Doping mechanisms and electrical properties of La-doped BaTiO3 ceramics

Finlay D Morrison; DC Sinclair; AR West

doi:10.1016/S1466-6049(01)00128-3

Doping mechanisms and electrical properties of La-doped BaTiO3 ceramics

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Abstract

The electrical properties of Ba1-xLaxTi1-x/4O3 ceramics where x less than or equal to 0.20 were investigated by impedance spectroscopy after heat treatment in O-2, Ar and air at 1350 degreesC, Samples heated in O-2, were electrically insulating with very high maximum permittivities, similar to 25,000 at x=0.06 and exhibited significant 'relaxor-type' behaviour at x=0.10. Samples heated in Ar were semiconducting for all x whereas air heated samples were electrically inhomogeneous. Semiconductivity in these materials is attributed to oxygen loss as opposed to La-donor doping. (C) 2001 Elsevier Science Ltd. All rights reserved.

Original language	English
Pages (from-to)	1205-1210
Number of pages	6
Journal	International Journal of Inorganic Materials
Volume	3
Issue number	8
DOIs	https://doi.org/10.1016/S1466-6049(01)00128-3
Publication status	Published - Dec 2001

Keywords

ferroelectric oxides
electroceramics
doping mechanisms
phase transitions
BARIUM-TITANATE CERAMICS
DEFECT CHEMISTRY

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10.1016/S1466-6049(01)00128-3

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title = "Doping mechanisms and electrical properties of La-doped BaTiO3 ceramics",

abstract = "The electrical properties of Ba1-xLaxTi1-x/4O3 ceramics where x less than or equal to 0.20 were investigated by impedance spectroscopy after heat treatment in O-2, Ar and air at 1350 degreesC, Samples heated in O-2, were electrically insulating with very high maximum permittivities, similar to 25,000 at x=0.06 and exhibited significant 'relaxor-type' behaviour at x=0.10. Samples heated in Ar were semiconducting for all x whereas air heated samples were electrically inhomogeneous. Semiconductivity in these materials is attributed to oxygen loss as opposed to La-donor doping. (C) 2001 Elsevier Science Ltd. All rights reserved.",

keywords = "ferroelectric oxides, electroceramics, doping mechanisms, phase transitions, BARIUM-TITANATE CERAMICS, DEFECT CHEMISTRY",

author = "Morrison, {Finlay D} and DC Sinclair and AR West",

year = "2001",

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doi = "10.1016/S1466-6049(01)00128-3",

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T1 - Doping mechanisms and electrical properties of La-doped BaTiO3 ceramics

AU - Morrison, Finlay D

AU - Sinclair, DC

AU - West, AR

PY - 2001/12

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N2 - The electrical properties of Ba1-xLaxTi1-x/4O3 ceramics where x less than or equal to 0.20 were investigated by impedance spectroscopy after heat treatment in O-2, Ar and air at 1350 degreesC, Samples heated in O-2, were electrically insulating with very high maximum permittivities, similar to 25,000 at x=0.06 and exhibited significant 'relaxor-type' behaviour at x=0.10. Samples heated in Ar were semiconducting for all x whereas air heated samples were electrically inhomogeneous. Semiconductivity in these materials is attributed to oxygen loss as opposed to La-donor doping. (C) 2001 Elsevier Science Ltd. All rights reserved.

AB - The electrical properties of Ba1-xLaxTi1-x/4O3 ceramics where x less than or equal to 0.20 were investigated by impedance spectroscopy after heat treatment in O-2, Ar and air at 1350 degreesC, Samples heated in O-2, were electrically insulating with very high maximum permittivities, similar to 25,000 at x=0.06 and exhibited significant 'relaxor-type' behaviour at x=0.10. Samples heated in Ar were semiconducting for all x whereas air heated samples were electrically inhomogeneous. Semiconductivity in these materials is attributed to oxygen loss as opposed to La-donor doping. (C) 2001 Elsevier Science Ltd. All rights reserved.

KW - ferroelectric oxides

KW - electroceramics

KW - doping mechanisms

KW - phase transitions

KW - BARIUM-TITANATE CERAMICS

KW - DEFECT CHEMISTRY

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DO - 10.1016/S1466-6049(01)00128-3

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EP - 1210

JO - International Journal of Inorganic Materials

JF - International Journal of Inorganic Materials

IS - 8

ER -

Doping mechanisms and electrical properties of La-doped BaTiO3 ceramics

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Keywords

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