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Room-Temperature Synthesis and Electrical Properties of La, Nd and Gd Apatite-type Silicates

  • Antonio F. Fuentes (a1), Luis G. Martinez-Gonzalez (a2), Karla J. Moreno (a3), Evelyn Rodriguez-Reyna (a4) and Ulises Amador (a5)...

Abstract

We show in this paper the possibility of using mechanical milling to prepare apatite-type La, Nd and Gd silicates starting from stoichiometric mixtures of the constituent oxides. XRD patterns collected after grinding the starting mixtures for 9 hours contain only the characteristic reflections of the target materials with no other phase apparently present. Electrical conductivity data were successfully fitted to a Jonscher-type empirical expression with fractional exponent n included in the 0.35-0.75 range. Activation energies for oxygen migration were found to decrease as the size of the rare-earth cation increases. Therefore, the highest conductivity values were found for the apatite-type lanthanum silicate.

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Keywords

Room-Temperature Synthesis and Electrical Properties of La, Nd and Gd Apatite-type Silicates

  • Antonio F. Fuentes (a1), Luis G. Martinez-Gonzalez (a2), Karla J. Moreno (a3), Evelyn Rodriguez-Reyna (a4) and Ulises Amador (a5)...

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