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Phase Formation, Crystal Chemistry, And Properties In The System Bi2O3–Fe2O3–Nb2O5

Michael W. Lufaso, Terrell A. Vanderah, Ileana M. Pazos, I. Levin, Robert S. Roth, Juan Claudio Nino, Virgil Provenzano, Peter Karl Schenck
Published 2006 · Chemistry
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Subsolidus phase relations have been determined for the Bi{sub 2}O{sub 3}-Fe{sub 2}O{sub 3}-Nb{sub 2}O{sub 5} system in air (900-1075 deg. C). Three new ternary phases were observed-Bi{sub 3}Fe{sub 0.5}Nb{sub 1.5}O{sub 9} with an Aurivillius-type structure, and two phases with approximate stoichiometries Bi{sub 17}Fe{sub 2}Nb{sub 31}O{sub 106} and Bi{sub 17}Fe{sub 3}Nb{sub 30}O{sub 105} that appear to be structurally related to Bi{sub 8}Nb{sub 18}O{sub 57}. The fourth ternary phase found in this system is pyrochlore (A{sub 2}B{sub 2}O{sub 6}O'), which forms an extensive solid solution region at Bi-deficient stoichiometries (relative to Bi{sub 2}FeNbO{sub 7}) suggesting that {approx}4-15% of the A-sites are occupied by Fe{sup 3+}. X-ray powder diffraction data confirmed that all Bi-Fe-Nb-O pyrochlores form with positional displacements, as found for analogous pyrochlores with Zn, Mn, or Co iad of Fe. A structural refinement of the pyrochlore 0.4400:0.2700:0.2900 Bi{sub 2}O{sub 3}:Fe{sub 2}O{sub 3}:Nb{sub 2}O{sub 5} using neutron powder diffraction data is reported with the A cations displaced (0.43A) to 96g sites and O' displaced (0.29A) to 32e sites (Bi{sub 1.721}Fe{sub 0.190}(Fe{sub 0.866}Nb{sub 1.134})O{sub 7}, Fd3-bar m (no. 227), a=10.508(1)A). This displacive model is somewhat different from that reported for Bi{sub 1.5}Zn{sub 0.92}Nb{sub 1.5}O{sub 6.92}, which exhibits twice the concentration of small B-typemore » cations on the A-sites as the Fe system. Bi-Fe-Nb-O pyrochlores exhibited overall paramagnetic behavior with large negative Curie-Weiss temperature intercepts, slight superparamagnetic effects, and depressed observed moments compared to high-spin, spin-only values. The single-phase pyrochlore with composition Bi{sub 1.657}Fe{sub 1.092}Nb{sub 1.150}O{sub 7} exhibited low-temperature dielectric relaxation similar to that observed for Bi{sub 1.5}Zn{sub 0.92}Nb{sub 1.5}O{sub 6.92}; at 1MHz and 200K the relative permittivity was 125, and above 350K conductive effects were observed.« less



This paper is referenced by
10.1016/J.SSI.2018.12.017
Li- and Mg-codoped bismuth niobate pyrochlores: Synthesis, structure, electrical properties
M. S. Koroleva (2019)
10.1111/J.1551-2916.2010.03819.X
Formation Kinetics of a Bi3Nb1−xTaxO7 Fluorite‐Type Solid Solution and Thermodynamic Stability of the Bi3TaO7 End Member
Urša Pirnat (2010)
10.1016/J.JALLCOM.2017.01.041
Investigation on a new multiferroic compound KBiFe2O5: Structural, optical, electrical and magnetic properties
Ming Zhang (2017)
10.1134/S0036023617070063
Optical and vibrational spectra of Bi1.8Fe1.2(1 – x)Ga1.2xSbO7 solid solutions with pyrochlore-type structure
A. V. Egorysheva (2017)
10.1080/00150193.2015.1071628
Dielectric Properties of Ca Doping α-BZN Ceramics
Ding Shi-hua (2015)
10.1111/IJAC.12547
Synthesis and Electrical Properties of Zn‐substituted Bismuth Copper Tantalate Pyrochlores
Mun Ping Chon (2016)
10.1016/J.SSI.2012.02.051
Bismuth manganese titanate: Crystal structure and properties
I. V. Piir (2012)
10.1016/J.MATLET.2016.01.120
Effect of Nb doping on the morphology and multiferroic behavior of Bi0.9La0.1FeO3 ceramics
V. A. Khomchenko (2016)
10.1016/J.JALLCOM.2013.11.197
Novel monoclinic zirconolite in Bi2O3–CuO–Ta2O5 ternary system: Phase equilibria, structural and electrical properties
Kar Ban Tan (2014)
10.1016/J.JALLCOM.2018.05.258
Enhanced magnetic ordering transition temperature and broad dielectric relaxation in iron incorporated intergrown pyrochlore-spinel crystals
Raja Altaf U Rahman (2018)
10.1016/J.CERAMINT.2016.05.097
Magnetic and phonon transitions in B-site Co doped BiFeO3 ceramics
Yueh-Sheng Chiang (2016)
10.1016/J.SSI.2013.08.041
Chemistry, structure and properties of bismuth copper titanate pyrochlores
I. V. Piir (2014)
10.1016/J.SSI.2011.03.017
Off-stoichiometry effects on BiFeO3 thin films
Abdelilah Lahmar (2011)
10.1007/s10854-019-00840-0
Structural, dielectric and ferroelectric properties of lead free Gd-modified BiFeO3–BaTiO3 solid solution
Chakradhar Behera (2019)
10.1088/0953-8984/22/48/486004
Frustrated magnetism and local structural disorder in pyrochlore-type Bi1.89Fe1.16Nb0.95O6.95.
Wojciech Miiller (2010)
10.1134/S0031918X14130183
Effects of isothermal treatments on non-stoichiometrical preparation for the optimized perovskite structure of BiFeO3 bulk ceramics
Jeong-Jung Oak (2014)
10.1063/1.5081895
Room temperature magnetoelectric coupling and relaxor-like multiferroic nature in a biphase of cubic pyrochlore and spinel
Raja Altaf U Rahman (2019)
10.1016/J.MATCHEMPHYS.2010.07.009
Preparation and characterization of powders and thin films of Bi2AlNbO7 and Bi2InNbO7 pyrochlore oxides
Zaine Teixeira (2010)
10.15826/chimtech/2017.4.4.04
Synthesis, structure and electrical properties of Mg-, Ni-codoped bismuth niobates
M. S. Koroleva (2017)
10.1016/J.JALLCOM.2016.03.089
Subsolidus phase equilibria and electrical properties of pyrochlores in the Bi2O3–CuO–Ta2O5 ternary system
Mun Ping Chon (2016)
10.1002/SLCT.201600630
Influence of Structural Disorder on the Photoluminescence Properties of Eu3+ Doped Red Phosphors: Ca2Y3‐xNb3O14: xEu3+
T. S. Sreena (2016)
10.1007/s10854-014-1844-z
Structural and electrical properties of La-modified BiFeO3–BaTiO3 composites
Chakradhar Behera (2014)
10.1111/J.1551-2916.2012.05279.X
Electric and Magnetic Properties of Bilayered Lead‐Free Piezoelectric and Multiferroic Bi 0.9 Dy 0.1 FeO 3/ K 0.5 Na 0.5 NbO 3 Thin Films
Ling Chen (2012)
10.1021/CM200281Z
New (Bi1.88Fe0.12)(Fe1.42Te0.58)O6.87 Pyrochlore with Spin-Glass Transition
Gunda Santosh Babu (2011)
10.1016/J.JALLCOM.2016.06.283
Isomorphism in the Bi1.8Fe1.2(1−x)Ga1.2xSbO7 pyrochlores with spin glass transition
O. G. Éllert (2016)
10.1016/J.PHYSB.2011.12.029
Synthesis, magnetic properties and Mössbauer spectroscopy for the pyrochlore family Bi2BB′O7 with B=Cr and Fe and B′=Nb, Ta and Sb
María Calvo Blanco (2012)
10.1016/J.MATERRESBULL.2014.10.062
Synthesis and characterization of (Bi{sub 0.5}Ba{sub 0.5}) (Fe{sub 0.5}Ti{sub 0.5}) O{sub 3} ceramic
R. Padhee (2015)
10.6028/NIST.SP.1208
2016 NIST Center for Neutron Research accomplishments and opportunities
Steven R. Kline (2016)
10.1039/c3nr04260j
Intensive visible-light photoactivity of Bi- and Fe-containing pyrochlore nanoparticles.
Metka Benčina (2014)
10.1016/J.SOLIDSTATESCIENCES.2012.12.017
Correlation of microstructural and physical properties in bulk BiFeO3 prepared by rapid liquid-phase sintering
Archna Sagdeo (2013)
10.1016/J.JSSC.2012.10.021
Structural and magnetic characterisation of the pyrochlores Bi2−xFex(FeSb)O7, (x=0.1, 0.2, 0.3), Nd1.8Fe0.2(FeSb)O7 and Pr2(FeSb)O7
Mariana J. Whitaker (2013)
10.1016/j.jallcom.2019.152383
Enhancement of local piezoresponse in samarium and manganese co-doped bismuth ferrite ceramics
Chi-Shun Tu (2020)
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