Aurivillius type structure

Pardo, L., Castro, A., Millan, R, Alemany, C., Jimenez, R., Jimenez, B. (Bi3TiNb09)x(SrBi2Nb209)i.x Aurivillius type structure piezoelectric ceramics obtained firom mechanochemically activated oxides. Acta Mater. 48, 2421-2428 (2000)... 

Another important family of materials based on Bi203 are those that adopt the Aurivillius type structure (perovskite-related layered structure) with the chemical formula Bi4V20n, first reported by Abraham et The low temperature phase is a-Bi4V20n, and it presents two... 

As described in Section 8.2.6, along with YSZ, mixed oxygen-ion, and electron-conducting oxides with a perovskite-type structure, the so-called Aurivillius phase and pyrochlore materials are fundamentally used for the production of a variety of high-temperature electrochemical devices [50-58],... 

A further variation results from a combination of the above-described structures with those of the tetragonal PbO-type structure. A typical example of the resulting class of compounds., referred to as Aurivillius phases, is Bi2Nb205F, where the bismuth atoms combine with the oxygen atoms to form a highly altered polymeric network (28). Other examples of both ordered and disordered intergrowth phenomena from Aurivillius phases have been given by Rao et al. (24). 

Figure 13.18 Comparison of the crystal structures of BI2201 phase and the Aurivillius-type Bi2NbOsF phase. (Reprinted with permission from Russ. Chem. Rev., A. M. Abakumov et. al., 71, 5, 383-400 Copyright (2004) Royal Society of Chemistry.)...

Another group of materials that has displayed high oxide ion conductivity is based upon a layered bismuth perovskite-based structure, first reported by Aurivillius in 1949 [90-92], The so-called Aurivillius phases are chemically expressed normally as Bi2A B 03 +3 [82], where A is a large 12-coordinated cation and B a small 6-coordinated cation. The structure is formed by n perovskite-like layers, (A 1B 03n+1)2, sandwiched between bismuth-oxygen fluorite-type sheets, (Bi/) 2 [93,94],... 

Fig. 2 Different types of intergrowth structures formed by the Aurivillius family of bismuth oxides.

Compounds Containing Perovskite Layers. A second class of layered oxides have structures related to the three-dimensional perovskite lattice and include the Auriv-illius phases, the Ruddlesden-Popper phases and the Dion-Jacobson phases. The general composition can be written Ma[A iB 03 +i] where A is an alkaline or rare earth metal, and B is niobium or titanium. In the Aurivillius phases = Bi2 02 +, whereas M is an alkali metal cation in the ion-exchangeable Ruddlesden-Popper a = 2) and Dion-Jacobson a = 1) phases. The relationships between the three structure types is shown in Figure 14. The intercalation chemistry of the Dion - Jacobson phases was the first to be studied. 

Perovskite-type layered compounds are the intergrowth of perovskite l ers (P) ABO3 and slabs of the differ type of structure (rock salt, calcium fluorite type, cations of metals). Depending on the nature of slabs between perovskite blocks, layered compounds belong to three big groups Ruddlesden-Popper phases, Aurivillius phases, Dion-Jacobson phases. 

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