Martensitic alpha reversible gamma Phase Transition and Ionic Conductivity in 'Pure' and Doped LilOs Single Crystals

摘要

The polymorphism and anisotropy of electrical, dielectric, and thermophysical properties of "pure" and doped LiIO_3 single crystals are studied. The hexagonal alpha-LiIO_3 phase is a 1 -D ionic conductor (along the c axis). The anisotropy of the ionic conductivity of the a-phase can be reduced by doping with transitive metals (Fe, Mo, Ni). The martensitic character of the alpha reversible gamma transition is proved. In the gamma-phase, only a slight anisotropy of the conductivity is found. The alpha reversible gamma transition is not an ionic-superionic one.