<報文>TiO_<1±x>の中性子照射による格子定数および密度の変化

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At the composition at the vicinity of TiO_<1.00> of the NaCl-type crystal structure, the vacancies are distributed randomly on the cells of the titanium sublattice and oxygen sublattice. In order to study the effect of the neutron irradiation for the NaCl-type titanium monooxides, the lattice parameter and density were measured, and the differential thermal analysis was performed on the samples which have been neutron irradiated and unirradiated (TiO_<0.942>, TiO_<0.999> and TiO_<1.175>). The results are summarized as follows : (1) The lattice parameter contracted by 0.9% for TiO_<0.942> and 0.2% for TiO_<0.999>, but it expanded by 0.4% for TiO_<1.175> by the neutron irradiation. From these results, it may be considered that the rate of change of the lattice parameter, (α-α_0)/α_0,changes along with a linear relation from "minus" to "plus" with the increase of O/Ti. (2) The density decreases by the neutron irradiation for TiO_<0.942>, TiO_<0.999> and TiO_<1.175>. The rate of change of density increases with the increase of O/Ti. (3) The concentration of the vacant lattice sites in the titanium and oxygen sublattices and the concentration of the total vacant lattice sites in the total lattice increase by the neutron irradiation. (4) In the measurement of the differential thermal analysis conducted for the neutron irradiated TiO_<0.999>, the two broad peaks were observed in a temperature range from 250 to 800℃. These peaks may indicate that the neutron irradiation damage recovers by a two-step mechanism.
東北大学の論文
1974-09-30

<報文>TiO_<1±x>の中性子照射による格子定数および密度の変化

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