Effect of microstructure on Na/+/ diffusion in beta aluminaThe 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.
Document ID
19780033551
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Sarian, S. (Washington Univ. Seattle, WA, United States)
Dunbar, B. J. (Washington Univ. Seattle, WA, United States)
Mcentee, W. J. (Washington, University Seattle, Wash., United States)