Li2O: T Diffusion

The release of T from neutron-irradiated monocrystalline particles (0.15 to 0.84mm) was measured during isothermal annealing. Diffusion data (table 100) were deduced from the results by considering the time-dependence of diffusion in a solid sphere. The diffusivity of T at temperatures of between 573 and 950K was found to be described by:

D (cm2/s) = 0.116 exp[-101(kJ/mol)/RT]

T.Tanifuji, K.Noda, T.Takahashi, H.Watanabe: Journal of Nuclear Materials, 1987, 149, 227-32

Table 100

Diffusion of T in Li2O Monocrystalline Particles

Temperature (K)	Particle Size (mm)	D (cm2/s)
553	0.150 - 0.297	1.8 x 10-11
563	0.150 - 0.297	3.0 x 10-11
573	0.150 - 0.297	7.2 x 10-11
594	0.150 - 0.297	1.1 x 10-10
598	0.150 - 0.297	1.7 x 10-10
601	0.590 - 0.840	1.6 x 10-10
606	0.297 - 0.590	1.7 x 10-10
613	0.590 - 0.840	2.2 x 10-10
614	0.150 - 0.297	2.4 x 10-10
624	0.590 - 0.840	5.7 x 10-10
626	0.297 - 0.590	4.4 x 10-10
633	0.150 - 0.297	5.3 x 10-10
647	0.297 - 0.590	7.4 x 10-10
653	0.590 - 0.840	1.6 x 10-9
654	0.150 - 0.297	1.1 x 10-9
674	0.590 - 0.840	2.1 x 10-9
675	0.150 - 0.297	2.0 x 10-9
683	0.297 - 0.590	2.9 x 10-9
695	0.150 - 0.297	4.2 x 10-9
701	0.590 - 0.840	4.7 x 10-9
723	0.150 - 0.297	6.7 x 10-9
724	0.590 - 0.840	7.7 x 10-9
730	0.297 - 0.590	1.0 x 10-8
745	0.590 - 0.840	1.2 x 10-8
761	0.590 - 0.840	2.1 x 10-8
773	0.297 - 0.590	1.9 x 10-8
773	0.590 - 0.840	3.1 x 10-8
803	0.297 - 0.590	3.3 x 10-8
806	0.590 - 0.840	3.4 x 10-8
810	0.297 - 0.590	3.7 x 10-8
833	0.590 - 0.840	5.2 x 10-8
858	0.590 - 0.840	8.7 x 10-8
873	0.590 - 0.840	1.1 x 10-7
908	0.590 - 0.840	1.2 x 10-7
933	0.590 - 0.840	2.1 x 10-7
951	0.590 - 0.840	2.4 x 10-7