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VK2ZRG > TECH 28.05.06 05:25l 49 Lines 2583 Bytes #999 (0) @ WW
BID : 2349_VK2ZRG
Read: DL1LCA GUEST
Subj: Resistivities of metals
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Sent: 060528/0322Z @:VK2WI.#SYD.NSW.AUS.OC #:15815 [SYDNEY] FBB7 $:2349_VK2ZRG
From: VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
To : TECH@WW
VK2ZRG/TPK 1.83d Msg #:2349 Date:28-05-06 Time:3:23Z
Hello All,
On further reading of the Encyclopaedia Britannica I've found a table of
resistivity and temperature coefficient for 41 metals. The values in the
table were at zero degrees Celsius. I made a little programme to do the maths
for resistivity at 20 degrees Celsius. The value for chromium in this table
is different from the value given in the article on chromium in another part
of the encyclopeadia. There the value was 13 micro ohms-cm. I've double
checked the numbers in the table and I don't think I've made any errors in
transcribing them.
Resistivity Temp C Resistivity Temp C
Metal in micro ê-cm coeff. Metal in micro ê-cm coeff.
names 0øC 20øC * 1E-3 names 0øC 20øC * 1E-3
Aluminium 2.5 2.7 4.67 Molybdenum 5.03 5.50 4.70
Antimony 32.1 35.4 5.10 Mercury 21.2 .... ....
Arsenic 26.0 .... .... Nickel 6.58 7.47 6.75
Barium 36.0 40.4 6.10 Palladium 9.77 10.51 3.80
Beryllium 2.78 3.20 7.50 Platinum 9.81 10.58 3.92
Bismuth 107.0 117.0 4.45 Potassium 6.3 7.0 5.40
Cadmium 6.73 7.30 4.26 Rhenium 18.9 20.1 3.10
Calcium 3.6 3.9 4.00 Rhodium 4.33 4.73 4.57
Cesium 19.0 20.9 5.00 Rubidium 11.6 12.8 5.30
Chromium 15.0 .... .... Silver 1.50 1.62 4.10
Cobalt 5.2 5.9 6.58 Sodium 4.27 4.74 5.50
Copper 1.55 1.68 4.33 Strontium 20.0 22.0 5.00
Gadolinium 140.0 149.7 3.45 Tantalum 12.4 13.3 3.60
Gallium 13.7 14.8 4.10 Thorium 19.1 20.4 3.30
Gold 2.04 2.20 3.98 Tin 10.1 11.0 4.63
Indium 8.2 9.0 5.10 Tungsten 4.89 5.36 4.83
Iridium 4.74 5.15 4.33 Uranium 25.0 .... ....
Iron 8.71 9.85 6.57 Vanadium 18.2 .... ....
Lead 19.3 20.9 4.22 Zinc 5.45 5.91 4.20
Lithium 8.5 9.2 4.37 Zirconium 40.5 43.7 4.00
Magnesium 3.94 4.27 4.20
73s from Ralph VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
Taglines by Colin Coker G4FCN
C Program run, C Program Crash...ReWrite in Pascal!
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