Investigation of the protonic conduction in Sm doped BaCeO3

Gorbova, E.; Maragou, V.; Medvedev, Dmitry; Demin, A.; Tsiakaras, Panagiotis

doi:10.1016/j.jpowsour.2008.01.036

Cited by 101 publications

(51 citation statements)

References 49 publications

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“…9) after calcined at 1050 o C, which is lower than previously reported works (calcining T > 1150 o C for BGC 8,9,12,21 and > 1300 o C for BSC). 10,11,22 After sintering, the XRD analysis of unpolished BGC and BSC pellets shows the presence of additional phases, such as CeO 2 and BaCO 3 (Fig. 10).…”

Section: Phase Of Bgc and Bsc Powders And Pelletsmentioning

confidence: 99%

“…Y-doped BaZrO 3 (BYZ), Gd-doped BaCeO 3 (BGC) and Sm-doped BaCeO 3 (BSC) were focused in this study, due to their high proton conductivities over the PCFC operating temperature range. [1][2][3][4][5][6][7][8][9][10][11] The major drawback for the utilization of these materials is their high sintering temperatures of above 1600 o C for doped BaZrO 3 1-6 and above 1450 o C for doped BaCeO 3 7-12 to achieve the relative densities of > 93% required for fuel cell applications. Several studies have pursued to lower the sintering temperatures of these materials.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of doped BaZrO3 and BaCeO3 from nanopowders

Pornprasertsuk

Yuwapattanawong

Permkittikul

et al. 2012

Int. J. Precis. Eng. Manuf.

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To lower the calcining and sintering temperatures of 16 at% Y-doped BaZrO 3 (BYZ), Gd-doped BaCeO 3 (BGC) and Smdoped BaCeO 3 (BSC), nanopowders of BaCO 3 and either (i) yttria stabilized zirconia, (ii) Gd 2 O 3 and CeO 2 or (iii) Sm 2 O 3 and CeO 2 , were used as starting materials, respectively. BYZ powders were prepared by two mixing methods (i.e. ball milling and magnetic stirring), followed by calcination at 1050-1250 o C, while BSC and BGC powders were prepared by ball milling and calcined at 1050 o C. The results reveal that the ball milling and magnetic stirring methods yield similar results for BYZ powder preparation. By adding 1 wt% ZnO nanopowder, the average relative densities of BYZ pellets were increased from ∼70% to ∼96% at the sintering temperatures of 1300 o C. Thus, with the utilization of nanopowders and ZnO as a sintering aid, the calcining and sintering temperatures were lowered to 1050 o C and 1300 o C, respectively, while still attaining the relative bulk densities of both BYZ and BGC higher than 95.7%. However, since the relative bulk density of BSC reached only 93% even sintered at 1400 o C, ZnO was not an effective sintering aid for the BSC fabrication.

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Section: Phase Of Bgc and Bsc Powders And Pelletsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of doped BaZrO3 and BaCeO3 from nanopowders

Pornprasertsuk

Yuwapattanawong

Permkittikul

et al. 2012

Int. J. Precis. Eng. Manuf.

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“…Perovskites have a general formula of ABO 3 , whereas cations occupying the A site are typically larger than those residing at the B site. The diverse doping possibilities in both A and B sites allow for a wide range of oxygen vacancies and electronic conductivities, both attributes are essential in the resulting proton conductivities [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Chemical stability and electrical conductivity of BaCe0.4Zr0.4Gd0.1Dy0.1O3− perovskite

Tsai

Chen

Wang

et al. 2015

Ceramics International

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“…Many studies have focused on the simple ABO 3 perovskites (where A 2+ and B 4+ denote site cations), particularly cerates and zirconates, due to their high proton conducting performance when doping with trivalent cations (such as Y 3+ , Yb 3+ , Nd 3+ and Gd 3+ ) [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The ideal ABO 3 perovskite structure is built upon a framework of corner-linked BO 6 octahedra with the B 4+ cation placed in the center of each octahedron (6-coordinate site), and the A 2+ cation in the center of the cube formed by the octahedra (12-coordinate site); the orthorhombic phase can be regarded as a distortion of the ideal cubic configuration by octahedral tilting.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the studies have focused on the processing, defect chemistry and electrical behavior of doped barium cerates [6][7][8][9][10][11][12][13][14][15][16][17][18]. Reports on the microstructural evolution with doping are, however, very limited [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%