High Throughput Synthesis and Characterization of the Pb<sub><em>n</em></sub>Nb<sub>2</sub>O<sub>5+<em>n</em></sub> (0.5 < <em>n</em> < 4.1) System on a Single Chip

Mehdi Mirsaneh, Brian E. Hayden, Shu Miao, Jan Pokorny, Steve Perini, Eugene Furman, Michael T. Lanagan, Rick Ubic, Ian M. Reaney

Research output: Contribution to journalArticlepeer-review

Abstract

Most high throughput studies focus on assessing the effect of composition within a single known fundamental structure type, such as perovskite. Here we demonstrate how high throughput synthesis and screening can be used to establish structure–property relations in the PbO–Nb 2 O 5 system, for which eight distinct fundamental structure types are known to exist. PbNb 4 O 11 , PbNb 2 O 6 and pyrochlore could be easily distinguished by X-ray diffraction (XRD). However, XRD was insensitive to distortions of the pyrochlore structure and instead Raman spectroscopy was utilized to determine changes in symmetry from cubic to rhombohedral as the PbO concentration increased. High throughput screening of the capacitance revealed permittivity ( ε r ) maxima in the PbNb 4 O 11 ( ε r = 700) and cubic pyrochlore phases ( ε r = 450). The ε r of PbNb 4 O 11 has not to date been reported but the value for cubic pyrochlore is higher than that reported for bulk ceramics ( ε r = 270). Initial high electric field studies also revealed exceptionally high tunability (four times that reported for bismuth zinc niobate-based pyrochlores) of the capacitance in the pyrochlore phase.

Original languageAmerican English
JournalMaterials Science and Engineering Faculty Publications and Presentations
StatePublished - 1 Mar 2011

Keywords

  • electrical properties
  • microstructure
  • physical vapor deposition
  • structure–property relationship
  • thin films

EGS Disciplines

  • Materials Science and Engineering

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