Abstracts Book - IMRC 2018

• SC1-P004
DEVELOPMENT OF SODIUM SUPERIONIC CONDUCTOR BY GLASS-
CERAMIC ROUTE
Jairo Felipe Ortiz Mosquera 1 , Adriana Marcela Nieto Munoz 1 , Ana Candida Martins Rodrigues 2
1 Universidade Federal de São Carlos, Dema-LaMaV, Brazil. 2 Universidade Federal de São
Carlos, Dema, Brazil.
Solid electrolytes are materials which exhibit high ionic conductivity. In the case
of crystalline inorganic solid electrolytes, structures with interconnected
interstitial spaces (channels or tunnels), through which the ions can move, are
known to favor the ionic conductivity. Compounds with NASICON crystalline
structure present three-dimensional channels and are well known for their high
ionic conductivity, making them suitable for use as solid electrolytes in
electrochemical devices. Many compositions of these materials have been
obtained by the sintering route; however, porosity and grain boundary curtail
their use as solid electrolytes. A possible solution to this problem is to obtain
NASICON glass-ceramics through the controlled crystallization of glasses. The
advantage of the glass-ceramic route is the lower porosity and a better control
of the microstructure, through different heat treatments for the crystallization
of the precursor glass. In view of the importance of NASICON materials, this
study was focused on the preparation of glass-ceramics of the Na1+yGe2SiyP3-yO12
(NGSP) system in order to investigate the influence of silicon content on their
electrical properties. Thermal characterization of NGSP precursor glasses was
carried using differential scanning calorimetry (DSC). The amorphous nature of
the parent glasses was confirmed by X-ray and it was observed the NASICON
phase in all glass-ceramics. In addition, it was seen by impedance spectroscopy
that silicon content helped increase the conductivity in the NGSP system. It was
observed that the grain and grain boundary exhibited similar conductivities.
Keywords: Glass-ceramic, Nasicon, Solid electrolytes
Presenting authors email: felipeortiz980@hotmail.com