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Fabrication and characterization of nanostructured Ba-doped BiFeO3 porous ceramics Cover

Fabrication and characterization of nanostructured Ba-doped BiFeO3 porous ceramics

Materials Science-Poland
Volume 34 (2016): Issue 1 (March 2016)
By:
Open Access
|Apr 2016

Figures & Tables

Fig. 1

Multi-step heat treatment cycle of samples sintered at 870 °C for 1h.
Multi-step heat treatment cycle of samples sintered at 870 °C for 1h.

Fig. 2

X-ray diffraction patterns of BBFO/PFs porous samples after sintering at 870 °C, 1 h.
X-ray diffraction patterns of BBFO/PFs porous samples after sintering at 870 °C, 1 h.

Fig. 3

X-ray diffraction patterns of urea-derived BiFeO₃ and Bi₀.₈Ba₀.₂FeO₃ porous ceramics sintered at 870 °C, 1 h.
X-ray diffraction patterns of urea-derived BiFeO₃ and Bi₀.₈Ba₀.₂FeO₃ porous ceramics sintered at 870 °C, 1 h.

Fig. 4

Density and relative porosity of BBFO/30PFs porous samples.
Density and relative porosity of BBFO/30PFs porous samples.

Fig. 5

FESEM images of BBFO/30PFs samples (a) BBH, (b) BBP, (c) BBU and (d) BBG.
FESEM images of BBFO/30PFs samples (a) BBH, (b) BBP, (c) BBU and (d) BBG.

Fig. 6

FESEM micrographs (a) microstructure of BBU porous sample at low magnification showing a mean pore size of 7.5 μm (b) nano-sized grains formed on the cell walls of BBU sample.
FESEM micrographs (a) microstructure of BBU porous sample at low magnification showing a mean pore size of 7.5 μm (b) nano-sized grains formed on the cell walls of BBU sample.

Fig. 7

FESEM micrographs of (a) BBP, (b) BBG porous samples showing some hexagonal grains.
FESEM micrographs of (a) BBP, (b) BBG porous samples showing some hexagonal grains.

Fig. 8

Room temperature hysteresis loops (M-H) of porous BBU and compact BBC samples.
Room temperature hysteresis loops (M-H) of porous BBU and compact BBC samples.

Porous samples code and specification of sacrificial pore former materials_

Sample codePorous sample identity (Matrix/wt.% of PFs)Sacrificial pore Formers specification
Density [g/cm³]Melting point [°C]Purity [%]Resource
BBHBBFO/30HDPE0.95130Commercial–
BBPBBFO/30PVA1.26230>99.0Merck
BBUBBFO/30Urea1.32133 – 135>95.0Merck
BBGBBFO/30Graphite2.16–>99.0MP Biomedicals
BBCBBFO-Compact––––

Comparison between the RT magnetic properties of BBU porous sample with some porous structures reported earlier_

Porous sampleHc [kA/m]Ms [A m²/kg]Mr [A m²/kg]Squareness (Mr/Ms)Reference
BBFO/30wt.% urea3801.850.970.524Current work
SiOC/35wt.% PMMA0.7170.060.004[16]
BaFe12O19/PU46.456.512.10.214[37]
Ni–Zn ferrite/wood5.4956––[36]
DOI: https://doi.org/10.1515/msp-2016-0017 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 148 - 156
Submitted on: Aug 4, 2015
Accepted on: Nov 26, 2015
Published on: Apr 27, 2016
Published by: Sciendo
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year
Keywords:
bismuth ferrite,
dopant,
nanostructures,
porous ceramics,
magnetic properties
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2016 E. Mostafavi, A. Ataie, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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