E 27 Влияние изотопного состава литиевых носителей на ионную проводимость керамики из титаната лантана лития [Текст] = The effect of isotope composition of lithium carries on the ion conductivity of ceramics based on lithium lanthanum titanate / А. А. Сурин, А. В. Хребтов, В. П. Обросов, А. П. Степанов, В. Т. Суриков // Стекло и керамика. - 2007. - № 7. - С. 31-34. - Библиогр.: с. 34 (7 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): TITANATE CERAMIC -- LITHIUM Аннотация: The ionic conductivity of the solid electrolyte La2/3 -x Li3x TiO3 at temperatures 20–600°C with different isotopic composition of the lithium current carriers is measured. It is shown that it has two components — low-and high-temperature — with very different activation energies. NMR on 7Li nuclei is used to measure the spin-lattice relaxation rate of the carriers. It is determined that the activation energies of short-and long-range carrier motion are the same at temperatures 20–500°C and are sharply different at higher temperatures. The effect of the concentration of cationic vacancies on the motion of carriers with different isotopic composition is investigated |