(1)
Lithium zirconate (Li2ZrO3) is a candidate tritium breeding material for a D-T fusion power plant blanket.
DATA AND CORRELATIONS
The thermal and physical properties of lithium zirconate are from refs [1, 2]. Correlations of the thermal and structural properties as functions of temperature are as follows:
(1)
(2)
(3)
(4)
with p the porosity and all temperatures in degrees K. These equations are valid in the temperature range of 300-1100 K. The coefficient b in Eq 2 is assumed to be the same as that for lithium oxide.
Figures 1-2 show the variation of properties with temperature and Figs 3-4 show the effect of porosity on the thermal conductivity and elastic modulus.
TABLE 1 Thermal and Structural Properties of lithium zirconate
T K [[rho]] E GPa [[nu]] k W/m-K c J/kg-K [[sigma]]y [[alpha]]
kg/m3 MPa (10-6)
m/m-K
300 4150.0 159.798 3.246 93.697 9.927
350 158.358 2.928 109.278 9.938
400 156.918 2.690 124.864 9.949
450 155.478 2.504 140.453 9.960
500 154.038 2.356 156.043 9.972
550 152.598 2.234 171.635 9.983
600 151.158 2.133 187.228 9.994
650 149.718 2.047 202.821 10.005
700 148.278 1.974 218.414 10.016
750 146.838 1.910 234.008 10.028
800 145.398 1.855 249.602 10.039
850 143.958 1.805 265.196 10.050
900 142.518 1.762 280.790 10.061
950 141.078 1.723 296.385 10.072
1000 139.638 1.688 311.979 10.084
1050 138.198 1.656 327.574 10.095
1100 136.758 1.627 343.168 10.106
1150 135.318 1.600 358.763 10.117
1200 133.878 1.576 374.358 10.128
k (W/m-K) c (J/kg-K)
Temperature (K)
Figure 1 : Thermal conductivity and specific heat of lithium zirconate.
E (GPa) [[alpha]] (10-6 m/m-K)
Temperature (K)
Figure 2: Elastic modulus and thermal expansion coefficient of lithium zirconate.
Temperature (K)
Figure 3 : The effect of porosity on the thermal conductivity of lithium zirconate.
E (GPa)
Temperature (K)
Figure 4 : The effect of porosity on the elastic modulus of lithium zirconate.