Exercises
219
Data
Material
TiS 2
LiTiS 2
a A c
6 @
3.407
3.455
c A c
6 @
5.697
6.195
Exercise 5.6 – Chlorine sensor based on doped strontium chloride
A – Study of strontium chloride SrCl 2
Figure 85 shows the conductivity in Arrhenius coordinates of pure SrCl 2 and
of SrCl 2 doped by KCl.
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Figure 85 – Conductivity in Arrhenius coordinates of
(a) pure SrCl 2 and (b) SrCl 2 doped with potassium chloride KCl.
1. Given that the dominant disorder is anionic Frenkel disorder,
a. Write the equilibrium for structure defects involved and the associated
equilibrium constant K AF . The expression for this constant as a function
of temperature is
K
e
9 10
AF
4
.
k T
eV
1 6
#
=
− −
b. Identify the various temperature domains that appear in figure 85(a).