Environmental Engineering Reference
In-Depth Information
1.05
Co
Ni
0.98
1.05
W
Re
0.98
0.9
1.0
1.1
0.8
0.9
1.0
1.1
T
/
T
m
Figure 10a. Comparison of
γ
lv0
(
T
)/
γ
lv0
(
T
m
) function between the predictions of Eq. (5.6-b) (the solid
line), Eq. (5.3) (the two-point segment) and available experimental data for transition metals Ni (
!
), Co
(
8
), Re (
ψ
) and W (
−
) [168,193-195].
Na
0.8
K
0.8
Rb
0.8
Cs
0.8
0.8
1.6
2.4
3.2
T
/
T
m
Figure 10b. Comparison of
γ
lv0
(
T
)/
γ
lv0
(
T
m
) function between the predictions of Eq. (5.6-b) (the solid
line) and available experimental results for non-transition alkali metals Na (
∀
), K (
,
), Rb (
7
) and Cs (
Λ
)
[196-197].
Substituting the expression ρ
L
(
T
) = ρ
L
(
T
m
)+(dρ
L
/d
T
)(
T
-
T
m
) into Eq. (5.6-b), there is
3
2
/
⎡
′
⎤
⎡
⎤
m
H
−
TS
1
+
u
(
T
−
T
)
with
u
= (
d
ρ
L
/
dT
)/ρ
L
(
T
m
). Since (
d
ρ
L
/
dT
)/ρ
L
(
T
m
) is
γ
(
T
)
=
v
m
⎣
⎦
⎣
⎦
lv
0
1
/
3
λ
N
M
/
ρ
(
T
)
a
L
m
nearly a constant being equal to -10
-4
K
-1
[171,176], while (
T
-
T
m
) values concerned in figure
10 are smaller than 800 K,
u
(
T
-
T
m
) is smaller than 0.1. Considering the mathematical relation
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