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Title: Ionic conductivity and sinterability of NASICON-type ceramics: The systems NaM{sub 2} (PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, and Zr)

Abstract

Sodium-rich NASICON-type ceramics, the NaM{sub 2}(PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, Zr) systems, were investigated in order to obtain a material having a high Na{sup +} conductivity and high density. The ionic conductivity and the sinterability were greatly improved by an increase in the value of y for all of the systems examined. Added Na{sub 2}O was not soluble in the NASICON-type skeleton, since the lattice constants and the X-ray diffraction patterns were not changed by the Na{sub 2}O addition in all of the samples. Na{sub 2}O acts as a flux for obtaining highly dense ceramics and highly conductive grain boundaries. Partial A{sub 2} site insertion by Na{sup +} ions is effective for the enhancement of conductivity, because the conductivity for Na{sub 1.5}M(III){sub 0.5}Zr{sub 1.5}(PO{sub 4}){sub 3} (M = In or Y) is about 1 order of magnitude higher than the maximum conductivity of the NaZr{sub 2}(PO{sub 4}){sub 3} + yNa{sub 2}O system.

Authors:
;  [1]
  1. Niihama National Coll. of Technology, Niihama, Ehime (Japan). Dept. of Industrial Chemistry
Publication Date:
OSTI Identifier:
413331
Resource Type:
Journal Article
Journal Name:
Journal of the American Ceramic Society
Additional Journal Information:
Journal Volume: 79; Journal Issue: 10; Other Information: PBD: Oct 1996
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 25 ENERGY STORAGE; SODIUM PHOSPHATES; SYNTHESIS; SINTERING; IONIC CONDUCTIVITY; GERMANIUM PHOSPHATES; TITANIUM PHOSPHATES; HAFNIUM PHOSPHATES; ZIRCONIUM PHOSPHATES; SODIUM OXIDES; ELECTRIC BATTERIES; SOLID ELECTROLYTES; POWDERS; PARTICLE SIZE; X-RAY DIFFRACTION; DENSITY; GRAIN BOUNDARIES

Citation Formats

Aono, Hiromichi, and Sugimoto, Eisuke. Ionic conductivity and sinterability of NASICON-type ceramics: The systems NaM{sub 2} (PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, and Zr). United States: N. p., 1996. Web.
Aono, Hiromichi, & Sugimoto, Eisuke. Ionic conductivity and sinterability of NASICON-type ceramics: The systems NaM{sub 2} (PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, and Zr). United States.
Aono, Hiromichi, and Sugimoto, Eisuke. 1996. "Ionic conductivity and sinterability of NASICON-type ceramics: The systems NaM{sub 2} (PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, and Zr)". United States.
@article{osti_413331,
title = {Ionic conductivity and sinterability of NASICON-type ceramics: The systems NaM{sub 2} (PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, and Zr)},
author = {Aono, Hiromichi and Sugimoto, Eisuke},
abstractNote = {Sodium-rich NASICON-type ceramics, the NaM{sub 2}(PO{sub 4}){sub 3} + yNa{sub 2}O (M = Ge, Ti, Hf, Zr) systems, were investigated in order to obtain a material having a high Na{sup +} conductivity and high density. The ionic conductivity and the sinterability were greatly improved by an increase in the value of y for all of the systems examined. Added Na{sub 2}O was not soluble in the NASICON-type skeleton, since the lattice constants and the X-ray diffraction patterns were not changed by the Na{sub 2}O addition in all of the samples. Na{sub 2}O acts as a flux for obtaining highly dense ceramics and highly conductive grain boundaries. Partial A{sub 2} site insertion by Na{sup +} ions is effective for the enhancement of conductivity, because the conductivity for Na{sub 1.5}M(III){sub 0.5}Zr{sub 1.5}(PO{sub 4}){sub 3} (M = In or Y) is about 1 order of magnitude higher than the maximum conductivity of the NaZr{sub 2}(PO{sub 4}){sub 3} + yNa{sub 2}O system.},
doi = {},
url = {https://www.osti.gov/biblio/413331}, journal = {Journal of the American Ceramic Society},
number = 10,
volume = 79,
place = {United States},
year = {1996},
month = {10}
}