TY - JOUR
T1 - Morphology, microstructure, and surface area of La-added MgFe2O4 powder
AU - Obata, Kenji
AU - Doi, Akane
AU - Nishibori, Maiko
AU - Shimanoe, Kengo
AU - Suzuki, Takuya
AU - Matsushima, Shigenori
N1 - Funding Information:
This work was supported in part by a Grant-in-Aid for Scientific Research [Grant No. (C) 15K05658 and Grant No. (C) 16K06782].
Publisher Copyright:
© 2018 The Ceramic Society of Japan. All rights reserved.
PY - 2018/5
Y1 - 2018/5
N2 - La-added and pure MgFe2O4 powders were prepared from a malic acid complex, and the effect of La-adding on the microstructure and specific surface area of MgFe2O4 powder were examined. There were no traces of impurity phases for pure MgFe2O4 powder in the X-ray diffraction measurement after calcination in the range of 600 to 800°C. When La atoms were added to MgFe2O4, the crystallite growth of MgFe2O4 was suppressed remarkably, resulting in a higher specific surface area in comparison with the pure material, and the lattice volume increased. X-ray photoelectron spectroscopy measurements showed that the binding energies of Mg 2s, Fe 2p, O 1s, and La 3d signals were in good agreement with the Mg2+, Fe3+, O21, and La3+ valence states, respectively. Scanning electron microscopy observations revealed that MgFe2O4 powder shows an aggregation of granular particles and that the individual particles are tightly interconnected with each other, whereas smaller particles compared with pure MgFe2O4 were observed for the La-added powder. It was found from the N2 adsorption measurement, moreover, that the amount of mesopore increases with La addition.
AB - La-added and pure MgFe2O4 powders were prepared from a malic acid complex, and the effect of La-adding on the microstructure and specific surface area of MgFe2O4 powder were examined. There were no traces of impurity phases for pure MgFe2O4 powder in the X-ray diffraction measurement after calcination in the range of 600 to 800°C. When La atoms were added to MgFe2O4, the crystallite growth of MgFe2O4 was suppressed remarkably, resulting in a higher specific surface area in comparison with the pure material, and the lattice volume increased. X-ray photoelectron spectroscopy measurements showed that the binding energies of Mg 2s, Fe 2p, O 1s, and La 3d signals were in good agreement with the Mg2+, Fe3+, O21, and La3+ valence states, respectively. Scanning electron microscopy observations revealed that MgFe2O4 powder shows an aggregation of granular particles and that the individual particles are tightly interconnected with each other, whereas smaller particles compared with pure MgFe2O4 were observed for the La-added powder. It was found from the N2 adsorption measurement, moreover, that the amount of mesopore increases with La addition.
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U2 - 10.2109/jcersj2.17270
DO - 10.2109/jcersj2.17270
M3 - Article
AN - SCOPUS:85046369616
SN - 1882-0743
VL - 126
SP - 402
EP - 407
JO - Journal of the Ceramic Society of Japan
JF - Journal of the Ceramic Society of Japan
IS - 5
ER -