Electronics Engineering

Which metals are the most conductive?

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Answered 2011-04-07 12:23:31

Silver: best

Copper: 9% less conductive than silver

Aluminium is 10% less conductive than copper

Gold: 24% less conductive than copper (but doesn't tarnish or corrode)

Brass is somewhere here.

Rhodium: 74% less conductive than copper

Iridium: 77% less conductive than copper

Platinum: 84% less conductive than copper

Titanium: Over 99% less conductive than copper

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This table shows the resistivity, conductivity and temperature coefficient of various materials at 20 °C (68 °F) Materialρ [Ω·m] at 20 °Cσ [S/m] at 20 °CTemperature

coefficient[note 1]

[K−1]ReferenceSilver1.59×10−86.30×1070.0038[1][2]Copper1.68×10−85.96 × 1070.0039[2]Annealed Copper[note 2]

5.80 × 107

[citation needed]Gold[note 3]2.44×10−84.52 × 1070.0034[1]Aluminium[note 4]2.82×10−83.5 × 1070.0039[1]Calcium3.36x10−8


















0.0009[4]Nichrome[note 5]1.10×10−6

0.0004[1]Carbon (amorphous)5-8×10−4

−0.0005[1][6]Carbon (graphite)[note 6]2.5-5.0×10−6 ⊥ basal plane

3.0×10−3 // basal plane

[7]Carbon (diamond)[note 7]~1012

[8]Germanium[note 7]4.6×10−1

−0.048[1][2]Sea water[note 8]2×10−14.8

[9]Drinking water[note 9]

0.0005 to 0.05

[citation needed]Deionized water[note 10]

5.5 × 10−6

[10]Silicon[note 7]6.40×102

−0.075[1]Glass1010 to 1014

?[1][2]Hard rubberapprox. 1013



3 to 8 × 10−15



Quartz (fused)7.5×1017



Teflon1022 to 1024


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