Department of Applied Chemistry, School of Advanced Engineering, Kogakuin University, 2665-1 Nakano, Hachioji-shi, Tokyo 192-0015, Japan
Adv. Mater. Lett., 2019, 10 (2), pp 85-90
Publication Date (Web): Dec 19, 2018
Copyright © IAAM-VBRI Press
This review article describes a series of studies on the glass-ceramic Na+ superionic conductors with Na5YSi4O12 (N5)-type structure synthesized using the composition formula of Na3+3x-yR1-xPySi3-yO9 for a variety of rare earth elements, R, under the appropriate composition parameters. Recent researches on structural control of the Na+ superionic conducting glass-ceramics are also introduced. The optimum conditions for crystallization were discussed with reference to the conduction properties and the preparation of crack-free N5-type glass-ceramics. The effects of Si substitution with the various elements with tetrahedral oxygen coordination structure and Y substitution with the various R elements were also discussed on ionic conductivity of N5-type glass-ceramics, respectively.
Superionic conductor, glass-ceramics, crystallization, Na5YSi4O12-type, microstructure.