Some observations on the synthesis and electrolytic properties of (Ba1-xCax)(M0.9Y0.1)O-3, M = Ce, Zr-based samples modified with calcium

Dudek, M.; Lis, B.; Rapacz-Kmita, A.; Gajek, M.; Raźniak, A.; Drozdz, E.

doi:10.1515/msp-2016-0022

Artykuł - szczegóły

Tytuł artykułu

Some observations on the synthesis and electrolytic properties of (Ba1-xCax)(M0.9Y0.1)O-3, M = Ce, Zr-based samples modified with calcium

Autorzy

Dudek M. , Lis B. , Rapacz-Kmita A. , Gajek M. , Raźniak A. , Drozdz E.

Wybrane pełne teksty z tego czasopisma

Identyfikatory

DOI

10.1515/msp-2016-0022

Warianty tytułu

Języki publikacji

Abstrakty

In this paper, the impact of partial substitution of calcium for barium in (Ba_1-xCa_x)(M_0.9Y_0.1)O₃, M = Ce, Zr on physicochemical properties of the powders and sintered samples was investigated. The powders, with various contents of calcium (x = 0, 0.02, 0.05, 0.1), were prepared by means of thermal decomposition of organometallic precursors containing EDTA. All of the BaCeO₃-based powders synthesised at 1100 degrees C were monophasic with a rhombohedral structure, however, completely cubic BaZrO₃-based solid solutions were obtained at 1200 degrees C. A study of the sinterability of BaZr_0.9Y_0.1O₃ and BaCe_0.9Y _0.1O₃-based pellets was performed under non-isothermal conditions within a temperature range of 25 to 1200 degrees C. The partial substitution of barium for calcium in the (Ba_1-xCa_x)(M_0.9Y_0.1)O-₃, M = Ce, Zr solid solution improved the sinterability of the samples in comparison to the initial BaCe_0.9Y _0.1O₃ or BaZr_0.9Y _0.1 O₃. The relative density of calcium-modified BaCe_0.9Y _0.1O₃-based samples reached approximately 95 to 97 % after sintering at 1500 degrees C for 2 h in air. The same level of relative density was achieved after sintering calcium-modified BaZr_0.9Y _0.1O₃-at 1600 degrees C for 2 h. Analysis of the electrical conductivity from both series of investigated materials showed that the highest ionic conductivity, in air and wet 5 % H₂ in Ar, was attained for the compositions of x = 0.02 to 0.05 (Ba_1-xCa_x)(M_0.9Y_0.1)O₃, M = Zr, Ce. The oxygen reduction reaction on the interface Pt vertical bar BaM_0.9Y _0.1O₃, M = Ce, Zr was investigated using Pt microelectrodes. Selected samples of (Ba_1-xCa_x)(M_0.9Y_0.1)O₃, M = Zr, Ce were tested as ceramic electrolytes in hydrogen-oxygen solid oxide fuel cells operating at temperatures of 700 to 850 degrees C.

Słowa kluczowe

ceramics electrochemical measurements ionic conductivity IT-SOFC intermediate temperature solid oxide fuel cell

Wydawca

De Gruyter

Czasopismo

Materials Science Poland

Rocznik

2016

Tom

Vol. 34, No. 1

Strony

101--114

Opis fizyczny

Bibliogr. 43 poz., rys., tab.

Twórcy

autor

Dudek M.

potoczek@agh.edu.pl

AGH University of Science and Technology, Faculty of Fuels and Energy, al. Mickiewicza 30, 30-059 Cracow, Poland

autor

Lis B.

AGH University of Science and Technology, Faculty of Fuels and Energy, al. Mickiewicza 30, 30-059 Cracow, Poland

autor

Rapacz-Kmita A.

AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059Cracow, Poland

autor

Gajek M.

AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059Cracow, Poland

autor

Raźniak A.

AGH University of Science and Technology, Faculty of Fuels and Energy, al. Mickiewicza 30, 30-059 Cracow, Poland

autor

Drozdz E.

AGH University of Science and Technology, Faculty of Materials Science and Ceramics, al. Mickiewicza 30, 30-059Cracow, Poland

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-92e50a01-f2f7-49ee-acf8-149f1caaf440