| Autor: |
Belous, A. G., Gavrilenko, O. N., Pashkova, E. V., Danil'chenko, K. P., V'yunov, O. I. |
| Předmět: |
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| Zdroj: |
Inorganic Materials; Aug2004, Vol. 40 Issue 8, p867-873, 7p |
| Abstrakt: |
The effects of the nominal composition and synthesis conditions on the lithium nonstoichiometry of La2/3-xLi3x...4/3-2xNb2O6 (I) and La2/3-xLi3x...4/3-2xTa2O6 (II) solid solutions are studied. The results demonstrate that lithium losses can be reduced from 26-30 to 14-15 mol % in system I and from 15 to 4 mol % in system II. It is shown that the disturbance of electroneutrality caused by Li non stoichiometry in the solid solutions is eliminated via the formation of oxygen vacancies in positions O(1) (1f: ½ ½ 0) and O(2) (1h: ½ ½ ½) of the cation-deficient perovskite structure. The optimal lithium ion conductivity is offered by solid solutions with .../3x ... 2.6 and x ... 0.136-0.143. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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