1+ x Zr 2Si x P 3? x O 12 by the addition of Na 3BO 3]]>

摘要

AbstractNa1+xZr2SixP3?xO12(NASICON)-based solid electrolytes were prepared by liquid phase sintering with a Na3BO3additive to lower the NASICON sintering temperature. NASICON was sintered at 700°C with 9.1wt% Na3BO3. The obtained NASICON ceramic exhibited high room-temperature conductivity of 1×10?4Scm?1, which were three orders of magnitude higher than that of a Na3BO3-free sample. SEM observation of this ceramic revealed that neck growth among NASICON grains proceeded reasonably and that sodium borates segregated in particulate form without full penetration to NASICON grain boundaries. This characteristic microstructure is expected to contribute to the high conductivity of the NASICON-Na3BO3ceramic.Graphical abstractRelationship between room-temperature ionic conductivities and sintering temperatures for Na1+xZr2SixP3?xO12(NASICON) ceramics. In this study, NASICON ceramic with 9.1wt% Na3BO3was prepared by liquid phase sintering at 700°C. The obtained ceramic exhibited three order of magnitude higher conductivity of 1×10?4Scm?1than that of the Na3BO3free ceramic. The Na3BO3additive can reduce the NASICON sintering temperature by 200–300°C.Display Omitted]]>