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Title: New substitutions and novel derivatives of the Aurivillius phases, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}

Abstract

We investigated isomorphous substitution of several metal atoms in the Aurivillius structures, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}, in an effort to understand structure-property correlations. Our investigations have led to the synthesis of new derivatives, Bi{sub 4}LnTiMWO{sub 15} (Ln = La, Pr; M = Nb, Ta), as well as Bi{sub 4}PbNb{sub 2}WO{sub 15} and Bi{sub 3}LaPbNb{sub 2}WO{sub 15}, that largely retain the Aurivillius (n = 1) + (n = 2) intergrowth structure of the parent oxide Bi{sub 5}TiNbWO{sub 15}, but characteristically tend toward a centrosymmetric/tetragonal structure for the Ln-substituted derivatives. On the other hand, coupled substitution, 2Ti{sup IV} {sup {yields}} M{sup V} + Fe{sup III} in Bi{sub 4}Ti{sub 3}O{sub 12}, yields new Aurivillius phases, Bi{sub 4}Ti{sub 3-2x}Nb {sub x}Fe {sub x}O{sub 12} (x = 0.25, 0.50) and Bi{sub 4}Ti{sub 3-2x}Ta {sub x}Fe {sub x}O{sub 12} (x = 0.25) that retain the orthorhombic noncentrosymmetric structure of the parent Bi{sub 4}Ti{sub 3}O{sub 12}. Two new members of this family, Bi{sub 2}Sr{sub 2}Nb{sub 2}RuO{sub 12} and Bi{sub 2}SrNaNb{sub 2}RuO{sub 12} that are analogous to Bi{sub 2}Sr{sub 2}Nb{sub 2}TiO{sub 12}, possessing tetragonal (I4/mmm) Aurivillius structure have also been synthesized.

Authors:
 [1];  [1];  [2]
  1. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India)
  2. Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012 (India). E-mail: gopal@sscu.iisc.ernet.in
Publication Date:
OSTI Identifier:
21000641
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 42; Journal Issue: 5; Other Information: DOI: 10.1016/j.materresbull.2006.08.009; PII: S0025-5408(06)00329-1; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CHEMICAL PREPARATION; METALS; OPTICAL PROPERTIES; ORTHORHOMBIC LATTICES; OXIDES; TETRAGONAL LATTICES; X-RAY DIFFRACTION

Citation Formats

Tripathy, Mamata, Mani, Rohini, and Gopalakrishnan, J. New substitutions and novel derivatives of the Aurivillius phases, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}. United States: N. p., 2007. Web. doi:10.1016/j.materresbull.2006.08.009.
Tripathy, Mamata, Mani, Rohini, & Gopalakrishnan, J. New substitutions and novel derivatives of the Aurivillius phases, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}. United States. doi:10.1016/j.materresbull.2006.08.009.
Tripathy, Mamata, Mani, Rohini, and Gopalakrishnan, J. Thu . "New substitutions and novel derivatives of the Aurivillius phases, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}". United States. doi:10.1016/j.materresbull.2006.08.009.
@article{osti_21000641,
title = {New substitutions and novel derivatives of the Aurivillius phases, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}},
author = {Tripathy, Mamata and Mani, Rohini and Gopalakrishnan, J.},
abstractNote = {We investigated isomorphous substitution of several metal atoms in the Aurivillius structures, Bi{sub 5}TiNbWO{sub 15} and Bi{sub 4}Ti{sub 3}O{sub 12}, in an effort to understand structure-property correlations. Our investigations have led to the synthesis of new derivatives, Bi{sub 4}LnTiMWO{sub 15} (Ln = La, Pr; M = Nb, Ta), as well as Bi{sub 4}PbNb{sub 2}WO{sub 15} and Bi{sub 3}LaPbNb{sub 2}WO{sub 15}, that largely retain the Aurivillius (n = 1) + (n = 2) intergrowth structure of the parent oxide Bi{sub 5}TiNbWO{sub 15}, but characteristically tend toward a centrosymmetric/tetragonal structure for the Ln-substituted derivatives. On the other hand, coupled substitution, 2Ti{sup IV} {sup {yields}} M{sup V} + Fe{sup III} in Bi{sub 4}Ti{sub 3}O{sub 12}, yields new Aurivillius phases, Bi{sub 4}Ti{sub 3-2x}Nb {sub x}Fe {sub x}O{sub 12} (x = 0.25, 0.50) and Bi{sub 4}Ti{sub 3-2x}Ta {sub x}Fe {sub x}O{sub 12} (x = 0.25) that retain the orthorhombic noncentrosymmetric structure of the parent Bi{sub 4}Ti{sub 3}O{sub 12}. Two new members of this family, Bi{sub 2}Sr{sub 2}Nb{sub 2}RuO{sub 12} and Bi{sub 2}SrNaNb{sub 2}RuO{sub 12} that are analogous to Bi{sub 2}Sr{sub 2}Nb{sub 2}TiO{sub 12}, possessing tetragonal (I4/mmm) Aurivillius structure have also been synthesized.},
doi = {10.1016/j.materresbull.2006.08.009},
journal = {Materials Research Bulletin},
number = 5,
volume = 42,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2007},
month = {Thu May 03 00:00:00 EDT 2007}
}