Uneingeschränkter Zugang

Some observations on the synthesis and electrolytic properties of (Ba1-xCax) (M0.9Y0.1)O3, M = Ce, Zr-based samples modified with calcium

Magdalena Dudek
Magdalena Dudek
, 
Bartłomiej Lis
Bartłomiej Lis
, 
Alicja Rapacz-Kmita
Alicja Rapacz-Kmita
, 
Marcin Gajek
Marcin Gajek
, 
Andrzej Raźniak
Andrzej Raźniak
 und 
Ewa Drożdż
Ewa Drożdż
   | 27. Apr. 2016
Materials Science-Poland's Cover Image
Über diesen Artikel
Vorheriger Artikel
Nächster Artikel
Zitieren
Article Category: Research Article
Online veröffentlicht: 27. Apr. 2016
Seitenbereich: 101 - 114
Eingereicht: 07. Juli 2015
Akzeptiert: 11. Dez. 2015
DOI: https://doi.org/10.1515/msp-2016-0022
Schlüsselwörter
© 2016 Wroclaw University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

a) DTA and TG curves recorded for dried BaCe0.9Y0.1O3 and Ba0.95Ca0.05Ce0.9Y0.1O3 precursors; b) EGA gas analysis performed during DTA/TG thermal studies.
a) DTA and TG curves recorded for dried BaCe0.9Y0.1O3 and Ba0.95Ca0.05Ce0.9Y0.1O3 precursors; b) EGA gas analysis performed during DTA/TG thermal studies.

Fig. 2

Evolution of the X-ray diffraction pattern for theBaCe0.9Y0.1O3dried precursor.
Evolution of the X-ray diffraction pattern for theBaCe0.9Y0.1O3dried precursor.

Fig. 3

Variations in cell volume vs. chemical compositionof the (Ba1-xCax)(M0.9Y0.1), M = Ce, Zrsintered samples series.
Variations in cell volume vs. chemical compositionof the (Ba1-xCax)(M0.9Y0.1), M = Ce, Zrsintered samples series.

Fig. 4

Representative TEM microscopy imagesrecorded for: Ba0.95Ca0.05Zr0.9Y0.1O3 (a) and Ba0.95Ca0.05Ce0.9Y0.1O3 (b) powders.
Representative TEM microscopy imagesrecorded for: Ba0.95Ca0.05Zr0.9Y0.1O3 (a) and Ba0.95Ca0.05Ce0.9Y0.1O3 (b) powders.

Fig. 5

Dilatometric curves recorded for pellets during non-isothermalconditions between 25 and 1300 °C.
Dilatometric curves recorded for pellets during non-isothermalconditions between 25 and 1300 °C.

Fig. 6

SEM microphotographs of the microstructureof sintered samples: (a) BaZr0.9Y0.1O3, (b) Ba0.95Ca0.05Zr0.9Y0.1O3, and (c) Ba0.95Ca0.1 (Ce0.9Y0.1) O3.
SEM microphotographs of the microstructureof sintered samples: (a) BaZr0.9Y0.1O3, (b) Ba0.95Ca0.05Zr0.9Y0.1O3, and (c) Ba0.95Ca0.1 (Ce0.9Y0.1) O3.

Fig. 7

The temperature dependence of total electrical conductivity of (Ba1-xCax) (M0.9Y0.1) O3 M =Ce, Zr sintered samples measured in dry air.
The temperature dependence of total electrical conductivity of (Ba1-xCax) (M0.9Y0.1) O3 M =Ce, Zr sintered samples measured in dry air.

Fig. 8

The family of I-t curves recorded at 700 °C at overpotential (∆E −0.05 to −0.5 V). The Ba0.9Ca0.1Ce0.9Y0.1O3 electrolyte was used in this measurement.
The family of I-t curves recorded at 700 °C at overpotential (∆E −0.05 to −0.5 V). The Ba0.9Ca0.1Ce0.9Y0.1O3 electrolyte was used in this measurement.

Fig. 9

The family of I-t curves recorded at 700 °C under ∆E = −0.5 V in different gas atmospheres. The BaZr0.9Y0.1O3 electrolyte was used in this investigation.
The family of I-t curves recorded at 700 °C under ∆E = −0.5 V in different gas atmospheres. The BaZr0.9Y0.1O3 electrolyte was used in this investigation.

Fig. 10

The Nyquist plots for the Pt|BZY system recorded before and after polarization ∆E =-0.5 V. The measurements were performed at 700 °C in a wet argon gas atmosphere.
The Nyquist plots for the Pt|BZY system recorded before and after polarization ∆E =-0.5 V. The measurements were performed at 700 °C in a wet argon gas atmosphere.

Fig. 11

SEM images of Pt deposit on the surface of the BZY electrolyte recorded after polarization experiments.
SEM images of Pt deposit on the surface of the BZY electrolyte recorded after polarization experiments.

Fig. 12

The temperature dependence of OCV on the cells: O2|Pt|BCY and 5CBCY|Pt|H2 recorded between 500 to 850 °C.
The temperature dependence of OCV on the cells: O2|Pt|BCY and 5CBCY|Pt|H2 recorded between 500 to 850 °C.

Fig.13

The family curves U-I and P-I recorded for the cell: H2|Pt|BZY and 5CBZY|Pt|O2 at 850 °C.
The family curves U-I and P-I recorded for the cell: H2|Pt|BZY and 5CBZY|Pt|O2 at 850 °C.

The total electrical conductivity σ (S/cm) andactivation energy calculated in the temperature range of 300 to 700 °C. Data of measurements in wet 5 % H2 in Ar.

Materialσ [S/cm] at 600 °CEa [eV]
BaZr0.9Y0.1O38.29 × 10–40.78
Ba0.95Ca0.05Zr0.9Y0.1O31.24 × 10–30.74
Ba0.9Ca0.1Zr0.9Y0.1O39.05 × 10–40.80
BaCe0.9Y0.1O31.16 × 10–30.64
Ba0.95Ca0.05Ce0.9Y0.1O38.21 × 10–30.53
Ba0.9Ca0.1Ce0.9Y0.1O34.11 × 10–30.57

Hardness HV and fracture toughness KIc of selected (Ba1-xCax) (M0.9Y0.1) O3, M = Zr, Ce.

MaterialHV, GPaKICMPa·m0.5
BaZr0.9Y0.1O38.11±0.212.35±0.23
Ba0.95Ca0.05Zr0.9Y0.1O38.36±0.192.42±0.17
Ba0.9Ca0.1Zr0.9Y0.1O38.16±0.272.28±0.18
BaCe0.9Y0.1O37.01±0.181.66±0.24
Ba0.95Ca0.05Ce0.9Y0.1O37.19±0.111.74±0.22
Ba0.9Ca0.1Ce0.9Y0.1O37.24±0.201.88±0.28
eISSN:
2083-134X
Sprache:
Englisch
Zeitrahmen der Veröffentlichung:
4 Hefte pro Jahr
Fachgebiete der Zeitschrift:
Materialwissenschaft, andere, Nanomaterialien, Funktionelle und Intelligente Materialien, Charakterisierung und Eigenschaften von Materialien
Zeitschrift RSS Feed