Aurivillius phases are a form of perovskite represented by the general formulae is (Bi2O2)(An−1BnO3n+1) (where A is a large 12 co-ordinate cation, and B is a small 6 co-ordinate cation).[1]
Basically, their structure is built by alternating layers of [Bi2O2]2+ and pseudo-perovskite blocks, with perovskite layers that are n octahedral layers in thickness.[2][3] This crystal structure was first described in 1949 by Swedish chemist Bengt Aurivillius.[4] The first interest in Aurivillius phases arose from the observation of ferroelectricity even for the simplest member, Bi2WO6 (n=1) of this crystallographic family.[5] The Mo-homologous Aurivillius phase Bi2MoO6 was recently investigated as a potential LTCC material. Their oxide ion-conducting properties of Aurivillius phases were first discovered in the 1970s by Takahashi et al., and they have been used too for this purpose ever since.[6]
Aurivillius phase oxide materials are a class of lead-free ceramics.[7][8]
See also edit
References edit
- ^ Frit, B.; Mercurio, J. P. (1992-10-19). "The crystal chemistry and dielectric properties of the Aurivillius family of complex bismuth oxides with perovskite-like layered structures". Journal of Alloys and Compounds. 188: 27–35. doi:10.1016/0925-8388(92)90639-Q. ISSN 0925-8388.
- ^ "Aurivillius phases". Moscow State University website. Retrieved 14 November 2013.
- ^ Schaak, Raymond E.; Mallouk, Thomas E. (2002-04-01). "Perovskites by Design: A Toolbox of Solid-State Reactions". Chemistry of Materials. 14 (4): 1455–1471. doi:10.1021/cm010689m. ISSN 0897-4756.
- ^ Aurivillius B., Ark. Kemi., 1949, p. 463
- ^ Withers, R. L.; Thompson, J. G.; Rae, A. D. (1991-10-01). "The crystal chemistry underlying ferroelectricity in Bi4Ti3O12, Bi3TiNbO9, and Bi2WO6". Journal of Solid State Chemistry. 94 (2): 404–417. Bibcode:1991JSSCh..94..404W. doi:10.1016/0022-4596(91)90207-X. ISSN 0022-4596.
- ^ Kendall, K. R.; Navas, C.; Thomas, J. K.; Zur Loye, H. C. (1996). "Recent Developments in Oxide Ion Conductors: Aurivillius Phases". Chemistry of Materials. 8 (3): 642. doi:10.1021/cm9503083.
- ^ Moure, Alberto; Castro, Alicia; Pardo, Lorena (2009-01-01). "Aurivillius-type ceramics, a class of high temperature piezoelectric materials: Drawbacks, advantages and trends". Progress in Solid State Chemistry. 37 (1): 15–39. doi:10.1016/j.progsolidstchem.2009.06.001. ISSN 0079-6786.
- ^ Subohi, Oroosa (2021). Aurivillius phase materials : exploring lead-free ferroelectrics. Rajnish Kurchania. Bristol. ISBN 978-0-7503-3419-8. OCLC 1291620491.
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