Electrical conductivity of non-stoichiometric Sr β-alumina single crystals prepared by a floating zone method

An Yu Zhang; Takaya Akashi; Takashi Goto

doi:10.1016/S0167-2738(02)00678-1

Electrical conductivity of non-stoichiometric Sr β-alumina single crystals prepared by a floating zone method

An Yu Zhang, Takaya Akashi, Takashi Goto

Materials Processing and Characterization Division

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

3 Citations (Scopus)

Abstract

Non-stoichiometric Sr β-alumina single crystals were prepared in SrO-MgO-Al₂O₃ system by a floating zone (FZ) method. The range of non-stoichiometry was determined as Sr_1-0.25xMg_1-xAl_10+xO_17+0.25x, where 0 < x ≤ 0.41. The lattice parameters of a increased and c decreased with increasing SrO content in the solid solution range. The single crystals had a cleavage plane parallel to the (001) plane and growth direction. The electrical conductivity parallel and perpendicular to the cleavage plane showed maximum at x = 0.2 (i.e., 13.8 mol% SrO). The activation energy of electrical conductivity parallel to the cleavage plane (140 to 165 kJ/mol) was almost the same as that perpendicular to the cleavage plane (150 to 170 kJ/mol).

Original language	English
Pages (from-to)	425-431
Number of pages	7
Journal	Solid State Ionics
Volume	156
Issue number	3-4
DOIs	https://doi.org/10.1016/S0167-2738(02)00678-1
Publication status	Published - 2003 Jan 1

Keywords

Cell parameters
Electrical conductivity
Floating zone method
Single crystal
Single-phase region
Sr β-alumina

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/S0167-2738(02)00678-1

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title = "Electrical conductivity of non-stoichiometric Sr β-alumina single crystals prepared by a floating zone method",

abstract = "Non-stoichiometric Sr β-alumina single crystals were prepared in SrO-MgO-Al2O3 system by a floating zone (FZ) method. The range of non-stoichiometry was determined as Sr1-0.25xMg1-xAl10+xO17+0.25x, where 0 < x ≤ 0.41. The lattice parameters of a increased and c decreased with increasing SrO content in the solid solution range. The single crystals had a cleavage plane parallel to the (001) plane and growth direction. The electrical conductivity parallel and perpendicular to the cleavage plane showed maximum at x = 0.2 (i.e., 13.8 mol% SrO). The activation energy of electrical conductivity parallel to the cleavage plane (140 to 165 kJ/mol) was almost the same as that perpendicular to the cleavage plane (150 to 170 kJ/mol).",

keywords = "Cell parameters, Electrical conductivity, Floating zone method, Single crystal, Single-phase region, Sr β-alumina",

author = "Zhang, {An Yu} and Takaya Akashi and Takashi Goto",

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T1 - Electrical conductivity of non-stoichiometric Sr β-alumina single crystals prepared by a floating zone method

AU - Zhang, An Yu

AU - Akashi, Takaya

AU - Goto, Takashi

PY - 2003/1/1

Y1 - 2003/1/1

N2 - Non-stoichiometric Sr β-alumina single crystals were prepared in SrO-MgO-Al2O3 system by a floating zone (FZ) method. The range of non-stoichiometry was determined as Sr1-0.25xMg1-xAl10+xO17+0.25x, where 0 < x ≤ 0.41. The lattice parameters of a increased and c decreased with increasing SrO content in the solid solution range. The single crystals had a cleavage plane parallel to the (001) plane and growth direction. The electrical conductivity parallel and perpendicular to the cleavage plane showed maximum at x = 0.2 (i.e., 13.8 mol% SrO). The activation energy of electrical conductivity parallel to the cleavage plane (140 to 165 kJ/mol) was almost the same as that perpendicular to the cleavage plane (150 to 170 kJ/mol).

AB - Non-stoichiometric Sr β-alumina single crystals were prepared in SrO-MgO-Al2O3 system by a floating zone (FZ) method. The range of non-stoichiometry was determined as Sr1-0.25xMg1-xAl10+xO17+0.25x, where 0 < x ≤ 0.41. The lattice parameters of a increased and c decreased with increasing SrO content in the solid solution range. The single crystals had a cleavage plane parallel to the (001) plane and growth direction. The electrical conductivity parallel and perpendicular to the cleavage plane showed maximum at x = 0.2 (i.e., 13.8 mol% SrO). The activation energy of electrical conductivity parallel to the cleavage plane (140 to 165 kJ/mol) was almost the same as that perpendicular to the cleavage plane (150 to 170 kJ/mol).

KW - Cell parameters

KW - Electrical conductivity

KW - Floating zone method

KW - Single crystal

KW - Single-phase region

KW - Sr β-alumina

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JF - Solid State Ionics

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