Ionic conductivity in solid solutions of the Na/sub 3/YSi/sub 3/O/sub 9/ type

Journal Article · Sat Jun 01 00:00:00 EDT 1985 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2114113· OSTI ID:5262564

Kim, C H; Banks, E; Giu, B

Samples based on the Na/sub 3/MSi/sub 3/O/sub 9/ structure (M = Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu, and Y) were prepared. A combination of phosphorus substitution and reduction of M/sup 3 +/ content permitted increasing sodium content, the maximum sodium content being 3.3. Conductivity of this sample, measured by pulse and two-terminal ac methods, was about 5.5 x 10/sup -4/ (..cap omega..-cm)/sup -1/ at 320/sup 0/C, compared to 9 x 10/sup -6/ (..cap omega..-cm)/sup -1/ for Na/sub 3/YSi/sub 3/O/sub 9/ at the same temperature. Activation energies were slightly lowered with increasing sodium content, from 15 to 14 kcal/mol. In compositions with othe rare earths, conductivity increased with increasing ionic radius of the rare earth ion. Lithium ions were introduced by ion exchange in molten LiNO/sub 3/. The conductivities were slightly lower than those of the corresponding sodium samples, but decreased with increasing rare earth radius.

• Research Organization: Department of Chemistry, Polytechnic Institute of New York, Brooklyn, New York
• OSTI ID: 5262564
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 132:6; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ACTIVATION ENERGY
ALKALI METAL COMPOUNDS
CHEMISTRY
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
ENERGY
IONIC CONDUCTIVITY
LITHIUM COMPOUNDS
LITHIUM NITRATES
MIXTURES
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SILICATES
SILICON COMPOUNDS
SODIUM COMPOUNDS
SODIUM SILICATES
SOLID SOLUTIONS
SOLUTIONS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM SILICATES