Pb2+-stabilized Ruddlesden–Popper (Sr1−xPbx)3Ti2O7 ceramics

Pb2+-doped (Sr1−xPbx)3Ti2O7 (SPT) ceramics were fabricated by a solid state reaction. The stability and lattice structure of Sr3Ti2O7 and Sr4Ti3O10 Ruddlesden–Popper (RP) phases were studied as a function of Pb2+ content and sintering atmosphere. X-ray diffraction indicates that SrO(SrTiO3)n RP phas...

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Bibliographic Details
Published in:Journal of materials research 2016-05, Vol.31 (10), p.1456-1465
Main Authors: Gao, Feng, Chang, Yunfei, Poterala, Stephen F., Kupp, Elizabeth, Messing, Gary L.
Format: Article
Language:English
Subjects:
Analysis
Applied and Technical Physics
Biomaterials
Crystal lattices
Crystal structure
Decomposition
Editors
Heat conductivity
Hot pressing
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Nanotechnology
Phase transitions
Scanning electron microscopy
Semiconductor doping
Sintering
Solid state physics
Studies
Temperature
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Summary:Pb2+-doped (Sr1−xPbx)3Ti2O7 (SPT) ceramics were fabricated by a solid state reaction. The stability and lattice structure of Sr3Ti2O7 and Sr4Ti3O10 Ruddlesden–Popper (RP) phases were studied as a function of Pb2+ content and sintering atmosphere. X-ray diffraction indicates that SrO(SrTiO3)n RP phase formation is sensitive to the Sr:Ti ratio of the raw materials and is a complex circularly iterative process. When the PbO concentration is less than x = 0.03, pure Sr3Ti2O7 can be obtained. Sr4Ti3O10 was found to be the main phase in the SPT samples for x ≥ 0.075. Pb2+ stabilizes SrO(SrTiO3)n RP phases by substitution for Sr2+ which reduces the lattice stress of the RP phase. It was observed that SrO vaporization losses at high temperature can be compensated by the decomposition of the intermediate SrPbO3 phase at lower temperature.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2016.164