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Assessment of the thermal expansion mismatch in lanthanum strontium cobalt ferrite-yttria stabilized zirconia two-layers systems using photoacoustic methodology
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10.1063/1.4800064
/content/aip/journal/apl/102/13/10.1063/1.4800064
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800064

Figures

Image of FIG. 1.
FIG. 1.

Schematic cross section of the open photoacoustic cell, which consists in a typical electret microphone with a metalized electret diaphragm separated from a metal back plate.

Image of FIG. 2.
FIG. 2.

Photoacoustic measurement on the YSZ sample: Natural logarithm of the rescaled normalized amplitude (triangles) and normalized phase (squares) as function of the square root of the modulation frequency. Solid lines represent the best fitting curves.

Image of FIG. 3.
FIG. 3.

Photoacoustic signal amplitude as function of the modulation frequency for the 4.61 composite LSCF+YSZ film sample. The solid curve fits the data to Eq. (1) , and the inset shows the details in the frequency range in which the dependence is observed.

Image of FIG. 4.
FIG. 4.

Photoacoustic signal amplitude as function of the modulation frequency for the composite LSCF+YSZ film samples. The solid curves fit the data to Eq. (1) , considering only the frequency range in which the thermoelastic contribution is predominant.

Image of FIG. 5.
FIG. 5.

Effective thermal diffusivity of the composite LSCF+YSZ (open symbols) and pure LSCF (solid symbols) film samples as function of the thickness fraction x. The solid lines represent the best data fitting to Eq. (2) .

Image of FIG. 6.
FIG. 6.

Effective thermal expansion coefficient of the (a) composite LSCF+YSZ and (b) pure LSCF film samples as function of the thickness fraction x. The solid lines represent the best data fitting to Eq. (3) .

Tables

Generic image for table
Table I.

Thermal diffusivity ( ), thermal conductivity ( ), and thermal expansion coefficient ( ) of the investigated materials.

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/content/aip/journal/apl/102/13/10.1063/1.4800064
2013-04-05
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Assessment of the thermal expansion mismatch in lanthanum strontium cobalt ferrite-yttria stabilized zirconia two-layers systems using photoacoustic methodology
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/13/10.1063/1.4800064
10.1063/1.4800064
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