Synthesis And Characterization Of Barium Lanthanum Titanates

Author

Jyoti P. Guha, Missouri University of Science and TechnologyFollow

Abstract

Ternary compounds in the system BaO—TiO₂—La₂O₃ were prepared by the solid‐state reaction technique at temperatures between 1300° and 1400°C using precursor oxides as the starting materials. In an alternative processing technique, BaTiO₃ was reacted with appropriate proportions of prefabricated lanthanum titanates at 1350°C to obtain the compounds. Two compounds were identified in the TiO₂‐rich region of the system. The X‐ray powder diffraction pattern of a compound with a chemical composition BaLa₂Ti₃O₁₀ (BaO·La₂O₃·3TiO₂) is indexed on the basis of an orthorhombic unit cell with a= 7.665 x 10−1 nm, b= 28.524 x 10−1 nm, and c= 3.876 x 10−1 nm. The other compound, which has a chemical composition Ba₄La₈Ti₁₇O₅₀ (BaO·La₂O₃·4.25TiO₂) occurs in a narrow homogeneity range within the system. The X‐ray powder diffraction pattern of the compound is indexed on the basis of an orthorhombic unit cell with a= 12.317 x 10−1 nm, b= 22.394 x 10−1 nm, and c= 3.881 x 10−1 nm. Both the compounds are compatible with BaTiO₃ and form pseudobinary joins with BaTiO₃ in the system BaO—TiO₂—La₂O₃. Copyright © 1991, Wiley Blackwell. All rights reserved

Recommended Citation

J. P. Guha, "Synthesis And Characterization Of Barium Lanthanum Titanates," Journal of the American Ceramic Society, vol. 74, no. 4, pp. 878 - 880, Wiley, Jan 1991.

The definitive version is available at https://doi.org/10.1111/j.1151-2916.1991.tb06946.x

Department(s)

Materials Science and Engineering

Publication Status

Full Access

Keywords and Phrases

barium titanate; characterization; lanthanides; synthesis; X‐ray diffraction

International Standard Serial Number (ISSN)

1551-2916; 0002-7820

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Wiley, All rights reserved.

Publication Date

01 Jan 1991