Abstract

Lithium ion conductivity in solid solutions of Li 7 Ta 1- x Nb x O 6, Li 7 Ta 1- x Bi x O 6, Li 7+ x Ta 1- x Zr x O 6 and Li 7-2 x Ca x TaO 6 has been measured as a function of temperature and composition using the complex impedance method. At 200°C the conductivities of Li 7 Ta 0.7 Nb 0.3 O 6, Li 7.4 Ta 0.6 Zr 0.4 O 6 and Li 6.6 Ca 0.2 TaO 6 are 4.3 × 10 -4( ωcm) -1, 3.0 × 10 -4( ωcm) -1, 4.0 × 10 -4( ωcm) -1 and 1.6 × 10 -4( ωcm) -1 respectively. The results are discussed in relation to structural properties.

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