10 New Na + Superionic Conductor Narpsio Glass-Ceramics
397
Fig. 10.10 Arrhenius plots
of the conductivities of grains
(G), grain boundaries (GB)
and the total bulk (T) of the
glass-ceramic
Na 3.9 Y 0.6 P 0.3 Si 2.7 O 9 (A) and
Na 3.9 P 0.3 Sm 0.6 Si 2.7 O 9 (B)
[30]. Reprinted by permission
from Springer Nature:
Springer J. Electroceram. 24
(2010) 83, COPYRIGHT
(2010)
-6
-4
-2
2
4
0
6
-2
1.6
1.8
2.0
2.2
2.4
1000/T (K -1 )
lnsT (SK/cm)
0
2
4
6
B
A
T
G
GB
T
G
GB
Table 10.2 Conduction properties of various Narpsio glass-ceramics with composition
Na 3.9 R 0.6 Si 2.7 O 9 [30]
R 3+ (ions)
Ea kJ•mol −1
Conductivity (σ 300 ) S•cm −1
Crystalline phase
Sc
35.3
3.2 × 10 −3
N5-type + unknown
In
39.8
3.1 × 10 −3
N5-type + unknown
Er
26.9
3.6 × 10 −2
N5-type
Y
26.6
6.6 × 10 −2
N5-type
Gd
23.0
1.3 × 10 −1
N5-type
Eu
24.4
5.2 × 10 −2
N5-type
Sm
20.9
6.3 × 10 −2
N5-type
Nd
55.1
2.2 × 10 −5
Unknown
La
57.8
1.6 × 10 −4
Unknown
Reprinted by permission from Springer Nature: Springer J. Electroceram. 24 (2010) 83, COPYRIGHT (2010)