Chimica Techno Acta (May 2020)

Synthesis, structure and electrical properties of Li+-doped pyrochlore Gd2Zr2O7

  • Irina A. Anokhina,
  • Irina E. Animitsa,
  • Anastasia F. Buzina,
  • Vladimir I. Voronin,
  • Vladimir B. Vykhodets,
  • Tatyana E. Kurennykh,
  • Yuri P. Zaikov

DOI
https://doi.org/10.15826/chimtech.2020.7.2.02
Journal volume & issue
Vol. 7, no. 2
pp. 51 – 60

Abstract

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The pyrochlore Gd1.55Li0.45Zr2O6.55 was prepared by the solution and solid-state methods. The introduction of lithium in the Gd-sublattice led to decrease in the lattice parameter a = 10.4830(8) Å in comparison with Gd2Zr2O7 (a =10.5346(2) Å). Monitoring of the lithium content in the sample during heat treatments showed a loss of lithium at temperatures above 1100 °C, so, to maintain the stoichiometry of lithium the low temperature sintering methods are required. The sample Gd1.55Li0.45Zr2O6.55 exhibited a predominant oxygen-ion transport over a wide range of temperatures. Although doping did not lead to an increase in the oxygen-ion conductivity compared to Gd2Zr2O7, it caused the suppression of the hole conductivity.

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