Vacancy ordering in reduced barium titanate

David I. Woodward; Ian M. Reaney; Gaiying Y. Yang; Elizabeth C. Dickey; Clive A. Randall

doi:10.1063/1.1759390

Vacancy ordering in reduced barium titanate

David I. Woodward, Ian M. Reaney, Gaiying Y. Yang, Elizabeth C. Dickey, Clive A. Randall

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

108 Scopus citations

Abstract

A crystal structure for reduced barium titanate, BaTiO _3-δ, δ∼0.33, formed during the degradation of Ni-BaTiO ₃ X7R multilayer ceramic capacitors (MLCC) was proposed. MLCCs were fabricated using traditional tape casting and screen printing methods. The vacancy ordering in reduced barium titanate was investigated. The high-resolution transmission electron microscopy and selected-area electron diffraction were used in combination with computer simulations to show that oxygen vacancies accrete on every third pseudocubic {111} plane, resulting in a cell with space group P3 m 1. Ti ⁴⁺ was reduced to Ti ³⁺ as a mechanism of charge compensation within oxygen-deficient octahedra.

Original language	English (US)
Pages (from-to)	4650-4652
Number of pages	3
Journal	Applied Physics Letters
Volume	84
Issue number	23
DOIs	https://doi.org/10.1063/1.1759390
State	Published - Jun 7 2004

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.1759390

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title = "Vacancy ordering in reduced barium titanate",

abstract = "A crystal structure for reduced barium titanate, BaTiO 3-δ, δ∼0.33, formed during the degradation of Ni-BaTiO 3 X7R multilayer ceramic capacitors (MLCC) was proposed. MLCCs were fabricated using traditional tape casting and screen printing methods. The vacancy ordering in reduced barium titanate was investigated. The high-resolution transmission electron microscopy and selected-area electron diffraction were used in combination with computer simulations to show that oxygen vacancies accrete on every third pseudocubic {111} plane, resulting in a cell with space group P3 m 1. Ti 4+ was reduced to Ti 3+ as a mechanism of charge compensation within oxygen-deficient octahedra.",

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year = "2004",

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doi = "10.1063/1.1759390",

language = "English (US)",

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T1 - Vacancy ordering in reduced barium titanate

AU - Woodward, David I.

AU - Reaney, Ian M.

AU - Yang, Gaiying Y.

AU - Dickey, Elizabeth C.

AU - Randall, Clive A.

PY - 2004/6/7

Y1 - 2004/6/7

N2 - A crystal structure for reduced barium titanate, BaTiO 3-δ, δ∼0.33, formed during the degradation of Ni-BaTiO 3 X7R multilayer ceramic capacitors (MLCC) was proposed. MLCCs were fabricated using traditional tape casting and screen printing methods. The vacancy ordering in reduced barium titanate was investigated. The high-resolution transmission electron microscopy and selected-area electron diffraction were used in combination with computer simulations to show that oxygen vacancies accrete on every third pseudocubic {111} plane, resulting in a cell with space group P3 m 1. Ti 4+ was reduced to Ti 3+ as a mechanism of charge compensation within oxygen-deficient octahedra.

AB - A crystal structure for reduced barium titanate, BaTiO 3-δ, δ∼0.33, formed during the degradation of Ni-BaTiO 3 X7R multilayer ceramic capacitors (MLCC) was proposed. MLCCs were fabricated using traditional tape casting and screen printing methods. The vacancy ordering in reduced barium titanate was investigated. The high-resolution transmission electron microscopy and selected-area electron diffraction were used in combination with computer simulations to show that oxygen vacancies accrete on every third pseudocubic {111} plane, resulting in a cell with space group P3 m 1. Ti 4+ was reduced to Ti 3+ as a mechanism of charge compensation within oxygen-deficient octahedra.

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Vacancy ordering in reduced barium titanate

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