Abstract
The synthesis and structure of triple layered Bi2Ln 2Ti3O12 Aurivillius phases, prepared from K2Ln2Ti3O10 Ruddlesden - Popper precursors has been investigated. In structural terms, these materials may be considered as being composed of a regular intergrowth of [Bi2O 2]2+ fluorite and [Ln2Ti3O 10]2 perovskite-type layers. A significant degree of cation disorder is present in the Bi2Ln2Ti 3O12 system, involving the cross substitution of Ln / Bi cations onto the Bi / Ln sites in the fluorite and perovskite-type layers, respectively. Bi / Ln disorder destabilises the presence of the Ln cation in the perovskite-type layer as the size mismatch of the Bi / Ln cations increases. Cation disorder in the Bi2Ln2Ti3O 12 system is therefore significantly suppressed as the size of the lanthanide cation is reduced.
Original language | English |
---|---|
Pages (from-to) | 335-340 |
Number of pages | 6 |
Journal | Materials Research Society Symposium - Proceedings |
Volume | 755 |
Publication status | Published - 10 Nov 2003 |
Event | Solid-State Chemistry of Inorganic Materials IV - Boston, MA, United States Duration: 2 Dec 2002 → 6 Dec 2002 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering