TY - JOUR
T1 - High Throughput Synthesis and Characterization of the PbnNb2O5+n (0.5 < n < 4.1) System on a Single Chip
AU - Mirsaneh, Mehdi
AU - Hayden, Brian E.
AU - Miao, Shu
AU - Pokorny, Jan
AU - Perini, Steve
AU - Furman, Eugene
AU - Lanagan, Michael T.
AU - Ubic, Rick
AU - Reaney, Ian M.
PY - 2011/3/1
Y1 - 2011/3/1
N2 - 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.
AB - 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.
KW - electrical properties
KW - microstructure
KW - physical vapor deposition
KW - structure–property relationship
KW - thin films
UR - https://scholarworks.boisestate.edu/mse_facpubs/32
UR - https://doi.org/10.1016/j.actamat.2010.12.023
M3 - Article
JO - Materials Science and Engineering Faculty Publications and Presentations
JF - Materials Science and Engineering Faculty Publications and Presentations
ER -