1.5x10-6.........

(石墨)
3-60x10-5-0.0005......

(无定形)
5-8x10-4-0.00051.25-2x103
4.60x10-1-0.0482.17x100
海水2.00x10-1...4.8x100
0.1-60...-0.075.....
玻璃1-104x109.........
硬胶1-100x1013...1x10-14
空气1.3-3.3x1016...3-8x10-15
石英(熔融)7.5x1017...1.3x10-18
聚对苯二甲酸乙二醇酯10x1020...1x10-21

Ω=V/A
S=Ω-1=A/V

电阻率和电导率:
ρ=1/σ
ρ=R·A/l

温度系数:
R(T)=R(T0)(1+α·ΔT)