Sintering properties of trivalent cation-doped barium zirconate at 1600°C

Susumu Imashuku; T. Uda; Y. Awakura

doi:10.1149/1.2766530

Sintering properties of trivalent cation-doped barium zirconate at 1600°C

Susumu Imashuku, T. Uda, Y. Awakura

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

33 Citations (Scopus)

Abstract

Typical microstructures of BaZr0.85 Y0.15 O3-δ sintered for 4-24 h at 1600°C were mixtures of larger and smaller grains. Well-grown and homogeneous grains of BaZr0.85 Y0.15 O3-δ were observed by adding an extra amount of barium oxide from stoichiometric composition or extending the sintering time to 100 h. Such an extra amount of barium oxide is expected to decrease chemical stability in a wet atmosphere, and we observed the precipitation of yttria after 100 h sintering. However, we did not meet such difficulties in sintering BaZr0.85 Sc0.15 O3-δ. Large and uniform grains were observed in BaZr0.85 Sc0.15 O3-δ by sintering for 24 h.

Original language	English
Journal	Electrochemical and Solid-State Letters
Volume	10
Issue number	10
DOIs	https://doi.org/10.1149/1.2766530
Publication status	Published - 2007 Aug 17
Externally published	Yes

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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AU - Imashuku, Susumu

AU - Uda, T.

AU - Awakura, Y.

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AB - Typical microstructures of BaZr0.85 Y0.15 O3-δ sintered for 4-24 h at 1600°C were mixtures of larger and smaller grains. Well-grown and homogeneous grains of BaZr0.85 Y0.15 O3-δ were observed by adding an extra amount of barium oxide from stoichiometric composition or extending the sintering time to 100 h. Such an extra amount of barium oxide is expected to decrease chemical stability in a wet atmosphere, and we observed the precipitation of yttria after 100 h sintering. However, we did not meet such difficulties in sintering BaZr0.85 Sc0.15 O3-δ. Large and uniform grains were observed in BaZr0.85 Sc0.15 O3-δ by sintering for 24 h.

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Sintering properties of trivalent cation-doped barium zirconate at 1600°C

Abstract

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