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[ Last edited by linuxeno on 2009-9-19 at 23:23 ]
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linuxeno

Ìú¸Ëľ³æ (ÕýʽдÊÖ)

thanks for your explanation.

In the original form of the Nernst-Einstein Equation, the unit of c seems that of electron.

However, in this revised equation, which relates the concentration and mobility (diffusion) of the charged species. In some papers, the electrical conductivity can be enhanced by the dissolution of H (proton) into solid materials, and in some papers which I am reading, the unit of c is ppm H and diffusion coefficient is also for H.

I am now trying to calculate the relation between H content, temperature and also electrical conductivity....

However, I always fail to get the right results...

In the paper, for example 100 ppm H, T=1573K, D=2.4E-10 m2/s, the charger carrier caused by H (q=+e) results in a conductivity of 0.01 S/m (A=unit 1).

Can you help me to use the above values for the evaluation?

[ Last edited by linuxeno on 2009-9-20 at 17:18 ]
3Â¥2009-09-20 17:05:01
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bote

the unit of c is C/cm3, but not "ppm". it is

¡ï ¡ï
linuxeno(½ð±Ò+1):лл²ÎÓë
ddx-k(½ð±Ò+1,VIP+0):лл 9-22 19:42
the electron concentration but not the impurity content concentration in a material.

Boltzmann constant: J/K (SI)
charge: C (coulomb)   (SI)

Just sent you a note but not showed up here. Don't know why. inform me of your receiving or not. ths.
Find the absolute concentration of "H" in your sample. That is the quantity entering your expression of conductivity.

absolute concentration=[density of your sample/(mole mass*1.67*10^(-27))]*(relative concentration of H in ppm)
1.67*10^(-27) is the mass of a proton or neutron in the expression.

[ Last edited by bote on 2009-9-21 at 06:34 ]
2Â¥2009-09-20 13:21:32
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bote

read my first post again

read my first post again
4Â¥2009-09-21 06:47:03
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