Structure Refinement of Five Layers Aurivillius Compound: Ba4Bi2Nb2Ti3O18 | Zendy

Ismunandar Ismunandar | Zendy; Edi Mikrianto | Zendy

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Structure Refinement of Five Layers Aurivillius Compound: Ba4Bi2Nb2Ti3O18

Author(s) -

Ismunandar Ismunandar,

Edi Mikrianto

Publication year - 2004

Publication title -

itb journal of engineering science

Language(s) - English

Resource type - Journals

ISSN - 1978-3051

DOI - 10.5614/itbj.eng.sci.2004.36.1.4

Subject(s) - aurivillius , orthorhombic crystal system , ferroelectricity , materials science , crystallography , rietveld refinement , perovskite (structure) , powder diffraction , phase (matter) , diffraction , crystal structure , optics , chemistry , optoelectronics , dielectric , physics , organic chemistry

The room temperature structures of the five layers Aurivillius phase Ba 4 Bi 2 Nb 2 Ti 3 O 18 has been refined from X-ray powder diffraction data using the Rietveld method. The structures consist of [Bi 2 O 2 ] 2+ layers interleaved with perovskite-like [Ba 4 Nb 2 Ti 3 O 16 ] 2- blocks. The oxides was found to be orthorhombic (SG B 2 cb ); a = 5.5017(8), b = 5.5031(8), c = 50.363(3) A, R p = 25.53 R wp = 35.54 R exp = 29.30 R Bragg = 9.92. The structural features of the compound is found similar to that of other layered Aurivillius compounds. Using the available structural data the ferroelectric properties could be explained and strategies to find good ferroelectric materials could be inferred.

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