1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures
Rent:
Rent this article for
USD
10.1063/1.4751357
/content/aip/journal/jap/112/5/10.1063/1.4751357
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/5/10.1063/1.4751357

Figures

Image of FIG. 1.
FIG. 1.

Piezoelectric properties of unmodified and La-modified NBT. (a)Polarization and (b) strain measurements as a function of applied electric field at a frequency of 1 Hz on unmodified and La-modified NBT.

Image of FIG. 2.
FIG. 2.

The thermal depolarization of NBT, as measured via the (a) in situ converse, and (b) ex situ direct piezoelectric coefficients. The temperatures shown in part b are the annealing temperatures.

Image of FIG. 3.
FIG. 3.

Relative permittivity and tan δ at selected frequencies and temperature for poled samples of (a) unmodified, (b) 0.5 at. % La-modified, (c) 1.0 at. % La-modified, and (d) 1.5 at. % La-modified NBT.

Image of FIG. 4.
FIG. 4.

Selected portions of HR-XRD patterns of NBT with varying La substitution. For simplicity, diffraction profiles are labeled relative to the pseudo-cubic planes.

Image of FIG. 5.
FIG. 5.

Rietveld refinement of an HR-XRD pattern of 1 at. % La-modified NBT showing the observed pattern (x) and the calculated fit (—). The line beneath is the difference between the observed and calculated intensities.

Image of FIG. 6.
FIG. 6.

Selected portions of HR-XRD patterns of 1 at. % La-substituted NBT at select temperatures.

Image of FIG. 7.
FIG. 7.

Selected portions of HR-XRD patterns of (a) unmodified and (b) 1 at. % La substituted NBT as a function of temperature.

Image of FIG. 8.
FIG. 8.

Coercive field of the various La-modified NBT compositions is shown versus the c/b lattice parameter ratio (right) and the β/βpc angle ratio (left). The βpc is the monoclinic angle for a cubic unit cell represented using a monoclinic setting.

Image of FIG. 9.
FIG. 9.

Depolarization temperature determined from measurements of in situ converse d 33 of the various La-modified NBT compositions is shown versus the calculated Pm m phase fraction at room temperature (bottom) and at 250 °C (top).

Tables

Generic image for table
Table I.

Depolarization temperatures, Td (°C), measured by in situ converse d 33, ex situ direct d 33 and permittivity in all investigated compositions.

Generic image for table
Table II.

Refined phase fractions, lattice parameters, cell volume, and criteria of fit parameters for samples with increasing La concentration at room temperature.

Generic image for table
Table III.

Refined phase fractions, lattice parameters, cell volume, and criteria of fit parameters for the 1 at. % La substituted NBT at selected temperatures.

Loading

Article metrics loading...

/content/aip/journal/jap/112/5/10.1063/1.4751357
2012-09-13
2014-04-21
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Structure and properties of La-modified Na0.5Bi0.5TiO3 at ambient and elevated temperatures
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/5/10.1063/1.4751357
10.1063/1.4751357
SEARCH_EXPAND_ITEM