Micromeritics ASAP 2460, Operator'S Manual

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Appendix C ASAP 2460 Operator’s Manual
C-44 246-42800-01 - Aug 2013
Thickness Curve Calculations
For each point designated, the following parameters are used in thickness curve calculations:
C
1
= parameter #1
C
2
= parameter #2
C
3
= parameter #3
P
rel,i
= relative pressure for the i
th
point (mmHg)
t
i
= thickness for i
th
point
Kruk-Jaroniec-Sayari
Halsey
(Halsey
5
)
Harkins and Jura
(Harkins and Jura
6
)
Broekoff-de Boer
Carbon Black STSA
t
C
1
C
2
P
rel i

 
log –
--------------------------------------
 
 
C
3
=
t
i
C
1
C
2
P
rel i

 
ln
-----------------------
C
3
=
t
i
C
1
C
2
P
rel i

 
log –
--------------------------------------
C
3
=
P
rel i

 
log
C
1
t
2
i

--------
C
2
c
3
t
i
 
exp + =
t
i
C
1
P
rel i

 
2
C
2
P
rel i

 
C
3
+ + =