A study was made of thermotransport in commercially pure samples by using thermal gradients of 150C/cm, between 300 and 600C, and analyzing the H concentrations of slices of the specimen by using vacuum extraction techniques. A plot of H concentration versus reciprocal temperature yielded heats of transport of 7.8, 7.7 and 6.7kcal/mol. The variation in this parameter was attributed to the effect of differing initial H concentrations and to the time required to attain the steady state.

Heat of Transport in Thermal Diffusion of Hydrogen in Titanium. M.Kitada, S.Koda: Scripta Metallurgica, 1969, 3[8], 583-4