Microstructure and elastic modulus of ceramic Li (x) Na1-x NbO3 perovskite solid solutions prepared at 6 GPa

resumo

The microstructure of ceramic samples of high-pressure ferroelectric Li (x) Na1 - x NbO3 (x = 0.17, 0.25) perovskite solid solutions has been studied in relation to synthesis temperature and composition. The elastic properties (Young's modulus) of the high-pressure Li (x) Na1 - x NbO3 (x = 0.125, 0.17, 0.25) solid solutions have been studied for the first time by a contact technique. The results demonstrate that, with increasing sintering temperature, the Young's modulus of the high-pressure Li (x) Na1 - x NbO3 solid solutions at singular concentration points (x (i) = 0.125 and 0.25, Li/Na = 1/7 and 1/3) increases considerably, whereas that of Li0.17Na0.83NbO3 decreases markedly, which seems to be related to the recrystallization behavior of ordered and disordered solid solutions at high pressures.

categoria

Materials Science

autores

Palatnikov, MN; Shcherbina, OB; Efremov, VV; Sidorov, NV; Salak, AN

nossos autores

agradecimentos

This work was supported by the Russian Foundation for Basic Research, grant no. 09-03-00141-a.

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