Preprints of Annual Meeting of The Ceramic Society of Japan
Preprints of Fall Meeting of The Ceramic Society of Japan
24th Fall Meeting of The Ceramic Society of Japan
Session ID : 1J27
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Host: The Ceramic Society of Japan

Effect of Ca addition on ionic conductivity of LiSi2N3
*Eiichirou Narimatsu, Yoshinobu Yamamoto, Takashi Takeda, Toshiyuki Nishimura, Naoto Hirosaki, Yoshitaka Minamida, Keiichi Kohama
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Keywords: Lithium, Electrical properties, LiSi2N3, Ion conductivity, Calcium, Doping
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Abstract
Effect of Ca-doping on the ionic conductivity of LiSi2N3 was studied. The compositions of Li1-2xCaxSi2N3 (x=0-0.2) were synthesized by the reaction of Li3N, Si3N4, and Ca3N2 at temperature of 1873K-2073K. Ca was incorporated into the LiSi2N3 host lattice and formed the solid solution, Li1-2xCaxSi2N3. Activation energy for ionic conduction was decreased and ionic conductivity at room temperature was enhanced by Ca doping. At 298K, the ionic conductivity of densified Li1-2xCaxSi2N3 (x=0.075) ceramics achieved 1.6☓10-5Sm-1, almost 4 orders of magnitude higher than that of densified Li1-2xCaxSi2N3(x=0) ceramics (3.1☓10-9Sm-1).
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© The Ceramic Society of Japan 2011
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