The possibility of mechanochemical synthesis of the lead magnesium niobate (PMN) powders of the composition Pb(Mg1/3Nb2/3)O-3 in iron vials was investigated. According to X-ray and energy-dispersive spectroscopy (EDS) analysis of the obtained powder mixtures, milling in iron vials resulted in incorporation of Fe and formation of PFN of composition Pb(Fe1/2Nb1/2)O-3 simultaneously with formation of PMN. Relative amounts of PMN and PFN were determined based on values of Curie temperature and lattice constant of perovskite phase. Although only 1 wt pct of Fe was incorporated, a stoichiometry of the system was significantly changed, resulting in formation of pyrochlore phase and excess MgO. Single-phase perovskite was obtained when the excess of PbO and Nb2O5 was added during mechanochemical synthesis. Because the dielectric properties were worse than expected, the alternative ways for improvement of dielectric properties were tried and discussed.
Ključne reči:
mechanochemistry / lead magnesium niobate
Izvor:
Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2008, 39A, 4, 875-879
TY - JOUR
AU - Branković, Zorica
AU - Branković, Goran
AU - Vukotić, Vesna M
AU - Tararam, R.
AU - Varela, JA
PY - 2008
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/247
AB - The possibility of mechanochemical synthesis of the lead magnesium niobate (PMN) powders of the composition Pb(Mg1/3Nb2/3)O-3 in iron vials was investigated. According to X-ray and energy-dispersive spectroscopy (EDS) analysis of the obtained powder mixtures, milling in iron vials resulted in incorporation of Fe and formation of PFN of composition Pb(Fe1/2Nb1/2)O-3 simultaneously with formation of PMN. Relative amounts of PMN and PFN were determined based on values of Curie temperature and lattice constant of perovskite phase. Although only 1 wt pct of Fe was incorporated, a stoichiometry of the system was significantly changed, resulting in formation of pyrochlore phase and excess MgO. Single-phase perovskite was obtained when the excess of PbO and Nb2O5 was added during mechanochemical synthesis. Because the dielectric properties were worse than expected, the alternative ways for improvement of dielectric properties were tried and discussed.
PB - Springer, New York
T2 - Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
T1 - Mechanochemical synthesis of lead magnesium niobate ceramics in iron media
EP - 879
IS - 4
SP - 875
VL - 39A
DO - 10.1007/s11661-007-9463-4
ER -
@article{
author = "Branković, Zorica and Branković, Goran and Vukotić, Vesna M and Tararam, R. and Varela, JA",
year = "2008",
abstract = "The possibility of mechanochemical synthesis of the lead magnesium niobate (PMN) powders of the composition Pb(Mg1/3Nb2/3)O-3 in iron vials was investigated. According to X-ray and energy-dispersive spectroscopy (EDS) analysis of the obtained powder mixtures, milling in iron vials resulted in incorporation of Fe and formation of PFN of composition Pb(Fe1/2Nb1/2)O-3 simultaneously with formation of PMN. Relative amounts of PMN and PFN were determined based on values of Curie temperature and lattice constant of perovskite phase. Although only 1 wt pct of Fe was incorporated, a stoichiometry of the system was significantly changed, resulting in formation of pyrochlore phase and excess MgO. Single-phase perovskite was obtained when the excess of PbO and Nb2O5 was added during mechanochemical synthesis. Because the dielectric properties were worse than expected, the alternative ways for improvement of dielectric properties were tried and discussed.",
publisher = "Springer, New York",
journal = "Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science",
title = "Mechanochemical synthesis of lead magnesium niobate ceramics in iron media",
pages = "879-875",
number = "4",
volume = "39A",
doi = "10.1007/s11661-007-9463-4"
}
Branković, Z., Branković, G., Vukotić, V. M., Tararam, R.,& Varela, J.. (2008). Mechanochemical synthesis of lead magnesium niobate ceramics in iron media. in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
Springer, New York., 39A(4), 875-879.
https://doi.org/10.1007/s11661-007-9463-4
Branković Z, Branković G, Vukotić VM, Tararam R, Varela J. Mechanochemical synthesis of lead magnesium niobate ceramics in iron media. in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science. 2008;39A(4):875-879.
doi:10.1007/s11661-007-9463-4 .
Branković, Zorica, Branković, Goran, Vukotić, Vesna M, Tararam, R., Varela, JA, "Mechanochemical synthesis of lead magnesium niobate ceramics in iron media" in Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 39A, no. 4 (2008):875-879,
https://doi.org/10.1007/s11661-007-9463-4 . .
