Synthesis and electrical property measurements of Ba β-alumina in a BaO-MgO-Al2O3 system

Gang He; Takayuki Narushima; Takashi Goto; Toshio Hirai; Yasutaka Iguchi

doi:10.2109/jcersj.106.1048

Synthesis and electrical property measurements of Ba β-alumina in a BaO-MgO-Al₂O₃ system

Gang He, Takayuki Narushima, Takashi Goto, Toshio Hirai, Yasutaka Iguchi

ENG - Materials Processing

Tohoku University

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

An ionic conductor, Ba β-alumina, was synthesized in a BaO-MgO-Al₂O₃ ternary system by solid state sintering at 2023 to 2073 K. The Ba β-alumina with a composition of BaO : MgO : Al₂O₃=1 : 1 : 5 was in a single phase. Its relative density was 96% of the theoretical density. The electrical conductivity of Ba β-alumina was 4.6 × 10^-3 S·m^-1 at 1673 K and the activation energy was 126.82 kJ·mol^-1. The mobile ion could be Ba²⁺, and its ionic transport number was about 0.8 to 0.9 at 1073 to 1673 K.

Original language	English
Pages (from-to)	1048-1050
Number of pages	3
Journal	Journal of the Ceramic Society of Japan
Volume	106
Issue number	11
DOIs	https://doi.org/10.2109/jcersj.106.1048
Publication status	Published - 1998 Nov

Keywords

Aluminate
Ionic conductor
Ionic transport number
Mobile ion
Solid electrolyte
Solid state sintering
a.c. impedance
β-alumina

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abstract = "An ionic conductor, Ba β-alumina, was synthesized in a BaO-MgO-Al2O3 ternary system by solid state sintering at 2023 to 2073 K. The Ba β-alumina with a composition of BaO : MgO : Al2O3=1 : 1 : 5 was in a single phase. Its relative density was 96% of the theoretical density. The electrical conductivity of Ba β-alumina was 4.6 × 10-3 S·m-1 at 1673 K and the activation energy was 126.82 kJ·mol-1. The mobile ion could be Ba2+, and its ionic transport number was about 0.8 to 0.9 at 1073 to 1673 K.",

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AU - He, Gang

AU - Narushima, Takayuki

AU - Goto, Takashi

AU - Hirai, Toshio

AU - Iguchi, Yasutaka

PY - 1998/11

Y1 - 1998/11

N2 - An ionic conductor, Ba β-alumina, was synthesized in a BaO-MgO-Al2O3 ternary system by solid state sintering at 2023 to 2073 K. The Ba β-alumina with a composition of BaO : MgO : Al2O3=1 : 1 : 5 was in a single phase. Its relative density was 96% of the theoretical density. The electrical conductivity of Ba β-alumina was 4.6 × 10-3 S·m-1 at 1673 K and the activation energy was 126.82 kJ·mol-1. The mobile ion could be Ba2+, and its ionic transport number was about 0.8 to 0.9 at 1073 to 1673 K.

AB - An ionic conductor, Ba β-alumina, was synthesized in a BaO-MgO-Al2O3 ternary system by solid state sintering at 2023 to 2073 K. The Ba β-alumina with a composition of BaO : MgO : Al2O3=1 : 1 : 5 was in a single phase. Its relative density was 96% of the theoretical density. The electrical conductivity of Ba β-alumina was 4.6 × 10-3 S·m-1 at 1673 K and the activation energy was 126.82 kJ·mol-1. The mobile ion could be Ba2+, and its ionic transport number was about 0.8 to 0.9 at 1073 to 1673 K.

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Synthesis and electrical property measurements of Ba β-alumina in a BaO-MgO-Al₂O₃ system

Abstract

Keywords

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