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Title: Bismuth iron titanate pyrochlores: Thermostability, structure and properties

Iron containing bismuth titanates with pyrochlore structure Bi{sub 1.6}Fe{sub x}Ti{sub 2}O{sub 7−δ}, where 0.08≤x≤0.4, were obtained by ceramic procedure. The results of bough pycnometric density of the pyrochlores and of X-ray powder diffraction structure refinement points to the preference for iron atoms to occupy the Bi{sup 3+}-sites. Electric and magnetic properties were studied for single phase pyrochlores based on bismuth titanates. The magnetic ordering was studied by the methods of Mössbauer spectroscopy and magnetic susceptibility. - Graphical abstract: The ideal crystal structure of pyrochlore A{sub 2}B{sub 2}O{sub 6}O' (A—Bi{sup 3+}, Fe{sup 3+}; B—Ti{sup 4+}, Fe{sup 3+}). Highlights: • Bismuth titanate pyrochlores stable over a wide temperature range were obtained. • The distribution of Fe{sup 3+} over various sites was determined. • The obtained systems were characterized by magnetic susceptibility, Mössbauer spectroscopy and conductivity.
Authors:
 [1] ; ;  [1] ; ; ; ;  [2]
  1. Institute of Chemistry, Komi Scientific Center, UB RAS, Syktyvkar, Pervomaiskaya 48 (Russian Federation)
  2. Sankt-Petersburg State University, Sankt-Petersburg (Russian Federation)
Publication Date:
OSTI Identifier:
22274045
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 204; Other Information: Copyright (c) 2013 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:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; BISMUTH; BISMUTH IONS; CERAMICS; CRYSTAL STRUCTURE; DENSITY; ELECTRICAL PROPERTIES; IRON; IRON IONS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; PYROCHLORE; SPECTROSCOPY; TITANATES; X-RAY DIFFRACTION