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The Influences of Excess Sodium on Low‐Temperature Na SICON Synthesis
Author(s) -
Bell Nelson S.,
Edney Cynthia,
Wheeler Jill S.,
Ingersoll David,
Spoerke Erik D.
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13167
Subject(s) - sodium , alkoxide , sodium silicate , sol gel , chemistry , sodium phosphates , cubic zirconia , inorganic chemistry , phase (matter) , phosphate , chemical engineering , materials science , nanotechnology , ceramic , catalysis , metallurgy , organic chemistry , engineering
Controlling the materials chemistry of the solid‐state ion conductor Na SICON is key to realizing its potential utility in emerging sodium‐based battery technologies. We describe here the influence of excess sodium on phase evolution of sol‐gel synthesized Na SICON . Alkoxide‐based sol‐gel processing was used to produce powders of Na 3 Zr 2 PSi 2 O 12 Na SICON with 0‐2 atomic % excess sodium. Phase formation and component volatility were studied as a function of temperature. Na SICON synthesis at temperatures between 900‐1100°C with up to 2% excess sodium significantly reduced the presence of zirconia, sodium phosphate, and sodium silicate secondary phases in fired Na SICON powders. Insights into the role of sodium on the phase chemistry of sol‐gel processed Na SICON may inform key improvements in Na SICON development.