Hunting Sodium Dendrites in NASICON-Based Solid-State ...
In a typical preparation, under a stoichiometric ratio, Na 2 CO 3, ZrO 2, SiO 2 and NH 4 H 2 PO 4 were ball-milled in a planetary ball mill (PM 400, Retsch) at 400 rpm for 12 h. As-obtained mixture was sintered at 1000°C for 10 h in air. The as-sintered product was further ball-milled under the same conditions as described above.