TY - JOUR
T1 - Seeding of perovskite lead magnesium niobate crystallization from Pb-Mg-Nb-EDTA gels
AU - Narendar, Yeshwanth
AU - Messing, Gary L.
PY - 1999
Y1 - 1999
N2 - The addition of BaTiO3 seed particles (50 nm in diameter) to a Pb-Mg-Nb-EDTA solution (where EDTA represents ethylenediamine tetraacetic acid) reduces the formation temperature from 700°C to 600°C during combustion synthesis, because of epitaxial effects. The lower perovskite formation temperature eliminates the formation of pyrochlore at the surface of the precursor bed and allows for the direct crystallization of approx. 98% perovskite lead magnesium niobate (PMN) during combustion synthesis. Increasing the nucleation density of the seed particles in the seeded precursor decreases the precursor volume that is associated with each perovskite nucleus and, thus, reduces the PMN particle size from 1 μm to 0.2 μm. The influence of BaTiO3 seeding is discussed in terms of the thermodynamics of perovskite formation, the influence of BaTiO3 seed concentration, and epitaxial nucleation.
AB - The addition of BaTiO3 seed particles (50 nm in diameter) to a Pb-Mg-Nb-EDTA solution (where EDTA represents ethylenediamine tetraacetic acid) reduces the formation temperature from 700°C to 600°C during combustion synthesis, because of epitaxial effects. The lower perovskite formation temperature eliminates the formation of pyrochlore at the surface of the precursor bed and allows for the direct crystallization of approx. 98% perovskite lead magnesium niobate (PMN) during combustion synthesis. Increasing the nucleation density of the seed particles in the seeded precursor decreases the precursor volume that is associated with each perovskite nucleus and, thus, reduces the PMN particle size from 1 μm to 0.2 μm. The influence of BaTiO3 seeding is discussed in terms of the thermodynamics of perovskite formation, the influence of BaTiO3 seed concentration, and epitaxial nucleation.
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U2 - 10.1111/j.1151-2916.1999.tb01983.x
DO - 10.1111/j.1151-2916.1999.tb01983.x
M3 - Article
AN - SCOPUS:0032677071
SN - 0002-7820
VL - 82
SP - 1659
EP - 1664
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 7
ER -