Exercises
23
appropriate approximations and justifying them. In the intermediate-pressure domain, we treat only the case K e % K AF .
c. Using logarithmic coordinates, draw the corresponding curves (i.e., the
Brouwer diagram).
2. Doped ThO 2
a. Consider ThO 2 doped with YO 1.5 at 5 at%, where the Y
3+
ion occupies the
thorium site. By applying the same reasoning as for question B1c, draw
the Brouwer diagram for doped ThO 2 . Denote by D m the concentration
of extrinsic defects.
b. What changes are caused by the doping?
c. What is the point of this doping?
Data
K AF = 10
–10
K e = 10
–16
K g = 8.10
–30
23
appropriate approximations and justifying them. In the intermediate-pressure domain, we treat only the case K e % K AF .
c. Using logarithmic coordinates, draw the corresponding curves (i.e., the
Brouwer diagram).
2. Doped ThO 2
a. Consider ThO 2 doped with YO 1.5 at 5 at%, where the Y
3+
ion occupies the
thorium site. By applying the same reasoning as for question B1c, draw
the Brouwer diagram for doped ThO 2 . Denote by D m the concentration
of extrinsic defects.
b. What changes are caused by the doping?
c. What is the point of this doping?
Data
K AF = 10
–10
K e = 10
–16
K g = 8.10
–30