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Silicon Nitride Ceramics with Sodium Ion Conductive Grain Boundary Phase

Published online by Cambridge University Press:  31 January 2011

Hirokazu Kawaoka ,
Tohru Sekino ,
Takafumi Kusunose  and
Koichi Niihara
Hirokazu Kawaoka
Affiliation:
The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Tohru Sekino
Affiliation:
The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Takafumi Kusunose
Affiliation:
The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Koichi Niihara
Affiliation:
The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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Abstract

Sodium ion-conductive silicon nitride ceramic with Na2O–Al2O3–SiO2 glass as the grain boundary phase was fabricated by adding Na2CO3, Al2O3, and SiO2 as sintering additives. The electrical conductivity was two and four orders of magnitude higher than that of Si3N4 ceramic with Y2O3 and Al2O3 additives at 100 and 1000°C, respectively. This result clearly indicates that ionic conductivity can be provided to insulating structural ceramics by modification of the grain boundary phase without dispersion of conductive particles.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 18 , Issue 12 , December 2003 , pp. 2752 - 2755
Copyright
Copyright © Materials Research Society 2003

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References

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