Li-Doped LaCrO<sub>3</sub> Ceramics

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  • Liを添加したLaCrO<sub>3</sub>セラミックス
  • Li オ テンカシタ LaCrO3 セラミックス

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Abstract

Li-doped LaCrO3 ceramics were prepared in air at 1600°C and a perovskite solid solution with 5% Li-substituted in the Cr site was obtained. The Li doping promoted the densification of LaCrO3, resulting in dense ceramics of 98% theoretical density. The Li doping decreased the electrical resistivity, implying the creation of holes. The resistivity of Li-doped LaCrO3, however, was higher than those of Sr- and Zn-doped LaCrO3, which had lower relative densities. The densification mechanism of LaCrO3 was discussed based on equilibrium of point defects, and the volume diffusion of oxygen ions was considered to be the rate-limiting process for the densification.

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