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Effect of microstructure on Na/+/ diffusion in beta alumina (1977)

Dunbar, B. J. ; Mcentee, W. J. ; Sarian, S.

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Publication Date: 2019-07-13

Description: The effect of microstructural features, such as grain size and orientation, on sodium ion diffusion in polycrystalline beta alumina is investigated; the ionic solid is suitable for use in high-energy and power density batteries. Two types of hot-pressed polycrystalline samples are studied, one with grains highly oriented in the direction normal to the pressing direction, the other with significantly less preferred orientation normal to the pressing direction. Results of the experimental assessments indicate that grain size and diffusion path tortuosity have little effect on diffusion kinetics, while grain boundary type and grain aspect ratio are important factors in determining the diffusion rate.

Keywords: NONMETALLIC MATERIALS

Type: International Materials Symposium; Aug 24, 1976 - Aug 27, 1976; Berkeley, CA

Format: text

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