Synthese,etude cristallochimique et conductivite ionique de quelques aluminosilicates de lithium de type spodument β (LiAlSi2O6) |
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| Authors: | A. Ziadi J.P. Mercurio B. Frit |
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| Abstract: | Solid solutions Li1+xAl1+xSi2?xO6, Li1?xAl1?xSi2+xO6, Li1?xAlSi2?xMxO6 (M = P, V) all of the β-spodumene type, have been synthesised and the limits of their homogeneity ranges established. The ionic conductivity of sintered ceramics has been measured between 200 and 600°C by the complex impedance method. Its observed evolution (increase and then decrease with increasing substitution rates) is discussed in terms of a compensation mechanism between the relative evolution of the numbers of respectively charge carriers and empty sites. Influence of sintering process on conductivity has been shown by comparison of naturally sintered, hot-pressed and glassy samples. |
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| Keywords: | To whom all correspondence is to be addressed. |
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