Effect of the isotopic composition of lithium carriers on the ionic conductivity of lanthanum lithium titanate ceramic

The ionic conductivity of the solid electrolyte La^sub 2/3 - x^Li^sub 3x^TiO^sub 3^ 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....

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Published inGlass and ceramics Vol. 64; no. 7-8; pp. 251 - 254
Main Authors Surin, A A, Khrebtov, A V, Obrosov, V P, Stepanov, A P, Surikov, V T
Format Journal Article
LanguageEnglish
Published New York Springer Nature B.V 01.07.2007
Subjects
Activation energy
Carriers
Ceramics
Composition effects
Current carriers
Ionic conductivity
Isotopes
Lithium
Spin-lattice relaxation
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Summary:The ionic conductivity of the solid electrolyte La^sub 2/3 - x^Li^sub 3x^TiO^sub 3^ 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 ^sup 7^Li 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.[PUBLICATION ABSTRACT]
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ISSN:0361-7610
1573-8515
DOI:10.1007/s10717-007-0063-y