[SI-LIST] Re: Effect of Temperature on Metal Conductivity
- From: "Jendon, Terry" <jendon.t@xxxxxxx>
- To: "'zhang_kun@xxxxxxxxxx'" <zhang_kun@xxxxxxxxxx>, si-list <si-list@xxxxxxxxxxxxx>
- Date: Mon, 22 Nov 2004 13:33:04 -0500
Yes, this is what the basis of how the temperature coefficient of resistance
plays a part in determining the resistance of different metals at a
specified temperature. Refer to the following formula:
R = R(eff)* [1 + alpha * (T - Tref)] where
R = resistance at temperature "T"
R(eff)= resistance at reference temperature Tref (usually at 20 degrees C or
sometimes 0 degrees C)
alpha (constant) = temperature coefficient of resistance of the conductor
metal or material in question
T = temperature of conductor metal or material
Tref = reference temperature that alpha is specified at for the conductor
metal/material
Here's a sample table showing some values for "alpha" at 20 degrees C.
TEMPERATURE COEFFICIENTS OF RESISTANCE, AT 20 DEGREES C
Material Element/Alloy "alpha" per degree Celsius
==========================================================
Nickel -------- Element --------------- 0.005866
Iron ---------- Element --------------- 0.005671
Molybdenum ---- Element --------------- 0.004579
Tungsten ------ Element --------------- 0.004403
Aluminum ------ Element --------------- 0.004308
Copper -------- Element --------------- 0.004041
Silver -------- Element --------------- 0.003819
Platinum ------ Element --------------- 0.003729
Gold ---------- Element --------------- 0.003715
Zinc ---------- Element --------------- 0.003847
Hope this helps...
Regards,
Terry Jendon
Project Engineer
LXE, Inc.
125 Technology Parkway
Norcross, GA 30092
Tel: 770-447-4224 x3216
Fax: 770-447-6928
E-Mail: jendon_t@xxxxxxx
-----Original Message-----
From: Zhangkun [mailto:zhang_kun@xxxxxxxxxx]
Sent: Monday, November 22, 2004 1:00 AM
To: si-list
Subject: [SI-LIST] Effect of Temperature on Metal Conductivity
Dear All
Is there any effect of temperature on metal conductivity? In another word,
does the resistance of metal change with the temperature? How much?
Best Regards
Zhangkun
2004.11.22
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