Journal
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Volume 26, Issue 10, Pages 3125-3132Publisher
SPRINGER
DOI: 10.1007/s10948-013-2130-7
Keywords
BiFeO3 ceramics; Sintering atmosphere; Structure; Electrical properties
Categories
Funding
- National Natural Science Foundation of China [11175159]
- School Doctor Foundation of Zhengzhou University of Light Industry [2010BSJJ030]
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Bismuth ferrite (BiFeO3) ceramics were synthesized by the solid-state reaction method followed by rapid liquid phase sintering. The effect of sintering atmosphere (N-2, air and O-2) on the structure and electrical properties of BiFeO3 multiferroic ceramics were investigated. XRD analysis revealed that N-2 sintering was effective in reducing impurity phases and improving the crystallization behavior. XPS analysis showed that fewer Fe2+ ions but more oxygen vacancies were involved in the N-2 sintered ceramics. The SEM investigations suggested that the grain size of the BiFeO3 ceramics sintered in nitrogen are larger than those sintered in air and O-2. Electrical measurements revealed that the ceramics sintered in N-2 showed lower leakage current, superior dielectric and ferroelectric properties.
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