Solid solutions of perovskite in the LaO1.5-BaO-ScO 1.5-ZrO2 system at 1600°C

Koichi Suehiro; Susumu Imashuku; Tetsuya Uda; Yoshitaro Nose; Yasuhiro Awakura

doi:10.1016/j.jssc.2008.06.025

Solid solutions of perovskite in the LaO_1.5-BaO-ScO _1.5-ZrO₂ system at 1600°C

Koichi Suehiro, Susumu Imashuku, Tetsuya Uda, Yoshitaro Nose, Yasuhiro Awakura

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

1 Citation (Scopus)

Abstract

A partial pseudoternary phase diagram of the LaO_1.5-BaO-ScO _1.5 system was established at 1600°C. According to the phase diagram, the solubility of barium into the cubic perovskite phase (LaScO ₃) at 1600°C is 0.24 in a mole fraction of barium oxide (X _BaO) on the composition line where the mole fraction of scandium oxide is 0.50. Another cubic perovskite phase (BaZrO₃) in the BaO-ZrO₂-ScO_1.5 system is also known. We investigated the phase relationships between the two cubic perovskites in the pseudoquaternary phase diagram of the LaO_1.5-BaO-ScO_1.5-ZrO₂ system. As a result, we found the existence of a wide solid solution region between the cubic perovskites at 1600°C. The region was determined by X-ray diffraction (XRD) analysis and energy dispersive X-ray (EDX) microanalysis of samples with various compositions, and established the partial pseudoquaternary phase diagram.

Original language	English
Pages (from-to)	2572-2579
Number of pages	8
Journal	Journal of Solid State Chemistry
Volume	181
Issue number	10
DOIs	https://doi.org/10.1016/j.jssc.2008.06.025
Publication status	Published - 2008 Oct
Externally published	Yes

Keywords

Fuel cell
Phase diagram
Solubility
Thermodynamics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jssc.2008.06.025

Cite this

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title = "Solid solutions of perovskite in the LaO1.5-BaO-ScO 1.5-ZrO2 system at 1600°C",

abstract = "A partial pseudoternary phase diagram of the LaO1.5-BaO-ScO 1.5 system was established at 1600°C. According to the phase diagram, the solubility of barium into the cubic perovskite phase (LaScO 3) at 1600°C is 0.24 in a mole fraction of barium oxide (X BaO) on the composition line where the mole fraction of scandium oxide is 0.50. Another cubic perovskite phase (BaZrO3) in the BaO-ZrO2-ScO1.5 system is also known. We investigated the phase relationships between the two cubic perovskites in the pseudoquaternary phase diagram of the LaO1.5-BaO-ScO1.5-ZrO2 system. As a result, we found the existence of a wide solid solution region between the cubic perovskites at 1600°C. The region was determined by X-ray diffraction (XRD) analysis and energy dispersive X-ray (EDX) microanalysis of samples with various compositions, and established the partial pseudoquaternary phase diagram.",

keywords = "Fuel cell, Phase diagram, Solubility, Thermodynamics",

author = "Koichi Suehiro and Susumu Imashuku and Tetsuya Uda and Yoshitaro Nose and Yasuhiro Awakura",

year = "2008",

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language = "English",

volume = "181",

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T1 - Solid solutions of perovskite in the LaO1.5-BaO-ScO 1.5-ZrO2 system at 1600°C

AU - Suehiro, Koichi

AU - Imashuku, Susumu

AU - Uda, Tetsuya

AU - Nose, Yoshitaro

AU - Awakura, Yasuhiro

PY - 2008/10

Y1 - 2008/10

N2 - A partial pseudoternary phase diagram of the LaO1.5-BaO-ScO 1.5 system was established at 1600°C. According to the phase diagram, the solubility of barium into the cubic perovskite phase (LaScO 3) at 1600°C is 0.24 in a mole fraction of barium oxide (X BaO) on the composition line where the mole fraction of scandium oxide is 0.50. Another cubic perovskite phase (BaZrO3) in the BaO-ZrO2-ScO1.5 system is also known. We investigated the phase relationships between the two cubic perovskites in the pseudoquaternary phase diagram of the LaO1.5-BaO-ScO1.5-ZrO2 system. As a result, we found the existence of a wide solid solution region between the cubic perovskites at 1600°C. The region was determined by X-ray diffraction (XRD) analysis and energy dispersive X-ray (EDX) microanalysis of samples with various compositions, and established the partial pseudoquaternary phase diagram.

AB - A partial pseudoternary phase diagram of the LaO1.5-BaO-ScO 1.5 system was established at 1600°C. According to the phase diagram, the solubility of barium into the cubic perovskite phase (LaScO 3) at 1600°C is 0.24 in a mole fraction of barium oxide (X BaO) on the composition line where the mole fraction of scandium oxide is 0.50. Another cubic perovskite phase (BaZrO3) in the BaO-ZrO2-ScO1.5 system is also known. We investigated the phase relationships between the two cubic perovskites in the pseudoquaternary phase diagram of the LaO1.5-BaO-ScO1.5-ZrO2 system. As a result, we found the existence of a wide solid solution region between the cubic perovskites at 1600°C. The region was determined by X-ray diffraction (XRD) analysis and energy dispersive X-ray (EDX) microanalysis of samples with various compositions, and established the partial pseudoquaternary phase diagram.

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KW - Phase diagram

KW - Solubility

KW - Thermodynamics

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