Microwave Sintering of IT SOFC Cathode Materials Based on Praseodymium Nickelates-Cobaltites | Sciact - CRIS-system of Boreskov Institute of Catalysis

Microwave Sintering of IT SOFC Cathode Materials Based on Praseodymium Nickelates-Cobaltites Conference Abstracts

Conference

15th International Conference on Microwave and High Frequency Heating (AMPERE 2015)
14-17 Sep 2015 , Krakow

Source

AMPERE 15th International Conference on Microwave and High Frequency Heating
Compilation, Department of Chemistry and Technology of Polymers, Cracow University of Technology. Krakow.2015. ISBN 9788392878445. РИНЦ

Output data

Year: 2015, Pages: 96 Pages count : 1

Tags

Microwave; Oxygen mobility; Perovskite; Sintering

Authors

Sadykov V.A. ^1,2 , Eremeev N.F. ¹ , Bolotov V.A. ¹ , Tanashov Yu.Yu. ¹ , Fedorova Yu.E. ^1,3 , Amanbayeva D.G. ^1,4 , Bobin A.S. ^1,2 , Muzykantov V.S. ¹ , Sadovskaya E.M. ¹ , Pelipenko V.V. ¹ , Lukashevich A.I. ¹ , Krieger T.A. ¹ , Ishchenko A.V. ^1,2

Affiliations

1	Boreskov Institute of Catalysis SB RAS, Lavrentieva av., 5, 630090, RUSSIA
2	Novosibirsk State University, Novosibirsk, RUSSIA
3	Novosibirsk State Pedagogical University, Novosibirsk, RUSSIA
4	Novosibirsk State Technical University, Novosibirsk, RUSSIA

PrNi1-xCoxO3-δ – Ce0.9Y0.1O2-δ composites are promising as IT SOFC cathodes provided their sintering conditions are optimized [1]. In this work effect of microwave sintering (MS) on properties of such materials is studied. Perovskite (P) PrNi0.5Co0.5O3-δ (PNC) and fluorite (F) Ce0.9Y0.1O2 (YDC) oxides were synthesized by Pechini route. PNC‒YDC composites were prepared by ultrasonic dis-persion. Pellets were sintered at 870 – 1100 °C using specially designed microwave set-up. Samples were characterized by XRD and TEM with EDX. Oxygen mobility was estimated by O2 TPD and oxygen isotope heteroexchange with 18O2 and C18O2. MS provides dense materials (porosity < 10 %) even at the lowest temperatures. PNC is single-phase P. Composites are comprised of P+F phases with Pr6O11 admixture, strong elements redistribution between P and F domains occurs. The total amount of oxygen desorbed is up to 20 monolayers for PNC and 70 monolayers for PNC–YDC, being ~ 1.5 times higher as compared to conventionally sintered (CS) samples. This is due to a higher disordering of P and F domains as well as their boundaries. The oxygen isotope exchange is characterized by R2 mechanism with the surface exchange constant ~10 6 cm/s and the oxygen tracer diffusion coefficient ~10 8 cm2/s at 700 °C (Table 1), being close to CS samples made at higher temperatures [1]. Hence, MS at lower temperatures provides even better functional characteristics of PNC‒YDC nanocomposite cathodes.

Sadykov V.A. , Eremeev N.F. , Bolotov V.A. , Tanashov Y.Y. , Fedorova Y.E. , Amanbayeva D.G. , Bobin A.S. , Muzykantov V.S. , Sadovskaya E.M. , Pelipenko V.V. , Lukashevich A.I. , Krieger T.A. , Ishchenko A.V.
Microwave Sintering of IT SOFC Cathode Materials Based on Praseodymium Nickelates-Cobaltites
In compilation AMPERE 15th International Conference on Microwave and High Frequency Heating. – Department of Chemistry and Technology of Polymers, Cracow University of Technology., 2015. – C.96. – ISBN 9788392878445. Scopus РИНЦ

Scopus:	2-s2.0-85014075823
Elibrary:	29481558

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