[SI-LIST] Re: Effect of Temperature on Metal Conductivity

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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