Pb super(2+)-stabilized Ruddlesden-Popper (Sr sub(1-x)Pb sub( x)) sub(3)Ti sub(2)O sub(7) ceramics

Pb super(2+)-doped (Sr sub(1-x)Pb sub(x)) sub(3)Ti sub(2)O sub(7) (SPT) ceramics were fabricated by a solid state reaction. The stability and lattice structure of Sr sub(3)Ti sub(2)O sub(7) and Sr sub(4)Ti sub(3)O sub(10) Ruddlesden-Popper (RP) phases were studied as a function of Pb super(2+) conte...

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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:
Ceramics
Diffraction
Lattices
Phases
Raw materials
Short range order
Vaporization
X-rays
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Summary:Pb super(2+)-doped (Sr sub(1-x)Pb sub(x)) sub(3)Ti sub(2)O sub(7) (SPT) ceramics were fabricated by a solid state reaction. The stability and lattice structure of Sr sub(3)Ti sub(2)O sub(7) and Sr sub(4)Ti sub(3)O sub(10) Ruddlesden-Popper (RP) phases were studied as a function of Pb super(2+) content and sintering atmosphere. X-ray diffraction indicates that SrO(SrTiO sub(3)) sub(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 Sr sub(3)Ti sub(2)O sub(7) can be obtained. Sr sub(4)Ti sub(3)O sub(10) was found to be the main phase in the SPT samples for x greater than or equal to 0.075. Pb super(2+) stabilizes SrO(SrTiO sub(3)) sub(n) RP phases by substitution for Sr super(2+) 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 SrPbO sub(3) phase at lower temperature.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2016.164