Structural models for intergrowth structures in the phase system Al 2O3-TiO2

Stefan Hoffmann; Stefan T. Norberg; Masahiro Yoshimura

doi:10.1016/j.jssc.2005.07.001

Structural models for intergrowth structures in the phase system Al ₂O₃-TiO₂

Stefan Hoffmann, Stefan T. Norberg, Masahiro Yoshimura

Department of Materials Science and Engineering

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

19 Citations (Scopus)

Abstract

The phase system Al₂O₃-TiO₂ was investigated in the compositional range from 48:52 to 62:38 mol% Al ₂O₃:TiO₂. The samples were prepared by melting the binary oxides in an arc-imaging furnace and the obtained samples were examined by powder X-ray diffraction. The recorded powder patterns could be interpreted in terms of intergrowth structures consisting of two basic building blocks, which were deduced from the known crystal structures of β-Al ₂TiO₅ and Al₆Ti₂O₁₃. The structure of a new ordered compound with the formula Al₁₆Ti ₅O₃₄ is proposed. The thermal stability was estimated from DTA and tempering experiments and showed that all prepared samples decompose at temperatures around 800°C into the binary oxides corundum and titania.

Original language	English
Pages (from-to)	2897-2906
Number of pages	10
Journal	Journal of Solid State Chemistry
Volume	178
Issue number	9
DOIs	https://doi.org/10.1016/j.jssc.2005.07.001
Publication status	Published - 2005 Sep

All Science Journal Classification (ASJC) codes

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

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10.1016/j.jssc.2005.07.001

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title = "Structural models for intergrowth structures in the phase system Al 2O3-TiO2",

abstract = "The phase system Al2O3-TiO2 was investigated in the compositional range from 48:52 to 62:38 mol% Al 2O3:TiO2. The samples were prepared by melting the binary oxides in an arc-imaging furnace and the obtained samples were examined by powder X-ray diffraction. The recorded powder patterns could be interpreted in terms of intergrowth structures consisting of two basic building blocks, which were deduced from the known crystal structures of β-Al 2TiO5 and Al6Ti2O13. The structure of a new ordered compound with the formula Al16Ti 5O34 is proposed. The thermal stability was estimated from DTA and tempering experiments and showed that all prepared samples decompose at temperatures around 800°C into the binary oxides corundum and titania.",

author = "Stefan Hoffmann and Norberg, {Stefan T.} and Masahiro Yoshimura",

note = "Funding Information: SH acknowledge JSPS post doc fellowship No. P03752 and SN acknowledge JSPS post doc fellowship No. P03707. Dr. T. Watanabe and Dr. T. Ishigaki are kindly acknowledged for their help in recording powder XRD patterns. ",

year = "2005",

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AU - Hoffmann, Stefan

AU - Norberg, Stefan T.

AU - Yoshimura, Masahiro

N1 - Funding Information: SH acknowledge JSPS post doc fellowship No. P03752 and SN acknowledge JSPS post doc fellowship No. P03707. Dr. T. Watanabe and Dr. T. Ishigaki are kindly acknowledged for their help in recording powder XRD patterns.

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AB - The phase system Al2O3-TiO2 was investigated in the compositional range from 48:52 to 62:38 mol% Al 2O3:TiO2. The samples were prepared by melting the binary oxides in an arc-imaging furnace and the obtained samples were examined by powder X-ray diffraction. The recorded powder patterns could be interpreted in terms of intergrowth structures consisting of two basic building blocks, which were deduced from the known crystal structures of β-Al 2TiO5 and Al6Ti2O13. The structure of a new ordered compound with the formula Al16Ti 5O34 is proposed. The thermal stability was estimated from DTA and tempering experiments and showed that all prepared samples decompose at temperatures around 800°C into the binary oxides corundum and titania.

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