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 Can anyone suggest how to fit Avrami equation		  New Topic  Reply to Topic
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imam

Germany
1 Posts
Posted - 02/02/2010 :  12:20:21 PM  Show Profile  Edit Topic  Reply with Quote  View user's IP address  Delete Topic
I an having problems in fitting avrami equation. Please give me some deatils to fit avrami equation.
1. ln [-ln(1-Xt)]=lnZt+nlnt
2. ln [-ln(1-Xt)]=lnKt-mlnf

imamkhasim

larry_lan

China
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Posted - 02/03/2010 :  03:07:04 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
The Origin Nonlinear Fitting doesn't support implicit functions.

Thanks
Larry
Originlab Technical Services
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neutrondude

Brunei
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Posted - 02/17/2010 :  08:10:20 AM  Show Profile  Edit Reply  Reply with Quote  View user's IP address  Delete Reply
Why dont you rewrite the Avrami equation in a proper form ...

y = 1- exp(- pow(k*(x-t0),n); in Origin C - x = time, where t0 is the delay, k rate, n exponent..


or in a standard Origin way

y = 1- exp(-(k*x)^n) then remember to chose user defined parameters and define them
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